Rewrite of the "git bisect" script in C continues.
* mr/bisect-in-c-2:
bisect--helper: reimplement `bisect_next` and `bisect_auto_next` shell functions in C
bisect: call 'clear_commit_marks_all()' in 'bisect_next_all()'
bisect--helper: reimplement `bisect_autostart` shell function in C
bisect--helper: introduce new `write_in_file()` function
bisect--helper: use '-res' in 'cmd_bisect__helper' return
bisect--helper: BUG() in cmd_*() on invalid subcommand
"git bisect start X Y", when X and Y are not valid committish
object names, should take X and Y as pathspec, but didn't.
* cc/bisect-start-fix:
bisect: don't use invalid oid as rev when starting
"git blame --ignore-rev/--ignore-revs-file" failed to validate
their input are valid revision, and failed to take into account
that the user may want to give an annotated tag instead of a
commit, which has been corrected.
* jc/blame-ignore-fix:
blame: validate and peel the object names on the ignore list
t8013: minimum preparatory clean-up
Compilation fix around type punning.
* jk/drop-unaligned-loads:
Revert "fast-export: use local array to store anonymized oid"
bswap.h: drop unaligned loads
The installation procedure learned to optionally omit "git-foo"
executable files for each 'foo' built-in subcommand, which are only
required by old timers that still rely on the age old promise that
prepending "git --exec-path" output to PATH early in their script
will keep the "git-foo" calls they wrote working.
The old attempt to remove these executables from the disk failed in
the 1.6 era; it may be worth attempting again, but I think it is
worth to keep this topic separate from such a policy change to help
it graduate early.
* js/no-builtins-on-disk-option:
ci: stop linking built-ins to the dashed versions
Optionally skip linking/copying the built-ins
msvc: copy the correct `.pdb` files in the Makefile target `install`
Modernization and fixes to MediaWiki remote backend.
* ab/mediawiki-fixes:
remote-mediawiki: use "sh" to eliminate unquoted commands
remote-mediawiki: annotate unquoted uses of run_git()
remote-mediawiki: convert to quoted run_git() invocation
remote-mediawiki: provide a list form of run_git()
remote-mediawiki tests: annotate failing tests
remote-mediawiki: fix duplicate revisions being imported
remote-mediawiki tests: use CLI installer
remote-mediawiki tests: use inline PerlIO for readability
remote-mediawiki tests: replace deprecated Perl construct
remote-mediawiki tests: use a more idiomatic dispatch table
remote-mediawiki tests: use "$dir/" instead of "$dir."
remote-mediawiki tests: change `[]` to `test`
remote-mediawiki tests: use test_cmp in tests
remote-mediawiki tests: use a 10 character password
remote-mediawiki tests: use the login/password variables
remote-mediawiki doc: don't hardcode Debian PHP versions
remote-mediawiki doc: link to MediaWiki's current version
remote-mediawiki doc: correct link to GitHub project
This fix makes using Git credentials more friendly to Windows users: it
allows a credential helper to communicate using CR/LF line endings ("DOS
line endings" commonly found on Windows) instead of LF-only line endings
("Unix line endings").
Note that this changes the behavior a bit: if a credential helper
produces, say, a password with a trailing Carriage Return character,
that will now be culled even when the rest of the lines end only in Line
Feed characters, indicating that the Carriage Return was not meant to be
part of the line ending.
In practice, it seems _very_ unlikely that something like this happens.
Passwords usually need to consist of non-control characters, URLs need
to have special characters URL-encoded, and user names, well, are names.
However, it _does_ help on Windows, where CR/LF line endings are common:
as unrecognized commands are simply ignored by the credential machinery,
even a command like `quit\r` (which is clearly intended to abort) would
simply be ignored (silently) by Git.
So let's change the credential machinery to accept both CR/LF and LF
line endings.
While we do this for the credential helper protocol, we do _not_ adjust
`git credential-cache--daemon` (which won't work on Windows, anyway,
because it requires Unix sockets) nor `git credential-store` (which
writes the file `~/.git-credentials` which we consider an implementation
detail that should be opaque to the user, read: we do expect users _not_
to edit this file manually).
Signed-off-by: Nikita Leonov <nykyta.leonov@gmail.com>
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
* paulus/master:
gitk: Resize panes correctly when reducing window size
gitk: replace tabs with spaces
gitk: fix the context menu not appearing in the presence of submodule diffs
gitk: Un-hide selection in areas with non-default background color
gitk: add diff lines background colors
gitk: be prepared to be run in a bare repository
gitk: Preserve window dimensions on exit when not using ttk themes
gitk: don't highlight files after submodules as submodules
gitk: fix branch name encoding error
gitk: rename "commit summary" to "commit reference"
The resizeclistpanes and resizecdetpanes procedures attempt to keep
the horizontal proportions of the panes of the gitk window
approximately constant when the gitk window is resized. However, if
the size is reduced enough that an existing sash position would go
outside the window, Tk moves the sash to the left to keep it inside
the window (without moving other sash positions to keep the
proportions). This happens before these resize procedures get
control, and so they work with incorrect proportions.
To fix this, we record the sash positions we set previously and use
those previously-set sash positions rather than the current sash
positions when computing the proportions.
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
The source code is a mix of tabs and spaces. The indentation style
currently is four spaces per indent level but uses tabs every other
level (at eight spaces). Fix this inconsistent spacing and tabbing by
just using a space-indent for everything.
This was done mechanically by running:
$ expand -i gitk >gitk.new
$ mv gitk.new gitk
This patch should be empty with `--ignore-all-space`.
Signed-off-by: Denton Liu <liu.denton@gmail.com>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
Way back in f9b8908b (commit.c: use generation numbers for
in_merge_bases(), 2018-05-01), a heuristic was used to short-circuit
the in_merge_bases() walk. This works just fine as long as the
caller is checking only two commits, but when there are multiple,
there is a possibility that this heuristic is _very wrong_.
Some code moves since then has changed this method to
repo_in_merge_bases_many() inside commit-reach.c. The heuristic
computes the minimum generation number of the "reference" list, then
compares this number to the generation number of the "commit".
In a recent topic, a test was added that used in_merge_bases_many()
to test if a commit was reachable from a number of commits pulled
from a reflog. However, this highlighted the problem: if any of the
reference commits have a smaller generation number than the given
commit, then the walk is skipped _even if there exist some with
higher generation number_.
This heuristic is wrong! It must check the MAXIMUM generation number
of the reference commits, not the MINIMUM.
This highlights a testing gap. t6600-test-reach.sh covers many
methods in commit-reach.c, including in_merge_bases() and
get_merge_bases_many(), but since these methods either restrict to
two input commits or actually look for the full list of merge bases,
they don't check this heuristic!
Add a possible input to "test-tool reach" that tests
in_merge_bases_many() and add tests to t6600-test-reach.sh that
cover this heuristic. This includes cases for the reference commits
having generation above and below the generation of the input commit,
but also having maximum generation below the generation of the input
commit.
The fix itself is to swap min_generation with a max_generation in
repo_in_merge_bases_many().
Reported-by: Srinidhi Kaushik <shrinidhi.kaushik@gmail.com>
Helped-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Derrick Stolee <dstolee@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The format.useAutoBase configuration option exists to allow users to
enable '--base=auto' for format-patch by default.
This can sometimes lead to poor workflow, due to unexpected failures
when attempting to format an ancient patch:
$ git format-patch -1 <an old commit>
fatal: base commit shouldn't be in revision list
This can be very confusing, as it is not necessarily immediately obvious
that the user requested a --base (since this was in the configuration,
not on the command line).
We do want --base=auto to fail when it cannot provide a suitable base,
as it would be equally confusing if a formatted patch did not include
the base information when it was requested.
Teach format.useAutoBase a new mode, "whenAble". This mode will cause
format-patch to attempt to include a base commit when it can. However,
if no valid base commit can be found, then format-patch will continue
formatting the patch without a base commit.
In order to avoid making yet another branch name unusable with --base,
do not teach --base=whenAble or --base=whenable.
Instead, refactor the base_commit option to use a callback, and rely on
the global configuration variable auto_base.
This does mean that a user cannot request this optional base commit
generation from the command line. However, this is likely not too
valuable. If the user requests base information manually, they will be
immediately informed of the failure to acquire a suitable base commit.
This allows the user to make an informed choice about whether to
continue the format.
Add tests to cover the new mode of operation for --base.
Signed-off-by: Jacob Keller <jacob.keller@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Commands such as
$ git pull --rebase --recurse-submodules --quiet
produce non-quiet output from the merge or rebase. Pass the --quiet
option down when invoking "rebase" and "merge".
Also fix the parsing of git submodule update -v.
When e84c3cf3 (git-submodule.sh: accept verbose flag in cmd_update
to be non-quiet, 2018-08-14) taught "git submodule update" to take
"--quiet", it apparently did not know how ${GIT_QUIET:+--quiet}
works, and reviewers seem to have missed that setting the variable
to "0", rather than unsetting it, still results in "--quiet" being
passed to underlying commands.
Signed-off-by: Theodore Dubois <tbodt@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Both fetch and push support pattern refspecs which allow fetching or
pushing references that match a specific pattern. Because these patterns
are globs, they have somewhat limited ability to express more complex
situations.
For example, suppose you wish to fetch all branches from a remote except
for a specific one. To allow this, you must setup a set of refspecs
which match only the branches you want. Because refspecs are either
explicit name matches, or simple globs, many patterns cannot be
expressed.
Add support for a new type of refspec, referred to as "negative"
refspecs. These are prefixed with a '^' and mean "exclude any ref
matching this refspec". They can only have one "side" which always
refers to the source. During a fetch, this refers to the name of the ref
on the remote. During a push, this refers to the name of the ref on the
local side.
With negative refspecs, users can express more complex patterns. For
example:
git fetch origin refs/heads/*:refs/remotes/origin/* ^refs/heads/dontwant
will fetch all branches on origin into remotes/origin, but will exclude
fetching the branch named dontwant.
Refspecs today are commutative, meaning that order doesn't expressly
matter. Rather than forcing an implied order, negative refspecs will
always be applied last. That is, in order to match, a ref must match at
least one positive refspec, and match none of the negative refspecs.
This is similar to how negative pathspecs work.
Signed-off-by: Jacob Keller <jacob.keller@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
When doing combined diffs, we have two possible code paths:
- a slower one which independently diffs against each parent, applies
any filters, and then intersects the resulting paths
- a faster one which walks all trees simultaneously
When the diff options specify that we must do certain filters, like
pickaxe, then we always use the slow path, since the pickaxe code only
knows how to handle filepairs, not the n-parent entries generated for
combined diffs.
But there are two problems with the slow path:
1. It's slow. Running:
git rev-list HEAD | git diff-tree --stdin -r -c
in git.git takes ~3s on my machine. But adding "--find-object" to
that increases it to ~6s, even though find-object itself should
incur only a few extra oid comparisons. On linux.git, it's even
worse: 35s versus 215s.
2. It doesn't catch all cases where a particular path is interesting.
Consider a merge with parent blobs X and Y for a particular path,
and end result Z. That should be interesting according to "-c",
because the result doesn't match either parent. And it should be
interesting even with "--find-object=X", because "X" went away in
the merge.
But because we perform each pairwise diff independently, this
confuses the intersection code. The change from X to Z is still
interesting according to --find-object. But in the other parent we
went from Y to Z, so the diff appears empty! That causes the
intersection code to think that parent didn't change the path, and
thus it's not interesting for "-c".
This patch fixes both by implementing --find-object for the multitree
code. It's a bit unfortunate that we have to duplicate some logic from
diffcore-pickaxe, but this is the best we can do for now. In an ideal
world, all of the diffcore code would stop thinking about filepairs and
start thinking about n-parent sets, and we could use the multitree walk
with all of it.
Until then, there are some leftover warts:
- other pickaxe operations, like -S or -G, still suffer from both
problems. These would be hard to adapt because they rely on having
a diff_filespec() for each path to look at content. And we'd need to
define what an n-way "change" means in each case (probably easy for
"-S", which can compare counts, but not so clear for -G, which is
about grepping diffs).
- other options besides --find-object may cause us to use the slow
pairwise path, in which case we'll go back to producing a different
(wrong) answer for the X/Y/Z case above.
We may be able to hack around these, but I think the ultimate solution
will be a larger rewrite of the diffcore code. For now, this patch
improves one specific case but leaves the rest.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The OFFSETOF_VAR(var, member) macro is implemented in terms of
offsetof(typeof(*var), member) with compilers that know typeof(),
but its fallback implemenation compares &(var->member) and (var) and
count the distance in bytes, i.e.
((uintptr_t)&(var)->member - (uintptr_t)(var))
MSVC's runtime check, when fed an uninitialized 'var', flags this as
a use of an uninitialized variable (and that is legit---uninitialized
contents of 'var' is subtracted) in a debug build.
After auditing all 6 uses of OFFSETOF_VAR(), 1 of them does feed a
potentially uninitialized 'var' to the macro in the beginning of the
for() loop:
#define hashmap_for_each_entry(map, iter, var, member) \
for (var = hashmap_iter_first_entry_offset(map, iter, \
OFFSETOF_VAR(var, member)); \
var; \
var = hashmap_iter_next_entry_offset(iter, \
OFFSETOF_VAR(var, member)))
We can work around this by making sure that var has _some_ value
when OFFSETOF_VAR() is called. Strictly speaking, it invites
undefined behaviour to use NULL here if we end up with pointer
comparison, but MSVC runtime seems to be happy with it, and most
other systems have typeof() and don't even need pointer comparison
fallback code.
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
It is a lot more convenient to use than having to specify the
configuration in CMake manually (does not matter whether using the
command-line or CMake's GUI).
While at it, recommend using `contrib/buildsystems/out/` as build
directory also in the part that talks about running CMake manually.
Helped-by: Junio C Hamano <gitster@pobox.com>
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The idea of having CMake support in Git's source tree is to enable
contributors on Windows to start contributing with little effort. To
that end, we just added some sensible defaults that will let users open
the worktree in Visual Studio and start building.
This expects the dependencies (such as zlib) to be available already,
though. If they are not available, we expect the user to run
`compat/vcbuild/vcpkg_install.bat`.
Rather than requiring this step to be manual, detect the situation and
run it as part of the CMake configuration step.
Note that this obviously only applies to the scenario when we want to
compile in Visual Studio (i.e. with MS Visual C), not with GCC.
Therefore, we guard this new code block behind the `MSVC` conditional.
This concludes our journey to make it as effortless as possible to start
developing Git in Visual Studio: all the developer needs to do is to
clone Git's repository, open the worktree via `File>Open>Folder...` and
wait for CMake to finish configuring.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
We have some custom handling regarding the link options, which are
specific to each compiler.
Therefore: let's not just continue without setting the link options if
configuring for a currently unhandled compiler, but error out.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Contrary to Unix-ish platforms, the dependencies' shared libraries are
not usually found in one central place. In our case, since we use
`vcpkg`, they are to be found inside the `compat/vcbuild/vcpkg/` tree.
Let's make sure that they are in the search path when running the tests.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
By default, the build directory will be called something like
`contrib/buildsystems/out/build/x64-Debug (default)` (note the space and
the parentheses). We need to make sure that such a path is quoted
properly when editing the assignment of the `GIT_BUILD_DIR` variable.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
We are already relying on `vcpkg` to manage our dependencies, including
`libiconv`. Let's also use the `msgfmt.exe` from there.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
We don't use the untracked_cache_dir parameter that is passed in, but
instead look at the untracked_cache_dir inside the cached_dir struct we
are passed. It's been this way since the introduction of
treat_path_fast() in 91a2288b5f (untracked cache: record/validate dir
mtime and reuse cached output, 2015-03-08).
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The append_signoff() function takes an "ignore_footer"
argument, which specifies a number of bytes at the end of
the message buffer which should not be considered (they
cannot contain trailers, and the trailer is spliced in
before them).
But to find the existing trailers, it calls into
has_conforming_trailer(). That function takes an
ignore_footer parameter, but since 967dfd4d56 (sequencer:
use trailer's trailer layout, 2016-11-02) the parameter is
completely ignored.
The trailer interface we're using takes a single string,
with no option to tell it to use part of the string.
However, since we have a mutable strbuf, we can work around
this by simply overwriting (and later restoring) the
boundary with a NUL.
I'm not sure if this can actually trigger a bug in practice.
It's easy to get a non-zero ignore_footer by doing something
like this:
git commit -F - --cleanup=verbatim <<-EOF
subject
body
Signed-off-by: me
# this looks like a comment, but is actually in the
# message! That makes the earlier s-o-b fake.
EOF
git commit --amend -s
There git-commit calls ignore_non_trailer() to count up the
"#" cruft, which becomes the ignore_footer header. But it
works even without this patch! That's because the trailer
code _also_ calls ignore_non_trailer() and skips the cruft,
too. So it happens to work because the only callers with a
non-zero ignore_footer are using the exact same function
that the trailer parser uses internally.
And that seems true for all of the current callers, but
there's nothing guaranteeing it. We're better off only
feeding the correct buffer to the trailer code in the first
place.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
We complain if "test-tool advise" is not given an argument, but we
quietly ignore any additional arguments it receives. Let's instead check
that we got the expected number. As a bonus, this silences
-Wunused-parameter, which notes that we don't ever look at argc.
While we're here, we can also fix the indentation in the conditional.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The sparse-checkout passes along argv and argc to its sub-command helper
functions. Many of these sub-commands do not yet take any command-line
options, and ignore those parameters.
Let's instead add empty option lists and make sure we call
parse_options(). That will give a useful error message for something
like:
git sparse-checkout list --nonsense
which currently just silently ignores the unknown option.
As a bonus, it also silences some -Wunused-parameter warnings.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
When we switched to using an external git-commit call in b0a3186140
(sequencer: simplify root commit creation, 2019-08-19), this function
didn't need to care about the repository object any more.
Arguably we could be passing along the repository path to the external
git-commit by using "--git-dir=r->path" here. But for the most part the
sequencer code relies on sub-process finding the same repository we're
already in (using the same environment variables or discovery process we
did). But we don't have a convenient interface for doing so, and there's
no indication that we need to. Let's just drop the unused parameter for
now.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
We stopped using the "repo" argument in 8e4c8af058 (push: disallow --all
and refspecs when remote.<name>.mirror is set, 2019-09-02), which moved
the pushremote handling to its caller.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
In the spirit of 517fe807d6 (assert NOARG/NONEG behavior of
parse-options callbacks, 2018-11-05), let's cover some parse-options
callbacks which expect to be used with PARSE_OPT_NONEG but don't
explicitly assert that this is the case. These callbacks are all used
correctly in the current code, but this will help document their
expectations and future-proof the code.
As a bonus, it also silences -Wunused-parameters (these were added since
the initial sweep of 517fe807d6, and we can't yet turn on
-Wunused-parameters to remind people because it has too many existing
false positives).
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
We use OPT_CALLBACK_F() to call the option_parse_type() callback,
passing it the address of "cmdmode" as the value to write to. But the
callback doesn't look at opt->value at all, and instead writes to a
global variable.
This works out because that's the same global variable we happen to pass
in, but it's rather confusing. Let's use the passed-in value instead.
We'll also make "cmdmode" a local variable of the main function,
ensuring we can't make the same mistake again.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Many functions take an argv/argc pair, but never actually look at argc.
This makes it useless at best (we use the NULL sentinel in argv to find
the end of the array), and misleading at worst (what happens if the argc
count does not match the argv NULL?).
In each of these instances, the argv NULL does match the argc count, so
there are no bugs here. But let's tighten the interfaces to make it
harder to get wrong (and to reduce some -Wunused-parameter complaints).
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The crlf_action parameter hasn't been used since a0ad53c181 (convert:
Correct NNO tests and missing `LF will be replaced by CRLF`,
2016-08-13), where that part of the function was hoisted out to a
separate will_convert_lf_to_crlf() helper. Let's drop the useless
parameter.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Earlier we taught "git pull" to warn when the user does not say the
histories need to be merged, rebased or accepts only fast-
forwarding, but the warning triggered for those who have set the
pull.ff configuration variable.
* ah/pull:
pull: don't warn if pull.ff has been set
"git range-diff" showed incorrect diffstat, which has been
corrected.
* tg/range-diff-same-file-fix:
diff: fix modified lines stats with --stat and --numstat
Adjust sample hooks for hash algorithm other than SHA-1.
* dl/zero-oid-in-hooks:
hooks--update.sample: use hash-agnostic zero OID
hooks--pre-push.sample: use hash-agnostic zero OID
hooks--pre-push.sample: modernize script
"git clone" that clones from SHA-1 repository, while
GIT_DEFAULT_HASH set to use SHA-256 already, resulted in an
unusable repository that half-claims to be SHA-256 repository
with SHA-1 objects and refs. This has been corrected.
* bc/clone-with-git-default-hash-fix:
builtin/clone: avoid failure with GIT_DEFAULT_HASH
"git commit-graph write" learned to limit the number of bloom
filters that are computed from scratch with the --max-new-filters
option.
* tb/bloom-improvements:
commit-graph: introduce 'commitGraph.maxNewFilters'
builtin/commit-graph.c: introduce '--max-new-filters=<n>'
commit-graph: rename 'split_commit_graph_opts'
bloom: encode out-of-bounds filters as non-empty
bloom/diff: properly short-circuit on max_changes
bloom: use provided 'struct bloom_filter_settings'
bloom: split 'get_bloom_filter()' in two
commit-graph.c: store maximum changed paths
commit-graph: respect 'commitGraph.readChangedPaths'
t/helper/test-read-graph.c: prepare repo settings
commit-graph: pass a 'struct repository *' in more places
t4216: use an '&&'-chain
commit-graph: introduce 'get_bloom_filter_settings()'
More FAQ entries.
* bc/faq-misc:
docs: explain how to deal with files that are always modified
docs: explain why reverts are not always applied on merge
docs: explain why squash merges are broken with long-running branches
Get rid of 'dense' argument that is redundant for every function that has
'struct rev_info *rev' argument as well, as the value of 'dense' passed is
always taken from 'rev->dense_combined_merges' field.
The only place where this was not the case is in 'submodule.c' where
'diff_tree_combined_merge()' was called with '1' for 'dense' argument. However,
at that call the 'revs' instance used is local to the function, and we now just
set 'revs->dense_combined_merges' to 1 in this local instance.
Signed-off-by: Sergey Organov <sorganov@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
When add_delta_base_cache() is called with a base that is already in the
cache, no operation is performed. But the check is done after allocating
space for a new entry, so we end up leaking memory on the early return.
In addition, the caller never free()'s the base as it expects the
function to take ownership of it. But the base is not released when we
skip insertion, so it also gets leaked. To fix these problems, move the
allocation of a new entry further down in add_delta_base_cache(), and
free() the base on early return.
Signed-off-by: Matheus Tavares <matheus.bernardino@usp.br>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The third phase of unpack_entry() performs the following sequence in a
loop, until all the deltas enumerated in phase one are applied and the
entry is fully reconstructed:
1. Add the current base entry to the delta base cache
2. Unpack the next delta
3. Patch the unpacked delta on top of the base
When the optional object reading lock is enabled, the above steps will
be performed while holding the lock. However, step 2. momentarily
releases it so that inflation can be performed in parallel for increased
performance. Because the `base` buffer inserted in the cache at 1. is
not duplicated, another thread can potentially free() it while the lock
is released at 2. (e.g. when there is no space left in the cache to
insert another entry). In this case, the later attempt to dereference
`base` at 3. will cause a segmentation fault. This problem was observed
during a multithreaded git-grep execution on a repository with large
objects.
To fix the race condition (and later segmentation fault), let's reorder
the aforementioned steps so that `base` is only added to the cache at
the end. This will prevent the buffer from being released by another
thread while it is still in use. An alternative solution which would not
require the reordering would be to duplicate `base` before inserting it
in the cache. However, as Phil Hord mentioned, memcpy()'ing large bases
can negatively affect performance: in his experiments, this alternative
approach slowed git-grep down by 10% to 20%.
Reported-by: Phil Hord <phil.hord@gmail.com>
Signed-off-by: Matheus Tavares <matheus.bernardino@usp.br>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
When a fetch with the --filter argument is made, the configured default
filter is set even if one already exists. This change was made in
5e46139376 ("builtin/fetch: remove unique promisor remote limitation",
2019-06-25) - in particular, changing from:
* If this is the FIRST partial-fetch request, we enable partial
* on this repo and remember the given filter-spec as the default
* for subsequent fetches to this remote.
to:
* If this is a partial-fetch request, we enable partial on
* this repo if not already enabled and remember the given
* filter-spec as the default for subsequent fetches to this
* remote.
(The given filter-spec is "remembered" even if there is already an
existing one.)
This is problematic whenever a lazy fetch is made, because lazy fetches
are made using "git fetch --filter=blob:none", but this will also happen
if the user invokes "git fetch --filter=<filter>" manually. Therefore,
restore the behavior prior to 5e46139376, which writes a filter-spec
only if the current fetch request is the first partial-fetch one (for
that remote).
Signed-off-by: Jonathan Tan <jonathantanmy@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The text tries to say the code accepts many variations that look remotely
like scissors and perforation marks, but gives too little detail for users
to decide what is and what is not taken as a scissors line for themselves.
Instead of describing the heuristics more, just spell out what will always
be accepted, namely "-- >8 --", as it would not help users to give them
more choices and flexibility and be "creative" in their scissors line.
Signed-off-by: Evan Gates <evan.gates@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
On Windows, we use the `vcpkg` project to manage the dependencies, via
`compat/vcbuild/`. Let's make sure that these dependencies are found by
default.
This is needed because we are about to recommend loading the Git
worktree as a folder into Visual Studio, relying on the automatic CMake
support (which would make it relatively cumbersome to adjust the search
path used by CMake manually).
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
By default, Git for Windows does not install its `sh.exe` into the
`PATH`. However, our current `CMakeLists.txt` expects to find a shell
interpreter in the `PATH`.
So let's fall back to looking in the default location where Git for
Windows _does_ install a relatively convenient `sh.exe`:
`C:\Program Files\Git\bin\sh.exe`
Helped-by: Øystein Walle <oystwa@gmail.com>
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
That should be a ":", not a second "=". While at it, refer to the
placeholder "<n>" as "<n>", not "n" (see, e.g., the entry just before
this one).
Signed-off-by: Martin Ågren <martin.agren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
We document how `merge.suppressDest` can be used to omit " into <branch
name>" from the title of the merge message. It is true that we omit the
space character before "into", but that lone double quote character
risks ending up on the wrong side of a line break, looking a bit out of
place. This currently happens with, e.g., 80-character terminals.
Drop that leading quoted space. The result should be just as clear about
how this option affects the formatted message.
Signed-off-by: Martin Ågren <martin.agren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
