`credential reject` sends the erase action to each helper, but the
exact behaviour of erase isn't specified in documentation or tests.
Some helpers (such as credential-store and credential-libsecret) delete
all matching credentials, others (such as credential-cache) delete at
most one matching credential.
Test that helpers erase all matching credentials. This behaviour is
easiest to reason about. Users expect that `echo
"url=https://example.com" | git credential reject` or `echo
"url=https://example.com\nusername=tim" | git credential reject` erase
all matching credentials.
Fix credential-cache.
Signed-off-by: M Hickford <mirth.hickford@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Test that credential helpers do not erase a password distinct from the
input. Such calls can happen when multiple credential helpers are
configured.
Fixes for credential-cache and credential-store.
Signed-off-by: M Hickford <mirth.hickford@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
While both git-rev-list(1) and git-log(1) support `--stdin`, it only
accepts commits and files. Most notably, it is impossible to pass any of
the pseudo-opts like `--all`, `--glob=` or others via stdin.
This makes it hard to use this function in certain scripted scenarios,
like when one wants to support queries against specific revisions, but
also against reference patterns. While this is theoretically possible by
using arguments, this may run into issues once we hit platform limits
with sufficiently large queries. And because `--stdin` cannot handle
pseudo-opts, the only alternative would be to use a mixture of arguments
and standard input, which is cumbersome.
Implement support for handling pseudo-opts in both commands to support
this usecase better. One notable restriction here is that `--stdin` only
supports "stuck" arguments in the form of `--glob=foo`. This is because
"unstuck" arguments would also require us to read the next line, which
would add quite some complexity to the code. This restriction should be
fine for scripted usage though.
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
When `diff.ignoreSubmodules = all` is set and submodule commits are
manually staged (e.g. via `git-update-index`), `git-commit` should
record the commit with updated submodules.
`index_differs_from` is called from `prepare_to_commit` with flags set to
`override_submodule_config = 1`. `index_differs_from` then merges the
default diff flags and passed flags.
When `diff.ignoreSubmodules` is set to "all", `flags` ends up having
both `override_submodule_config` and `ignore_submodules` set to 1. This
results in `git-commit` ignoring staged commits.
This patch restores original `flags.ignore_submodule` if
`flags.override_submodule_config` is set.
Signed-off-by: Josip Sokcevic <sokcevic@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Some atoms that can be used in "--format=<format>" for "git ls-tree"
were not supported by "git ls-files", even though they were relevant
in the context of the latter.
* zh/ls-files-format-atoms:
ls-files: align format atoms with ls-tree
"git pack-refs" learns "--include" and "--exclude" to tweak the ref
hierarchy to be packed using pattern matching.
* jc/pack-ref-exclude-include:
pack-refs: teach pack-refs --include option
pack-refs: teach --exclude option to exclude refs from being packed
docs: clarify git-pack-refs --all will pack all refs
The "-s" (silent, squelch) option of the "diff" family of commands
did not interact with other options that specify the output format
well. This has been cleaned up so that it will clear all the
formatting options given before.
* jc/diff-s-with-other-options:
diff: fix interaction between the "-s" option and other options
"git tag" learned to leave the "$GIT_DIR/TAG_EDITMSG" file when the
command failed, so that the user can salvage what they typed.
* kh/keep-tag-editmsg-upon-failure:
tag: keep the message file in case ref transaction fails
t/t7004-tag: add regression test for successful tag creation
doc: tag: document `TAG_EDITMSG`
When opening a MIDX bitmap, we the pack-bitmap machinery eagerly calls
`prepare_midx_pack()` on each of the packs contained in the MIDX. This
is done in order to populate the array of `struct packed_git *`s held by
the MIDX, which we need later on in `load_reverse_index()`, since it
calls `load_pack_revindex()` on each of the MIDX'd packs, and requires
that the caller provide a pointer to a `struct packed_git`.
When opening one of these packs fails, the pack-bitmap code will `die()`
indicating that it can't open one of the packs in the MIDX. This
indicates that the MIDX is somehow broken with respect to the current
state of the repository. When this is the case, we indeed cannot make
use of the MIDX bitmap to speed up reachability traversals.
However, it does not mean that we can't perform reachability traversals
at all. In other failure modes, that same function calls `warning()` and
then returns -1, indicating to its caller (`open_bitmap()`) that we
should either look for a pack bitmap if one is available, or perform
normal object traversal without using bitmaps at all.
There is no reason why this case should cause us to die. If we instead
continued (by jumping to `cleanup` as this patch does) and avoid using
bitmaps altogether, we may again try and query the MIDX, which will also
fail. But when trying to call `fill_midx_entry()` fails, it also returns
a signal of its failure, and prompts the caller to try and locate the
object elsewhere.
In other words, the normal object traversal machinery works fine in the
presence of a corrupt MIDX, so there is no reason that the MIDX bitmap
machinery should abort in that case when we could easily continue.
Note that we *could* in theory try again to load a MIDX bitmap after
calling `reprepare_packed_git()`. Even though the `prepare_packed_git()`
code is careful to avoid adding a pack that we already have,
`prepare_midx_pack()` is not. So if we got part of the way through
calling `prepare_midx_pack()` on a stale MIDX, and then tried again on a
fresh MIDX that contains some of the same packs, we would end up with a
loop through the `->next` pointer.
For now, let's do the simplest thing possible and fallback to the
non-bitmap code when we detect a stale MIDX so that the complete fix as
above can be implemented carefully.
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This patch introduces a new multi-valued configuration option,
`gc.recentObjectsHook` as a means to mark certain objects as recent (and
thus exempt from garbage collection), regardless of their age.
When performing a garbage collection operation on a repository with
unreachable objects, Git makes its decision on what to do with those
object(s) based on how recent the objects are or not. Generally speaking,
unreachable-but-recent objects stay in the repository, and older objects
are discarded.
However, we have no convenient way to keep certain precious, unreachable
objects around in the repository, even if they have aged out and would
be pruned. Our options today consist of:
- Point references at the reachability tips of any objects you
consider precious, which may be undesirable or infeasible if there
are many such objects.
- Track them via the reflog, which may be undesirable since the
reflog's lifetime is limited to that of the reference it's tracking
(and callers may want to keep those unreachable objects around for
longer).
- Extend the grace period, which may keep around other objects that
the caller *does* want to discard.
- Manually modify the mtimes of objects you want to keep. If those
objects are already loose, this is easy enough to do (you can just
enumerate and `touch -m` each one).
But if they are packed, you will either end up modifying the mtimes
of *all* objects in that pack, or be forced to write out a loose
copy of that object, both of which may be undesirable. Even worse,
if they are in a cruft pack, that requires modifying its `*.mtimes`
file by hand, since there is no exposed plumbing for this.
- Force the caller to construct the pack of objects they want
to keep themselves, and then mark the pack as kept by adding a
".keep" file. This works, but is burdensome for the caller, and
having extra packs is awkward as you roll forward your cruft pack.
This patch introduces a new option to the above list via the
`gc.recentObjectsHook` configuration, which allows the caller to
specify a program (or set of programs) whose output is treated as a set
of objects to treat as recent, regardless of their true age.
The implementation is straightforward. Git enumerates recent objects via
`add_unseen_recent_objects_to_traversal()`, which enumerates loose and
packed objects, and eventually calls add_recent_object() on any objects
for which `want_recent_object()`'s conditions are met.
This patch modifies the recency condition from simply "is the mtime of
this object more recent than the cutoff?" to "[...] or, is this object
mentioned by at least one `gc.recentObjectsHook`?".
Depending on whether or not we are generating a cruft pack, this allows
the caller to do one of two things:
- If generating a cruft pack, the caller is able to retain additional
objects via the cruft pack, even if they would have otherwise been
pruned due to their age.
- If not generating a cruft pack, the caller is likewise able to
retain additional objects as loose.
A potential alternative here is to introduce a new mode to alter the
contents of the reachable pack instead of the cruft one. One could
imagine a new option to `pack-objects`, say `--extra-reachable-tips`
that does the same thing as above, adding the visited set of objects
along the traversal to the pack.
But this has the unfortunate side-effect of altering the reachability
closure of that pack. If parts of the unreachable object graph mentioned
by one or more of the "extra reachable tips" programs is not closed,
then the resulting pack won't be either. This makes it impossible in the
general case to write out reachability bitmaps for that pack, since
closure is a requirement there.
Instead, keep these unreachable objects in the cruft pack (or set of
unreachable, loose objects) instead, to ensure that we can continue to
have a pack containing just reachable objects, which is always safe to
write a bitmap over.
Helped-by: Jeff King <peff@peff.net>
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
To partition the set of packs based on which ones are "kept" (either
they have a .keep file, or were otherwise marked via the `--keep-pack`
option) and "non-kept" ones (anything else), `git repack` uses its
`collect_pack_filenames()` function.
Ordinarily, we would rely on a convenience function such as
`get_all_packs()` to enumerate and partition the set of packs. But
`collect_pack_filenames()` uses `readdir()` directly to read the
contents of the "$GIT_DIR/objects/pack" directory, and adds each entry
ending in ".pack" to the appropriate list (either kept, or non-kept as
above).
This is subtly racy, since `collect_pack_filenames()` may see a pack
that is not fully staged (i.e., it is missing its ".idx" file).
Ordinarily, this doesn't cause a problem. But it can cause issues when
generating a cruft pack.
This is because `git repack` feeds (among other things) the list of
existing kept packs down to `git pack-objects --cruft` to indicate that
any kept packs will not be removed from the repository (so that the
cruft pack machinery can avoid packing objects that appear in those
packs as cruft).
But `read_cruft_objects()` lists packfiles by calling `get_all_packs()`.
So if a ".pack" file exists (necessary to get that pack to appear to
`collect_pack_filenames()`), but doesn't have a corresponding ".idx"
file (necessary to get that pack to appear via `get_all_packs()`), we'll
complain with:
fatal: could not find pack '.tmp-5841-pack-a6b0150558609c323c496ced21de6f4b66589260.pack'
Fix the above by teaching `collect_pack_filenames()` to only collect
packs with their corresponding `*.idx` files in place, indicating that
those packs have been fully staged.
There are a couple of things worth noting:
- Since each entry in the `extra_keep` list (which contains the
`--keep-pack` names) has a `*.pack` suffix, we'll have to swap the
suffix from ".pack" to ".idx", and compare that instead.
- Since we use the the `fname_kept_list` to figure out which packs to
delete (with `git repack -d`), we would have previously deleted a
`*.pack` with no index (since the existince of a ".pack" file is
necessary and sufficient to include that pack in the list of
existing non-kept packs).
Now we will leave it alone (since that pack won't appear in the
list). This is far more correct behavior, since we don't want
to race with a pack being staged. Deleting a partially staged pack
is unlikely, however, since the window of time between staging a
pack and moving its .idx file into place is miniscule.
Note that this window does *not* include the time it takes to
receive and index the pack, since the incoming data goes into
"$GIT_DIR/objects/tmp_pack_XXXXXX", which does not end in ".pack"
and is thus ignored by collect_pack_filenames().
In the future, this function should probably be rewritten as a callback
to `for_each_file_in_pack_dir()`, but this is the simplest change we
could do in the short-term.
Reported-by: Michael Haggerty <mhagger@github.com>
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The GPGSSH_VERIFYTIME prequeq makes use of "${GNUPGHOME}" but does not
create it. Require GPGSSH which creates the "${GNUPGHOME}" directory.
Additionally, it makes sense to require GPGSSH in GPGSSH_VERIFYTIME
because the latter builds on the former. If we can't use GPGSSH,
there's little point in checking whether GPGSSH_VERIFYTIME is usable.
Suggested-by: Junio C Hamano <gitster@pobox.com>
Signed-off-by: Todd Zullinger <tmz@pobox.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The 'read_replace_refs' global specifies whether or not we should
respect the references of the form 'refs/replace/<oid>' to replace which
object we look up when asking for '<oid>'. This global has caused issues
when it is not initialized properly, such as in b6551feadf (merge-tree:
load default git config, 2023-05-10).
To make this more robust, move its config-based initialization out of
git_default_config and into prepare_repo_settings(). This provides a
repository-scoped version of the 'read_replace_refs' global.
The global still has its purpose: it is disabled process-wide by the
GIT_NO_REPLACE_OBJECTS environment variable or by a call to
disable_replace_refs() in some specific Git commands.
Since we already encapsulated the use of the constant inside
replace_refs_enabled(), we can perform the initialization inside that
method, if necessary. This solves the problem of forgetting to check the
config, as we will check it before returning this value.
Due to this encapsulation, the global can move to be static within
replace-object.c.
There is an interesting behavior change possible here: we now have a
repository-scoped understanding of this config value. Thus, if there was
a command that recurses into submodules and might follow replace refs,
then it would now respect the core.useReplaceRefs config value in each
repository.
'git grep --recurse-submodules' is such a command that recurses into
submodules in-process. We can demonstrate the granularity of this config
value via a test in t7814.
Signed-off-by: Derrick Stolee <derrickstolee@github.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
In db9d67f2e9 (builtin/cat-file.c: support NUL-delimited input with
`-z`, 2022-07-22), we have introduced a new mode to read the input via
NUL-delimited records instead of newline-delimited records. This allows
the user to query for revisions that have newlines in their path
component. While unusual, such queries are perfectly valid and thus it
is clear that we should be able to support them properly.
Unfortunately, the commit only changed the input to be NUL-delimited,
but didn't change the output at the same time. While this is fine for
queries that are processed successfully, it is less so for queries that
aren't. In the case of missing commits for example the result can become
entirely unparsable:
```
$ printf "7ce4f05bae8120d9fa258e854a8669f6ea9cb7b1 blob 10\n1234567890\n\n\commit000" |
git cat-file --batch -z
7ce4f05bae blob 10
1234567890
commit missing
```
This is of course a crafted query that is intentionally gaming the
deficiency, but more benign queries that contain newlines would have
similar problems.
Ideally, we should have also changed the output to be NUL-delimited when
`-z` is specified to avoid this problem. As the input is NUL-delimited,
it is clear that the output in this case cannot ever contain NUL
characters by itself. Furthermore, Git does not allow NUL characters in
revisions anyway, further stressing the point that using NUL-delimited
output is safe. The only exception is of course the object data itself,
but as git-cat-file(1) prints the size of the object data clients should
read until that specified size has been consumed.
But even though `-z` has only been introduced a few releases ago in Git
v2.38.0, changing the output format retroactively to also NUL-delimit
output would be a backwards incompatible change. And while one could
make the argument that the output is inherently broken already, we need
to assume that there are existing users out there that use it just fine
given that revisions containing newlines are quite exotic.
Instead, introduce a new option `-Z` that switches to NUL-delimited
input and output. While this new option could arguably only switch the
output format to be NUL-delimited, the consequence would be that users
have to always specify both `-z` and `-Z` when the input may contain
newlines. On the other hand, if the user knows that there never will be
newlines in the input, they don't have to use either of those options.
There is thus no usecase that would warrant treating input and output
format separately, which is why we instead opt to "do the right thing"
and have `-Z` mean to NUL-terminate both formats.
The old `-z` option is marked as deprecated with a hint that its output
may become unparsable. It is thus hidden both from the synopsis as well
as the command's help output.
Co-authored-by: Toon Claes <toon@iotcl.com>
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The tests for git-cat-file(1) are quite old and haven't ever been
updated since they were introduced. They thus tend to use old idioms
that have since grown outdated. Most importantly, many of the tests use
`test $A = $B` to compare expected and actual output. This has the
downside that it is impossible to tell what exactly is different between
both versions in case the test fails.
Refactor the tests to instead use `test_cmp`. While more verbose, it
both tends to be more readable and will result in a nice diff in case
states don't match.
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
In t1006 we have a bunch of tests that verify the output format of the
git-cat-file(1) command. But while part of the output for some tests
would include commit timestamps, we don't verify those but instead strip
them before comparing expected with actual results. This is done by the
function `maybe_remove_timestamp`, which goes all the way back to the
ancient commit b335d3f121 (Add tests for git cat-file, 2008-04-23).
Our tests had been in a different shape back then. Most importantly we
didn't yet have the infrastructure to create objects with deterministic
timestamps. Nowadays we do though, and thus there is no reason anymore
to strip the timestamps.
Refactor the tests to not strip the timestamp anymore.
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The index is read in 'worktree.c' at two points:
1.The 'validate_no_submodules' function, which checks if there are any
submodules present in the worktree.
2.The 'check_clean_worktree' function, which verifies if a worktree is
'clean', i.e., there are no untracked or modified but uncommitted files.
This is done by running the 'git status' command, and an error message
is thrown if the worktree is not clean. Given that 'git status' is
already sparse-aware, the function is also sparse-aware.
Hence we can just set the requires-full-index to false for
"git worktree".
Add tests that verify that 'git worktree' behaves correctly when the
sparse index is enabled and test to ensure the index is not expanded.
The `p2000` tests demonstrate a ~20% execution time reduction for
'git worktree' using a sparse index:
(Note:the p2000 test results didn't reflect the huge speedup because of
the index reading time is minuscule comparing to the filesystem
operations.)
Test before after
-----------------------------------------------------------------------
2000.102: git worktree add....(full-v3) 3.15 2.82 -10.5%
2000.103: git worktree add....(full-v4) 3.14 2.84 -9.6%
2000.104: git worktree add....(sparse-v3) 2.59 2.14 -16.4%
2000.105: git worktree add....(sparse-v4) 2.10 1.57 -25.2%
Helped-by: Victoria Dye <vdye@github.com>
Signed-off-by: Shuqi Liang <cheskaqiqi@gmail.com>
Acked-by: Victoria Dye <vdye@github.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
If execve(2) fails with ENOENT and we report the error, we use the
format "cannot run %s", followed by the actual error message. For other
errors we use "cannot exec '%s'".
Stop making this subtle distinction and use the second format for all
execve(2) errors. This simplifies the code and makes the prefix more
precise by indicating the failed operation. It also allows us to
slightly simplify t1800.16.
On Windows -- which lacks execve(2) -- we already use a single format in
all cases: "cannot spawn %s".
Signed-off-by: René Scharfe <l.s.r@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
t1800.16 checks whether an attempt to run a hook script with a missing
executable in its #! line fails and reports that error. The expected
error message differs between platforms. The test handles two common
variants, but on NonStop OS we get a third one: "fatal: cannot exec
'bad-hooks/test-hook': ...", which causes the test to fail there.
We don't really care about the specific message text all that much here.
Use grep and a single regex with alternations to ascertain that we get
an error message (fatal or otherwise) about the failed invocation of the
hook, but don't bother checking if we get the right variant for the
platform the test is running on or whether quoting is done. This looser
check let's the test pass on NonStop OS.
Reported-by: Randall S. Becker <randall.becker@nexbridge.ca>
Signed-off-by: René Scharfe <l.s.r@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
From 02156b81bbb2cafb19d702c55d45714fcf224048 Mon Sep 17 00:00:00 2001
From: Derrick Stolee <derrickstolee@github.com>
Date: Wed, 7 Jun 2023 09:39:01 -0400
Subject: [PATCH v2 2/2] add: test use of brackets when color is disabled
The interactive add command, 'git add -i', displays a menu of options
using full words. When color is enabled, the first letter of each word
is changed to a highlight color to signal that the first letter could be
used as a command. Without color, brackets ("[]") are used around these
first letters.
This behavior was not previously tested directly in t3701, so add a test
for it now. Since we use 'git add -i >actual <input' without
'force_color', the color system recognizes that colors are not available
on stdout and will be disabled by default.
This test would reproduce correctly with or without the fix in the
previous commit to make sure that color.ui is respected in 'git add'.
Reported-by: Phillip Wood <phillip.wood@dunelm.org.uk>
Signed-off-by: Derrick Stolee <derrickstolee@github.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
When 'git add -i' and 'git add -p' were converted to a builtin, they
introduced a color bug: the 'color.ui' config setting is ignored.
The included test demonstrates an example that is similar to the
previous test, which focuses on customizing colors. Here, we are
demonstrating that colors are not being used at all by comparing the raw
output and the color-decoded version of that output.
The fix is simple, to use git_color_default_config() as the fallback for
git_add_config(). A more robust change would instead encapsulate the
git_use_color_default global in methods that would check the config
setting if it has not been initialized yet. Some ideas are being
discussed on this front [1], but nothing has been finalized.
[1] https://lore.kernel.org/git/pull.1539.git.1685716420.gitgitgadget@gmail.com/
This test case naturally bisects down to 0527ccb1b5 (add -i: default to
the built-in implementation, 2021-11-30), but the fix makes it clear
that this would be broken even if we added the config to use the builtin
earlier than this.
Reported-by: Greg Alexander <gitgreg@galexander.org>
Signed-off-by: Derrick Stolee <derrickstolee@github.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Duplicate the code for outputting the signature and its other
parameters for commits and tags in ref-filter from pretty. In the
future, this will help in getting rid of the current duplicate
implementations of such logic everywhere, when ref-filter can do
everything that pretty is doing.
The new atom "signature" and its friends are equivalent to the existing
pretty formats as follows:
%(signature) = %GG
%(signature:grade) = %G?
%(siganture:signer) = %GS
%(signature:key) = %GK
%(signature:fingerprint) = %GF
%(signature:primarykeyfingerprint) = %GP
%(signature:trustlevel) = %GT
Co-authored-by: Hariom Verma <hariom18599@gmail.com>
Co-authored-by: Jaydeep Das <jaydeepjd.8914@gmail.com>
Co-authored-by: Nsengiyumva Wilberforce <nsengiyumvawilberforce@gmail.com>
Mentored-by: Christian Couder <christian.couder@gmail.com>
Mentored-by: Hariom Verma <hariom18599@gmail.com>
Signed-off-by: Kousik Sanagavarapu <five231003@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
GnuPG v2.0.0 released in 2006, which according to its release notes
https://gnupg.org/download/release_notes.html
is the "First stable version of GnuPG integrating OpenPGP and S/MIME".
Use this version or its successors for tests that will fail for
versions less than v2.0.0 because of the difference in the output on
stderr between the versions (v2.* vs v0.* or v2.* vs v1.*). Skip if
the GPG version detected is less than v2.0.0.
Do not, however, remove the existing prereq GPG yet since a lot of tests
still work with the prereq GPG (that is even with versions v0.* or v1.*)
and some systems still use these versions.
Mentored-by: Christian Couder <christian.couder@gmail.com>
Mentored-by: Hariom Verma <hariom18599@gmail.com>
Signed-off-by: Kousik Sanagavarapu <five231003@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The --follow code doesn't handle most forms of pathspec magic. We check
that no unexpected ones have made it to try_to_follow_renames() with a
runtime GUARD_PATHSPEC() check, which gives behavior like this:
$ git log --follow ':(icase)makefile' >/dev/null
BUG: tree-diff.c:596: unsupported magic 10
Aborted
The same is true of ":(glob)", ":(attr)", and so on. It's good that we
notice the problem rather than continuing and producing a wrong answer.
But there are two non-ideal things:
1. The idea of GUARD_PATHSPEC() is to catch programming errors where
low-level code gets unexpected pathspecs. We'd usually try to catch
unsupported pathspecs by passing a magic_mask to parse_pathspec(),
which would give the user a much better message like:
pathspec magic not supported by this command: 'icase'
That doesn't happen here because git-log usually _does_ support
all types of pathspec magic, and so it passes "0" for the mask
(this call actually happens in setup_revisions()). It needs to
distinguish the normal case from the "--follow" one but currently
doesn't.
2. In addition to --follow, we have the log.follow config option. When
that is set, we try to turn on --follow mode only when there is a
single pathspec (since --follow doesn't handle anything else). But
really, that ought to be expanded to "use --follow when the
pathspec supports it". Otherwise, we'd complain any time you use an
exotic pathspec:
$ git config log.follow true
$ git log ':(icase)makefile' >/dev/null
BUG: tree-diff.c:596: unsupported magic 10
Aborted
We should instead just avoid enabling follow mode if it's not
supported by this particular invocation.
This patch expands our diff_check_follow_pathspec() function to cover
pathspec magic, solving both problems.
A few final notes:
- we could also solve (1) by passing the appropriate mask to
parse_pathspec(). But that's not great for two reasons. One is that
the error message is less precise. It says "magic not supported by
this command", but really it is not the command, but rather the
--follow option which is the problem. The second is that it always
calls die(). But for our log.follow code, we want to speculatively
ask "is this pathspec OK?" and just get a boolean result.
- This is obviously the right thing to do for ':(icase)' and most
other magic options. But ':(glob)' is a bit odd here. The --follow
code doesn't support wildcards, but we allow them anyway. From
try_to_follow_renames():
#if 0
/*
* We should reject wildcards as well. Unfortunately we
* haven't got a reliable way to detect that 'foo\*bar' in
* fact has no wildcards. nowildcard_len is merely a hint for
* optimization. Let it slip for now until wildmatch is taught
* about dry-run mode and returns wildcard info.
*/
if (opt->pathspec.has_wildcard)
BUG("wildcards are not supported");
#endif
So something like "git log --follow 'Make*'" is already doing the
wrong thing, since ":(glob)" behavior is already the default (it is
used only to countermand an earlier --noglob-pathspecs).
So we _could_ loosen the guard to allow :(glob), since it just
behaves the same as pathspecs do by default. But it seems like a
backwards step to do so. It already doesn't work (it hits the BUG()
case currently), and given that the user took an explicit step to
say "this pathspec should glob", it is reasonable for us to say "no,
--follow does not support globbing" (or in the case of log.follow,
avoid turning on follow mode). Which is what happens after this
patch.
- The set of allowed pathspec magic is obviously the same as in
GUARD_PATHSPEC(). We could perhaps factor these out to avoid
repetition. The point of having separate masks and GUARD calls is
that we don't necessarily know which parsed pathspecs will be used
where. But in this case, the two are heavily correlated. Still,
there may be some value in keeping them separate; it would make
anyone think twice about adding new magic to the list in
diff_check_follow_pathspec(). They'd need to touch
try_to_follow_renames() as well, which is the code that would
actually need to be updated to handle more exotic pathspecs.
- The documentation for log.follow says that it enables --follow
"...when a single <path> is given". We could possibly expand that to
say "with no unsupported pathspec magic", but that raises the
question of documenting which magic is supported. I think the
existing wording of "single <path>" sufficiently encompasses the
idea (the forbidden magic is stuff that might match multiple
entries), and the spirit remains the same.
Reported-by: Jim Pryor <dubiousjim@gmail.com>
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Move 'repository_format_worktree_config' out of the global scope and into
the 'repository' struct. This change is similar to how
'repository_format_partial_clone' was moved in ebaf3bcf1a (repository: move
global r_f_p_c to repo struct, 2021-06-17), adding it to the 'repository'
struct and updating 'setup.c' & 'repository.c' functions to assign the value
appropriately.
The primary goal of this change is to be able to load the worktree config of
a submodule depending on whether that submodule - not its superproject - has
'extensions.worktreeConfig' enabled. To ensure 'do_git_config_sequence()'
has access to the newly repo-scoped configuration, add a 'struct repository'
argument to 'do_git_config_sequence()' and pass it the 'repo' value from
'config_with_options()'.
Finally, add/update tests in 't3007-ls-files-recurse-submodules.sh' to
verify 'extensions.worktreeConfig' is read an used independently by
superprojects and submodules.
Signed-off-by: Victoria Dye <vdye@github.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Update 'do_git_config_sequence()' to read the worktree config from
'config.worktree' in 'opts->git_dir' rather than the gitdir of
'the_repository'.
The worktree config is loaded from the path returned by
'git_pathdup("config.worktree")', the 'config.worktree' relative to the
gitdir of 'the_repository'. If loading the config for a submodule, this path
is incorrect, since 'the_repository' is the superproject. 'opts->git_dir' is
the gitdir of the submodule being configured, so the config file in that
location should be read instead.
To ensure the use of 'opts->git_dir' is safe, require that 'opts->git_dir'
is set if-and-only-if 'opts->commondir' is set (rather than "only-if" as it
is now). In all current usage of 'config_options', these values are set
together, so the stricter check does not change any behavior.
Finally, add tests to 't3007-ls-files-recurse-submodules.sh' to verify the
corrected config is loaded. Use 'ls-files' to test this because, unlike some
other '--recurse-submodules' commands, 'ls-files' parses the config of the
submodule in the same process as the superproject (via 'show_submodule()' ->
'repo_read_index()' -> 'prepare_repo_settings()'). As a result,
'the_repository' points to the config of the superproject but the
commondir/gitdir in the config sequence will be that of the submodule,
providing the exact scenario needed to verify this patch.
The first test ('--recurse-submodules parses submodule repo config') checks
that the submodule's *repo* config is read when running 'ls-files' on the
superproject; this confirms already-working behavior, serving as a reference
for how worktree config parsing should behave. The second test
('--recurse-submodules parses submodule worktree config') tests the same
scenario as the previous but instead using the *worktree* config,
demonstrating the corrected behavior. The 'test_config' helper is extended
for this case so that it properly applies the '--worktree' option to the
configure/unconfigure operations it performs.
Note that, although the submodule worktree config is now parsed instead of
the superproject's, 'extensions.worktreeConfig' in the superproject still
controls whether or not the worktree config is enabled at all in the
submodule. This will be fixed in a later patch.
Signed-off-by: Victoria Dye <vdye@github.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
OpenSSH-9.0 requires a namespace option with `-Y check-novalidate`.
This was added in openssh-portable commit a0b5816f8 (upstream:
ssh-keygen -Y check-novalidate requires namespace or SEGV, 2022-03-18).
The -n option was documented as a required option since check-novalidate
was added in openssh-portable 8aa2aa3cd (upstream: Allow testing
signature syntax and validity without verifying, 2019-09-16).
Signed-off-by: Todd Zullinger <tmz@pobox.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The prereq guard added in 14903c8e92 (trace2 tests: guard pthread test
with "PTHREAD", 2022-11-24) lacks the S in PTHREADS, causing it to never
be satisfied. Fix the spelling of the prereq.
Signed-off-by: Todd Zullinger <tmz@pobox.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
In e0a862fdaf (submodule helper: convert relative URL to absolute URL if
needed, 2018-10-16), `prepare_to_clone_next_submodule()` lost the
ability to handle URL-less submodules, due to a change from:
if (repo_get_config_string_const(the_repostiory, sb.buf, &url))
url = sub->url;
to
if (repo_get_config_string_const(the_repostiory, sb.buf, &url)) {
if (starts_with_dot_slash(sub->url) ||
starts_with_dot_dot_slash(sub->url)) {
/* ... */
}
}
, which will segfault when `sub->url` is NULL, since both
`starts_with_dot_slash()` does not guard its arguments as non-NULL.
Guard the checks to both of the above functions by first checking
whether `sub->url` is non-NULL. There is no need to check whether `sub`
itself is NULL, since we already perform this check earlier in
`prepare_to_clone_next_submodule()`.
By adding a NULL-ness check on `sub->url`, we'll fall into the 'else'
branch, setting `url` to `sub->url` (which is NULL). Before attempting
to invoke `git submodule--helper clone`, check whether `url` is NULL,
and die() if it is.
Reported-by: Tribo Dar <3bodar@gmail.com>
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
"git ls-files --format" can be used to format the output of
multiple file entries in the index, while "git ls-tree --format"
can be used to format the contents of a tree object. However,
the current set of %(objecttype), "(objectsize)", and
"%(objectsize:padded)" atoms supported by "git ls-files --format"
is a subset of what is available in "git ls-tree --format".
Users sometimes need to establish a unified view between the index
and tree, which can help with comparison or conversion between the two.
Therefore, this patch adds the missing atoms to "git ls-files --format".
"%(objecttype)" can be used to retrieve the object type corresponding
to a file in the index, "(objectsize)" can be used to retrieve the
object size corresponding to a file in the index, and "%(objectsize:padded)"
is the same as "(objectsize)", except with padded format.
Signed-off-by: ZheNing Hu <adlternative@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Some tests still use the old format with four spaces indentation.
Standardize the tests to the new format with tab indentation.
Signed-off-by: John Cai <johncai86@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Some tests still use the old format with four spaces indentation.
Standardize the tests to the new format with tab indentation.
Signed-off-by: John Cai <johncai86@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Some tests still use the old format with four spaces indentation.
Standardize the tests to the new format with tab indentation.
Signed-off-by: John Cai <johncai86@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Some tests still use the old format with four spaces indentation.
Standardize the tests to the new format with tab indentation.
Signed-off-by: John Cai <johncai86@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Some tests still use the old format with four spaces indentation.
Standardize the tests to the new format with tab indentation.
Signed-off-by: John Cai <johncai86@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Some tests still use the old format with four spaces indentation.
Standardize the tests to the new format with tab indentation.
Signed-off-by: John Cai <johncai86@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Some tests still use the old format with four spaces indentation.
Standardize the tests to the new format with tab indentation.
Signed-off-by: John Cai <johncai86@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Some tests still use the old format with four spaces indentation.
Standardize the tests to the new format with tab indentation.
Signed-off-by: John Cai <johncai86@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Some tests still use the old format with four spaces indentation.
Standardize the tests to the new format with tab indentation.
Signed-off-by: John Cai <johncai86@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Some tests still use the old format with four spaces indentation.
Standardize the tests to the new format with tab indentation.
Signed-off-by: John Cai <johncai86@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
A few bugs in the sequencer machinery that results in miscounting
the steps have been corrected.
* js/rebase-count-fixes:
rebase -r: fix the total number shown in the progress
rebase --update-refs: fix loops
Small fixes.
* jc/do-not-negate-test-helpers:
test: do not negate test_path_is_* to assert absense
t2021: do not negate test_path_is_dir
tests: do not negate test_path_exists
Some tests still use the old format with four spaces indentation.
Standardize the tests to the new format with tab indentation.
Signed-off-by: John Cai <johncai86@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Some tests still use the old format with four spaces indentation.
Standardize the tests to the new format with tab indentation.
Signed-off-by: John Cai <johncai86@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Some tests still use the old format with four spaces indentation.
Standardize the tests to the new format with tab indentation.
Signed-off-by: John Cai <johncai86@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Some tests still use the old format with four spaces indentation.
Standardize the tests to the new format with tab indentation.
Signed-off-by: John Cai <johncai86@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Some tests still use the old format with four spaces indentation.
Standardize the tests to the new format with tab indentation.
Signed-off-by: John Cai <johncai86@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Some tests still use the old format with four spaces indentation.
Standardize the tests to the new format with tab indentation.
Signed-off-by: John Cai <johncai86@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Some tests still use the old format with four spaces indentation.
Standardize the tests to the new format with tab indentation.
Signed-off-by: John Cai <johncai86@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Some tests still use the old format with four spaces indentation.
Standardize the tests to the new format with tab indentation.
Signed-off-by: John Cai <johncai86@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Some tests still use the old format with four spaces indentation.
Standardize the tests to the new format with tab indentation.
Signed-off-by: John Cai <johncai86@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Some tests still use the old format with four spaces indentation.
Standardize the tests to the new format with tab indentation.
Signed-off-by: John Cai <johncai86@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Some tests still use the old format with four spaces indentation.
Standardize the tests to the new format with tab indentation.
Signed-off-by: John Cai <johncai86@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Some tests still use the old format with four spaces indentation.
Standardize the tests to the new format with tab indentation.
Signed-off-by: John Cai <johncai86@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Some tests still use the old format with four spaces indentation.
Standardize the tests to the new format with tab indentation.
Signed-off-by: John Cai <johncai86@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Some tests still use the old format with four spaces indentation.
Standardize the tests to the new format with tab indentation.
Signed-off-by: John Cai <johncai86@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Some tests in t1006-cat-file.sh used the older four space indent format.
Update these to use tabs.
Signed-off-by: John Cai <johncai86@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Some tests are still using the older four space indent format. Update
these to use tabs.
Signed-off-by: John Cai <johncai86@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Some tests are still using the older four space indent format. Update
these to use tabs.
Signed-off-by: John Cai <johncai86@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Some tests in t3210-pack-refs.sh used the older four space indent format.
Update these to use tabs.
Signed-off-by: John Cai <johncai86@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Some tests in t0030-stripspace.sh used the older four space indent
format. Update these to use tabs.
Signed-off-by: John Cai <johncai86@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Some tests in t0000-basic.sh used the older four space indent format.
Update these to use tabs.
Signed-off-by: John Cai <johncai86@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
We started unconditionally testing with CGIPassAuth directive but
it is unavailable in older Apache that ships with CentOS 7 that has
about a year of shelf-life still left. The test has conditionally
been disabled when running with an ancient Apache. This was a fix
for a recent regression caught before the release, so no need to
mention it in the release notes.
* jk/http-test-cgipassauth-unavailable-in-older-apache:
t/lib-httpd: make CGIPassAuth support conditional
The server side of "git clone" now advertises the necessary hints
to clients to help them to clone from an empty repository and learn
object hash algorithm and the (unborn) branch pointed at by HEAD,
even over the older v0/v1 protocol.
* bc/clone-empty-repo-via-protocol-v0:
upload-pack: advertise capabilities when cloning empty repos
When "git send-email" that uses the validate hook is fed a message
without and then with Message-ID, it failed to auto-assign a unique
Message-ID to the former and instead reused the Message-ID from the
latter, which has been corrected. This was a fix for a recent
regression caught before the release, so no need to mention it in
the release notes.
* jc/send-email-pre-process-fix:
t9001: mark the script as no longer leak checker clean
send-email: clear the $message_id after validation
We may allocate a message-id string via gen_message_id(), but we never
free it, causing a small leak. This can be demonstrated by running t9001
with a leak-checking build. The offending test is the one touched by
3ece9bf0f9 (send-email: clear the $message_id after validation,
2023-05-17), but the leak is much older than that. The test was simply
unlucky enough to trigger the leaking code path for the first time.
We can fix this by freeing the string at the end of the function. We can
also re-mark the test script as leak-free, effectively reverting
20bd08aefb (t9001: mark the script as no longer leak checker clean,
2023-05-17).
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Commit 988aad99b4 (t5563: add tests for basic and anoymous HTTP access,
2023-02-27) added tests that require Apache to support the CGIPassAuth
directive, which was added in Apache 2.4.13. This is fairly old (~8
years), but recent enough that we still encounter it in the wild (e.g.,
RHEL/CentOS 7, which is not EOL until June 2024).
We can live with skipping the new tests on such a platform. But
unfortunately, since the directive is used unconditionally in our
apache.conf, it means the web server fails to start entirely, and we
cannot run other HTTP tests at all (e.g., the basic ones in t5551).
We can fix that by making the config conditional, and only triggering it
for t5563. That solves the problem for t5551 (which then ignores the
directive entirely). For t5563, we'd see apache complain in start_httpd;
with the default setting of GIT_TEST_HTTPD, we'd then skip the whole
script.
But that leaves one small problem: people may set GIT_TEST_HTTPD=1
explicitly, which instructs the tests to fail (rather than skip) when we
can't start the webserver (to avoid accidentally missing some tests).
This could be worked around by having the user manually set
GIT_SKIP_TESTS on a platform with an older Apache. But we can be a bit
friendlier by doing the version check ourselves and setting an
appropriate prereq. We'll use the (lack of) prereq to then skip the rest
of t5563. In theory we could use the prereq to skip individual tests, but
in practice this whole script depends on it.
Reported-by: Todd Zullinger <tmz@pobox.com>
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The index is read in 'cmd_diff_tree' at two points:
1. The first index read was added in fd66bcc31f (diff-tree: read the
index so attribute checks work in bare repositories, 2017-12-06) to deal
with reading '.gitattributes' content. 77efbb366a (attr: be careful
about sparse directories, 2021-09-08) established that, in a sparse
index, we do _not_ try to load a '.gitattributes' file from within a
sparse directory.
2. The second index access point is involved in rename detection,
specifically when reading from stdin.This was initially added in
f0c6b2a2fd ([PATCH] Optimize diff-tree -[CM]--stdin, 2005-05-27), where
'setup' was set to 'DIFF_SETUP_USE_SIZE_CACHE |DIFF_SETUP_USE_CACHE'.
That assignment was later modified to drop the'DIFF_SETUP_USE_CACHE' in
ff7fe37b05 (diff.c: move read_index() code back to the caller,
2018-08-13).However, 'DIFF_SETUP_USE_SIZE_CACHE' seems to be unused as
of 6e0b8ed6d3 (diff.c: do not use a separate "size cache"., 2007-05-07)
and nothing about 'detect_rename' otherwise indicates index usage.
Hence we can just set the requires-full-index to false for "diff-tree".
Add tests that verify that 'git diff-tree' behaves correctly when the
sparse index is enabled and test to ensure the index is not expanded.
The `p2000` tests demonstrate a ~98% execution time reduction for
'git diff-tree' using a sparse index:
Test before after
-----------------------------------------------------------------------
2000.94: git diff-tree HEAD (full-v3) 0.05 0.04 -20.0%
2000.95: git diff-tree HEAD (full-v4) 0.06 0.05 -16.7%
2000.96: git diff-tree HEAD (sparse-v3) 0.59 0.01 -98.3%
2000.97: git diff-tree HEAD (sparse-v4) 0.61 0.01 -98.4%
2000.98: git diff-tree HEAD -- f2/f4/a (full-v3) 0.05 0.05 +0.0%
2000.99: git diff-tree HEAD -- f2/f4/a (full-v4) 0.05 0.04 -20.0%
2000.100: git diff-tree HEAD -- f2/f4/a (sparse-v3) 0.58 0.01 -98.3%
2000.101: git diff-tree HEAD -- f2/f4/a (sparse-v4) 0.55 0.01 -98.2%
Helped-by: Victoria Dye <vdye@github.com>
Signed-off-by: Shuqi Liang <cheskaqiqi@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The test uses "format-patch --thread" which is known to leak the
generated message ID list.
Plugging these leaks involves straightening out the memory ownership
rules around rev_info.message_id and rev_info.ref_message_ids, and
is beyond the scope of send-email fix, so for now mark the test as
leaky to unblock the topic before the release.
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Add a warning to `worktree add` when the command tries to reference
HEAD, there exist valid local branches, and the HEAD points to a
non-existent reference.
Current Behavior:
% git -C foo worktree list
/path/to/repo/foo dadc8e6dac [main]
/path/to/repo/foo_wt 0000000000 [badref]
% git -C foo worktree add ../wt1
Preparing worktree (new branch 'wt1')
HEAD is now at dadc8e6dac dummy commit
% git -C foo_wt worktree add ../wt2
hint: If you meant to create a worktree containing a new orphan branch
[...]
hint: Disable this message with "git config advice.worktreeAddOrphan false"
fatal: invalid reference: HEAD
%
New Behavior:
% git -C foo worktree list
/path/to/repo/foo dadc8e6dac [main]
/path/to/repo/foo_wt 0000000000 [badref]
% git -C foo worktree add ../wt1
Preparing worktree (new branch 'wt1')
HEAD is now at dadc8e6dac dummy commit
% git -C foo_wt worktree add ../wt2
warning: HEAD points to an invalid (or orphaned) reference.
HEAD path: '/path/to/repo/foo/.git/worktrees/foo_wt/HEAD'
HEAD contents: 'ref: refs/heads/badref'
hint: If you meant to create a worktree containing a new orphan branch
[...]
hint: Disable this message with "git config advice.worktreeAddOrphan false"
fatal: invalid reference: HEAD
%
Signed-off-by: Jacob Abel <jacobabel@nullpo.dev>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Extend DWIM to try to infer `--orphan` when in an empty repository. i.e.
a repository with an invalid/unborn HEAD, no local branches, and if
`--guess-remote` is used then no remote branches.
This behavior is equivalent to `git switch -c` or `git checkout -b` in
an empty repository.
Also warn the user (overriden with `-f`/`--force`) when they likely
intend to checkout a remote branch to the worktree but have not yet
fetched from the remote. i.e. when using `--guess-remote` and there is a
remote but no local or remote refs.
Current Behavior:
% git --no-pager branch --list --remotes
% git remote
origin
% git workree add ../main
hint: If you meant to create a worktree containing a new orphan branch
[...]
hint: Disable this message with "git config advice.worktreeAddOrphan false"
fatal: invalid reference: HEAD
% git workree add --guess-remote ../main
hint: If you meant to create a worktree containing a new orphan branch
[...]
hint: Disable this message with "git config advice.worktreeAddOrphan false"
fatal: invalid reference: HEAD
% git fetch --quiet
% git --no-pager branch --list --remotes
origin/HEAD -> origin/main
origin/main
% git workree add --guess-remote ../main
Preparing worktree (new branch 'main')
branch 'main' set up to track 'origin/main'.
HEAD is now at dadc8e6dac commit message
%
New Behavior:
% git --no-pager branch --list --remotes
% git remote
origin
% git workree add ../main
No possible source branch, inferring '--orphan'
Preparing worktree (new branch 'main')
% git worktree remove ../main
% git workree add --guess-remote ../main
fatal: No local or remote refs exist despite at least one remote
present, stopping; use 'add -f' to overide or fetch a remote first
% git workree add --guess-remote -f ../main
No possible source branch, inferring '--orphan'
Preparing worktree (new branch 'main')
% git worktree remove ../main
% git fetch --quiet
% git --no-pager branch --list --remotes
origin/HEAD -> origin/main
origin/main
% git workree add --guess-remote ../main
Preparing worktree (new branch 'main')
branch 'main' set up to track 'origin/main'.
HEAD is now at dadc8e6dac commit message
%
Signed-off-by: Jacob Abel <jacobabel@nullpo.dev>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Add a new advice/hint in `git worktree add` for when the user
tries to create a new worktree from a reference that doesn't exist.
Current Behavior:
% git init foo
Initialized empty Git repository in /path/to/foo/
% touch file
% git -C foo commit -q -a -m "test commit"
% git -C foo switch --orphan norefbranch
% git -C foo worktree add newbranch/
Preparing worktree (new branch 'newbranch')
fatal: invalid reference: HEAD
%
New Behavior:
% git init --bare foo
Initialized empty Git repository in /path/to/foo/
% touch file
% git -C foo commit -q -a -m "test commit"
% git -C foo switch --orphan norefbranch
% git -C foo worktree add newbranch/
Preparing worktree (new branch 'newbranch')
hint: If you meant to create a worktree containing a new orphan branch
hint: (branch with no commits) for this repository, you can do so
hint: using the --orphan option:
hint:
hint: git worktree add --orphan newbranch/
hint:
hint: Disable this message with "git config advice.worktreeAddOrphan false"
fatal: invalid reference: HEAD
% git -C foo worktree add -b newbranch2 new_wt/
Preparing worktree (new branch 'newbranch')
hint: If you meant to create a worktree containing a new orphan branch
hint: (branch with no commits) for this repository, you can do so
hint: using the --orphan option:
hint:
hint: git worktree add --orphan -b newbranch2 new_wt/
hint:
hint: Disable this message with "git config advice.worktreeAddOrphan false"
fatal: invalid reference: HEAD
%
Signed-off-by: Jacob Abel <jacobabel@nullpo.dev>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Add support for creating an orphan branch when adding a new worktree.
The functionality of this flag is equivalent to git switch's --orphan
option.
Current Behavior:
% git -C foo.git --no-pager branch -l
+ main
% git -C foo.git worktree add main/
Preparing worktree (new branch 'main')
HEAD is now at 6c93a75 a commit
%
% git init bar.git
Initialized empty Git repository in /path/to/bar.git/
% git -C bar.git --no-pager branch -l
% git -C bar.git worktree add main/
Preparing worktree (new branch 'main')
fatal: not a valid object name: 'HEAD'
%
New Behavior:
% git -C foo.git --no-pager branch -l
+ main
% git -C foo.git worktree add main/
Preparing worktree (new branch 'main')
HEAD is now at 6c93a75 a commit
%
% git init --bare bar.git
Initialized empty Git repository in /path/to/bar.git/
% git -C bar.git --no-pager branch -l
% git -C bar.git worktree add main/
Preparing worktree (new branch 'main')
fatal: invalid reference: HEAD
% git -C bar.git worktree add --orphan -b main/
Preparing worktree (new branch 'main')
% git -C bar.git worktree add --orphan -b newbranch worktreedir/
Preparing worktree (new branch 'newbranch')
%
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Jacob Abel <jacobabel@nullpo.dev>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Add tests to verify that the command performs operations the same with
`--quiet` as without it. Additionally verifies that all non-fatal output
is suppressed.
Signed-off-by: Jacob Abel <jacobabel@nullpo.dev>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Pull duplicate test code into a function so that additional opt
combinations can be tested succinctly.
Signed-off-by: Jacob Abel <jacobabel@nullpo.dev>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Recently git-send-email started parsing the same message twice, once
to validate _all_ the message before sending even the first one, and
then after the validation hook is happy and each message gets sent,
to read the contents to find out where to send to etc.
Unfortunately, the effect of reading the messages for validation
lingered even after the validation is done. Namely $message_id gets
assigned if exists in the input files but the variable is global,
and it is not cleared before pre_process_file runs. This causes
reading a message without a message-id followed by reading a message
with a message-id to misbehave---the sub reports as if the message
had the same id as the previously written one.
Clear the variable before starting to read the headers in
pre_process_file.
Tested-by: Douglas Anderson <dianders@chromium.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
When cloning an empty repository, protocol versions 0 and 1 currently
offer nothing but the header and flush packets for the /info/refs
endpoint. This means that no capabilities are provided, so the client
side doesn't know what capabilities are present.
However, this does pose a problem when working with SHA-256
repositories, since we use the capabilities to know the remote side's
object format (hash algorithm). As of 8b214c2e9d ("clone: propagate
object-format when cloning from void", 2023-04-05), this has been fixed
for protocol v2, since there we always read the hash algorithm from the
remote.
Fortunately, the push version of the protocol already indicates a clue
for how to solve this. When the /info/refs endpoint is accessed for a
push and the remote is empty, we include a dummy "capabilities^{}" ref
pointing to the all-zeros object ID. The protocol documentation already
indicates this should _always_ be sent, even for fetches and clones, so
let's just do that, which means we'll properly announce the hash
algorithm as part of the capabilities. This just works with the
existing code because we share the same ref code for fetches and clones,
and libgit2, JGit, and dulwich do as well.
There is one minor issue to fix, though. If we called send_ref with
namespaces, we would return NULL with the capabilities entry, which
would cause a crash. Instead, let's refactor out a function to print
just the ref itself without stripping the namespace and use it for our
special capabilities entry.
Add several sets of tests for HTTP as well as for local clones. The
behavior can be slightly different for HTTP versus a local or SSH clone
because of the stateless-rpc functionality, so it's worth testing both.
Signed-off-by: brian m. carlson <bk2204@github.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
"git --attr-source=<tree> cmd $args" is a new way to have any
command to read attributes not from the working tree but from the
given tree object.
* jc/attr-source-tree:
attr: teach "--attr-source=<tree>" global option to "git"
The ref transaction can fail after the user has written their tag
message. In particular, if there exists a tag `foo/bar` and `git tag -a
foo` is said then the command will only fail once it tries to write
`refs/tags/foo`, which is after the file has been unlinked.
Hold on to the message file for a little longer so that it is not
unlinked before the fatal error occurs.
Signed-off-by: Kristoffer Haugsbakk <code@khaugsbakk.name>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The standard tag message file is unlinked if the tag is created.
Signed-off-by: Kristoffer Haugsbakk <code@khaugsbakk.name>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
These tests use "! test_path_is_dir" or "! test_path_is_file" to
ensure that the path is not recursively checked out or "submodule
update" did not touch the working tree.
Use "test_path_is_missing" to assert that the path does not exist,
instead of negating test_path_is_* helpers; they are designed to be
loud in wrong occasions. Besides, negating "test_path_is_dir" would
mean we would be happy if a file exists there, which is not the case
for these tests.
Signed-off-by: Junio C Hamano <gitster@pobox.com>
In this test, a path (some_dir) that is originally a directory is to
be removed and then to be replaced with a file of the same name.
The expectation is that the path becomes a file at the end.
However, "! test_path_is_dir some_dir" is used to catch a breakage
that leaves the path as a directory.
But as with all the "test_path_is..." helpers, this use of the
helper makes it loud when the expectation (i.e. it is a directory)
is met, and otherwise is silent when it is not---this does not help
debugging.
Be more explicit and state that we expect the path to become a file.
Signed-off-by: Junio C Hamano <gitster@pobox.com>
As a way to assert the path 'foo' is missing, "! test_path_exists
foo" is a poor way to do so, as the helper is designed to complain
when 'foo' is missing, but the intention of the author who used
negated form was to make sure it does not exist. This does not
help debugging the tests.
Use test_path_is_missing instead, which is a more appropriate helper.
Signed-off-by: Junio C Hamano <gitster@pobox.com>
"git fetch" learned the "--porcelain" option that emits what it did
in a machine-parseable format.
* ps/fetch-output-format:
fetch: introduce machine-parseable "porcelain" output format
fetch: move option related variables into main function
fetch: lift up parsing of "fetch.output" config variable
fetch: introduce `display_format` enum
fetch: refactor calculation of the display table width
fetch: print left-hand side when fetching HEAD:foo
fetch: add a test to exercise invalid output formats
fetch: split out tests for output format
fetch: fix `--no-recurse-submodules` with multi-remote fetches
Teach "diff-files" not to expand sparse-index unless needed.
* sl/diff-files-sparse:
diff-files: integrate with sparse index
t1092: add tests for `git diff-files`
Retire "verbose" helper function from the test framework.
* jk/test-verbose-no-more:
t: drop "verbose" helper function
t7001: use "ls-files --format" instead of "cut"
t7001: avoid git on upstream of pipe
"git diff --dirstat" leaked memory, which has been plugged.
* jc/dirstat-plug-leaks:
diff: plug leaks in dirstat
diff: refactor common tail part of dirstat computation
"git fsck" learned to detect bit-flip breakages in the reachability
bitmap files.
* ds/fsck-bitmap:
fsck: use local repository
fsck: verify checksums of all .bitmap files
Test updates.
* ar/config-count-tests-updates:
t1300: add tests for missing keys
t1300: check stderr for "ignores pairs" tests
t1300: drop duplicate test
The tracing mechanism learned to notice and report when
auto-discovered bare repositories are being used, as allowing so
without explicitly stating the user intends to do so (with setting
GIT_DIR for example) can be used with social engineering as an
attack vector.
* gc/trace-bare-repo-setup:
setup: trace bare repository setups
Error messages given when working on an unborn branch that is
checked out in another worktree have been improved.
* rj/branch-unborn-in-other-worktrees:
branch: avoid unnecessary worktrees traversals
branch: rename orphan branches in any worktree
branch: description for orphan branch errors
branch: use get_worktrees() in copy_or_rename_branch()
branch: test for failures while renaming branches
For regular, non-`--rebase-merges` runs, there is very little work to do
for the parser when determining the total number of commands in a rebase
script: it is simply the number of lines after stripping the commented
lines and then trimming the trailing empty line, if any.
The `--rebase-merges` mode complicates things by introducing empty lines
and comments in the middle of the script. These should _not_ be counted
as commands, and indeed, when an interactive rebase is interrupted and
subsequently resumed, the total number of commands can magically shrink,
sometimes dramatically.
The reason for this strange behavior is that empty lines _are_ counted
in `edit_todo_list()` (but not the comments, as they are stripped via
`strbuf_stripspace(..., 1)`, which is a bug.
Let's fix this so that the correct total number is shown from the
get-go, by carefully adjusting it according to what's in the rebase
script. Extra care needs to be taken in case the user edits the script:
the number of commands might be different after the user edited than
beforehand.
Note: Even though commented lines are skipped in `edit_todo_list()`, we
still need to handle `TODO_COMMENT` items by decrementing the
already-incremented `total_nr` again: empty lines are also marked as
`TODO_COMMENT`.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Acked-by: Phillip Wood <phillip.wood@dunelm.org.uk>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Allow users to be more selective over which refs to pack by adding an
--include option to git-pack-refs.
The existing options allow some measure of selectivity. By default
git-pack-refs packs all tags. --all can be used to include all refs,
and the previous commit added the ability to exclude certain refs with
--exclude.
While these knobs give the user some selection over which refs to pack,
it could be useful to give more control. For instance, a repository may
have a set of branches that are rarely updated and would benefit from
being packed. --include would allow the user to easily include a set of
branches to be packed while leaving everything else unpacked.
Signed-off-by: John Cai <johncai86@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
At GitLab, we have a system that creates ephemeral internal refs that
don't live long before getting deleted. Having an option to exclude
certain refs from a packed-refs file allows these internal references to
be deleted much more efficiently.
Add an --exclude option to the pack-refs builtin, and use the ref
exclusions API to exclude certain refs from being packed into the final
packed-refs file
Signed-off-by: John Cai <johncai86@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The shebang was missing the leading `/` character, resulting in:
$ ./t5583-push-branches.sh
bash: ./t5583-push-branches.sh: cannot execute: required file not found
Add the missing character so the test can run.
Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The 'git merge-tree' command handles creating root trees for merges
without using the worktree. This is a critical operation in many Git
hosts, as they typically store bare repositories.
This builtin does not load the default Git config, which can have
several important ramifications.
In particular, one config that is loaded by default is
core.useReplaceRefs. This is typically disabled in Git hosts due to
the ability to spoof commits in strange ways.
Since this config is not loaded specifically during merge-tree, users
were previously able to use refs/replace/ references to make pull
requests that looked valid but introduced malicious content. The
resulting merge commit would have the correct commit history, but the
malicious content would exist in the root tree of the merge.
The fix is simple: load the default Git config in cmd_merge_tree().
This may also fix other behaviors that are effected by reading default
config. The only possible downside is a little extra computation time
spent reading config. The config parsing is placed after basic argument
parsing so it does not slow down usage errors.
Helped-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Derrick Stolee <derrickstolee@github.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The output of git-fetch(1) is obviously designed for consumption by
users, only: we neatly columnize data, we abbreviate reference names, we
print neat arrows and we don't provide information about actual object
IDs that have changed. This makes the output format basically unusable
in the context of scripted invocations of git-fetch(1) that want to
learn about the exact changes that the command performs.
Introduce a new machine-parseable "porcelain" output format that is
supposed to fix this shortcoming. This output format is intended to
provide information about every reference that is about to be updated,
the old object ID that the reference has been pointing to and the new
object ID it will be updated to. Furthermore, the output format provides
the same flags as the human-readable format to indicate basic conditions
for each reference update like whether it was a fast-forward update, a
branch deletion, a rejected update or others.
The output format is quite simple:
```
<flag> <old-object-id> <new-object-id> <local-reference>\n
```
We assume two conditions which are generally true:
- The old and new object IDs have fixed known widths and cannot
contain spaces.
- References cannot contain newlines.
With these assumptions, the output format becomes unambiguously
parseable. Furthermore, given that this output is designed to be
consumed by scripts, the machine-readable data is printed to stdout
instead of stderr like the human-readable output is. This is mostly done
so that other data printed to stderr, like error messages or progress
meters, don't interfere with the parseable data.
A notable ommission here is that the output format does not include the
remote from which a reference was fetched, which might be important
information especially in the context of multi-remote fetches. But as
such a format would require us to print the remote for every single
reference update due to parallelizable fetches it feels wasteful for the
most likely usecase, which is when fetching from a single remote.
In a similar spirit, a second restriction is that this cannot be used
with `--recurse-submodules`. This is because any reference updates would
be ambiguous without also printing the repository in which the update
happens.
Considering that both multi-remote and submodule fetches are user-facing
features, using them in conjunction with `--porcelain` that is intended
for scripting purposes is likely not going to be useful in the majority
of cases. With that in mind these restrictions feel acceptable. If
usecases for either of these come up in the future though it is easy
enough to add a new "porcelain-v2" format that adds this information.
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
`store_updated_refs()` parses the remote reference for two purposes:
- It gets used as a note when writing FETCH_HEAD.
- It is passed through to `display_ref_update()` to display
updated references in the following format:
```
* branch master -> master
```
In most cases, the parsed remote reference is the prettified reference
name and can thus be used for both cases. But if the remote reference is
HEAD, the parsed remote reference becomes empty. This is intended when
we write the FETCH_HEAD, where we skip writing the note in that case.
But when displaying the updated references this leads to inconsistent
output where the left-hand side of reference updates is missing in some
cases:
```
$ git fetch origin HEAD HEAD:explicit-head :implicit-head main
From https://github.com/git/git
* branch HEAD -> FETCH_HEAD
* [new ref] -> explicit-head
* [new ref] -> implicit-head
* branch main -> FETCH_HEAD
```
This behaviour has existed ever since the table-based output has been
introduced for git-fetch(1) via 165f390250 (git-fetch: more terse fetch
output, 2007-11-03) and was never explicitly documented either in the
commit message or in any of our tests. So while it may not be a bug per
se, it feels like a weird inconsistency and not like it was a concious
design decision.
The logic of how we compute the remote reference name that we ultimately
pass to `display_ref_update()` is not easy to follow. There are three
different cases here:
- When the remote reference name is "HEAD" we set the remote
reference name to the empty string. This is the case that causes
the left-hand side to go missing, where we would indeed want to
print "HEAD" instead of the empty string. This is what
`prettify_refname()` would return.
- When the remote reference name has a well-known prefix then we
strip this prefix. This matches what `prettify_refname()` does.
- Otherwise, we keep the fully qualified reference name. This also
matches what `prettify_refname()` does.
As the return value of `prettify_refname()` would do the correct thing
for us in all three cases, we can thus fix the inconsistency by passing
through the full remote reference name to `display_ref_update()`, which
learns to call `prettify_refname()`. At the same time, this also
simplifies the code a bit.
Note that this patch also changes formatting of the block that computes
the "kind" (which is the category like "branch" or "tag") and "what"
(which is the prettified reference name like "master" or "v1.0")
variables. This is done on purpose so that it is part of the diff,
hopefully making the change easier to comprehend.
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Add a testcase that exercises the logic when an invalid output format is
passed via the `fetch.output` configuration.
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
We're about to introduce a new porcelain mode for the output of
git-fetch(1). As part of that we'll be introducing a set of new tests
that only relate to the output of this command.
Split out tests that exercise the output format of git-fetch(1) so that
it becomes easier to verify this functionality as a standalone unit. As
the tests assume that the default branch is called "main" we set up the
corresponding GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME environment variable
accordingly.
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
When running `git fetch --no-recurse-submodules`, the exectation is that
we don't fetch any submodules. And while this works for fetches of a
single remote, it doesn't when fetching multiple remotes at once. The
result is that we do recurse into submodules even though the user has
explicitly asked us not to.
This is because while we pass on `--recurse-submodules={yes,on-demand}`
if specified by the user, we don't pass on `--no-recurse-submodules` to
the subprocess spawned to perform the submodule fetch.
Fix this by also forwarding this flag as expected.
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
"git send-email" learned to give the e-mail headers to the validate
hook by passing an extra argument from the command line.
* ms/send-email-feed-header-to-validate-hook:
send-email: expose header information to git-send-email's sendemail-validate hook
send-email: refactor header generation functions
The implementation of credential helpers used fgets() over fixed
size buffers to read protocol messages, causing the remainder of
the folded long line to trigger unexpected behaviour, which has
been corrected.
* tb/credential-long-lines:
contrib/credential: embiggen fixed-size buffer in wincred
contrib/credential: avoid fixed-size buffer in libsecret
contrib/credential: .gitignore libsecret build artifacts
contrib/credential: remove 'gnome-keyring' credential helper
contrib/credential: avoid fixed-size buffer in osxkeychain
t/lib-credential.sh: ensure credential helpers handle long headers
credential.c: store "wwwauth[]" values in `credential_read()`
More header clean-up.
* en/header-split-cache-h-part-2: (22 commits)
reftable: ensure git-compat-util.h is the first (indirect) include
diff.h: reduce unnecessary includes
object-store.h: reduce unnecessary includes
commit.h: reduce unnecessary includes
fsmonitor: reduce includes of cache.h
cache.h: remove unnecessary headers
treewide: remove cache.h inclusion due to previous changes
cache,tree: move basic name compare functions from read-cache to tree
cache,tree: move cmp_cache_name_compare from tree.[ch] to read-cache.c
hash-ll.h: split out of hash.h to remove dependency on repository.h
tree-diff.c: move S_DIFFTREE_IFXMIN_NEQ define from cache.h
dir.h: move DTYPE defines from cache.h
versioncmp.h: move declarations for versioncmp.c functions from cache.h
ws.h: move declarations for ws.c functions from cache.h
match-trees.h: move declarations for match-trees.c functions from cache.h
pkt-line.h: move declarations for pkt-line.c functions from cache.h
base85.h: move declarations for base85.c functions from cache.h
copy.h: move declarations for copy.c functions from cache.h
server-info.h: move declarations for server-info.c functions from cache.h
packfile.h: move pack_window and pack_entry from cache.h
...
The commit object parser has been taught to be a bit more lenient
to parse timestamps on the author/committer line with a malformed
author/committer ident.
* jk/parse-commit-with-malformed-ident:
parse_commit(): describe more date-parsing failure modes
parse_commit(): handle broken whitespace-only timestamp
parse_commit(): parse timestamp from end of line
t4212: avoid putting git on left-hand side of pipe
Remove full index requirement for `git diff-files`. Refactor the
ensure_expanded and ensure_not_expanded functions by introducing a
common helper function, ensure_index_state. Add test to ensure the index
is no expanded in `git diff-files`.
The `p2000` tests demonstrate a ~96% execution time reduction for 'git
diff-files' and a ~97% execution time reduction for 'git diff-files'
for a file using a sparse index:
Test before after
-----------------------------------------------------------------------
2000.94: git diff-files (full-v3) 0.09 0.08 -11.1%
2000.95: git diff-files (full-v4) 0.09 0.09 +0.0%
2000.96: git diff-files (sparse-v3) 0.52 0.02 -96.2%
2000.97: git diff-files (sparse-v4) 0.51 0.02 -96.1%
2000.98: git diff-files -- f2/f4/a (full-v3) 0.06 0.07 +16.7%
2000.99: git diff-files -- f2/f4/a (full-v4) 0.08 0.08 +0.0%
2000.100: git diff-files -- f2/f4/a (sparse-v3) 0.46 0.01 -97.8%
2000.101: git diff-files -- f2/f4/a (sparse-v4) 0.51 0.02 -96.1%
Signed-off-by: Shuqi Liang <cheskaqiqi@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Before integrating the 'git diff-files' builtin with the sparse index
feature, add tests to t1092-sparse-checkout-compatibility.sh to ensure
it currently works with sparse-checkout and will still work with sparse
index after that integration.
When adding tests against a sparse-checkout definition, we test two
modes: all changes are within the sparse-checkout cone and some changes
are outside the sparse-checkout cone.
In order to have staged changes outside of the sparse-checkout cone,
make a directory called 'folder1' and copy `a` into 'folder1/a'.
'folder1/a' is identical to `a` in the base commit. These make
'folder1/a' in the index, while leaving it outside of the
sparse-checkout definition. Change content inside 'folder1/a' in order
to test 'folder1/a' being present on-disk with modifications.
Signed-off-by: Shuqi Liang <cheskaqiqi@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
It seems pretty clear 5236fce6b4 (t1507: stop losing return codes of git
commands, 2019-12-20) missed a test_cmp.
Cc: Denton Liu <liu.denton@gmail.com>
Signed-off-by: Felipe Contreras <felipe.contreras@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
We have a small helper function called "verbose", with the idea that you
can write:
verbose foo
to get a message to stderr when the "foo" command fails, even if it does
not produce any output itself. This goes back to 8ad1652418 (t5304: use
helper to report failure of "test foo = bar", 2014-10-10). It does work,
but overall it has not been a big success for two reasons:
1. Test writers have to remember to put it there (and the resulting
test code is longer as a result).
2. It doesn't handle the opposite case (we expect "foo" to fail, but
it succeeds), leading to inconsistencies in tests (which you can
see in many hunks of this patch, e.g. ones involving "has_cr").
Most importantly, we added a136f6d8ff (test-lib.sh: support -x option
for shell-tracing, 2014-10-10) at the same time, and it does roughly the
same thing. The output is not quite as succinct as "verbose", and you
have to watch out for stray shell-traces ending up in stderr. But it
solves both of the problems above, and has clearly become the preferred
tool.
Let's consider the "verbose" function a failed experiment and remove the
last few callers (which are all many years old, and have been dwindling
as we remove them from scripts we touch for other reasons). It will be
one less thing for new test writers to see and wonder if they should be
using themselves.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Since ls-files recently learned a "--format" option, we can use that
rather than asking for all of "--stage" and then pulling out the bits we
want with "cut". That's simpler and avoids two extra processes (one for
cut, and one for the subshell to hold the intermediate result).
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
We generally avoid git on the left-hand side of a pipe, because it loses
the exit code of the command (and thus we'd miss things like segfaults
or unexpected failures). In the cases in t7001, we wouldn't expect
failures (they are just inspecting the repository state, and are not the
main point of the test), but it doesn't hurt to be careful.
In all but one case here we're piping "ls-files --stage" to cut off the
pathname (since we compare entries before and after moving). Let's pull
that into a helper function to avoid repeating the slightly awkward
replacement.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
* 'on all' in the title of the test 'write-tree on all' was unclear;
remove it.
* Add a baseline 'test_all_match git write-tree' before making any
changes to the index, providing a reference point for the 'write-tree'
prior to any modifications.
* Add a comparison of the output of 'git status --porcelain=v2' to test
the working tree after 'write-tree' exits.
* Ensure SKIP_WORKTREE files weren't materialized on disk by using
"test_path_is_missing".
Signed-off-by: Shuqi Liang <cheskaqiqi@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
When reachability bitmap coverage exists in a repository, Git will use a
different (and hopefully faster) traversal to compute revision walks.
Consider a set of positive and negative tips (which we'll refer to with
their standard bitmap parlance by "wants", and "haves"). In order to
figure out what objects exist between the tips, the existing traversal
in `prepare_bitmap_walk()` does something like:
1. Consider if we can even compute the set of objects with bitmaps,
and fall back to the usual traversal if we cannot. For example,
pathspec limiting traversals can't be computed using bitmaps (since
they don't know which objects are at which paths). The same is true
of certain kinds of non-trivial object filters.
2. If we can compute the traversal with bitmaps, partition the
(dereferenced) tips into two object lists, "haves", and "wants",
based on whether or not the objects have the UNINTERESTING flag,
respectively.
3. Fall back to the ordinary object traversal if either (a) there are
more than zero haves, none of which are in the bitmapped pack or
MIDX, or (b) there are no wants.
4. Construct a reachability bitmap for the "haves" side by walking
from the revision tips down to any existing bitmaps, OR-ing in any
bitmaps as they are found.
5. Then do the same for the "wants" side, stopping at any objects that
appear in the "haves" bitmap.
6. Filter the results if any object filter (that can be easily
computed with bitmaps alone) was given, and then return back to the
caller.
When there is good bitmap coverage relative to the traversal tips, this
walk is often significantly faster than an ordinary object traversal
because it can visit far fewer objects.
But in certain cases, it can be significantly *slower* than the usual
object traversal. Why? Because we need to compute complete bitmaps on
either side of the walk. If either one (or both) of the sides require
walking many (or all!) objects before they get to an existing bitmap,
the extra bitmap machinery is mostly or all overhead.
One of the benefits, however, is that even if the walk is slower, bitmap
traversals are guaranteed to provide an *exact* answer. Unlike the
traditional object traversal algorithm, which can over-count the results
by not opening trees for older commits, the bitmap walk builds an exact
reachability bitmap for either side, meaning the results are never
over-counted.
But producing non-exact results is OK for our traversal here (both in
the bitmap case and not), as long as the results are over-counted, not
under.
Relaxing the bitmap traversal to allow it to produce over-counted
results gives us the opportunity to make some significant improvements.
Instead of the above, the new algorithm only has to walk from the
*boundary* down to the nearest bitmap, instead of from each of the
UNINTERESTING tips.
The boundary-based approach still has degenerate cases, but we'll show
in a moment that it is often a significant improvement.
The new algorithm works as follows:
1. Build a (partial) bitmap of the haves side by first OR-ing any
bitmap(s) that already exist for UNINTERESTING commits between the
haves and the boundary.
2. For each commit along the boundary, add it as a fill-in traversal
tip (where the traversal terminates once an existing bitmap is
found), and perform fill-in traversal.
3. Build up a complete bitmap of the wants side as usual, stopping any
time we intersect the (partial) haves side.
4. Return the results.
And is more-or-less equivalent to using the *old* algorithm with this
invocation:
$ git rev-list --objects --use-bitmap-index $WANTS --not \
$(git rev-list --objects --boundary $WANTS --not $HAVES |
perl -lne 'print $1 if /^-(.*)/')
The new result performs significantly better in many cases, particularly
when the distance from the boundary commit(s) to an existing bitmap is
shorter than the distance from (all of) the have tips to the nearest
bitmapped commit.
Note that when using the old bitmap traversal algorithm, the results can
be *slower* than without bitmaps! Under the new algorithm, the result is
computed faster with bitmaps than without (at the cost of over-counting
the true number of objects in a similar fashion as the non-bitmap
traversal):
# (Computing the number of tagged objects not on any branches
# without bitmaps).
$ time git rev-list --count --objects --tags --not --branches
20
real 0m1.388s
user 0m1.092s
sys 0m0.296s
# (Computing the same query using the old bitmap traversal).
$ time git rev-list --count --objects --tags --not --branches --use-bitmap-index
19
real 0m22.709s
user 0m21.628s
sys 0m1.076s
# (this commit)
$ time git.compile rev-list --count --objects --tags --not --branches --use-bitmap-index
19
real 0m1.518s
user 0m1.234s
sys 0m0.284s
The new algorithm is still slower than not using bitmaps at all, but it
is nearly a 15-fold improvement over the existing traversal.
In a more realistic setting (using my local copy of git.git), I can
observe a similar (if more modest) speed-up:
$ argv="--count --objects --branches --not --tags"
hyperfine \
-n 'no bitmaps' "git.compile rev-list $argv" \
-n 'existing traversal' "git.compile rev-list --use-bitmap-index $argv" \
-n 'boundary traversal' "git.compile -c pack.useBitmapBoundaryTraversal=true rev-list --use-bitmap-index $argv"
Benchmark 1: no bitmaps
Time (mean ± σ): 124.6 ms ± 2.1 ms [User: 103.7 ms, System: 20.8 ms]
Range (min … max): 122.6 ms … 133.1 ms 22 runs
Benchmark 2: existing traversal
Time (mean ± σ): 368.6 ms ± 3.0 ms [User: 325.3 ms, System: 43.1 ms]
Range (min … max): 365.1 ms … 374.8 ms 10 runs
Benchmark 3: boundary traversal
Time (mean ± σ): 167.6 ms ± 0.9 ms [User: 139.5 ms, System: 27.9 ms]
Range (min … max): 166.1 ms … 169.2 ms 17 runs
Summary
'no bitmaps' ran
1.34 ± 0.02 times faster than 'boundary traversal'
2.96 ± 0.05 times faster than 'existing traversal'
Here, the new algorithm is also still slower than not using bitmaps, but
represents a more than 2-fold improvement over the existing traversal in
a more modest example.
Since this algorithm was originally written (nearly a year and a half
ago, at the time of writing), the bitmap lookup table shipped, making
the new algorithm's result more competitive. A few other future
directions for improving bitmap traversal times beyond not using bitmaps
at all:
- Decrease the cost to decompress and OR together many bitmaps
together (particularly when enumerating the uninteresting side of
the walk). Here we could explore more efficient bitmap storage
techniques, like Roaring+Run and/or use SIMD instructions to speed
up ORing them together.
- Store pseudo-merge bitmaps, which could allow us to OR together
fewer "summary" bitmaps (which would also help with the above).
Helped-by: Jeff King <peff@peff.net>
Helped-by: Derrick Stolee <derrickstolee@github.com>
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The '--all' option of git-push built-in cmd support to push all branches
(refs under refs/heads) to remote. Under the usage, a user can easlily
work in some scenarios, for example, branches synchronization and batch
upload.
The '--all' was introduced for a long time, meanwhile, git supports to
customize the storage location under "refs/". when a new git user see
the usage like, 'git push origin --all', we might feel like we're
pushing _all_ the refs instead of just branches without looking at the
documents until we found the related description of it or '--mirror'.
To ensure compatibility, we cannot rename '--all' to another name
directly, one way is, we can try to add a new option '--heads' which be
identical with the functionality of '--all' to let the user understand
the meaning of representation more clearly. Actually, We've more or less
named options this way already, for example, in 'git-show-ref' and 'git
ls-remote'.
At the same time, we fix a related issue about the wrong help
information of '--all' option in code and add some test cases in
t5523, t5543 and t5583.
Signed-off-by: Teng Long <dyroneteng@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Earlier, 47cfc9bd (attr: add flag `--source` to work with tree-ish,
2023-01-14) taught "git check-attr" the "--source=<tree>" option to
allow it to read attribute files from a tree-ish, but did so only
for the command. Just like "check-attr" users wanted a way to use
attributes from a tree-ish and not from the working tree files,
users of other commands (like "git diff") would benefit from the
same.
Undo most of the UI change the commit made, while keeping the
internal logic to read attributes from a given tree-ish. Expose the
internal logic via a new "--attr-source=<tree>" command line option
given to "git", so that it can be used with any git command that
runs as part of the main git process.
Additionally, add an environment variable GIT_ATTR_SOURCE that is set
when --attr-source is passed in, so that subprocesses use the same value
for the attributes source tree.
Signed-off-by: John Cai <johncai86@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
There is $(git show -s --raw --pretty=format:%at HEAD) in this test
that is meant to grab the author time of the commit. We used to
have a bug in the command line option parser of the diff family of
commands, where "show -s --raw" was identical to "show -s".
With the "-s" bug fixed, "show -s --raw" would mean the same thing
as "show --raw", i.e. show the output from the diff machinery in the
"raw" format. And this test will start failing, so fix it before
that happens.
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Sergey Organov noticed and reported "--patch --no-patch --raw"
behaves differently from just "--raw". It turns out that there are
a few interesting bugs in the implementation and documentation.
* First, the documentation for "--no-patch" was unclear that it
could be read to mean "--no-patch" countermands an earlier
"--patch" but not other things. The intention of "--no-patch"
ever since it was introduced at d09cd15d (diff: allow --no-patch
as synonym for -s, 2013-07-16) was to serve as a synonym for
"-s", so "--raw --patch --no-patch" should have produced no
output, but it can be (mis)read to allow showing only "--raw"
output.
* Then the interaction between "-s" and other format options were
poorly implemented. Modern versions of Git uses one bit each to
represent formatting options like "--patch", "--stat" in a single
output_format word, but for historical reasons, "-s" also is
represented as another bit in the same word. This allows two
interesting bugs to happen, and we have both X-<.
(1) After setting a format bit, then setting NO_OUTPUT with "-s",
the code to process another "--<format>" option drops the
NO_OUTPUT bit to allow output to be shown again. However,
the code to handle "-s" only set NO_OUTPUT without unsetting
format bits set earlier, so the earlier format bit got
revealed upon seeing the second "--<format>" option. This is
the problem Sergey observed.
(2) After setting NO_OUTPUT with "-s", code to process
"--<format>" option can forget to unset NO_OUTPUT, leaving
the command still silent.
It is tempting to change the meaning of "--no-patch" to mean
"disable only the patch format output" and reimplement "-s" as "not
showing anything", but it would be an end-user visible change in
behavior. Let's fix the interactions of these bits to first make
"-s" work as intended.
The fix is conceptually very simple.
* Whenever we set DIFF_FORMAT_FOO because we saw the "--foo"
option (e.g. DIFF_FORMAT_RAW is set when the "--raw" option is
given), we make sure we drop DIFF_FORMAT_NO_OUTPUT. We forgot to
do so in some of the options and caused (2) above.
* When processing "-s" option, we should not just set
DIFF_FORMAT_NO_OUTPUT bit, but clear other DIFF_FORMAT_* bits.
We didn't do so and retained format bits set by options
previously seen, causing (1) above.
It is even more tempting to lose NO_OUTPUT bit and instead take
output_format word being 0 as its replacement, but that would break
the mechanism "git show" uses to default to "--patch" output, where
the distinction between telling the command to be silent with "-s"
and having no output format specified on the command line matters,
and an explicit output format given on the command line should not
be "combined" with the default "--patch" format.
So, while we cannot lose the NO_OUTPUT bit, as a follow-up work, we
may want to replace it with OPTION_GIVEN bit, and
* make "--patch", "--raw", etc. set DIFF_FORMAT_$format bit and
DIFF_FORMAT_OPTION_GIVEN bit on for each format. "--no-raw",
etc. will set off DIFF_FORMAT_$format bit but still record the
fact that we saw an option from the command line by setting
DIFF_FORMAT_OPTION_GIVEN bit.
* make "-s" (and its synonym "--no-patch") clear all other bits
and set only the DIFF_FORMAT_OPTION_GIVEN bit on.
which I suspect would make the code much cleaner without breaking
any end-user expectations.
Once that is in place, transitioning "--no-patch" to mean the
counterpart of "--patch", just like "--no-raw" only defeats an
earlier "--raw", would be quite simple at the code level. The
social cost of migrating the end-user expectations might be too
great for it to be worth, but at least the "GIVEN" bit clean-up
alone may be worth it.
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The array of dirstat_file contained in the dirstat_dir structure is
not freed after the processing ends. Unfortunately, the member that
points at the array, .files, is incremented as the gather_dirstat()
function recursively walks it, and this needs to be plugged by
remembering the beginning of the array before gather_dirstat() mucks
with it and freeing it after we are done.
We can mark t4047 as leak-free. t4000, which is marked as
leak-free, now can exercise dirstat in it, which will happen next.
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Tests in t2019-checkout-ambiguous-ref.sh redirect two invocations of
"git checkout" to files "stdout" and "stderr". Several assertions are
made using file "stderr". File "stdout", however, is unused.
Don't redirect standard output of "git checkout" to file "stdout" in
t2019-checkout-ambiguous-ref.sh to avoid creating unnecessary files.
Signed-off-by: Andrei Rybak <rybak.a.v@gmail.com>
Reviewed-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Three tests in file t1502-rev-parse-parseopt.sh use three redirections
with invocation of "git rev-parse --parseopt --". All three tests
redirect standard output to file "out" and file "spec" to standard
input. Two of the tests redirect standard output a second time to file
"actual", and the third test redirects standard error to file "err".
These tests check contents of files "actual" and "err", but don't use
the files named "out" for assertions. The two tests that redirect to
standard output twice might also be confusing to the reader.
Don't redirect standard output of "git rev-parse" to file "out" in
t1502-rev-parse-parseopt.sh to avoid creating unnecessary files.
Acked-by: Øystein Walle <oystwa@gmail.com>
Signed-off-by: Andrei Rybak <rybak.a.v@gmail.com>
Reviewed-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Test 'fsck error and recovery on invalid object type' in file
t1450-fsck.sh redirects output of a failing "git fsck" invocation to
files "out" and "err" to assert presence of error messages in the output
of the command. Commit 31deb28f5e (fsck: don't hard die on invalid
object types, 2021-10-01) changed the way assertions in this test are
performed. The test doesn't compare the whole standard error with
prepared file "err.expect" and it doesn't assert that standard output is
empty.
Don't create unused files "err.expect" and "out" in test 'fsck error and
recovery on invalid object type'.
Signed-off-by: Andrei Rybak <rybak.a.v@gmail.com>
Reviewed-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Three tests in t1300-config.sh check that "git config --get" barfs when
syntax errors are present in the config file. The tests redirect
standard output and standard error of "git config --get" to files,
"actual" and "error" correspondingly. They assert presence of an error
message in file "error". However, these tests don't use file "actual"
for assertions.
Don't redirect standard output of "git config --get" to file "actual" in
t1300-config.sh to avoid creating unnecessary files.
Signed-off-by: Andrei Rybak <rybak.a.v@gmail.com>
Reviewed-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Three tests in t1300-config.sh check that "git config --get" barfs when
the config file contains various syntax errors: key=value pair without
equals sign, broken section line, and broken value string. The sample
config files include a comment describing the kind of broken syntax.
This description seems to have been copy-pasted from the "broken section
line" sample to the other two samples.
Fix descriptions of broken config file syntax in samples used in
t1300-config.sh.
Signed-off-by: Andrei Rybak <rybak.a.v@gmail.com>
Reviewed-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Test 'credential config with partial URLs' in t0300-credentials.sh
contains three "git credential fill" invocations. For two of the
invocations, the test asserts presence or absence of string "yep" in the
standard output. For the third test it checks for an error message in
standard error.
Don't redirect standard output of "git credential" to file "stdout" in
t0300-credentials.sh to avoid creating an unnecessary file when only
standard error is checked.
Signed-off-by: Andrei Rybak <rybak.a.v@gmail.com>
Reviewed-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Mark strtok() and strtok_r() to be banned.
* tb/ban-strtok:
banned.h: mark `strtok()` and `strtok_r()` as banned
t/helper/test-json-writer.c: avoid using `strtok()`
t/helper/test-oidmap.c: avoid using `strtok()`
t/helper/test-hashmap.c: avoid using `strtok()`
string-list: introduce `string_list_setlen()`
string-list: multi-delimiter `string_list_split_in_place()`
The output given by "git blame" that attributes a line to contents
taken from the file specified by the "--contents" option shows it
differently from a line attributed to the working tree file.
* jk/blame-fake-commit-label:
blame: use different author name for fake commit generated by --contents
The character classifiers are supposed to allow passing EOF to them, a
negative value. It isn't part of any character class. Extend the tests
to cover that.
Signed-off-by: René Scharfe <l.s.r@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
If a filesystem-level corruption occurs in a .bitmap file, Git can react
poorly. This could take the form of a run-time error due to failing to
parse an EWAH bitmap or be more subtle such as returning the wrong set
of objects to a fetch or clone.
A natural first response to either of these kinds of errors is to run
'git fsck' to see if any files are corrupt. This currently ignores all
.bitmap files.
Add checks to 'git fsck' for all .bitmap files that are currently
associated with a multi-pack-index or pack file. Verify their checksums
using the hashfile API.
We iterate through all multi-pack-indexes and pack-files to be sure to
check all .bitmap files, not just the one that would be read by the
process. For example, a multi-pack-index bitmap overrules a pack-bitmap.
However, if the multi-pack-index is removed, the pack-bitmap may be
selected instead. Be thorough to include every file that could become
active in such a way. This includes checking files in alternates.
There is potential that we could extend this effort to check the
structure of the reachability bitmaps themselves, but it is very
expensive to do so. At minimum, it's as expensive as generating the
bitmaps in the first place, and that's assuming that we don't use the
trivial algorithm of verifying each bitmap individually. The trivial
algorithm will result in quadratic behavior (number of objects times
number of bitmapped commits) while the bitmap building operation
constructs a lattice of commits to build bitmaps incrementally and then
generate the final bitmaps from a subset of those commits.
If we were to extend 'git fsck' to check .bitmap file contents more
closely like this, then we would likely want to hide it behind an option
that signals the user is more willing to do expensive operations such as
this.
For testing, set up a repository with a pack-bitmap _and_ a
multi-pack-index bitmap. This requires some file movement to avoid
deleting the pack-bitmap during the repack that creates the
multi-pack-index bitmap. We can then verify that 'git fsck' is checking
all files, not just the "active" bitmap.
Signed-off-by: Derrick Stolee <derrickstolee@github.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
safe.bareRepository=explicit is a safer default mode of operation, since
it guards against the embedded bare repository attack [1]. Most end
users don't use bare repositories directly, so they should be able to
set safe.bareRepository=explicit, with the expectation that they can
reenable bare repositories by specifying GIT_DIR or --git-dir.
However, the user might use a tool that invokes Git on bare repositories
without setting GIT_DIR (e.g. "go mod" will clone bare repositories
[2]), so even if a user wanted to use safe.bareRepository=explicit, it
wouldn't be feasible until their tools learned to set GIT_DIR.
To make this transition easier, add a trace message to note when we
attempt to set up a bare repository without setting GIT_DIR. This allows
users and tool developers to audit which of their tools are problematic
and report/fix the issue. When they are sufficiently confident, they
would switch over to "safe.bareRepository=explicit".
Note that this uses trace2_data_string(), which isn't supported by the
"normal" GIT_TRACE2 target, only _EVENT or _PERF.
[1] https://lore.kernel.org/git/kl6lsfqpygsj.fsf@chooglen-macbookpro.roam.corp.google.com/
[2] https://go.dev/ref/mod
Signed-off-by: Glen Choo <chooglen@google.com>
Signed-off-by: Josh Steadmon <steadmon@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Add a test ensuring that the "wwwauth[]" field cannot be used to
inject malicious data into the credential helper stream.
Many of the credential helpers in contrib/credential read the
newline-delimited protocol stream one line at a time by repeatedly
calling fgets() into a fixed-size buffer.
This assumes that each line is no more than 1024 characters long, since
each iteration of the loop assumes that it is parsing starting at the
beginning of a new line in the stream. However, similar to a5bb10fd5e
(config: avoid fixed-sized buffer when renaming/deleting a section,
2023-04-06), if a line is longer than 1024 characters, a malicious actor
can embed another command within an existing line, bypassing the usual
checks introduced in 9a6bbee800 (credential: avoid writing values with
newlines, 2020-03-11).
As with the problem fixed in that commit, specially crafted input can
cause the helper to return the credential for the wrong host, letting an
attacker trick the victim into sending credentials for one host to
another.
Luckily, all parts of the credential helper protocol that are available
in a tagged release of Git are immune to this attack:
- "protocol" is restricted to known values, and is thus immune.
- "host" is immune because curl will reject hostnames that have a '='
character in them, which would be required to carry out this attack.
- "username" is immune, because the buffer characters to fill out the
first `fgets()` call would pollute the `username` field, causing the
credential helper to return nothing (because it would match a
username if present, and the username of the credential to be stolen
is likely not 1024 characters).
- "password" is immune because providing a password instructs
credential helpers to avoid filling credentials in the first place.
- "path" is similar to username; if present, it is not likely to match
any credential the victim is storing. It's also not enabled by
default; the victim would have to set credential.useHTTPPath
explicitly.
However, the new "wwwauth[]" field introduced via 5f2117b24f
(credential: add WWW-Authenticate header to cred requests, 2023-02-27)
can be used to inject data into the credential helper stream. For
example, running:
{
printf 'HTTP/1.1 401\r\n'
printf 'WWW-Authenticate: basic realm='
perl -e 'print "a" x 1024'
printf 'host=victim.com\r\n'
} | nc -Nlp 8080
in one terminal, and then:
git clone http://localhost:8080
in another would result in a line like:
wwwauth[]=basic realm=aaa[...]aaahost=victim.com
being sent to the credential helper. If we tweak that "1024" to align
our output with the helper's buffer size and the rest of the data on the
line, it can cause the helper to see "host=victim.com" on its own line,
allowing motivated attackers to exfiltrate credentials belonging to
"victim.com".
The below test demonstrates these failures and provides us with a test
to ensure that our fix is correct. That said, it has a couple of
shortcomings:
- it's in t0303, since that's the only mechanism we have for testing
random helpers. But that means nobody is going to run it under
normal circumstances.
- to get the attack right, it has to line up the stuffed name with the
buffer size, so we depend on the exact buffer size. I parameterized
it so it could be used to test other helpers, but in practice it's
not likely for anybody to do that.
Still, it's the best we can do, and will help us confirm the presence of
the problem (and our fixes) in the new few patches.
Co-authored-by: Jeff King <peff@peff.net>
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The email format does not allow blank lines in headers; detect such
input and report it as malformed and add a test for it.
Signed-off-by: Maxim Cournoyer <maxim.cournoyer@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Sometimes, adding a header different than CC or TO is desirable; for
example, when using Debbugs, it is best to use 'X-Debbugs-Cc' headers
to keep people in CC; this is an example use case enabled by the new
'--header-cmd' option.
The header unfolding logic is extracted to a subroutine so that it can
be reused; a test is added for coverage.
Signed-off-by: Maxim Cournoyer <maxim.cournoyer@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The file started out as a test for picks and reverts with renames, but
has been subsequently populated with all kinds of basic tests, in
accordance with its generic name. Adjust the description to reflect
that.
Signed-off-by: Oswald Buddenhagen <oswald.buddenhagen@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
When "gc" needs to retain unreachable objects, packing them into
cruft packs (instead of exploding them into loose object files) has
been offered as a more efficient option for some time. Now the use
of cruft packs has been made the default and no longer considered
an experimental feature.
* tb/enable-cruft-packs-by-default:
repository.h: drop unused `gc_cruft_packs`
builtin/gc.c: make `gc.cruftPacks` enabled by default
t/t9300-fast-import.sh: prepare for `gc --cruft` by default
t/t6500-gc.sh: add additional test cases
t/t6500-gc.sh: refactor cruft pack tests
t/t6501-freshen-objects.sh: prepare for `gc --cruft` by default
t/t5304-prune.sh: prepare for `gc --cruft` by default
builtin/gc.c: ignore cruft packs with `--keep-largest-pack`
builtin/repack.c: fix incorrect reference to '-C'
pack-write.c: plug a leak in stage_tmp_packfiles()
The "%GT" placeholder for the "--format" option of "git log" and
friends caused BUG() to trigger on a commit signed with an unknown
key, which has been corrected.
* jk/gpg-trust-level-fix:
gpg-interface: set trust level of missing key to "undefined"
The on-disk reverse index that allows mapping from the pack offset
to the object name for the object stored at the offset has been
enabled by default.
* tb/pack-revindex-on-disk:
t: invert `GIT_TEST_WRITE_REV_INDEX`
config: enable `pack.writeReverseIndex` by default
pack-revindex: introduce `pack.readReverseIndex`
pack-revindex: introduce GIT_TEST_REV_INDEX_DIE_ON_DISK
pack-revindex: make `load_pack_revindex` take a repository
t5325: mark as leak-free
pack-write.c: plug a leak in stage_tmp_packfiles()
The comment in parse_commit_date() claims that parse_timestamp() will
not walk past the end of the buffer we've been given, since it will hit
the newline at "eol" and stop. This is usually true, when dateptr
contains actual numbers to parse. But with a line like:
committer name <email> \n
with just whitespace, and no numbers, parse_timestamp() will consume
that newline as part of the leading whitespace, and we may walk past our
"tail" pointer (which itself is set from the "size" parameter passed in
to parse_commit_buffer()).
In practice this can't cause us to walk off the end of an array, because
we always add an extra NUL byte to the end of objects we load from disk
(as a defense against exactly this kind of bug). However, you can see
the behavior in action when "committer" is the final header (which it
usually is, unless there's an encoding) and the subject line can be
parsed as an integer. We walk right past the newline on the committer
line, as well as the "\n\n" separator, and mistake the subject for the
timestamp.
We can solve this by trimming the whitespace ourselves, making sure that
it has some non-whitespace to parse. Note that we need to be a bit
careful about the definition of "whitespace" here, as our isspace()
doesn't match exotic characters like vertical tab or formfeed. We can
work around that by checking for an actual number (see the in-code
comment). This is slightly more restrictive than the current code, but
in practice the results are either the same (we reject "foo" as "0", but
so would parse_timestamp()) or extremely unlikely even for broken
commits (parse_timestamp() would allow "\v123" as "123", but we'll now
make it "0").
I did also allow "-" here, which may be controversial, as we don't
currently support negative timestamps. My reasoning was two-fold. One,
the design of parse_timestamp() is such that we should be able to easily
switch it to handling signed values, and this otherwise creates a
hard-to-find gotcha that anybody doing that work would get tripped up
on. And two, the status quo is that we currently parse them, though the
result of course ends up as a very large unsigned value (which is likely
to just get clamped to "0" for display anyway, since our date routines
can't handle it).
The new test checks the commit parser (via "--until") for both vanilla
spaces and the vertical-tab case. I also added a test to check these
against the pretty-print formatter, which uses split_ident_line(). It's
not subject to the same bug, because it already insists that there be
one or more digits in the timestamp.
Helped-by: Phillip Wood <phillip.wood123@gmail.com>
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
To find the committer timestamp, we parse left-to-right looking for the
closing ">" of the email, and then expect the timestamp right after
that. But we've seen some broken cases in the wild where this fails, but
we _could_ find the timestamp with a little extra work. E.g.:
Name <Name<email>> 123456789 -0500
This means that features that rely on the committer timestamp, like
--since or --until, will treat the commit as happening at time 0 (i.e.,
1970).
This is doubly confusing because the pretty-print parser learned to
handle these in 03818a4a94 (split_ident: parse timestamp from end of
line, 2013-10-14). So printing them via "git show", etc, makes
everything look normal, but --until, etc are still broken (despite the
fact that that commit explicitly mentioned --until!).
So let's use the same trick as 03818a4a94: find the end of the line, and
parse back to the final ">". In theory we could use split_ident_line()
here, but it's actually a bit more strict. In particular, it requires a
valid time-zone token, too. That should be present, of course, but we
wouldn't want to break --until for cases that are working currently.
We might want to teach split_ident_line() to become more lenient there,
but it would require checking its many callers (since right now they can
assume that if date_start is non-NULL, so is tz_start).
So for now we'll just reimplement the same trick in the commit parser.
The test is in t4212, which already covers similar cases, courtesy of
03818a4a94. We'll just adjust the broken commit to munge both the author
and committer timestamps. Note that we could match (author|committer)
here, but alternation can't be used portably in sed. Since we wouldn't
expect to see ">" except as part of an ident line, we can just match
that character on any line.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
We wouldn't expect cat-file to fail here, but it's good practice to
avoid putting git on the upstream of a pipe, as we otherwise ignore its
exit code.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Geometric repacking ("git repack --geometric=<n>") in a repository
that borrows from an alternate object database had various corner
case bugs, which have been corrected.
* ps/fix-geom-repack-with-alternates:
repack: disable writing bitmaps when doing a local repack
repack: honor `-l` when calculating pack geometry
t/helper: allow chmtime to print verbosely without modifying mtime
pack-objects: extend test coverage of `--stdin-packs` with alternates
pack-objects: fix error when same packfile is included and excluded
pack-objects: fix error when packing same pack twice
pack-objects: split out `--stdin-packs` tests into separate file
repack: fix generating multi-pack-index with only non-local packs
repack: fix trying to use preferred pack in alternates
midx: fix segfault with no packs and invalid preferred pack
The sendemail-validate validate hook learned to pass the total
number of input files and where in the sequence each invocation is
via environment variables.
* rj/send-email-validate-hook-count-messages:
send-email: export patch counters in validate environment
The code to parse capability list for v0 on-wire protocol fell into
an infinite loop when a capability appears multiple times, which
has been corrected.
* jk/protocol-cap-parse-fix:
v0 protocol: use size_t for capability length/offset
t5512: test "ls-remote --heads --symref" filtering with v0 and v2
t5512: allow any protocol version for filtered symref test
t5512: add v2 support for "ls-remote --symref" test
v0 protocol: fix sha1/sha256 confusion for capabilities^{}
t5512: stop referring to "v1" protocol
v0 protocol: fix infinite loop when parsing multi-valued capabilities
Header clean-up.
* en/header-split-cache-h: (24 commits)
protocol.h: move definition of DEFAULT_GIT_PORT from cache.h
mailmap, quote: move declarations of global vars to correct unit
treewide: reduce includes of cache.h in other headers
treewide: remove double forward declaration of read_in_full
cache.h: remove unnecessary includes
treewide: remove cache.h inclusion due to pager.h changes
pager.h: move declarations for pager.c functions from cache.h
treewide: remove cache.h inclusion due to editor.h changes
editor: move editor-related functions and declarations into common file
treewide: remove cache.h inclusion due to object.h changes
object.h: move some inline functions and defines from cache.h
treewide: remove cache.h inclusion due to object-file.h changes
object-file.h: move declarations for object-file.c functions from cache.h
treewide: remove cache.h inclusion due to git-zlib changes
git-zlib: move declarations for git-zlib functions from cache.h
treewide: remove cache.h inclusion due to object-name.h changes
object-name.h: move declarations for object-name.c functions from cache.h
treewide: remove unnecessary cache.h inclusion
treewide: be explicit about dependence on mem-pool.h
treewide: be explicit about dependence on oid-array.h
...
Apply similar treatment as in the previous commit to remove usage of
`strtok()` from the "oidmap" test helper.
Each of the different commands that the "json-writer" helper accepts
pops the next space-delimited token from the current line and interprets
it as a string, integer, or double (with the exception of the very first
token, which is the command itself).
To accommodate this, split the line in place by the space character, and
pass the corresponding string_list to each of the specialized `get_s()`,
`get_i()`, and `get_d()` functions.
`get_i()` and `get_d()` are thin wrappers around `get_s()` that convert
their result into the appropriate type by either calling `strtol()` or
`strtod()`, respectively. In `get_s()`, we mark the token as "consumed"
by incrementing the `consumed_nr` counter, indicating how many tokens we
have read up to that point.
Because each of these functions needs the string-list parts, the number
of tokens consumed, and the line number, these three are wrapped up in
to a struct representing the line state.
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Apply similar treatment as in the previous commit to remove usage of
`strtok()` from the "oidmap" test helper.
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Avoid using the non-reentrant `strtok()` to separate the parts of each
incoming command. Instead of replacing it with `strtok_r()`, let's
instead use the more friendly pair of `string_list_split_in_place()` and
`string_list_remove_empty_items()`.
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Enhance `string_list_split_in_place()` to accept multiple characters as
delimiters instead of a single character.
Instead of using `strchr(2)` to locate the first occurrence of the given
delimiter character, `string_list_split_in_place_multi()` uses
`strcspn(2)` to move past the initial segment of characters comprised of
any characters in the delimiting set.
When only a single delimiting character is provided, `strpbrk(2)` (which
is implemented with `strcspn(2)`) has equivalent performance to
`strchr(2)`. Modern `strcspn(2)` implementations treat an empty
delimiter or the singleton delimiter as a special case and fall back to
calling strchrnul(). Both glibc[1] and musl[2] implement `strcspn(2)`
this way.
This change is one step to removing `strtok(2)` from the tree. Note that
`string_list_split_in_place()` is not a strict replacement for
`strtok()`, since it will happily turn sequential delimiter characters
into empty entries in the resulting string_list. For example:
string_list_split_in_place(&xs, "foo:;:bar:;:baz", ":;", -1)
would yield a string list of:
["foo", "", "", "bar", "", "", "baz"]
Callers that wish to emulate the behavior of strtok(2) more directly
should call `string_list_remove_empty_items()` after splitting.
To avoid regressions for the new multi-character delimter cases, update
t0063 in this patch as well.
[1]: https://sourceware.org/git/?p=glibc.git;a=blob;f=string/strcspn.c;hb=glibc-2.37#l35
[2]: https://git.musl-libc.org/cgit/musl/tree/src/string/strcspn.c?h=v1.2.3#n11
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
When the --contents option is used with git blame, and the contents of
the file have lines which can't be annotated by the history being
blamed, the user will see an author of "Not Committed Yet". This is
similar to the way blame handles working tree contents when blaming
without a revision.
This is slightly confusing since this data isn't the working copy and
while it is technically "not committed yet", its also coming from an
external file. Replace this author name with "External file
(--contents)" to better differentiate such lines from actual working
copy lines.
Suggested-by: Junio C Hamano <gitster@pobox.com>
Suggested-by: Glen Choo <chooglen@google.com>
Signed-off-by: Jacob Keller <jacob.keller@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
There are several tests in t1300-config.sh that validate failing
invocations of "git config". However, there are no tests that check
what happens when "git config" is asked to retrieve a value for a
missing key.
Add tests that check this for various combinations of "<section>.<key>"
and "<section>.<subsection>.<key>".
Signed-off-by: Andrei Rybak <rybak.a.v@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Tests "git config ignores pairs ..." in t1300-config.sh validate that
"git config" ignores various kinds of supplied pairs of environment
variables GIT_CONFIG_KEY_* GIT_CONFIG_VALUE_* depending on
GIT_CONFIG_COUNT. By "ignores" here we mean that "git config" abides by
the value of environment variable GIT_CONFIG_COUNT and doesn't use
key-value pairs outside of the supplied GIT_CONFIG_COUNT when trying to
produce a value for config key "pair.one".
These tests also validate that "git config" doesn't complain about
mismatched environment variables to standard error. This is validated
by redirecting the standard error to a file called "error" and asserting
that it is empty. However, two of these tests incorrectly redirect to
standard output while calling the file "error", and test 'git config
ignores pairs exceeding count' doesn't validate standard error at all.
Fix these tests by redirecting standard error to file "error" and
asserting its emptiness.
Signed-off-by: Andrei Rybak <rybak.a.v@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
There are two almost identical tests called 'git config ignores pairs
with zero count' in file t1300-config.sh. Drop the first of these and
keep the one that contains more assertions.
Signed-off-by: Andrei Rybak <rybak.a.v@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
hash.h depends upon and includes repository.h, due to the definition and
use of the_hash_algo (defined as the_repository->hash_algo). However,
most headers trying to include hash.h are only interested in the layout
of the structs like object_id. Move the parts of hash.h that do not
depend upon repository.h into a new file hash-ll.h (the "low level"
parts of hash.h), and adjust other files to use this new header where
the convenience inline functions aren't needed.
This allows hash.h and object.h to be fairly small, minimal headers. It
also exposes a lot of hidden dependencies on both path.h (which was
brought in by repository.h) and repository.h (which was previously
implicitly brought in by object.h), so also adjust other files to be
more explicit about what they depend upon.
Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
"git branch --format=..." and "git format-patch --format=..."
learns "--omit-empty" to hide refs that whose formatting result
becomes an empty string from the output.
* ow/ref-filter-omit-empty:
branch, for-each-ref, tag: add option to omit empty lines
"git archive" run from a subdirectory mishandled attributes and
paths outside the current directory.
* rs/archive-from-subdirectory-fixes:
archive: improve support for running in subdirectory
Git authentication with OAuth access token is supported by every popular
Git host including GitHub, GitLab and BitBucket [1][2][3]. Credential
helpers Git Credential Manager (GCM) and git-credential-oauth generate
OAuth credentials [4][5]. Following RFC 6749, the application prints a
link for the user to authorize access in browser. A loopback redirect
communicates the response including access token to the application.
For security, RFC 6749 recommends that OAuth response also includes
expiry date and refresh token [6]. After expiry, applications can use
the refresh token to generate a new access token without user
reauthorization in browser. GitLab and BitBucket set the expiry at two
hours [2][3]. (GitHub doesn't populate expiry or refresh token.)
However the Git credential protocol has no attribute to store the OAuth
refresh token (unrecognised attributes are silently discarded). This
means that the user has to regularly reauthorize the helper in browser.
On a browserless system, this is particularly intrusive, requiring a
second device.
Introduce a new attribute oauth_refresh_token. This is especially
useful when a storage helper and a read-only OAuth helper are configured
together. Recall that `credential fill` calls each helper until it has a
non-expired password.
```
[credential]
helper = storage # eg. cache or osxkeychain
helper = oauth
```
The OAuth helper can use the stored refresh token forwarded by
`credential fill` to generate a fresh access token without opening the
browser. See
https://github.com/hickford/git-credential-oauth/pull/3/files
for an implementation tested with this patch.
Add support for the new attribute to credential-cache. Eventually, I
hope to see support in other popular storage helpers.
Alternatives considered: ask helpers to store all unrecognised
attributes. This seems excessively complex for no obvious gain.
Helpers would also need extra information to distinguish between
confidential and non-confidential attributes.
Workarounds: GCM abuses the helper get/store/erase contract to store the
refresh token during credential *get* as the password for a fictitious
host [7] (I wrote this hack). This workaround is only feasible for a
monolithic helper with its own storage.
[1] https://github.blog/2012-09-21-easier-builds-and-deployments-using-git-over-https-and-oauth/
[2] https://docs.gitlab.com/ee/api/oauth2.html#access-git-over-https-with-access-token
[3] https://support.atlassian.com/bitbucket-cloud/docs/use-oauth-on-bitbucket-cloud/#Cloning-a-repository-with-an-access-token
[4] https://github.com/GitCredentialManager/git-credential-manager
[5] https://github.com/hickford/git-credential-oauth
[6] https://datatracker.ietf.org/doc/html/rfc6749#section-5.1
[7] 66b94e489a/src/shared/GitLab/GitLabHostProvider.cs (L207)
Signed-off-by: M Hickford <mirth.hickford@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
"git clone --local" stops copying from an original repository that
has symbolic links inside its $GIT_DIR; an error message when that
happens has been updated.
* gc/better-error-when-local-clone-fails-with-symlink:
clone: error specifically with --local and symlinked objects
The approxidate() API has been simplified by losing an extra
function that did the same thing as another one.
* rs/remove-approxidate-relative:
date: remove approxidate_relative()
The userdiff regexp patterns for various filetypes that are built
into the system have been updated to avoid triggering regexp errors
from UTF-8 aware regex engines.
* rs/userdiff-multibyte-regex:
userdiff: support regexec(3) with multi-byte support
To allow further flexibility in the Git hook, the SMTP header
information of the email which git-send-email intends to send, is now
passed as the 2nd argument to the sendemail-validate hook.
As an example, this can be useful for acting upon keywords in the
subject or specific email addresses.
Cc: Luben Tuikov <luben.tuikov@amd.com>
Cc: Junio C Hamano <gitster@pobox.com>
Cc: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Acked-by: Luben Tuikov <luben.tuikov@amd.com>
Signed-off-by: Michael Strawbridge <michael.strawbridge@amd.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
In check_signature(), we initialize the trust_level field to "-1", with
the idea that if gpg does not return a trust level at all (if there is
no signature, or if the signature is made by an unknown key), we'll
use that value. But this has two problems:
1. Since the field is an enum, it's up to the compiler to decide what
underlying storage to use, and it only has to fit the values we've
declared. So we may not be able to store "-1" at all. And indeed,
on my system (linux with gcc), the resulting enum is an unsigned
32-bit value, and -1 becomes 4294967295.
The difference may seem academic (and you even get "-1" if you pass
it to printf("%d")), but it means that code like this:
status |= sigc->trust_level < configured_min_trust_level;
does not necessarily behave as expected. This turns out not to be a
bug in practice, though, because we keep the "-1" only when gpg did
not report a signature from a known key, in which case the line
above:
status |= sigc->result != 'G';
would always set status to non-zero anyway. So only a 'G' signature
with no parsed trust level would cause a problem, which doesn't
seem likely to trigger (outside of unexpected gpg behavior).
2. When using the "%GT" format placeholder, we pass the value to
gpg_trust_level_to_str(), which complains that the value is out of
range with a BUG(). This behavior was introduced by 803978da49
(gpg-interface: add function for converting trust level to string,
2022-07-11). Before that, we just did a switch() on the enum, and
anything that wasn't matched would end up as the empty string.
Curiously, solving this by naively doing:
if (level < 0)
return "";
in that function isn't sufficient. Because of (1) above, the
compiler can (and does in my case) actually remove that conditional
as dead code!
We can solve both by representing this state as an enum value. We could
do this by adding a new "unknown" value. But this really seems to match
the existing "undefined" level well. GPG describes this as "Not enough
information for calculation".
We have tests in t7510 that trigger this case (verifying a signature
from a key that we don't have, and then checking various %G
placeholders), but they didn't notice the BUG() because we didn't look
at %GT for that case! Let's make sure we check all %G placeholders for
each case in the formatting tests.
The interesting ones here are "show unknown signature with custom
format" and "show lack of signature with custom format", both of which
would BUG() before, and now turn %GT into "undefined". Prior to
803978da49 they would have turned it into the empty string, but I think
saying "undefined" consistently is a reasonable outcome, and probably
makes life easier for anyone parsing the output (and any such parser had
to be ready to see "undefined" already).
The other modified tests produce the same output before and after this
patch, but now we're consistently checking both %G? and %GT in all of
them.
Signed-off-by: Jeff King <peff@peff.net>
Reported-by: Rolf Eike Beer <eb@emlix.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Back in 5b92477f89 (builtin/gc.c: conditionally avoid pruning objects
via loose, 2022-05-20), `git gc` learned the `--cruft` option and
`gc.cruftPacks` configuration to opt-in to writing cruft packs when
collecting or pruning unreachable objects.
Cruft packs were introduced with the merge in a50036da1a (Merge branch
'tb/cruft-packs', 2022-06-03). They address the problem of "loose object
explosions", where Git will write out many individual loose objects when
there is a large number of unreachable objects that have not yet aged
past `--prune=<date>`.
Instead of keeping track of those unreachable yet recent objects via
their loose object file's mtime, cruft packs collect all unreachable
objects into a single pack with a corresponding `*.mtimes` file that
acts as a table to store the mtimes of all unreachable objects. This
prevents the need to store unreachable objects as loose as they age out
of the repository, and avoids the problem of loose object explosions.
Beyond avoiding loose object explosions, cruft packs also act as a more
efficient mechanism to store unreachable objects as they age out of a
repository. This is because pairs of similar unreachable objects serve
as delta bases for one another.
In 5b92477f89, the feature was introduced as experimental. Since then,
GitHub has been running these patches in every repository generating
hundreds of millions of cruft packs along the way. The feature is
battle-tested, and avoids many pathological cases such as above. Users
who either run `git gc` manually, or via `git maintenance` can benefit
from having cruft packs.
As such, enable cruft pack generation to take place by default (by
making `gc.cruftPacks` have the default of "true" rather than "false).
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
In a similar fashion as previous commits, adjust the fast-import tests
to prepare for "git gc" generating a cruft pack by default.
This adjustment is slightly different, however. Instead of relying on us
writing out the objects loose, and then calling `git prune` to remove
them, t9300 needs to be prepared to drop objects that would be moved
into cruft packs.
To do this, we can combine the `git gc` invocation with `git prune` into
one `git gc --prune`, which handles pruning both loose objects, and
objects that would otherwise be written to a cruft pack.
Likely this pattern of "git gc && git prune" started all the way back in
03db4525d3 (Support gitlinks in fast-import., 2008-07-19), which
happened after deprecating `git gc --prune` in 9e7d501990 (builtin-gc.c:
deprecate --prune, it now really has no effect, 2008-05-09).
After `--prune` was un-deprecated in 58e9d9d472 (gc: make --prune useful
again by accepting an optional parameter, 2009-02-14), this script got a
handful of new "git gc && git prune" instances via via 4cedb78cb5
(fast-import: add input format tests, 2011-08-11). These could have been
`git gc --prune`, but weren't (likely taking after 03db4525d3).
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
In the last commit, we refactored some of the tests in t6500 to make
clearer when cruft packs will and won't be generated by `git gc`.
Add the remaining cases not covered by the previous patch into this one,
which enumerates all possible combinations of arguments that will
produce (or not produce) a cruft pack.
This prepares us for a future commit which will change the default value
of `gc.cruftPacks` by ensuring that we understand which invocations do
and do not change as a result.
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
In 12253ab6d0 (gc: add tests for --cruft and friends, 2022-10-26), we
added a handful of tests to t6500 to ensure that `git gc` respected the
value of `--cruft` and `gc.cruftPacks`.
Then, in c695592850 (config: let feature.experimental imply
gc.cruftPacks=true, 2022-10-26), another set of similar tests was added
to ensure that `feature.experimental` correctly implied enabling cruft
pack generation (or not).
These tests are similar and could be consolidated. Do so in this patch
to prepare for expanding the set of command-line invocations that enable
or disable writing cruft packs. This makes it possible to easily test
more combinations of arguments without being overly repetitive.
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
In a similar spirit as previous commits, prepare for `gc --cruft`
becoming the default by ensuring that the tests in t6501 explicitly
cover the case of freshening loose objects not using cruft packs.
We could run this test twice, once with `--cruft` and once with
`--no-cruft`, but doing so is unnecessary, since we already test object
rescuing, freshening, and dealing with corrupt parts of the unreachable
object graph extensively via t5329.
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Many of the tests in t5304 run `git gc`, and rely on its behavior that
unreachable-but-recent objects are written out loose. This is sensible,
since t5304 deals specifically with this kind of pruning.
If left unattended, however, this test would break when the default
behavior of a bare "git gc" is adjusted to generate a cruft pack by
default.
Ensure that these tests continue to work as-is (and continue to provide
coverage of loose object pruning) by passing `--no-cruft` explicitly.
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
When cruft packs were implemented, we never adjusted the code for `git
gc`'s `--keep-largest-pack` and `gc.bigPackThreshold` to ignore cruft
packs. This option and configuration option share a common
implementation, but including cruft packs is wrong in both cases:
- Running `git gc --keep-largest-pack` in a repository where the
largest pack is the cruft pack itself will make it impossible for
`git gc` to prune objects, since the cruft pack itself is kept.
- The same is true for `gc.bigPackThreshold`, if the size of the cruft
pack exceeds the limit set by the caller.
In the future, it is possible that `gc.bigPackThreshold` could be used
to write a separate cruft pack containing any new unreachable objects
that entered the repository since the last time a cruft pack was
written.
There are some complexities to doing so, mainly around handling
pruning objects that are in an existing cruft pack that is above the
threshold (which would either need to be rewritten, or else delay
pruning). Rewriting a substantially similar cruft pack isn't ideal, but
it is significantly better than the status-quo.
If users have large cruft packs that they don't want to rewrite, they
can mark them as `*.keep` packs. But in general, if a repository has a
cruft pack that is so large it is slowing down GC's, it should probably
be pruned anyway.
In the meantime, ignore cruft packs in the common implementation for
both of these options, and add a pair of tests to prevent any future
regressions here.
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Clean-up of the code path that deals with merge strategy option
handling in "git rebase".
* pw/rebase-cleanup-merge-strategy-option-handling:
rebase: remove a couple of redundant strategy tests
rebase -m: fix serialization of strategy options
rebase -m: cleanup --strategy-option handling
sequencer: use struct strvec to store merge strategy options
rebase: stop reading and writing unnecessary strategy state
"git mergetool" and "git difftool" learns a new configuration
guiDefault to optionally favor configured guitool over non-gui-tool
automatically when $DISPLAY is set.
* tk/mergetool-gui-default-config:
mergetool: new config guiDefault supports auto-toggling gui by DISPLAY
While parsing a .rev file, we check the header information to be sure it
makes sense. This happens before doing any additional validation such as
a checksum or value check. In order to differentiate between a bad
header and a non-existent file, we need to update the API for loading a
reverse index.
Make load_pack_revindex_from_disk() non-static and specify that a
positive value means "the file does not exist" while other errors during
parsing are negative values. Since an invalid header prevents setting up
the structures we would use for further validations, we can stop at that
point.
The place where we can distinguish between a missing file and a corrupt
file is inside load_revindex_from_disk(), which is used both by pack
rev-indexes and multi-pack-index rev-indexes. Some tests in t5326
demonstrate that it is critical to take some conditions to allow
positive error signals.
Add tests that check the three header values.
Signed-off-by: Derrick Stolee <derrickstolee@github.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
When checking a rev-index file, it may be helpful to identify exactly
which positions are incorrect. Compare the rev-index to a
freshly-computed in-memory rev-index and report the comparison failures.
This additional check (on top of the checksum validation) can help find
files that were corrupt by a single bit flip on-disk or perhaps were
written incorrectly due to a bug in Git.
Signed-off-by: Derrick Stolee <derrickstolee@github.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The previous change added calls to verify_pack_revindex() in
builtin/fsck.c, but the implementation of the method was left empty. Add
the first and most-obvious check to this method: checksum verification.
While here, create a helper method in the test script that makes it easy
to adjust the .rev file and check that 'git fsck' reports the correct
error message.
Signed-off-by: Derrick Stolee <derrickstolee@github.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The 'fsck' builtin checks many of Git's on-disk data structures, but
does not currently validate the pack rev-index files (a .rev file to
pair with a .pack and .idx file).
Before doing a more-involved check process, create the scaffolding
within builtin/fsck.c to have a new error type and add that error type
when the API method verify_pack_revindex() returns an error. That method
does nothing currently, but we will add checks to it in later changes.
For now, check that 'git fsck' succeeds without any errors in the normal
case. Future checks will be paired with tests that corrupt the .rev file
appropriately.
Signed-off-by: Derrick Stolee <derrickstolee@github.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
* maint-2.39: (34 commits)
Git 2.39.3
Git 2.38.5
Git 2.37.7
Git 2.36.6
Git 2.35.8
Makefile: force -O0 when compiling with SANITIZE=leak
Git 2.34.8
Git 2.33.8
Git 2.32.7
Git 2.31.8
tests: avoid using `test_i18ncmp`
Git 2.30.9
gettext: avoid using gettext if the locale dir is not present
apply --reject: overwrite existing `.rej` symlink if it exists
http.c: clear the 'finished' member once we are done with it
clone.c: avoid "exceeds maximum object size" error with GCC v12.x
t5604: GETTEXT_POISON fix, conclusion
t5604: GETTEXT_POISON fix, part 1
t5619: GETTEXT_POISON fix
range-diff: use ssize_t for parsed "len" in read_patches()
...
* maint-2.38: (32 commits)
Git 2.38.5
Git 2.37.7
Git 2.36.6
Git 2.35.8
Git 2.34.8
Git 2.33.8
Git 2.32.7
Git 2.31.8
tests: avoid using `test_i18ncmp`
Git 2.30.9
gettext: avoid using gettext if the locale dir is not present
apply --reject: overwrite existing `.rej` symlink if it exists
http.c: clear the 'finished' member once we are done with it
clone.c: avoid "exceeds maximum object size" error with GCC v12.x
range-diff: use ssize_t for parsed "len" in read_patches()
range-diff: handle unterminated lines in read_patches()
range-diff: drop useless "offset" variable from read_patches()
t5604: GETTEXT_POISON fix, conclusion
t5604: GETTEXT_POISON fix, part 1
t5619: GETTEXT_POISON fix
t0003: GETTEXT_POISON fix, conclusion
...
* maint-2.37: (31 commits)
Git 2.37.7
Git 2.36.6
Git 2.35.8
Git 2.34.8
Git 2.33.8
Git 2.32.7
Git 2.31.8
tests: avoid using `test_i18ncmp`
Git 2.30.9
gettext: avoid using gettext if the locale dir is not present
apply --reject: overwrite existing `.rej` symlink if it exists
http.c: clear the 'finished' member once we are done with it
clone.c: avoid "exceeds maximum object size" error with GCC v12.x
range-diff: use ssize_t for parsed "len" in read_patches()
range-diff: handle unterminated lines in read_patches()
range-diff: drop useless "offset" variable from read_patches()
t5604: GETTEXT_POISON fix, conclusion
t5604: GETTEXT_POISON fix, part 1
t5619: GETTEXT_POISON fix
t0003: GETTEXT_POISON fix, conclusion
t0003: GETTEXT_POISON fix, part 1
...
* maint-2.36: (30 commits)
Git 2.36.6
Git 2.35.8
Git 2.34.8
Git 2.33.8
Git 2.32.7
Git 2.31.8
tests: avoid using `test_i18ncmp`
Git 2.30.9
gettext: avoid using gettext if the locale dir is not present
apply --reject: overwrite existing `.rej` symlink if it exists
http.c: clear the 'finished' member once we are done with it
clone.c: avoid "exceeds maximum object size" error with GCC v12.x
range-diff: use ssize_t for parsed "len" in read_patches()
range-diff: handle unterminated lines in read_patches()
range-diff: drop useless "offset" variable from read_patches()
t5604: GETTEXT_POISON fix, conclusion
t5604: GETTEXT_POISON fix, part 1
t5619: GETTEXT_POISON fix
t0003: GETTEXT_POISON fix, conclusion
t0003: GETTEXT_POISON fix, part 1
t0033: GETTEXT_POISON fix
...
* maint-2.35: (29 commits)
Git 2.35.8
Git 2.34.8
Git 2.33.8
Git 2.32.7
Git 2.31.8
tests: avoid using `test_i18ncmp`
Git 2.30.9
gettext: avoid using gettext if the locale dir is not present
apply --reject: overwrite existing `.rej` symlink if it exists
http.c: clear the 'finished' member once we are done with it
clone.c: avoid "exceeds maximum object size" error with GCC v12.x
range-diff: use ssize_t for parsed "len" in read_patches()
range-diff: handle unterminated lines in read_patches()
range-diff: drop useless "offset" variable from read_patches()
t5604: GETTEXT_POISON fix, conclusion
t5604: GETTEXT_POISON fix, part 1
t5619: GETTEXT_POISON fix
t0003: GETTEXT_POISON fix, conclusion
t0003: GETTEXT_POISON fix, part 1
t0033: GETTEXT_POISON fix
http: support CURLOPT_PROTOCOLS_STR
...
* maint-2.34: (28 commits)
Git 2.34.8
Git 2.33.8
Git 2.32.7
Git 2.31.8
tests: avoid using `test_i18ncmp`
Git 2.30.9
gettext: avoid using gettext if the locale dir is not present
apply --reject: overwrite existing `.rej` symlink if it exists
http.c: clear the 'finished' member once we are done with it
clone.c: avoid "exceeds maximum object size" error with GCC v12.x
range-diff: use ssize_t for parsed "len" in read_patches()
range-diff: handle unterminated lines in read_patches()
range-diff: drop useless "offset" variable from read_patches()
t5604: GETTEXT_POISON fix, conclusion
t5604: GETTEXT_POISON fix, part 1
t5619: GETTEXT_POISON fix
t0003: GETTEXT_POISON fix, conclusion
t0003: GETTEXT_POISON fix, part 1
t0033: GETTEXT_POISON fix
http: support CURLOPT_PROTOCOLS_STR
http: prefer CURLOPT_SEEKFUNCTION to CURLOPT_IOCTLFUNCTION
...
* maint-2.33: (27 commits)
Git 2.33.8
Git 2.32.7
Git 2.31.8
tests: avoid using `test_i18ncmp`
Git 2.30.9
gettext: avoid using gettext if the locale dir is not present
apply --reject: overwrite existing `.rej` symlink if it exists
http.c: clear the 'finished' member once we are done with it
clone.c: avoid "exceeds maximum object size" error with GCC v12.x
range-diff: use ssize_t for parsed "len" in read_patches()
range-diff: handle unterminated lines in read_patches()
range-diff: drop useless "offset" variable from read_patches()
t5604: GETTEXT_POISON fix, conclusion
t5604: GETTEXT_POISON fix, part 1
t5619: GETTEXT_POISON fix
t0003: GETTEXT_POISON fix, conclusion
t0003: GETTEXT_POISON fix, part 1
t0033: GETTEXT_POISON fix
http: support CURLOPT_PROTOCOLS_STR
http: prefer CURLOPT_SEEKFUNCTION to CURLOPT_IOCTLFUNCTION
http-push: prefer CURLOPT_UPLOAD to CURLOPT_PUT
...
* maint-2.32: (26 commits)
Git 2.32.7
Git 2.31.8
tests: avoid using `test_i18ncmp`
Git 2.30.9
gettext: avoid using gettext if the locale dir is not present
apply --reject: overwrite existing `.rej` symlink if it exists
http.c: clear the 'finished' member once we are done with it
clone.c: avoid "exceeds maximum object size" error with GCC v12.x
range-diff: use ssize_t for parsed "len" in read_patches()
range-diff: handle unterminated lines in read_patches()
range-diff: drop useless "offset" variable from read_patches()
t5604: GETTEXT_POISON fix, conclusion
t5604: GETTEXT_POISON fix, part 1
t5619: GETTEXT_POISON fix
t0003: GETTEXT_POISON fix, conclusion
t0003: GETTEXT_POISON fix, part 1
t0033: GETTEXT_POISON fix
http: support CURLOPT_PROTOCOLS_STR
http: prefer CURLOPT_SEEKFUNCTION to CURLOPT_IOCTLFUNCTION
http-push: prefer CURLOPT_UPLOAD to CURLOPT_PUT
ci: install python on ubuntu
...
* maint-2.31: (25 commits)
Git 2.31.8
tests: avoid using `test_i18ncmp`
Git 2.30.9
gettext: avoid using gettext if the locale dir is not present
apply --reject: overwrite existing `.rej` symlink if it exists
http.c: clear the 'finished' member once we are done with it
clone.c: avoid "exceeds maximum object size" error with GCC v12.x
range-diff: use ssize_t for parsed "len" in read_patches()
range-diff: handle unterminated lines in read_patches()
range-diff: drop useless "offset" variable from read_patches()
t5604: GETTEXT_POISON fix, conclusion
t5604: GETTEXT_POISON fix, part 1
t5619: GETTEXT_POISON fix
t0003: GETTEXT_POISON fix, conclusion
t0003: GETTEXT_POISON fix, part 1
t0033: GETTEXT_POISON fix
http: support CURLOPT_PROTOCOLS_STR
http: prefer CURLOPT_SEEKFUNCTION to CURLOPT_IOCTLFUNCTION
http-push: prefer CURLOPT_UPLOAD to CURLOPT_PUT
ci: install python on ubuntu
ci: use the same version of p4 on both Linux and macOS
...
Since `test_i18ncmp` was deprecated in v2.31.*, the instances added in
v2.30.9 needed to be converted to `test_cmp` calls.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
* maint-2.30: (23 commits)
Git 2.30.9
gettext: avoid using gettext if the locale dir is not present
apply --reject: overwrite existing `.rej` symlink if it exists
http.c: clear the 'finished' member once we are done with it
clone.c: avoid "exceeds maximum object size" error with GCC v12.x
range-diff: use ssize_t for parsed "len" in read_patches()
range-diff: handle unterminated lines in read_patches()
range-diff: drop useless "offset" variable from read_patches()
t5604: GETTEXT_POISON fix, conclusion
t5604: GETTEXT_POISON fix, part 1
t5619: GETTEXT_POISON fix
t0003: GETTEXT_POISON fix, conclusion
t0003: GETTEXT_POISON fix, part 1
t0033: GETTEXT_POISON fix
http: support CURLOPT_PROTOCOLS_STR
http: prefer CURLOPT_SEEKFUNCTION to CURLOPT_IOCTLFUNCTION
http-push: prefer CURLOPT_UPLOAD to CURLOPT_PUT
ci: install python on ubuntu
ci: use the same version of p4 on both Linux and macOS
ci: remove the pipe after "p4 -V" to catch errors
github-actions: run gcc-8 on ubuntu-20.04 image
...
Avoids issues with renaming or deleting sections with long lines, where
configuration values may be interpreted as sections, leading to
configuration injection. Addresses CVE-2023-29007.
* tb/config-copy-or-rename-in-file-injection:
config.c: disallow overly-long lines in `copy_or_rename_section_in_file()`
config.c: avoid integer truncation in `copy_or_rename_section_in_file()`
config: avoid fixed-sized buffer when renaming/deleting a section
t1300: demonstrate failure when renaming sections with long lines
Signed-off-by: Taylor Blau <me@ttaylorr.com>
As a defense-in-depth measure to guard against any potentially-unknown
buffer overflows in `copy_or_rename_section_in_file()`, refuse to work
with overly-long lines in a gitconfig.
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Johannes Schindelin <Johannes.Schindelin@gmx.de>
When renaming (or deleting) a section of configuration, Git uses the
function `git_config_copy_or_rename_section_in_file()` to rewrite the
configuration file after applying the rename or deletion to the given
section.
To do this, Git repeatedly calls `fgets()` to read the existing
configuration data into a fixed size buffer.
When the configuration value under `old_name` exceeds the size of the
buffer, we will call `fgets()` an additional time even if there is no
newline in the configuration file, since our read length is capped at
`sizeof(buf)`.
If the first character of the buffer (after zero or more characters
satisfying `isspace()`) is a '[', Git will incorrectly treat it as
beginning a new section when the original section is being removed. In
other words, a configuration value satisfying this criteria can
incorrectly be considered as a new secftion instead of a variable in the
original section.
Avoid this issue by using a variable-width buffer in the form of a
strbuf rather than a fixed-with region on the stack. A couple of small
points worth noting:
- Using a strbuf will cause us to allocate arbitrary sizes to match
the length of each line. In practice, we don't expect any
reasonable configuration files to have lines that long, and a
bandaid will be introduced in a later patch to ensure that this is
the case.
- We are using strbuf_getwholeline() here instead of strbuf_getline()
in order to match `fgets()`'s behavior of leaving the trailing LF
character on the buffer (as well as a trailing NUL).
This could be changed later, but using strbuf_getwholeline() changes
the least about this function's implementation, so it is picked as
the safest path.
- It is temping to want to replace the loop to skip over characters
matching isspace() at the beginning of the buffer with a convenience
function like `strbuf_ltrim()`. But this is the wrong approach for a
couple of reasons:
First, it involves a potentially large and expensive `memmove()`
which we would like to avoid. Second, and more importantly, we also
*do* want to preserve those spaces to avoid changing the output of
other sections.
In all, this patch is a minimal replacement of the fixed-width buffer in
`git_config_copy_or_rename_section_in_file()` to instead use a `struct
strbuf`.
Reported-by: André Baptista <andre@ethiack.com>
Reported-by: Vítor Pinho <vitor@ethiack.com>
Helped-by: Patrick Steinhardt <ps@pks.im>
Co-authored-by: Johannes Schindelin <Johannes.Schindelin@gmx.de>
Signed-off-by: Johannes Schindelin <Johannes.Schindelin@gmx.de>
Signed-off-by: Taylor Blau <me@ttaylorr.com>
When renaming a configuration section which has an entry whose length
exceeds the size of our buffer in config.c's implementation of
`git_config_copy_or_rename_section_in_file()`, Git will incorrectly
form a new configuration section with part of the data in the section
being removed.
In this instance, our first configuration file looks something like:
[b]
c = d <spaces> [a] e = f
[a]
g = h
Here, we have two configuration values, "b.c", and "a.g". The value "[a]
e = f" belongs to the configuration value "b.c", and does not form its
own section.
However, when renaming the section 'a' to 'xyz', Git will write back
"[xyz]\ne = f", but "[xyz]" is still attached to the value of "b.c",
which is why "e = f" on its own line becomes a new entry called "b.e".
A slightly different example embeds the section being renamed within
another section.
Demonstrate this failure in a test in t1300, which we will fix in the
following commit.
Co-authored-by: Johannes Schindelin <Johannes.Schindelin@gmx.de>
Helped-by: Jeff King <peff@peff.net>
Signed-off-by: Johannes Schindelin <Johannes.Schindelin@gmx.de>
Signed-off-by: Taylor Blau <me@ttaylorr.com>
The `git apply --reject` is expected to write out `.rej` files in case
one or more hunks fail to apply cleanly. Historically, the command
overwrites any existing `.rej` files. The idea being that
apply/reject/edit cycles are relatively common, and the generated `.rej`
files are not considered precious.
But the command does not overwrite existing `.rej` symbolic links, and
instead follows them. This is unsafe because the same patch could
potentially create such a symbolic link and point at arbitrary paths
outside the current worktree, and `git apply` would write the contents
of the `.rej` file into that location.
Therefore, let's make sure that any existing `.rej` file or symbolic
link is removed before writing it.
Reported-by: RyotaK <ryotak.mail@gmail.com>
Helped-by: Taylor Blau <me@ttaylorr.com>
Helped-by: Junio C Hamano <gitster@pobox.com>
Helped-by: Linus Torvalds <torvalds@linuxfoundation.org>
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
We have two overlapping tests for checking the behavior of "ls-remote
--symref" when filtering output. The first test checks that using
"--heads" will omit the symref for HEAD (since we don't print anything
about HEAD at all), but still prints other symrefs.
This has been marked as expecting failure since it was added in
99c08d4eb2 (ls-remote: add support for showing symrefs, 2016-01-19).
That's because back then, we only had the v0 protocol, and it only
reported on the HEAD symref, not others. But these days we have v2,
which does exactly what the test wants. It would even have started
unexpectedly passing when we switched to v2 by default, except that
b2f73b70b2 (t5512: compensate for v0 only sending HEAD symrefs,
2019-02-25) over-zealously marked it to run only in v0 mode.
So let's run it with both protocol versions, and adjust the expected
output for each. It passes in v2 without modification. In v0 mode, we'll
drop the extra symref, but this is still testing something useful: it
ensures that we do omit HEAD.
The test after this checks "--heads" again, this time using the expected
v0 output. That's now redundant. It also checks that limiting with a
pattern like "refs/heads/*" works similarly, but that's redundant with a
test earlier in the script which limits by HEAD (again, back then the
"HEAD" test was less interesting because there were no other symrefs to
omit, but in a modern v2 world, there are). So we can just delete that
second test entirely.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
We have a test that checks that ls-remote, when asked only about HEAD,
will report the HEAD symref, and not others. This was marked to always
run with the v0 protocol by b2f73b70b2 (t5512: compensate for v0 only
sending HEAD symrefs, 2019-02-25).
But in v0 this test is doing nothing! For v0, upload-pack only reports
the HEAD symref anyway, so we'd never have any other symref to report.
For v2, it is useful; we learn about all symrefs (and the test repo has
multiple), so this demonstrates that we correctly avoid showing them.
We could perhaps mark this to test explicitly with v2, but since that is
the default these days, it's sufficient to just run ls-remote without
any protocol specification. It still passes if somebody does an explicit
GIT_TEST_PROTOCOL_VERSION=0; it's just testing less.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Commit b2f73b70b2 (t5512: compensate for v0 only sending HEAD symrefs,
2019-02-25) configured this test to always run with protocol v0, since
the output is different for v2.
But that means we are not getting any test coverage of the feature with
v2 at all. We could obviously switch to using and expecting v2, but then
that leaves v0 behind (and while we don't use it by default, it's still
important for testing interoperability with older servers). Likewise, we
could switch the expected output based on $GIT_TEST_PROTOCOL_VERSION,
but hardly anybody runs the tests for v0 these days.
Instead, let's explicitly run it for both protocol versions to make sure
they're well behaved. This matches other similar tests added later in
6a139cdd74 (ls-remote: pass heads/tags prefixes to transport,
2018-10-31), etc.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Commit eb398797cd (connect: advertized capability is not a ref,
2016-09-09) added support for an upload-pack server responding with:
0000000000000000000000000000000000000000 capabilities^{}
followed by a NUL and the actual capabilities. We correctly parse the
oid using the packet_reader's hash_algo field, but then we compare it to
null_oid(), which will instead use our current repo's default algorithm.
If we're defaulting to sha256 locally but the other side is sha1, they
won't match and we'll fail to parse the line (and thus die()).
This can cause a test failure when the suite is run with
GIT_TEST_DEFAULT_HASH=sha256, and we even do so regularly via the
linux-sha256 CI job. But since the test requires JGit to run, it's
usually just skipped, and nobody noticed the problem.
The reason the original patch used JGit is that Git itself does not ever
produce such a line via upload-pack; the feature was added to fix a
real-world problem when interacting with JGit. That was good for
verifying that the incompatibility was fixed, but it's not a good
regression test:
- hardly anybody runs it, because you have to have jgit installed;
hence this bug going unnoticed
- we're depending on jgit's behavior for the test to do anything
useful. In particular, this behavior is only relevant to the v0
protocol, but these days we ask for the v2 protocol by default. So
for modern jgit, this is probably testing nothing.
- it's complicated and slow. We had to do some fifo trickery to handle
races, and this one test makes up 40% of the runtime of the total
script.
Instead, let's just hard-code the response that's of interest to us.
That will test exactly what we want for every run, and reveals the bug
when run in sha256 mode. And of course we'll fix the actual bug by using
the correct hash_algo struct.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
There really isn't a "v1" Git protocol. It's just v0 with an extra probe
which we used to test compatibility in preparation for v2. Any tests
that are looking for before/after behavior for v2 really care about
"v0". Mentioning "v1" in these tests is just making things more
confusing, because we don't care about that probe; we're really testing
v0. So let's say so.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
If Git's client-side parsing of an upload-pack response (so git-fetch or
ls-remote) sees multiple instances of a single capability, it can enter
an infinite loop due to a bug in advancing the "offset" parameter in the
parser.
This bug can't happen between a client and server of the same Git
version. The client bug is in parse_feature_value() when the caller
passes in an offset parameter. And that only happens when the v0
protocol is parsing "symref" and "object-format" capabilities, via
next_server_feature_value(). But Git has never produced multiple
object-format capabilities, and it stopped producing multiple symref
values in d007dbf7d6 (Revert "upload-pack: send non-HEAD symbolic refs",
2013-11-18).
However, upload-pack did produce multiple symref entries for a while,
and they are valid. Plus other implementations, such as Dulwich will
still do so. So we should handle them. And even if we do not expect it,
it is obviously a bug for the parser to enter an infinite loop.
The bug itself is pretty simple. Commit 2c6a403d96 (connect: add
function to parse multiple v1 capability values, 2020-05-25) added the
"offset" parameter, which is used as both an in- and out-parameter. When
parsing the first "symref" capability, *offset will be 0 on input, and
after parsing the capability, we set *offset to an index just past the
value by taking a pointer difference "(value + end) - feature_list".
But on the second call, now *offset is set to that larger index, which
lets us skip past the first "symref" capability. However, we do so by
incrementing feature_list. That means our pointer difference is now too
small; it is counting from where we resumed parsing, not from the start
of the original feature_list pointer. And because we incremented
feature_list only inside our function, and not the caller, that
increment is lost next time the function is called.
One solution would be to account for those skipped bytes by incrementing
*offset, rather than assigning to it. But wait, there's more!
We also increment feature_list if we have a near-miss. Say we are
looking for "symref" and find "almost-symref". In that case we'll point
feature_list to the "y" in "almost-symref" and restart our search. But
that again means our offset won't be correct, as it won't account for
the bytes between the start of the string and that "y".
So instead, let's just record the beginning of the feature_list string
in a separate pointer that we never touch. That offset we take in and
return is meant to be using that point as a base, and now we'll do so
consistently.
Since the bug can't be reproduced using the current version of
git-upload-pack, we'll instead hard-code an input which triggers the
problem. Before this patch it loops forever re-parsing the second symref
entry. Now we check both that it finishes, and that it parses both
entries correctly (a case we could not test at all before).
We don't need to worry about testing v2 here; it communicates the
capabilities in a completely different way, and doesn't use this code at
all. There are tests earlier in t5512 that are meant to cover this (they
don't, but we'll address that in a future patch).
Reported-by: Jonas Haag <jonas@lophus.org>
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
When sending patch series (with a cover-letter or not)
sendemail-validate is called with every email/patch file independently
from the others. When one of the patches depends on a previous one, it
may not be possible to use this hook in a meaningful way. A hook that
wants to check some property of the whole series needs to know which
patch is the final one.
Expose the current and total number of patches to the hook via the
GIT_SENDEMAIL_PATCH_COUNTER and GIT_SENDEMAIL_PATCH_TOTAL environment
variables so that both incremental and global validation is possible.
Sharing any other state between successive invocations of the validate
hook must be done via external means. For example, by storing it in
a git config sendemail.validateWorktree entry.
Add a sample script with placeholder validations and update tests to
check that the counters are properly exported.
Suggested-by: Phillip Wood <phillip.wood123@gmail.com>
Signed-off-by: Robin Jarry <robin@jarry.cc>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
In order to write a bitmap, we need to have full coverage of all objects
that are about to be packed. In the traditional non-multi-pack-index
world this meant we need to do a full repack of all objects into a
single packfile. But in the new multi-pack-index world we can get away
with writing bitmaps when we have multiple packfiles as long as the
multi-pack-index covers all objects.
This is not always the case though. When asked to perform a repack of
local objects, only, then we cannot guarantee to have full coverage of
all objects regardless of whether we do a full repack or a repack with a
multi-pack-index. The end result is that writing the bitmap will fail in
both worlds:
$ git multi-pack-index write --stdin-packs --bitmap <packfiles
warning: Failed to write bitmap index. Packfile doesn't have full closure (object 1529341d78cf45377407369acb0f4ff2b5cdae42 is missing)
error: could not write multi-pack bitmap
Now there are two different ways to fix this. The first one would be to
amend git-multi-pack-index(1) to disable writing bitmaps when we notice
that we don't have full object coverage.
- We don't have enough information in git-multi-pack-index(1) in
order to tell whether the local repository _should_ have full
coverage. Because even when connected to an alternate object
directory, it may be the case that we still have all objects
around in the main object database.
- git-multi-pack-index(1) is quite a low-level tool. Automatically
disabling functionality that it was asked to provide does not feel
like the right thing to do.
We can easily fix it at a higher level in git-repack(1) though. When
asked to only include local objects via `-l` and when connected to an
alternate object directory then we will override the user's ask and
disable writing bitmaps with a warning. This is similar to what we do in
git-pack-objects(1), where we also disable writing bitmaps in case we
omit an object from the pack.
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
When the user passes `-l` to git-repack(1), then they essentially ask us
to only repack objects part of the local object database while ignoring
any packfiles part of an alternate object database. And we in fact honor
this bit when doing a geometric repack as the resulting packfile will
only ever contain local objects.
What we're missing though is that we don't take locality of packfiles
into account when computing whether the geometric sequence is intact or
not. So even though we would only ever roll up local packfiles anyway,
we could end up trying to repack because of non-local packfiles. This
does not make much sense, and in the worst case it can cause us to try
and do the geometric repack over and over again because we're never able
to restore the geometric sequence.
Fix this bug by honoring whether the user has passed `-l`. If so, we
skip adding any non-local packfiles to the pack geometry.
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The `test-tool chmtime` helper allows us to both read and modify the
modification time of files. But while it is possible to only read the
mtimes of a file via `--get`, it is not possible to read the mtimes
and report them together with their respective file paths via the
`--verbose` flag without also modifying the mtime at the same time.
Fix this so that it is possible to call `test-tool chmtime --verbose
<files>...` without modifying any mtimes.
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
We don't have any tests that verify that git-pack-objects(1) works with
`--stdin-packs` when combined with alternate object directories. Add
some to make sure that the basic functionality works as expected.
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
When passing the same packfile both as included and excluded via the
`--stdin-packs` option, then we will return an error because the
excluded packfile cannot be found. This is because we will only set the
`util` pointer for the included packfile list if it was found, so that
we later die when we notice that it's in fact not set for the excluded
packfile list.
Fix this bug by always setting the `util` pointer for both the included
and excluded list entries.
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
When passed the same packfile twice via `--stdin-packs` we return an
error that the packfile supposedly was not found. This is because when
reading packs into the list of included or excluded packfiles, we will
happily re-add packfiles even if they are part of the lists already. And
while the list can now contain duplicates, we will only set the `util`
pointer of the first list entry to the `packed_git` structure. We notice
that at a later point when checking that all list entries have their
`util` pointer set and die with an error.
While this is kind of a nonsensical request, this scenario can be hit
when doing geometric repacks. When a repository is connected to an
alternate object directory and both have the exact same packfile then
both would get added to the geometric sequence. And when we then decide
to perform the repack, we will invoke git-pack-objects(1) with the same
packfile twice.
Fix this bug by removing any duplicates from both the included and
excluded packs.
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The test suite for git-pack-objects(1) is quite huge, and we're about to
add more tests that relate to the `--stdin-packs` option. Split out all
tests related to this option into a standalone file so that it becomes
easier to test the feature in isolation.
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
When writing the multi-pack-index with geometric repacking we will add
all packfiles to the index that are part of the geometric sequence. This
can potentially also include packfiles borrowed from an alternate object
directory. But given that a multi-pack-index can only ever include packs
that are part of the main object database this does not make much sense
whatsoever.
In the edge case where all packfiles are contained in the alternate
object database and the local repository has none itself this bug can
cause us to invoke git-multi-pack-index(1) with only non-local packfiles
that it ultimately cannot find. This causes it to return an error and
thus causes the geometric repack to fail.
Fix the code to skip non-local packfiles.
Co-authored-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
When doing a geometric repack with multi-pack-indices, then we ask
git-multi-pack-index(1) to use the largest packfile as the preferred
pack. It can happen though that the largest packfile is not part of the
main object database, but instead part of an alternate object database.
The result is that git-multi-pack-index(1) will not be able to find the
preferred pack and print a warning. It then falls back to use the first
packfile that the multi-pack-index shall reference.
Fix this bug by only considering packfiles as preferred pack that are
local. This is the right thing to do given that a multi-pack-index
should never reference packfiles borrowed from an alternate.
While at it, rename the function `get_largest_active_packfile()` to
`get_preferred_pack()` to better document its intent.
Helped-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
When asked to write a multi-pack-index the user can specify a preferred
pack that is used as a tie breaker when multiple packs contain the same
objects. When this packfile cannot be found, we just pick the first pack
that is getting tracked by the newly written multi-pack-index as a
fallback.
Picking the fallback can fail in the case where we're asked to write a
multi-pack-index with no packfiles at all: picking the fallback value
will cause a segfault as we blindly index into the array of packfiles,
which would be empty.
Fix this bug by resetting the preferred packfile index to `-1` before
searching for the preferred pack. This fixes the segfault as we already
check for whether the index is `> - 1`. If it is not, we simply don't
pick a preferred packfile at all.
Helped-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
If the given format string expands to the empty string, a newline is
still printed. This makes using the output linewise more tedious. For
example, git update-ref --stdin does not accept empty lines.
Add options to "git branch", "git for-each-ref", and "git tag" to
not print these empty lines. The default behavior remains the same.
Signed-off-by: Øystein Walle <oystwa@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Back in e8c58f894b (t: support GIT_TEST_WRITE_REV_INDEX, 2021-01-25), we
added a test knob to conditionally enable writing a ".rev" file when
indexing a pack. At the time, this was used to ensure that the test
suite worked even when ".rev" files were written, which served as a
stress-test for the on-disk reverse index implementation.
Now that reading from on-disk ".rev" files is enabled by default, the
test knob `GIT_TEST_WRITE_REV_INDEX` no longer has any meaning.
We could get rid of the option entirely, but there would be no
convenient way to test Git when ".rev" files *aren't* in place.
Instead of getting rid of the option, invert its meaning to instead
disable writing ".rev" files, thereby running the test suite in a mode
where the reverse index is generated from scratch.
This ensures that, when GIT_TEST_NO_WRITE_REV_INDEX is set to some
spelling of "true", we are still running and exercising Git's behavior
when forced to generate reverse indexes from scratch. Do so by setting
it in the linux-TEST-vars CI run to ensure that we are maintaining good
coverage of this now-legacy code.
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Acked-by: Derrick Stolee <derrickstolee@github.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Back in e37d0b8730 (builtin/index-pack.c: write reverse indexes,
2021-01-25), Git learned how to read and write a pack's reverse index
from a file instead of in-memory.
A pack's reverse index is a mapping from pack position (that is, the
order that objects appear together in a ".pack") to their position in
lexical order (that is, the order that objects are listed in an ".idx"
file).
Reverse indexes are consulted often during pack-objects, as well as
during auxiliary operations that require mapping between pack offsets,
pack order, and index index.
They are useful in GitHub's infrastructure, where we have seen a
dramatic increase in performance when writing ".rev" files[1]. In
particular:
- an ~80% reduction in the time it takes to serve fetches on a popular
repository, Homebrew/homebrew-core.
- a ~60% reduction in the peak memory usage to serve fetches on that
same repository.
- a collective savings of ~35% in CPU time across all pack-objects
invocations serving fetches across all repositories in a single
datacenter.
Reverse indexes are also beneficial to end-users as well as forges. For
example, the time it takes to generate a pack containing the objects for
the 10 most recent commits in linux.git (representing a typical push) is
significantly faster when on-disk reverse indexes are available:
$ { git rev-parse HEAD && printf '^' && git rev-parse HEAD~10 } >in
$ hyperfine -L v false,true 'git.compile -c pack.readReverseIndex={v} pack-objects --delta-base-offset --revs --stdout <in >/dev/null'
Benchmark 1: git.compile -c pack.readReverseIndex=false pack-objects --delta-base-offset --revs --stdout <in >/dev/null
Time (mean ± σ): 543.0 ms ± 20.3 ms [User: 616.2 ms, System: 58.8 ms]
Range (min … max): 521.0 ms … 577.9 ms 10 runs
Benchmark 2: git.compile -c pack.readReverseIndex=true pack-objects --delta-base-offset --revs --stdout <in >/dev/null
Time (mean ± σ): 245.0 ms ± 11.4 ms [User: 335.6 ms, System: 31.3 ms]
Range (min … max): 226.0 ms … 259.6 ms 13 runs
Summary
'git.compile -c pack.readReverseIndex=true pack-objects --delta-base-offset --revs --stdout <in >/dev/null' ran
2.22 ± 0.13 times faster than 'git.compile -c pack.readReverseIndex=false pack-objects --delta-base-offset --revs --stdout <in >/dev/null'
The same is true of writing a pack containing the objects for the 30
most-recent commits:
$ { git rev-parse HEAD && printf '^' && git rev-parse HEAD~30 } >in
$ hyperfine -L v false,true 'git.compile -c pack.readReverseIndex={v} pack-objects --delta-base-offset --revs --stdout <in >/dev/null'
Benchmark 1: git.compile -c pack.readReverseIndex=false pack-objects --delta-base-offset --revs --stdout <in >/dev/null
Time (mean ± σ): 866.5 ms ± 16.2 ms [User: 1414.5 ms, System: 97.0 ms]
Range (min … max): 839.3 ms … 886.9 ms 10 runs
Benchmark 2: git.compile -c pack.readReverseIndex=true pack-objects --delta-base-offset --revs --stdout <in >/dev/null
Time (mean ± σ): 581.6 ms ± 10.2 ms [User: 1181.7 ms, System: 62.6 ms]
Range (min … max): 567.5 ms … 599.3 ms 10 runs
Summary
'git.compile -c pack.readReverseIndex=true pack-objects --delta-base-offset --revs --stdout <in >/dev/null' ran
1.49 ± 0.04 times faster than 'git.compile -c pack.readReverseIndex=false pack-objects --delta-base-offset --revs --stdout <in >/dev/null'
...and savings on trivial operations like computing the on-disk size of
a single (packed) object are even more dramatic:
$ git rev-parse HEAD >in
$ hyperfine -L v false,true 'git.compile -c pack.readReverseIndex={v} cat-file --batch-check="%(objectsize:disk)" <in'
Benchmark 1: git.compile -c pack.readReverseIndex=false cat-file --batch-check="%(objectsize:disk)" <in
Time (mean ± σ): 305.8 ms ± 11.4 ms [User: 264.2 ms, System: 41.4 ms]
Range (min … max): 290.3 ms … 331.1 ms 10 runs
Benchmark 2: git.compile -c pack.readReverseIndex=true cat-file --batch-check="%(objectsize:disk)" <in
Time (mean ± σ): 4.0 ms ± 0.3 ms [User: 1.7 ms, System: 2.3 ms]
Range (min … max): 1.6 ms … 4.6 ms 1155 runs
Summary
'git.compile -c pack.readReverseIndex=true cat-file --batch-check="%(objectsize:disk)" <in' ran
76.96 ± 6.25 times faster than 'git.compile -c pack.readReverseIndex=false cat-file --batch-check="%(objectsize:disk)" <in'
In the more than two years since e37d0b8730 was merged, Git's
implementation of on-disk reverse indexes has been thoroughly tested,
both from users enabling `pack.writeReverseIndexes`, and from GitHub's
deployment of the feature. The latter has been running without incident
for more than two years.
This patch changes Git's behavior to write on-disk reverse indexes by
default when indexing a pack, which should make the above operations
faster for everybody's Git installation after a repack.
(The previous commit explains some potential drawbacks of using on-disk
reverse indexes in certain limited circumstances, that essentially boil
down to a trade-off between time to generate, and time to access. For
those limited cases, the `pack.readReverseIndex` escape hatch can be
used).
[1]: https://github.blog/2021-04-29-scaling-monorepo-maintenance/#reverse-indexes
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Acked-by: Derrick Stolee <derrickstolee@github.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Since 1615c567b8 (Documentation/config/pack.txt: advertise
'pack.writeReverseIndex', 2021-01-25), we have had the
`pack.writeReverseIndex` configuration option, which tells Git whether
or not it is allowed to write a ".rev" file when indexing a pack.
Introduce a complementary configuration knob, `pack.readReverseIndex` to
control whether or not Git will read any ".rev" file(s) that may be
available on disk.
This option is useful for debugging, as well as disabling the effect of
".rev" files in certain instances.
This is useful because of the trade-off[^1] between the time it takes to
generate a reverse index (slow from scratch, fast when reading an
existing ".rev" file), and the time it takes to access a record (the
opposite).
For example, even though it is faster to use the on-disk reverse index
when computing the on-disk size of a packed object, it is slower to
enumerate the same value for all objects.
Here are a couple of examples from linux.git. When computing the above
for a single object, using the on-disk reverse index is significantly
faster:
$ git rev-parse HEAD >in
$ hyperfine -L v false,true 'git.compile -c pack.readReverseIndex={v} cat-file --batch-check="%(objectsize:disk)" <in'
Benchmark 1: git.compile -c pack.readReverseIndex=false cat-file --batch-check="%(objectsize:disk)" <in
Time (mean ± σ): 302.5 ms ± 12.5 ms [User: 258.7 ms, System: 43.6 ms]
Range (min … max): 291.1 ms … 328.1 ms 10 runs
Benchmark 2: git.compile -c pack.readReverseIndex=true cat-file --batch-check="%(objectsize:disk)" <in
Time (mean ± σ): 3.9 ms ± 0.3 ms [User: 1.6 ms, System: 2.4 ms]
Range (min … max): 2.0 ms … 4.4 ms 801 runs
Summary
'git.compile -c pack.readReverseIndex=true cat-file --batch-check="%(objectsize:disk)" <in' ran
77.29 ± 7.14 times faster than 'git.compile -c pack.readReverseIndex=false cat-file --batch-check="%(objectsize:disk)" <in'
, but when instead trying to compute the on-disk object size for all
objects in the repository, using the ".rev" file is a disadvantage over
creating the reverse index from scratch:
$ hyperfine -L v false,true 'git.compile -c pack.readReverseIndex={v} cat-file --batch-check="%(objectsize:disk)" --batch-all-objects'
Benchmark 1: git.compile -c pack.readReverseIndex=false cat-file --batch-check="%(objectsize:disk)" --batch-all-objects
Time (mean ± σ): 8.258 s ± 0.035 s [User: 7.949 s, System: 0.308 s]
Range (min … max): 8.199 s … 8.293 s 10 runs
Benchmark 2: git.compile -c pack.readReverseIndex=true cat-file --batch-check="%(objectsize:disk)" --batch-all-objects
Time (mean ± σ): 16.976 s ± 0.107 s [User: 16.706 s, System: 0.268 s]
Range (min … max): 16.839 s … 17.105 s 10 runs
Summary
'git.compile -c pack.readReverseIndex=false cat-file --batch-check="%(objectsize:disk)" --batch-all-objects' ran
2.06 ± 0.02 times faster than 'git.compile -c pack.readReverseIndex=true cat-file --batch-check="%(objectsize:disk)" --batch-all-objects'
Luckily, the results when running `git cat-file` with `--unordered` are
closer together:
$ hyperfine -L v false,true 'git.compile -c pack.readReverseIndex={v} cat-file --unordered --batch-check="%(objectsize:disk)" --batch-all-objects'
Benchmark 1: git.compile -c pack.readReverseIndex=false cat-file --unordered --batch-check="%(objectsize:disk)" --batch-all-objects
Time (mean ± σ): 5.066 s ± 0.105 s [User: 4.792 s, System: 0.274 s]
Range (min … max): 4.943 s … 5.220 s 10 runs
Benchmark 2: git.compile -c pack.readReverseIndex=true cat-file --unordered --batch-check="%(objectsize:disk)" --batch-all-objects
Time (mean ± σ): 6.193 s ± 0.069 s [User: 5.937 s, System: 0.255 s]
Range (min … max): 6.145 s … 6.356 s 10 runs
Summary
'git.compile -c pack.readReverseIndex=false cat-file --unordered --batch-check="%(objectsize:disk)" --batch-all-objects' ran
1.22 ± 0.03 times faster than 'git.compile -c pack.readReverseIndex=true cat-file --unordered --batch-check="%(objectsize:disk)" --batch-all-objects'
Because the equilibrium point between these two is highly machine- and
repository-dependent, allow users to configure whether or not they will
read any ".rev" file(s) with this configuration knob.
[^1]: Generating a reverse index in memory takes O(N) time (where N is
the number of objects in the repository), since we use a radix sort.
Reading an entry from an on-disk ".rev" file is slower since each
operation is bound by disk I/O instead of memory I/O.
In order to compute the on-disk size of a packed object, we need to
find the offset of our object, and the adjacent object (the on-disk
size difference of these two). Finding the first offset requires a
binary search. Finding the latter involves a single .rev lookup.
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Acked-by: Derrick Stolee <derrickstolee@github.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This test is leak-free as of the previous commit, so let's mark it as
such to ensure we don't regress and introduce a leak in the future.
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Acked-by: Derrick Stolee <derrickstolee@github.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Tests had a few places where we ignored PERL_PATH and blindly used
/usr/bin/perl, which have been corrected.
* jk/use-perl-path-consistently:
t/lib-httpd: pass PERL_PATH to CGI scripts
"git clone" from an empty repository learned to propagate the
choice of the hash algorithm from the source repository to the
newly created repository.
* jc/clone-object-format-from-void:
clone: propagate object-format when cloning from void
Consistently spell "Message-ID" as such, not "Message-Id".
* jc/spell-id-in-both-caps-in-message-id:
e-mail workflow: Message-ID is spelled with ID in both capital letters
"git sparse-checkout" command learns a debugging aid for the sparse
rule definitions.
* ws/sparse-check-rules:
builtin/sparse-checkout: add check-rules command
builtin/sparse-checkout: remove NEED_WORK_TREE flag
Several files were including cache.h solely to get other headers, such
as trace.h and trace2.h. Since the last few commits have modified
files to make these dependencies more explicit, the inclusion of cache.h
is no longer needed in several cases. Remove it.
Signed-off-by: Elijah Newren <newren@gmail.com>
Acked-by: Calvin Wan <calvinwan@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Dozens of files made use of trace and trace2 functions, without
explicitly including trace.h or trace2.h. This made it more difficult
to find which files could remove a dependence on cache.h. Make C files
explicitly include trace.h or trace2.h if they are using them.
Signed-off-by: Elijah Newren <newren@gmail.com>
Acked-by: Calvin Wan <calvinwan@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
6f054f9fb3 (builtin/clone.c: disallow --local clones with
symlinks, 2022-07-28) gives a good error message when "git clone
--local" fails when the repo to clone has symlinks in
"$GIT_DIR/objects". In bffc762f87 (dir-iterator: prevent top-level
symlinks without FOLLOW_SYMLINKS, 2023-01-24), we later extended this
restriction to the case where "$GIT_DIR/objects" is itself a symlink,
but we didn't update the error message then - bffc762f87's tests show
that we print a generic "failed to start iterator over" message.
This is exacerbated by the fact that Documentation/git-clone.txt
mentions neither restriction, so users are left wondering if this is
intentional behavior or not.
Fix this by adding a check to builtin/clone.c: when doing a local clone,
perform an extra check to see if "$GIT_DIR/objects" is a symlink, and if
so, assume that that was the reason for the failure and report the
relevant information. Ideally, dir_iterator_begin() would tell us that
the real failure reason is the presence of the symlink, but (as far as I
can tell) there isn't an appropriate errno value for that.
Also, update Documentation/git-clone.txt to reflect that this
restriction exists.
Signed-off-by: Glen Choo <chooglen@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Test 'loosely defined local base branch is reported correctly' in
t2024-checkout-dwim.sh, which was introduced in [1] compares output of
two invocations of "git checkout", invoked with two different branches
named "strict" and "loose". As per description in [1], the test is
validating that output of tracking information for these two branches.
This tracking information is printed to standard output:
Your branch is behind 'main' by 1 commit, and can be fast-forwarded.
(use "git pull" to update your local branch)
The test assumes that the names of the two branches (strict and loose)
are in that output, and pipes the output through sed to replace names of
the branches with "BRANCHNAME". Command "git checkout", however,
outputs the branch name to standard error, not standard output -- see
message "Switched to branch '%s'\n" in function "update_refs_for_switch"
in "builtin/checkout.c". This means that the two invocations of sed do
nothing.
Redirect both the standard output and the standard error of "git
checkout" for these assertions. Ensure that compared files have the
string "BRANCHNAME".
In a series of piped commands, only the return code of the last command
is used. Thus, all other commands will have their return codes masked.
Avoid piping of output of git directly into sed to preserve the exit
status code of "git checkout", while we're here.
[1] 05e73682cd (checkout: report upstream correctly even with loosely
defined branch.*.merge, 2014-10-14)
Signed-off-by: Andrei Rybak <rybak.a.v@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Remove a test in t3402 that has been redundant ever since 80ff47957b
(rebase: remember strategy and strategy options, 2011-02-06). That
commit added a new test, the first part of which (as noted in the old
commit message) duplicated an existing test.
Also remove a test t3418 that has been redundant since the merge backend
was removed in 68aa495b59 (rebase: implement --merge via the interactive
machinery, 2018-12-11), since it now tests the same code paths as the
preceding test.
Helped-by: Elijah Newren <newren@gmail.com>
Reviewed-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Phillip Wood <phillip.wood@dunelm.org.uk>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
To store the strategy options rebase prepends " --" to each one and
writes them to a file. To load them it reads the file and passes the
contents to split_cmdline(). This roughly mimics the behavior of the
scripted rebase but has a couple of limitations, (1) options containing
whitespace are not properly preserved (this is true of the scripted
rebase as well) and (2) options containing '"' or '\' are incorrectly
parsed and may cause the parser to return an error.
Fix these limitations by quoting each option when they are stored so
that they can be parsed correctly. Now that "--preserve-merges" no
longer exist this change also stops prepending "--" to the options when
they are stored as that was an artifact of the scripted rebase.
These changes are backwards compatible so the files written by an older
version of git can still be read. They are also forwards compatible,
the file can still be parsed by recent versions of git as they treat the
"--" prefix as optional.
Reviewed-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Phillip Wood <phillip.wood@dunelm.org.uk>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
When handling "--strategy-option" rebase collects the commands into a
struct string_list, then concatenates them into a string, prepending "--"
to each one before splitting the string and removing the "--" prefix.
This is an artifact of the scripted rebase and the need to support
"rebase --preserve-merges". Now that "--preserve-merges" no-longer
exists we can cleanup the way the argument is handled.
The tests for a bad strategy option are adjusted now that
parse_strategy_opts() is no-longer called when starting a rebase. The
fact that it only errors out when running "git rebase --continue" is a
mixed blessing but the next commit will fix the root cause of the
parsing problem so lets not worry about that here.
Reviewed-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Phillip Wood <phillip.wood@dunelm.org.uk>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
