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Ravi Mistry 3507b40dc7 blame: ignore revs in HEAD:.git-blame-ignore-revs
git-blame(1) can ignore a list of commits specified via
--ignore-revs-file or the blame.ignoreRevsFile configuration option.
This is useful for skipping uninteresting revisions such as tree-wide
formatting changes, large-scale refactors, and code modernizations that
would otherwise obscure genuine historical authorship.

When revision-ignoring was introduced in commit ae3f36dea1 ("blame: add
blame.ignoreRevsFile config option", 2019-10-18), it intentionally
avoided adopting a default ignore file. At the time, the capability was
new and unproven, so avoiding unrequested filesystem I/O or unexpected
attribution shifts took priority over a project-wide default.
Requiring explicit opt-in per clone was therefore the prudent design.

Since then, maintaining a .git-blame-ignore-revs file in the repository
root has become the de facto standard across the Git ecosystem, adopted
by major hosting platforms (GitHub, GitLab, Gerrit) and prominent open
source projects (such as Chromium and LLVM). As a consequence,
developers frequently encounter a jarring mismatch: web interfaces
seamlessly ignore formatting commits, but local git-blame(1) and
git-annotate(1) runs do not, unless each user manually configures
blame.ignoreRevsFile for every local checkout.

Teach git-blame(1) and git-annotate(1) to automatically add the
HEAD:.git-blame-ignore-revs blob, if it exists, as the initial element
in the list of ignore-revs files in both bare and non-bare
repositories. Reading the committed blob from HEAD rather than the
working tree ensures that local runs match hosting platforms even when
an untracked .git-blame-ignore-revs file is present or a tracked one
has uncommitted local changes.

To ensure consistent precedence and override semantics:
- The default HEAD:.git-blame-ignore-revs entry is added before reading
  configuration and CLI options, preserving user and repository config
  overrides.
- In git_blame_config(), blame.ignoreRevsFile entries are appended via
  string_list_append() rather than inserted in sorted order via
  string_list_insert() so that configuration entries preserve their
  order relative to the initial default entry.
- The HEAD:.git-blame-ignore-revs tree entry is resolved quietly via
  get_oid_with_context(). Its mode is checked with S_ISREG() before
  reading the object so that non-regular tree entries (such as a
  committed symbolic link whose blob stores a target path rather than
  revision IDs, a subdirectory, or a gitlink) are skipped instead of
  being read and rejected as malformed object names. Its size is checked
  via odb_read_object_info() and capped at IGNORE_REVS_MAX_FILE_SIZE
  (100MB, matching ATTR_MAX_FILE_SIZE from 3c50032ff5 ("attr: ignore
  overly large gitattributes files", 2022-12-01)) so an oversized blob
  is skipped with a warning without being loaded into memory. The blob
  is parsed in memory via a new oidset_parse_buffer_carefully() helper
  in oidset.c that shares line parsing with
  oidset_parse_file_carefully().
- In build_ignorelist(), ignore-revs entries are processed starting
  after the last empty string entry. This ensures setting
  blame.ignoreRevsFile to "" or passing --ignore-revs-file "" or
  --no-ignore-revs-file cleanly discards the default blob without
  attempting to read or parse it, allowing users to bypass a malformed
  default blob.

Update documentation in blame-options.adoc and config/blame.adoc, and
add comprehensive test coverage in t8013 for the default blob lookup,
subdirectory invocations, bare repositories, uncommitted and untracked
working-tree files, CLI and config overrides, committed symlink
entries, overly large blobs, and comments and whitespace handling.

Based-on-patch-by: Abhijeetsingh Meena <abhijeet040403@gmail.com>
Helped-by: Kristoffer Haugsbakk <code@khaugsbakk.name>
Helped-by: Phillip Wood <phillip.wood@dunelm.org.uk>
Helped-by: Eric Sunshine <sunshine@sunshineco.com>
Signed-off-by: Ravi Mistry <rmistry@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2026-10-12 12:58:54 -07:00
.github Merge branch 'js/rust-in-windows-ci' 2026-09-16 09:04:55 -07:00
Documentation blame: ignore revs in HEAD:.git-blame-ignore-revs 2026-10-12 12:58:54 -07:00
bin-wrappers
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block-sha1
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builtin blame: ignore revs in HEAD:.git-blame-ignore-revs 2026-10-12 12:58:54 -07:00
ci Merge branch 'js/gitlab-ci-windows-rust' 2026-10-06 10:13:31 -07:00
compat Merge branch 'yt/winansi-die-lasterr-fix' 2026-10-05 13:52:28 -07:00
compiler-tricks
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contrib Merge branch 'yn/worktree-repair-completion' 2026-10-05 13:52:29 -07:00
ewah
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git-gui
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gitk-git Merge branch 'master' of https://github.com/j6t/gitk 2026-09-11 09:03:58 -07:00
gitweb
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mergetools
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negotiator
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odb Merge branch 'ps/odb-alternates-at-creation' 2026-10-01 11:26:39 -07:00
oss-fuzz oss-fuzz: handle reftable iterator initialization failures 2026-09-17 12:43:47 -07:00
perl
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po l10n: af: fix review comments 2026-09-27 20:41:50 +08:00
refs Merge branch 'ak/refs-files-root-ref-lock' 2026-10-01 11:26:40 -07:00
reftable Merge branch 'kn/reftable-optimize-reloading' 2026-09-07 09:32:05 -07:00
sha1
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sha1collisiondetection@855827c583
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sha1dc
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sha256
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src rust: respect CARGO_BUILD_TARGET when locating build output 2026-09-10 06:37:09 -07:00
subprojects
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t blame: ignore revs in HEAD:.git-blame-ignore-revs 2026-10-12 12:58:54 -07:00
templates
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tools Merge branch 'jc/cocci-free-updates' 2026-10-01 11:26:40 -07:00
trace2
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xdiff
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.gitignore Makefile: precompile "git-compat-util.h" 2026-09-15 09:18:06 -07:00
.gitlab-ci.yml Merge branch 'js/gitlab-ci-windows-rust' 2026-10-06 10:13:31 -07:00
.gitmodules
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.mailmap mailmap: normalize name for Yoichi NAKAYAMA 2026-09-17 09:43:13 -07:00
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CODE_OF_CONDUCT.md
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COPYING
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Cargo.toml
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GIT-BUILD-OPTIONS.in
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GIT-VERSION-FILE.in
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GIT-VERSION-GEN Start Git 2.98 cycle 2026-10-01 11:28:16 -07:00
INSTALL
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LGPL-2.1
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Makefile Merge branch 'sg/precompile-git-compat-util' 2026-10-03 21:45:54 -07:00
README.md
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RelNotes Start Git 2.98 cycle 2026-10-01 11:28:16 -07:00
SECURITY.md
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abspath.c
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abspath.h
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aclocal.m4
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add-interactive.c
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add-interactive.h
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add-patch.c
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advice.c history: protect branches when squashing a range 2026-09-08 13:51:10 -07:00
advice.h history: protect branches when squashing a range 2026-09-08 13:51:10 -07:00
alias.c
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alloc.c
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alloc.h
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apply.c
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apply.h
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archive-zip.c
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archive.c
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blame.c
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branch.c
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branch.h
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build.rs
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builtin.h
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bundle-uri.c
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bundle-uri.h
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bundle.c
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bundle.h
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cache-tree.c cache-tree: remove dependency on `the_repository` 2026-09-11 08:46:09 -07:00
cache-tree.h cache-tree: remove dependency on `the_repository` 2026-09-11 08:46:09 -07:00
cbtree.c
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checkout.c
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chunk-format.c
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chunk-format.h
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color.c
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color.h
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column.c
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column.h
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combine-diff.c
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command-list.txt doc: git: list gitdatamodel(7) as a concept guide 2026-09-05 17:37:49 -07:00
commit-graph.c
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commit-graph.h
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commit-reach.c Merge branch 'of/commit-reach-repo-awareness' 2026-10-03 21:45:54 -07:00
commit-reach.h Merge branch 'of/commit-reach-repo-awareness' 2026-10-03 21:45:54 -07:00
commit-slab-decl.h
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commit.c
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commit.h
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common-exit.c
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common-init.c
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common-init.h
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common-main.c
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config.c config: add git_config_append_parameter() 2026-09-17 12:37:00 -07:00
config.h config: add git_config_append_parameter() 2026-09-17 12:37:00 -07:00
config.mak.dev
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config.mak.in
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config.mak.uname Merge branch 'js/rust-in-windows-ci' 2026-09-16 09:04:55 -07:00
configure.ac core: convert build-time USE_NSEC into runtime core.useNanosec 2026-09-11 11:10:01 -07:00
connect.c
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connect.h
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connected.c
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diff-merges.c
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diff-no-index.c diff --no-index: fix -R with file/directory conflicts 2026-09-21 10:59:36 -07:00
diff.c
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dir.c Merge branch 'rs/dir-skip-nested-repo-fix' 2026-10-05 13:52:29 -07:00
dir.h
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editor.c
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editor.h
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entry.c
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entry.h
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environment.c core: convert build-time USE_NSEC into runtime core.useNanosec 2026-09-11 11:10:01 -07:00
environment.h Merge branch 'dk/use-nsec-runtime' 2026-10-01 11:26:41 -07:00
exec-cmd.c
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fetch-negotiator.c
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fetch-pack.c Merge branch 'of/commit-reach-repo-awareness' 2026-10-03 21:45:54 -07:00
fetch-pack.h
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fmt-merge-msg.c
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fmt-merge-msg.h
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for-each-ref.h
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fsck.c
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fsmonitor--daemon.h
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fsmonitor-ipc.c
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fsmonitor-ipc.h
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fsmonitor-ll.h
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fsmonitor-path-utils.h
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fsmonitor-settings.c
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fsmonitor-settings.h
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fsmonitor.c
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fsmonitor.h
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gettext.c
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gettext.h
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git-archimport.perl
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git-compat-util.h
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git-curl-compat.h http: handle curl stripping creds from effective url 2026-09-28 10:49:29 -07:00
git-cvsexportcommit.perl
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git-cvsimport.perl
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git-cvsserver.perl
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git-difftool--helper.sh
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git-filter-branch.sh
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git-instaweb.sh
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git-merge-octopus.sh
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git-merge-one-file.sh
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git-merge-resolve.sh
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git-mergetool--lib.sh
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git-mergetool.sh
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git-p4.py
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git-quiltimport.sh
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git-request-pull.sh
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git-send-email.perl
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git-sh-i18n.sh
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git-sh-setup.sh
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git-submodule.sh builtin/submodule: rename "--ref-format=" to "--ref-storage-format=" 2026-09-09 11:04:30 -07:00
git-svn.perl
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git-web--browse.sh
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git-zlib.c
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git-zlib.h
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git.c Merge branch 'ty/repository-fetch-if-missing' 2026-09-02 09:21:59 -07:00
git.rc.in
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gpg-interface.c gpg-interface: make signature-prefix matching length-aware 2026-09-17 12:43:46 -07:00
gpg-interface.h
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graph.c
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graph.h
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grep.c
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grep.h
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hash-lookup.c
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hash-lookup.h
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hash.c
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hash.h
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hashmap.c
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hashmap.h
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help.c help: rename "default-ref-format" to "default-ref-storage-format" 2026-09-09 11:04:31 -07:00
help.h
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hex-ll.c
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hex-ll.h
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hex.c
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hex.h
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hook.c
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hook.h
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http-backend.c
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http-fetch.c
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http-push.c
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http-walker.c
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http.c http: handle curl stripping creds from effective url 2026-09-28 10:49:29 -07:00
http.h
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ident.c
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ident.h
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imap-send.c Merge branch 'wf/imap-send-draft' 2026-09-14 14:02:52 -07:00
iterator.h
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json-writer.c
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json-writer.h
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khash.h
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kwset.c
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levenshtein.c
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line-log.c
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line-range.c
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line-range.h
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linear-assignment.c
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linear-assignment.h
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list-objects-filter-options.c
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list-objects-filter-options.h
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list-objects-filter.c
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list-objects-filter.h
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list-objects.c
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list.h
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lockfile.c
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mailinfo.c
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merge-ll.c Merge branch 'jk/merge-ll-tempfile-cleanup' 2026-10-06 10:13:31 -07:00
merge-ll.h
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merge-ort-wrappers.c
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meson.build Merge branch 'js/mingw-build-updates' 2026-09-11 09:45:10 -07:00
meson_options.txt Merge branch 'dk/use-nsec-runtime' 2026-10-01 11:26:41 -07:00
midx-write.c
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midx.c midx: validate incremental MIDX pack IDs 2026-09-17 12:43:46 -07:00
midx.h
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name-hash.c
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name-hash.h
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notes-cache.c
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notes-cache.h
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notes-merge.c
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notes-merge.h
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notes-utils.c
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notes-utils.h
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notes.c
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notes.h
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object-file-convert.c
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object-file-convert.h
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object-file.c object-file: flush transaction packfile before migrating objects 2026-09-23 20:02:43 -07:00
object-file.h
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object-name.c
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object-name.h
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object.c
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object.h history: create squashed commits without editing 2026-09-08 13:51:10 -07:00
odb.c Merge branch 'ps/odb-alternates-at-creation' 2026-10-01 11:26:39 -07:00
odb.h Merge branch 'ps/odb-alternates-at-creation' 2026-10-01 11:26:39 -07:00
oid-array.c
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oid-array.h
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oidmap.c
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oidmap.h
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oidset.c blame: ignore revs in HEAD:.git-blame-ignore-revs 2026-10-12 12:58:54 -07:00
oidset.h blame: ignore revs in HEAD:.git-blame-ignore-revs 2026-10-12 12:58:54 -07:00
oidtree.c
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oidtree.h
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pack-bitmap-write.c
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pack-bitmap.c builtin/fsck: move bitmap verification into the packed source 2026-09-11 09:14:44 -07:00
pack-bitmap.h builtin/fsck: move bitmap verification into the packed source 2026-09-11 09:14:44 -07:00
pack-check.c
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pack-mtimes.c
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pack-mtimes.h
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pack-objects.c
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pack-objects.h
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pack-refs.c
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pack-revindex.c
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pack-write.c
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pack.h
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packfile-list.c
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packfile-list.h
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packfile.c
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packfile.h
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pager.c
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pager.h
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parallel-checkout.c
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parallel-checkout.h
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parse-options-cb.c
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parse-options.c parse-options: allow for hidden aliases 2026-09-09 11:04:30 -07:00
parse-options.h parse-options: allow for hidden aliases 2026-09-09 11:04:30 -07:00
parse.c
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parse.h
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patch-delta.c
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patch-ids.c
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path-walk.c
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path-walk.h
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path.c
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pathspec.c Merge branch 'jc/pathspec-match-const' 2026-09-13 21:53:29 -07:00
pathspec.h pathspec: match and original in pathspec_item are const 2026-09-03 11:24:01 -07:00
pkt-line.c
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pkt-line.h
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preload-index.c
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preload-index.h
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pretty.c
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pretty.h
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prio-queue.c
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prio-queue.h
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progress.c
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progress.h
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promisor-remote.c
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promisor-remote.h
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prompt.c
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prompt.h
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protocol-caps.c
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protocol-caps.h
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protocol.c
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protocol.h
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pseudo-merge.c
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quote.c
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range-diff.c
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reachable.c
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reachable.h
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read-cache-ll.h cache-tree: remove dependency on `the_repository` 2026-09-11 08:46:09 -07:00
read-cache.c Merge branch 'dk/use-nsec-runtime' 2026-10-01 11:26:41 -07:00
read-cache.h
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rebase-interactive.c
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rebase-interactive.h
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rebase.c
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rebase.h
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ref-filter.c
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ref-filter.h
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reflog-walk.c
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reflog-walk.h
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reflog.c
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reflog.h reflog: fix default expiry periods 2026-09-24 11:22:13 -07:00
refs.c refs: expose function to parse reference URIs 2026-09-09 11:04:31 -07:00
refs.h refs: expose function to parse reference URIs 2026-09-09 11:04:31 -07:00
refspec.c
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refspec.h
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remote-curl.c
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remote.c Merge branch 'as/push-force-if-includes-no-reflog' 2026-10-06 10:13:31 -07:00
remote.h
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repack-cruft.c
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repack-filtered.c
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repack-geometry.c
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repack-midx.c
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repack-promisor.c
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repack.c
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replace-object.c
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replay.c Merge branch 'en/midx-missing-pack-fallback' 2026-09-10 05:36:17 -07:00
replay.h
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repo-settings.c
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repo-settings.h
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repository.c Merge branch 'jk/submodule-error-leak' 2026-09-13 21:53:29 -07:00
repository.h
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rerere.c rerere: do not record failed conflict resolution data 2026-09-17 12:43:46 -07:00
rerere.h builtin/maintenance: improve heuristic for "rerere gc" 2026-09-04 07:27:14 -07:00
reset.c
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resolve-undo.c
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resolve-undo.h
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revision.c Merge branch 'jk/parse-revision-opt-fixes' 2026-10-05 13:52:29 -07:00
revision.h
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run-command.c
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run-command.h
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sane-ctype.h
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scalar.c
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send-pack.c
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sequencer.c Merge branch 'tb/rerere-lock-grace' 2026-10-05 13:52:28 -07:00
sequencer.h Merge branch 'hn/history-squash' 2026-10-01 11:26:39 -07:00
serve.c
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serve.h
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server-info.c
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server-info.h
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setup.c Merge branch 'ps/ref-storage-format' 2026-10-01 11:26:40 -07:00
setup.h Merge branch 'ps/ref-storage-format' 2026-10-01 11:26:40 -07:00
sh-i18n--envsubst.c
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sha1dc_git.c
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sha1dc_git.h
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shallow.c
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shallow.h
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shared.mak
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shell.c
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shortlog.h
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sideband.c
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sideband.h
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sigchain.c
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sigchain.h
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simple-ipc.h
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sparse-index.c cache-tree: drop `the_repository` in `cache_tree_fully_valid()` 2026-09-11 08:46:09 -07:00
sparse-index.h
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split-index.c
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split-index.h
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stable-qsort.c
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stash.h stash: reserve exit status 1 for conflicts 2026-09-03 11:32:36 -07:00
statinfo.c core: convert build-time USE_NSEC into runtime core.useNanosec 2026-09-11 11:10:01 -07:00
statinfo.h
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strbuf.c
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strbuf.h
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string-list.c
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string-list.h
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strmap.c
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strmap.h
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strvec.c
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strvec.h
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sub-process.c
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sub-process.h
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submodule-config.c submodule-config: stop registering submodule sources 2026-09-11 08:46:10 -07:00
submodule-config.h submodule-config: remove uses of `the_repository` 2026-09-11 08:46:10 -07:00
submodule.c submodule-config: remove uses of `the_repository` 2026-09-11 08:46:10 -07:00
submodule.h
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symlinks.c
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symlinks.h
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tag.c
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tag.h
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tar.h
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tempfile.c
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tempfile.h
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thread-utils.c
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thread-utils.h
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tmp-objdir.c tmp-objdir: drop unused function to register alternate 2026-09-11 08:46:10 -07:00
tmp-objdir.h tmp-objdir: drop unused function to register alternate 2026-09-11 08:46:10 -07:00
trace.c
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trace.h
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README.md

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Git - fast, scalable, distributed revision control system

Git is a fast, scalable, distributed revision control system with an unusually rich command set that provides both high-level operations and full access to internals.

Git is an Open Source project covered by the GNU General Public License version 2 (some parts of it are under different licenses, compatible with the GPLv2). It was originally written by Linus Torvalds with help of a group of hackers around the net.

Please read the file INSTALL for installation instructions.

Many Git online resources are accessible from https://git-scm.com/ including full documentation and Git related tools.

See Documentation/gittutorial.adoc to get started, then see Documentation/giteveryday.adoc for a useful minimum set of commands, and Documentation/git-<commandname>.adoc for documentation of each command. If git has been correctly installed, then the tutorial can also be read with man gittutorial or git help tutorial, and the documentation of each command with man git-<commandname> or git help <commandname>.

CVS users may also want to read Documentation/gitcvs-migration.adoc (man gitcvs-migration or git help cvs-migration if git is installed).

The user discussion and development of Git take place on the Git mailing list -- everyone is welcome to post bug reports, feature requests, comments and patches to git@vger.kernel.org (read Documentation/SubmittingPatches for instructions on patch submission and Documentation/CodingGuidelines).

Those wishing to help with error message, usage and informational message string translations (localization l10) should see po/README.md (a po file is a Portable Object file that holds the translations).

To subscribe to the list, send an email to git+subscribe@vger.kernel.org (see https://subspace.kernel.org/subscribing.html for details). The mailing list archives are available at https://lore.kernel.org/git/, https://marc.info/?l=git and other archival sites.

Issues which are security relevant should be disclosed privately to the Git Security mailing list git-security@googlegroups.com.

The maintainer frequently sends the "What's cooking" reports that list the current status of various development topics to the mailing list. The discussion following them give a good reference for project status, development direction and remaining tasks.

The name "git" was given by Linus Torvalds when he wrote the very first version. He described the tool as "the stupid content tracker" and the name as (depending on your mood):

  • random three-letter combination that is pronounceable, and not actually used by any common UNIX command. The fact that it is a mispronunciation of "get" may or may not be relevant.
  • stupid. contemptible and despicable. simple. Take your pick from the dictionary of slang.
  • "global information tracker": you're in a good mood, and it actually works for you. Angels sing, and a light suddenly fills the room.
  • "goddamn idiotic truckload of sh*t": when it breaks