The sideband demultiplexor writes the data it receives on sideband
with xwrite(). We can lose data if the underlying write(2) results
in a short write.
If they are limited to unimportant bytes like eye-candy progress
meter, it may be OK to lose them, but lets be careful and ensure
that we use write_in_full() instead. Note that the original does
not check for errors, and this rewrite does not check for one. At
least not yet.
Signed-off-by: Junio C Hamano <gitster@pobox.com>
We have two packfile stream consumers, index-pack and
unpack-objects, that allow excess payload after the packfile stream
data. Their code to relay excess data hasn't changed significantly
since their original implementation that appeared in 67e5a5ec
(git-unpack-objects: re-write to read from stdin, 2005-06-28) and
9bee2478 (mimic unpack-objects when --stdin is used with index-pack,
2006-10-25).
These code blocks contain hand-rolled loops using xwrite(), written
before our write_in_full() helper existed. This helper now provides
the same functionality.
Replace these loops with write_in_full() for shorter, clearer
code. Update related variables accordingly.
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Practice the new mark-up rule for <placeholders> with "git add"
documentation page.
* jc/doc-add-placeholder-fix:
doc: apply the new placeholder rules to git-add documentation
The way placeholders are to be marked-up in documentation have been
specified; use "_<placeholder>_" to typeset the word inside a pair
of <angle-brakets> emphasized.
* ja/doc-placeholders-markup-rules:
doc: clarify the format of placeholders
"git reflog" learned a "list" subcommand that enumerates known reflogs.
* ps/reflog-list:
builtin/reflog: introduce subcommand to list reflogs
refs: stop resolving ref corresponding to reflogs
refs: drop unused params from the reflog iterator callback
refs: always treat iterators as ordered
refs/files: sort merged worktree and common reflogs
refs/files: sort reflogs returned by the reflog iterator
dir-iterator: support iteration in sorted order
dir-iterator: pass name to `prepare_next_entry_data()` directly
Doc update.
* ja/docfixes:
doc: end sentences with full-stop
doc: close unclosed angle-bracket of a placeholder in git-clone doc
doc: git-rev-parse: enforce command-line description syntax
"git difftool --dir-diff" learned to honor the "--trust-exit-code"
option; it used to always exit with 0 and signalled success.
* ps/difftool-dir-diff-exit-code:
git-difftool--helper: honor `--trust-exit-code` with `--dir-diff`
Credential helper based on libsecret (in contrib/) has been updated
to handle an empty password correctly.
* mh/libsecret-empty-password-fix:
libsecret: retrieve empty password
Some parts of command line completion script (in contrib/) have
been micro-optimized.
* bb/completion-no-grep-into-awk:
completion: use awk for filtering the config entries
Variants of vimdiff learned to honor mergetool.<variant>.layout settings.
* km/mergetool-vimdiff-layout-fallback:
mergetools: vimdiff: use correct tool's name when reading mergetool config
"git tag --column" failed to check the exit status of its "git
column" invocation, which has been corrected.
* rj/tag-column-fix:
tag: error when git-column fails
"git am --help" now tells readers what actions are available in
"git am --whitespace=<action>", in addition to saying that the
option is passed through to the underlying "git apply".
* jc/am-whitespace-doc:
doc: add shortcut to "am --whitespace=<action>"
More tests that are marked as "ref-files only" have been updated to
improve test coverage of reftable backend.
* ps/ref-tests-update-even-more:
t7003: ensure filter-branch prunes reflogs with the reftable backend
t2011: exercise D/F conflicts with HEAD with the reftable backend
t1405: remove unneeded cleanup step
t1404: make D/F conflict tests compatible with reftable backend
t1400: exercise reflog with gaps with reftable backend
t0410: convert tests to use DEFAULT_REPO_FORMAT prereq
t: move tests exercising the "files" backend
Teach "git checkout -p" and friends that "@" is a synonym for
"HEAD".
* gt/at-is-synonym-for-head-in-add-patch:
add -p tests: remove PERL prerequisites
add-patch: classify '@' as a synonym for 'HEAD'
"git column" has been taught to reject negative padding value, as
it would lead to nonsense behaviour including division by zero.
* kh/column-reject-negative-padding:
column: guard against negative padding
column: disallow negative padding
Adjust use of "rev-list --missing" in an existing tests so that it
does not depend on a buggy failure mode.
* jc/t9210-lazy-fix:
t9210: do not rely on lazy fetching to fail
The code to iterate over refs with the reftable backend has seen
some optimization.
* ps/reftable-iteration-perf:
reftable/reader: add comments to `table_iter_next()`
reftable/record: don't try to reallocate ref record name
reftable/block: swap buffers instead of copying
reftable/pq: allocation-less comparison of entry keys
reftable/merged: skip comparison for records of the same subiter
reftable/merged: allocation-less dropping of shadowed records
reftable/record: introduce function to compare records by key
"git apply" on a filesystem without filemode support have learned
to take a hint from what is in the index for the path, even when
not working with the "--index" or "--cached" option, when checking
the executable bit match what is required by the preimage in the
patch.
* cp/apply-core-filemode:
apply: code simplification
apply: correctly reverse patch's pre- and post-image mode bits
apply: ignore working tree filemode when !core.filemode
Integrate the reftable code into the refs framework as a backend.
* ps/reftable-backend:
refs/reftable: fix leak when copying reflog fails
ci: add jobs to test with the reftable backend
refs: introduce reftable backend
In af626ac0e0 (pack-bitmap: enable reuse from all bitmapped packs,
2023-12-14), the documentation for `pack.allowPackReuse` was amended to
include its effect when set to "multi".
This split the documentation into two paragraphs, but did not de-dent
the second paragraph on the right-hand side of a line-continuation
marker. This causes the rendered documentation to appear oddly, where
the second paragraph is treated as a <pre> block when rendered as HTML.
Fix this by correctly removing the indentation on the second paragraph.
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Add the new format rule when using placeholders in the description of
commands and options.
Signed-off-by: Jean-Noël Avila <jn.avila@free.fr>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
While the git-reflog(1) command has subcommands to show reflog entries
or check for reflog existence, it does not have any subcommands that
would allow the user to enumerate all existing reflogs. This makes it
quite hard to discover which reflogs a repository has. While this can
be worked around with the "files" backend by enumerating files in the
".git/logs" directory, users of the "reftable" backend don't enjoy such
a luxury.
Introduce a new subcommand `git reflog list` that lists all reflogs the
repository knows of to fill this gap.
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The reflog iterator tries to resolve the corresponding ref for every
reflog that it is about to yield. Historically, this was done due to
multiple reasons:
- It ensures that the refname is safe because we end up calling
`check_refname_format()`. Also, non-conformant refnames are skipped
altogether.
- The iterator used to yield the resolved object ID as well as its
flags to the callback. This info was never used though, and the
corresponding parameters were dropped in the preceding commit.
- When a ref is corrupt then the reflog is not emitted at all.
We're about to introduce a new `git reflog list` subcommand that will
print all reflogs that the refdb knows about. Skipping over reflogs
whose refs are corrupted would be quite counterproductive in this case
as the user would have no way to learn about reflogs which may still
exist in their repository to help and rescue such a corrupted ref. Thus,
the only remaining reason for why we'd want to resolve the ref is to
verify its refname.
Refactor the code to call `check_refname_format()` directly instead of
trying to resolve the ref. This is significantly more efficient given
that we don't have to hit the object database anymore to list reflogs.
And second, it ensures that we end up showing reflogs of broken refs,
which will help to make the reflog more useful.
Note that this really only impacts the case where the corresponding ref
is corrupt. Reflogs for nonexistent refs would have been returned to the
caller beforehand already as we did not pass `RESOLVE_REF_READING` to
the function, and thus `refs_resolve_ref_unsafe()` would have returned
successfully in that case.
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The ref and reflog iterators share much of the same underlying code to
iterate over the corresponding entries. This results in some weird code
because the reflog iterator also exposes an object ID as well as a flag
to the callback function. Neither of these fields do refer to the reflog
though -- they refer to the corresponding ref with the same name. This
is quite misleading. In practice at least the object ID cannot really be
implemented in any other way as a reflog does not have a specific object
ID in the first place. This is further stressed by the fact that none of
the callbacks except for our test helper make use of these fields.
Split up the infrastucture so that ref and reflog iterators use separate
callback signatures. This allows us to drop the nonsensical fields from
the reflog iterator.
Note that internally, the backends still use the same shared infra to
iterate over both types. As the backends should never end up being
called directly anyway, this is not much of a problem and thus kept
as-is for simplicity's sake.
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
In the preceding commit we have converted the reflog iterator of the
"files" backend to be ordered, which was the only remaining ref iterator
that wasn't ordered. Refactor the ref iterator infrastructure so that we
always assume iterators to be ordered, thus simplifying the code.
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
When iterating through reflogs in a worktree we create a merged iterator
that merges reflogs from both refdbs. The resulting refs are ordered so
that instead we first return all worktree reflogs before we return all
common refs.
This is the only remaining case where a ref iterator returns entries in
a non-lexicographic order. The result would look something like the
following (listed with a command we introduce in a subsequent commit):
```
$ git reflog list
HEAD
refs/worktree/per-worktree
refs/heads/main
refs/heads/wt
```
So we first print the per-worktree reflogs in lexicographic order, then
the common reflogs in lexicographic order. This is confusing and not
consistent with how we print per-worktree refs, which are exclusively
sorted lexicographically.
Sort reflogs lexicographically in the same way as we sort normal refs.
As this is already implemented properly by the "reftable" backend via a
separate selection function, we simply pull out that logic and reuse it
for the "files" backend. As logs are properly sorted now, mark the
merged reflog iterator as sorted.
Tests will be added in a subsequent commit.
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
We use a directory iterator to return reflogs via the reflog iterator.
This iterator returns entries in the same order as readdir(3P) would and
will thus yield reflogs with no discernible order.
Set the new `DIR_ITERATOR_SORTED` flag that was introduced in the
preceding commit so that the order is deterministic. While the effect of
this can only been observed in a test tool, a subsequent commit will
start to expose this functionality to users via a new `git reflog list`
subcommand.
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The `struct dir_iterator` is a helper that allows us to iterate through
directory entries. This iterator returns entries in the exact same order
as readdir(3P) does -- or in other words, it guarantees no specific
order at all.
This is about to become problematic as we are introducing a new reflog
subcommand to list reflogs. As the "files" backend uses the directory
iterator to enumerate reflogs, returning reflog names and exposing them
to the user would inherit the indeterministic ordering. Naturally, it
would make for a terrible user interface to show a list with no
discernible order.
While this could be handled at a higher level by the new subcommand
itself by collecting and ordering the reflogs, this would be inefficient
because we would first have to collect all reflogs before we can sort
them, which would introduce additional latency when there are many
reflogs.
Instead, introduce a new option into the directory iterator that asks
for its entries to be yielded in lexicographical order. If set, the
iterator will read all directory entries greedily and sort them before
we start to iterate over them.
While this will of course also incur overhead as we cannot yield the
directory entries immediately, it should at least be more efficient than
having to sort the complete list of reflogs as we only need to sort one
directory at a time.
This functionality will be used in a follow-up commit.
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
When adding the next directory entry for `struct dir_iterator` we pass
the complete `struct dirent *` to `prepare_next_entry_data()` even
though we only need the entry's name.
Refactor the code to pass in the name, only. This prepares for a
subsequent commit where we introduce the ability to iterate through
dir entries in an ordered manner.
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
When you run `git rebase --continue` when no rebase is in progress, git
outputs `fatal: No rebase in progress?` which is not a question but a
statement. Make it appear as a statement, and use lowercase to align
with error message style.
Signed-off-by: Harmen Stoppels <me@harmenstoppels.nl>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
git-rev-parse(1) manpage is completely off with respect to the
command-line description syntax with badly formatted placeholders and
malformed alternatives.
Signed-off-by: Jean-Noël Avila <jn.avila@free.fr>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
