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2025-12-09The seventh batchJunio C Hamano1-0/+15
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2025-12-09Merge branch 'en/replay-doc-revision-range'Junio C Hamano2-8/+7
The use of "revision" (a connected set of commits) has been clarified in the "git replay" documentation. * en/replay-doc-revision-range: Documentation/git-replay.adoc: fix errors around revision range
2025-12-09Merge branch 'yc/xdiff-patience-optim'Junio C Hamano1-1/+4
The way patience diff finds LCS has been optimized. * yc/xdiff-patience-optim: xdiff: optimize patience diff's LCS search
2025-12-09Merge branch 'bc/zsh-testsuite'Junio C Hamano2-3/+3
A few tests have been updated to work under the shell compatible mode of zsh. * bc/zsh-testsuite: t5564: fix test hang under zsh's sh mode t0614: use numerical comparison with test_line_count
2025-12-09Merge branch 'pw/replay-exclude-gpgsig-fix'Junio C Hamano1-1/+1
"git replay" forgot to omit the "gpgsig-sha256" extended header from the resulting commit the same way it omits "gpgsig", which has been corrected. * pw/replay-exclude-gpgsig-fix: replay: do not copy "gpgsign-sha256" header
2025-12-09config: document 'gui.GCWarning'Matthew Hughes1-0/+5
While investigating the config options set by 'scalar' I noticed this one wasn't documented. Signed-off-by: Matthew Hughes <matthewhughes934@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2025-12-09doc: send-email: fix broken list continuationKristoffer Haugsbakk1-1/+0
The list continuation has to be “immediately adjacent to the block being attached”.[1] [1]: https://web.archive.org/web/20251208172615/https://docs.asciidoctor.org/asciidoc/latest/lists/continuation/ Signed-off-by: Kristoffer Haugsbakk <code@khaugsbakk.name> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2025-12-09connect: plug protocol capability leakJunio C Hamano3-0/+42
When pushing to a set of remotes using a nickname for the group, the client initializes the connection to each remote, talks to the remote and reads and parses capabilities line, and holds the capabilities in a file-scope static variable server_capabilities_v1. There are a few other such file-scope static variables, and these connections cannot be parallelized until they are refactored to a structure that keeps track of active connections. Which is *not* the theme of this patch ;-) For a single connection, the server_capabilities_v1 variable is initialized to NULL (at the program initialization), populated when we talk to the other side, used to look up capabilities of the other side possibly multiple times, and the memory is held by the variable until program exit, without leaking. When talking to multiple remotes, however, the server capabilities from the second connection overwrites without freeing the one from the first connection, which leaks. ==1080970==ERROR: LeakSanitizer: detected memory leaks Direct leak of 421 byte(s) in 2 object(s) allocated from: #0 0x5615305f849e in strdup (/home/gitster/g/git-jch/bin/bin/git+0x2b349e) (BuildId: 54d149994c9e85374831958f694bd0aa3b8b1e26) #1 0x561530e76cc4 in xstrdup /home/gitster/w/build/wrapper.c:43:14 #2 0x5615309cd7fa in process_capabilities /home/gitster/w/build/connect.c:243:27 #3 0x5615309cd502 in get_remote_heads /home/gitster/w/build/connect.c:366:4 #4 0x561530e2cb0b in handshake /home/gitster/w/build/transport.c:372:3 #5 0x561530e29ed7 in get_refs_via_connect /home/gitster/w/build/transport.c:398:9 #6 0x561530e26464 in transport_push /home/gitster/w/build/transport.c:1421:16 #7 0x561530800bec in push_with_options /home/gitster/w/build/builtin/push.c:387:8 #8 0x5615307ffb99 in do_push /home/gitster/w/build/builtin/push.c:442:7 #9 0x5615307fe926 in cmd_push /home/gitster/w/build/builtin/push.c:664:7 #10 0x56153065673f in run_builtin /home/gitster/w/build/git.c:506:11 #11 0x56153065342f in handle_builtin /home/gitster/w/build/git.c:779:9 #12 0x561530655b89 in run_argv /home/gitster/w/build/git.c:862:4 #13 0x561530652cba in cmd_main /home/gitster/w/build/git.c:984:19 #14 0x5615308dda0a in main /home/gitster/w/build/common-main.c:9:11 #15 0x7f051651bca7 in __libc_start_call_main csu/../sysdeps/nptl/libc_start_call_main.h:58:16 SUMMARY: AddressSanitizer: 421 byte(s) leaked in 2 allocation(s). Free the capablities data for the previous server before overwriting it with the next server to plug this leak. The added test fails without the freeing with SANITIZE=leak; I somehow couldn't get it fail reliably with SANITIZE=leak,address though. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2025-12-08doc: join default pre-commit paragraphsKristoffer Haugsbakk1-7/+4
Join two paragraphs that start with the standard “The default <hook>, when enabled” into one and put it at the end of the “pre-commit” section. The trailing whitespace paragraph was added in the first commit for the doc, in 6d35cc76 (Document hooks., 2005-09-02). Then 3e14dd2c (mention use of "hooks.allownonascii" in "man githooks", 2019-02-20) updated the “pre-commit” section to mention the non-ASCII check that was added in d00e364d.[1] But this paragraph was added one-past the original “default” paragraph, after the env. variable paragraph, and starts exactly the same. That causes the flow of this section to feel off (paragraphs in order): 1. Invoked by <cmd> and what parameters it takes 2. The default 'pre-commit' hook catches introduction of trailing whitespace 3. `GIT_EDITOR=:` 4. The default pre-commit' hook catches introduction of non-ASCII filenames Let’s instead join these two paragrahs and explain the whole behavior of the default script. † 1: Extend sample pre-commit hook to check for non ascii filenames, 2009-05-19 Signed-off-by: Kristoffer Haugsbakk <code@khaugsbakk.name> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2025-12-07completion: clarify support for short options and argumentsJunio C Hamano1-1/+2
The list of supported completions in the header of the file was mostly written a long time ago when Shawn added the initial version of this script in 2006. The list explicitly states that we complete "common --long-options", which implies that we do not complete not-so-common ones and single letter options (this text dates back to May 2007). Update the description to explicitly state that single-letter options are not completed. Also, document that arguments to options are completed, even for single-letter options (e.g., "git -c <TAB>" offers configuration variables). The reason why we do not complete single-letter options is because it does not seem to help all that much to learn that the command takes -c, -d, -e options when "git foo -<TAB>" offers these three, unlike long options that is easier to guess what they are about. Because this rationale is primarily for our developers, let's leave it out of the completion script itself, whose messages are entirely for end-users. Our developers can run "git blame" to find this commit as needed. Signed-off-by: Junio C Hamano <gitster@pobox.com>
2025-12-07compat: remove gitmkdtemp()René Scharfe5-14/+2
gitmkdtemp() has become a trivial wrapper around git_mkdtemp(). Remove this now unnecessary layer of indirection. Signed-off-by: René Scharfe <l.s.r@web.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2025-12-07banned.h: ban mktemp(3)René Scharfe1-0/+3
Older versions of mktemp(3) generate easily guessable file names. The function checks if the generated name is used, which is unreliable, as a file with that name might then be created by some other process before we can do it ourselves. The function was dropped from POSIX due to its security problems. Forbid its use. Signed-off-by: René Scharfe <l.s.r@web.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2025-12-07compat: remove mingw_mktemp()René Scharfe2-15/+0
Remove the mktemp(3) compatibility function now that its last caller was removed by the previous commit. Signed-off-by: René Scharfe <l.s.r@web.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2025-12-07compat: use git_mkdtemp()René Scharfe1-3/+1
A file might appear at the path returned by mktemp(3) before we call mkdir(2). Use the more robust git_mkdtemp() instead, which retries a number of times and doesn't need to call lstat(2). Signed-off-by: René Scharfe <l.s.r@web.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2025-12-07wrapper: add git_mkdtemp()René Scharfe2-2/+21
Extend git_mkstemps_mode() to optionally call mkdir(2) instead of open(2), then use that ability to create a mkdtemp(3) replacement, git_mkdtemp(). We'll start using it in the next commit. Signed-off-by: René Scharfe <l.s.r@web.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2025-12-07gitattributes: disable blank-at-eof errors for clar test expectationsPatrick Steinhardt1-0/+1
The clar unit testing framework carries a couple of files that contain expected output for its self-tests. Some of these files expectedly end with a blank line at the end of the file, which Git would consider to be a whitespace error by default. Teach our gitattributes to ignore those errors. Suggested-by: Junio C Hamano <gitster@pobox.com> Signed-off-by: Patrick Steinhardt <ps@pks.im> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2025-12-07t/unit-tests: demonstrate use of integer comparison assertionsPatrick Steinhardt1-11/+11
The clar project has introduced a couple of new assertions that perform relative integer comparisons, like "greater than" or "less or equal". Adapt the reftable-record unit tests to demonstrate their usage. Signed-off-by: Patrick Steinhardt <ps@pks.im> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2025-12-07t/unit-tests: update clar to 39f11fePatrick Steinhardt12-59/+508
Update clar to commit 39f11fe (Merge pull request #131 from pks-gitlab/pks-integer-double-evaluation, 2025-12-05). This commit includes the following changes relevant to Git: - There are now typesafe integer comparison functions. Furthermore, the range of comparison functions has been included to also have relative comparisons, like "greater than". - There is a new `cl_failf()` macro that allows the caller to specify an error message with formatting directives. - The TAP format has been fixed to correctly terminate YAML blocks with "...\n" instead of "---\n". Note that we already had a `cl_failf()` function declared in our own sources. This function is equivalent to the upstreamed function, so we can simply drop it now. Signed-off-by: Patrick Steinhardt <ps@pks.im> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2025-12-05Merge branch 'ps/object-source-management' into ps/odb-misc-fixesJunio C Hamano31-277/+412
* ps/object-source-management: odb: handle recreation of quarantine directories odb: handle changing a repository's commondir chdir-notify: add function to unregister listeners odb: handle initialization of sources in `odb_new()` http-push: stop setting up `the_repository` for each reference t/helper: stop setting up `the_repository` repeatedly builtin/index-pack: fix deferred fsck outside repos oidset: introduce `oidset_equal()` odb: move logic to disable ref updates into repo odb: refactor `odb_clear()` to `odb_free()` odb: adopt logic to close object databases setup: convert `set_git_dir()` to have file scope path: move `enter_repo()` into "setup.c"
2025-12-05The sixth batchJunio C Hamano1-0/+31
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2025-12-05Merge branch 'rs/config-set-multi-error-message-fix'Junio C Hamano1-1/+1
The error message given by "git config set", when the variable being updated has more than one values defined, used old style "git config" syntax with an incorrect option in its hint, both of which have been corrected. * rs/config-set-multi-error-message-fix: config: fix suggestion for failed set of multi-valued option
2025-12-05Merge branch 'rs/config-unset-opthelp-fix'Junio C Hamano1-2/+2
The option help text given by "git config unset -h" described the "--all" option to "replace", not "unset", multiple variables, which has been corrected. * rs/config-unset-opthelp-fix: config: fix short help of unset flags
2025-12-05Merge branch 'ps/object-source-management'Junio C Hamano31-277/+412
Code refactoring around object database sources. * ps/object-source-management: odb: handle recreation of quarantine directories odb: handle changing a repository's commondir chdir-notify: add function to unregister listeners odb: handle initialization of sources in `odb_new()` http-push: stop setting up `the_repository` for each reference t/helper: stop setting up `the_repository` repeatedly builtin/index-pack: fix deferred fsck outside repos oidset: introduce `oidset_equal()` odb: move logic to disable ref updates into repo odb: refactor `odb_clear()` to `odb_free()` odb: adopt logic to close object databases setup: convert `set_git_dir()` to have file scope path: move `enter_repo()` into "setup.c"
2025-12-05Merge branch 'cc/fast-import-strip-if-invalid'Junio C Hamano8-28/+205
"git fast-import" learns "--strip-if-invalid" option to drop invalid cryptographic signature from objects. * cc/fast-import-strip-if-invalid: fast-import: add 'strip-if-invalid' mode to --signed-commits=<mode> commit: refactor verify_commit_buffer() fast-import: refactor finalize_commit_buffer()
2025-12-05Merge branch 'js/ci-show-breakage-in-dockerized-jobs'Junio C Hamano1-1/+1
Dockerised jobs at the GitHub Actions CI have been taught to show more details of failed tests. * js/ci-show-breakage-in-dockerized-jobs: ci(dockerized): do show the result of failing tests again
2025-12-05Merge branch 'kh/doc-committer-date-is-author-date'Junio C Hamano2-0/+14
The "--committer-date-is-author-date" option of "git am/rebase" is a misguided one. The documentation is updated to discourage its use. * kh/doc-committer-date-is-author-date: doc: warn against --committer-date-is-author-date
2025-12-05Merge branch 'jc/optional-path'Junio C Hamano11-23/+102
"git config get --path" segfaulted on an ":(optional)path" that does not exist, which has been corrected. * jc/optional-path: config: really treat missing optional path as not configured config: really pretend missing :(optional) value is not there config: mark otherwise unused function as file-scope static
2025-12-05Merge branch 'js/strip-scalar-too'Junio C Hamano1-1/+1
"make strip" has been taught to strip "scalar" as well as "git". * js/strip-scalar-too: make strip: include `scalar`
2025-12-05Merge branch 'en/xdiff-cleanup-2'Junio C Hamano13-110/+336
Code clean-up. * en/xdiff-cleanup-2: xdiff: rename rindex -> reference_index xdiff: change rindex from long to size_t in xdfile_t xdiff: make xdfile_t.nreff a size_t instead of long xdiff: make xdfile_t.nrec a size_t instead of long xdiff: split xrecord_t.ha into line_hash and minimal_perfect_hash xdiff: use unambiguous types in xdl_hash_record() xdiff: use size_t for xrecord_t.size xdiff: make xrecord_t.ptr a uint8_t instead of char xdiff: use ptrdiff_t for dstart/dend doc: define unambiguous type mappings across C and Rust
2025-12-05repo: add -z as an alias for --format=nul to git-repo-structureLucas Seiki Oshiro3-3/+16
Other Git commands that have nul-terminated output, such as git-config, git-status, git-ls-files, and git-repo-info have a flag `-z` for using the null character as the record separator. Add the `-z` flag to git-repo-structure as an alias for `--format=nul`, making it consistent with the behavior of the other commands. Signed-off-by: Lucas Seiki Oshiro <lucasseikioshiro@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2025-12-05repo: use [--format=... | -z] instead of [-z] in git-repo-info synopsisLucas Seiki Oshiro2-3/+3
The flag -z is only an alias for --format=null and even though --format and -z can be used together and repeated, only the last one is considered. Replace `[-z]` in the synopsis of git-repo-info by `[--format=... | -z]`, expliciting that the use of one of those flags replace the other. Signed-off-by: Lucas Seiki Oshiro <lucasseikioshiro@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2025-12-05repo: remove blank line from Documentation/git-repo.adocLucas Seiki Oshiro1-1/+0
There was an extra blank line in git-repo-structure documentation, which led to an unwawnted '+' character after generating an HTML or PDF from that page. This can be seen, for example, in Git 2.52.0 online docs [1]. Remove that extra line. [1] https://git-scm.com/docs/git-repo/2.52.0 Signed-off-by: Lucas Seiki Oshiro <lucasseikioshiro@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2025-12-05meson: use is_cross_build() where possibleToon Claes1-1/+1
In previous commit the first use of meson.can_run_host_binaries() was introduced. This is a guard around compiler.run() to ensure it's actually possible to execute the provided. In other places we've been having the same issue, but here `not meson.is_cross_build()` is used as guard. This does the trick, but it also prevents the code from running even when an exe_wrapper is configured. Switch to using meson.can_run_host_binaries() here as well. There is another place left that still uses `not meson.is_cross_build()`, but here it's a guard around fs.exists(). That function will always run on the build machine, so checking for cross-compilation is still in place here. Signed-off-by: Toon Claes <toon@iotcl.com> Acked-by: Patrick Steinhardt <ps@pks.im> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2025-12-05meson: only detect ICONV_OMITS_BOM if possibleToon Claes1-1/+1
In our Meson setup it automatically detects whether ICONV_OMITS_BOM should be defined. To check this, a piece of code is compiled and ran. When cross-compiling, it's not possible to run this piece of code. Guard this test with a can_run_host_binaries() check to ensure it can run. Signed-off-by: Toon Claes <toon@iotcl.com> Acked-by: Patrick Steinhardt <ps@pks.im> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2025-12-05meson: ignore subprojects/.wraplockToon Claes1-0/+1
When asking Meson to wrap subprojects, it generates a .wraplock file in the subprojects/ directory. Ignore this file. See also https://github.com/mesonbuild/meson/issues/14948. Signed-off-by: Toon Claes <toon@iotcl.com> Acked-by: Patrick Steinhardt <ps@pks.im> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2025-12-03last-modified: support sparse checkoutsJohannes Schindelin2-1/+10
In a sparse checkout, a user might want to run `last-modified` on a directory outside the worktree. And even in non-sparse checkouts, a user might need to run that command on a directory that does not exist in the worktree. These use cases should be supported via the `--` separator between revision and file arguments, which is even advertised in the documentation. This patch fixes a tiny bug that prevents that from working. This fixes https://github.com/git-for-windows/git/issues/5978 Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Acked-by: Derrick Stolee <stolee@gmail.com> Acked-by: Toon Claes <toon@iotcl.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2025-12-03doc: git-pull: fix 'git --rebase abort' typoJulia Evans1-2/+2
An earlier commit e9d221b0 (doc: git-pull: clarify how to exit a conflicted merge, 2025-10-15) misspelt `git rebase --abort` to `git --rebase abort`. Fix it. Signed-off-by: Julia Evans <julia@jvns.ca> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2025-12-03doc: remove stray text in Git data modelJulia Evans1-2/+0
I meant to delete this sentence fragment when rewriting this paragraph, but accidentally left it in. It's repetitive (since it was meant to be deleted) and it's causing some formatting issues with the note. Signed-off-by: Julia Evans <julia@jvns.ca> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2025-12-03branch: advice using git-help(1) instead of man(1)Kristoffer Haugsbakk3-5/+5
8fbd903e (branch: advise about ref syntax rules, 2024-03-05) added an advice about checking git-check-ref-format(1) for the ref syntax rules. The advice uses man(1). But git(1) is a multi-platform tool and man(1) may not be available on some platforms. It might also be slightly jarring to see a suggestion for running a command which is not from the Git suite. Let’s instead use git-help(1) in order to stay inside the land of git(1). This also means that `help.format` (for `man`, `html` or other formats) will be used if set. Also change to using single quotes (') to quote the command since that is more conventional. While here let’s also update the test to use `{SQ}`, which is more readable and easier to edit. Signed-off-by: Kristoffer Haugsbakk <code@khaugsbakk.name> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2025-11-30The fifth batchJunio C Hamano1-0/+11
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2025-11-30Merge branch 'jk/asan-bonanza'Junio C Hamano7-40/+122
Various issues detected by Asan have been corrected. * jk/asan-bonanza: t: enable ASan's strict_string_checks option fsck: avoid parse_timestamp() on buffer that isn't NUL-terminated fsck: remove redundant date timestamp check fsck: avoid strcspn() in fsck_ident() fsck: assert newline presence in fsck_ident() cache-tree: avoid strtol() on non-string buffer Makefile: turn on NO_MMAP when building with ASan pack-bitmap: handle name-hash lookups in incremental bitmaps compat/mmap: mark unused argument in git_munmap()
2025-11-30Merge branch 'je/doc-data-model'Junio C Hamano4-2/+311
Add a new manual that describes the data model. * je/doc-data-model: doc: add an explanation of Git's data model
2025-11-30Merge branch 'jc/whitespace-incomplete-line'Junio C Hamano9-88/+450
Both "git apply" and "git diff" learn a new whitespace error class, "incomplete-line". * jc/whitespace-incomplete-line: attr: enable incomplete-line whitespace error for this project diff: highlight and error out on incomplete lines apply: check and fix incomplete lines whitespace: allocate a few more bits and define WS_INCOMPLETE_LINE apply: revamp the parsing of incomplete lines diff: update the way rewrite diff handles incomplete lines diff: call emit_callback ecbdata everywhere diff: refactor output of incomplete line diff: keep track of the type of the last line seen diff: correct suppress_blank_empty hack diff: emit_line_ws_markup() if/else style fix whitespace: correct bit assignment comments
2025-11-30Merge branch 'ja/doc-synopsis-style'Junio C Hamano10-397/+419
Doc mark-up updates. * ja/doc-synopsis-style: doc: pull-fetch-param typofix doc: convert git push to synopsis style doc: convert git pull to synopsis style doc: convert git fetch to synopsis style
2025-11-30Merge branch 'lo/repo-info-all'Junio C Hamano3-21/+69
"git repo info" learned "--all" option. * lo/repo-info-all: repo: add --all to git-repo-info repo: factor out field printing to dedicated function
2025-11-30diff-index: don't queue unchanged filepairs with diff_change()René Scharfe3-7/+31
diff_cache() queues unchanged filepairs if the flag find_copies_harder is set, and uses diff_change() for that. This function allocates a filespec for each side, does a few other things that are unnecessary for unchanged filepairs and always sets the diff_flag has_changes, which is simply misleading in this case. Add a new streamlined function for queuing unchanged filepairs and use it in show_modified(), which is called by diff_cache() via oneway_diff() and do_oneway_diff(). It allocates only a single filespec for each filepair and uses it twice with reference counting. This has a measurable effect if there are a lot of them, like in the Linux repo: Benchmark 1: ./git_v2.52.0 -C ../linux diff --cached --find-copies-harder Time (mean ± σ): 31.8 ms ± 0.2 ms [User: 24.2 ms, System: 6.3 ms] Range (min … max): 31.5 ms … 32.3 ms 85 runs Benchmark 2: ./git -C ../linux diff --cached --find-copies-harder Time (mean ± σ): 23.9 ms ± 0.2 ms [User: 18.1 ms, System: 4.6 ms] Range (min … max): 23.5 ms … 24.4 ms 111 runs Summary ./git -C ../linux diff --cached --find-copies-harder ran 1.33 ± 0.01 times faster than ./git_v2.52.0 -C ../linux diff --cached --find-copies-harder Signed-off-by: René Scharfe <l.s.r@web.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2025-11-29last-modified: fix use of uninitialized memoryToon Claes1-1/+1
git-last-modified(1) uses a scratch bitmap to keep track of paths that have been changed between commits. To avoid reallocating a bitmap on each call of process_parent(), the scratch bitmap is kept and reused. Although, it seems an incorrect length is passed to memset(3). `struct bitmap` uses `eword_t` to for internal storage. This type is typedef'd to uint64_t. To fully zero the memory used by the bitmap, multiply the length (saved in `struct bitmap::word_alloc`) by the size of `eword_t`. Reported-by: Anders Kaseorg <andersk@mit.edu> Helped-by: Jeff King <peff@peff.net> Signed-off-by: Toon Claes <toon@iotcl.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2025-11-28Documentation/git-replay.adoc: fix errors around revision rangeElijah Newren2-8/+7
There was significant confusion in the git-replay manual about what constitutes a revision range. As noted in f302c1e4aa09 (revisions(7): clarify that most commands take a single revision range, 2021-05-18): Commands that are specifically designed to take two distinct ranges (e.g. "git range-diff R1 R2" to compare two ranges) do exist, but they are exceptions. Unless otherwise noted, all "git" commands that operate on a set of commits work on a single revision range. `git replay` is not an exception, but a few places in the manual were written as though it were. These appear to have come in revisions to the original series, between v3->v4 (see https://lore.kernel.org/git/CAP8UFD3bpLrVW97DH7j=V9H2GsTSAkksC9L3QujQERFk_kLnZA@mail.gmail.com/ , "More than one <revision-range> can be passed") and between v6->v7 (https://lore.kernel.org/git/20231115143327.2441397-1-christian.couder@gmail.com/, "Takes ranges of commits"), and I missed both of these revisions when reviewing. Fix them now. There was also a reference to the "Commit Limiting options below", but this page has no such section of options; strike the misleading reference. It is worth noting that we are documenting existing behavior, rather than optimal behavior. Junio has multiple times suggested introducing alternative ways to walk revisions and use them in `git replay --advance`, e.g. at * https://lore.kernel.org/git/xmqqy1mqo6kv.fsf@gitster.g/ * https://lore.kernel.org/git/xmqq8rb3is8c.fsf@gitster.g/ * https://lore.kernel.org/git/xmqqtsydj2zk.fsf@gitster.g/ (item (2)) If/when we introduce some new revision walking flag that implements one of these alternate types of revision walks, we can update the --advance option and this manual appropriately. Signed-off-by: Elijah Newren <newren@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2025-11-27xdiff: optimize patience diff's LCS searchYee Cheng Chin1-1/+4
The find_longest_common_sequence() function in patience diff is inefficient as it calls binary_search() for every unique line it encounters when deciding where to put it in the sequence. From instrumentation (using xctrace) on popular repositories, binary_search() takes up 50-60% of the run time within patience_diff() when performing a diff. To optimize this, add a boundary condition check before binary_search() is called to see if the encountered unique line is located after the entire currently tracked longest subsequence. If so, skip the unnecessary binary search and simply append the entry to the end of sequence. Given that most files compared in a diff are usually quite similar to each other, this condition is very common, and should be hit much more frequently than the binary search. Below are some end-to-end performance results by timing `git log --shortstat --oneline -500 --patience` on different repositories with the old and new code. Generally speaking this seems to give at least 8-10% speed up. The "binary search hit %" column describes how often the algorithm enters the binary search path instead of the new faster path. Even in the WebKit case we can see that it's quite rare (1.46%). | Repo | Speed difference | binary search hit % | |----------|------------------|---------------------| | vim | 1.27x | 0.01% | | pytorch | 1.16x | 0.02% | | cpython | 1.14x | 0.06% | | ripgrep | 1.14x | 0.03% | | git | 1.13x | 0.12% | | vscode | 1.09x | 0.10% | | WebKit | 1.08x | 1.46% | The benchmarks were done using hyperfine, on an Apple M1 Max laptop, with git compiled with `-O3 -flto`. Signed-off-by: Yee Cheng Chin <ychin.git@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2025-11-27t5564: fix test hang under zsh's sh modebrian m. carlson1-2/+2
This test starts a SOCKS server in Perl in the background and then kills it after the tests are done. However, when using zsh (in sh mode) in the tests, the start_socks function hangs until the background process is killed. Note that this does not reproduce in a simple shell script, so there is likely some interaction between job handling, our heavy use of eval in the test framework, and possibly other complexities of our test framework. What is clear, however, is that switching from a compound statement to a subshell fixes the problem entirely and the test passes with no problem, so do that. Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>