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Git with broken hash generation to generate collisions between object IDs. Don't use this! https://undefinedbehavior.de/posts/commit-vandalism/
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d2d7fbe129
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Jeff King d2d7fbe129 diff: discard blob data from stat-unmatched pairs 
When performing a tree-level diff against the working tree, we may find
that our index stat information is dirty, so we queue a filepair to be
examined later. If the actual content hasn't changed, we call this a
stat-unmatch; the stat information was out of date, but there's no
actual diff.  Normally diffcore_std() would detect and remove these
identical filepairs via diffcore_skip_stat_unmatch().  However, when
"--quiet" is used, we want to stop the diff as soon as we see any
changes, so we check for stat-unmatches immediately in diff_change().

That check may require us to actually load the file contents into the
pair of diff_filespecs. If we find that the pair isn't a stat-unmatch,
then no big deal; we'd likely load the contents later anyway to generate
a patch, do rename detection, etc, so we want to hold on to it. But if
it is a stat-unmatch, then we have no more use for that data; the whole
point is that we're going discard the pair. However, we never free the
allocated diff_filespec data.

In most cases, keeping that data isn't a problem. We don't expect a lot
of stat-unmatch entries, and since we're using --quiet, we'd quit as
soon as we saw such a real change anyway. However, there are extreme
cases where it makes a big difference:

  1. We'd generally mmap() the working tree half of the pair. And since
     the OS may limit the total number of maps, we can run afoul of this
     in large repositories. E.g.:

       $ cd linux
       $ git ls-files | wc -l
       67959
       $ sysctl vm.max_map_count
       vm.max_map_count = 65530
       $ git ls-files | xargs touch ;# everything is stat-dirty!
       $ git diff --quiet
       fatal: mmap failed: Cannot allocate memory

     It should be unusual to have so many files stat-dirty, but it's
     possible if you've just run a script like "sed -i" or similar.

     After this patch, the above correctly exits with code 0.

  2. Even if you don't hit mmap limits, the index half of the pair will
     have been pulled from the object database into heap memory. Again
     in a clone of linux.git, running:

       $ git ls-files | head -n 10000 | xargs touch
       $ git diff --quiet

     peaks at 145MB heap before this patch, and 94MB after.

This patch solves the problem by freeing any diff_filespec data we
picked up during the "--quiet" stat-unmatch check in diff_changes.
Nobody is going to need that data later, so there's no point holding on
to it. There are a few things to note:

  - we could skip queueing the pair entirely, which could in theory save
    a little work. But there's not much to save, as we need a
    diff_filepair to feed to diff_filespec_check_stat_unmatch() anyway.
    And since we cache the result of the stat-unmatch checks, a later
    call to diffcore_skip_stat_unmatch() call will quickly skip over
    them. The diffcore code also counts up the number of stat-unmatched
    pairs as it removes them. It's doubtful any callers would care about
    that in combination with --quiet, but we'd have to reimplement the
    logic here to be on the safe side. So it's not really worth the
    trouble.

  - I didn't write a test, because we always produce the correct output
    unless we run up against system mmap limits, which are both
    unportable and expensive to test against. Measuring peak heap
    would be interesting, but our perf suite isn't yet capable of that.

  - note that diff without "--quiet" does not suffer from the same
    problem. In diffcore_skip_stat_unmatch(), we detect the stat-unmatch
    entries and drop them immediately, so we're not carrying their data
    around.

  - you _can_ still trigger the mmap limit problem if you truly have
    that many files with actual changes. But it's rather unlikely. The
    stat-unmatch check avoids loading the file contents if the sizes
    don't match, so you'd need a pretty trivial change in every single
    file. Likewise, inexact rename detection might load the data for
    many files all at once. But you'd need not just 64k changes, but
    that many deletions and additions. The most likely candidate is
    perhaps break-detection, which would load the data for all pairs and
    keep it around for the content-level diff. But again, you'd need 64k
    actually changed files in the first place.

    So it's still possible to trigger this case, but it seems like "I
    accidentally made all my files stat-dirty" is the most likely case
    in the real world.

Reported-by: Jan Christoph Uhde <Jan@UhdeJc.com>
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-06-02 09:28:56 -07:00
.github point pull requesters to GitGitGadget 2019-03-13 11:07:50 +09:00
block-sha1
builtin Merge branch 'hi/gpg-use-check-signature' into maint 2020-03-17 15:02:23 -07:00
ci Merge branch 'js/ci-windows-update' 2020-03-05 10:43:04 -08:00
compat Merge branch 'js/mingw-open-in-gdb' into maint 2020-03-17 15:02:25 -07:00
contrib Merge branch 'kk/complete-diff-color-moved' 2020-03-09 11:21:20 -07:00
Documentation RelNotes/2.26.0: fix various typos 2020-03-18 15:42:37 -07:00
ewah Merge branch 'jk/object-filter-with-bitmap' 2020-03-02 15:07:18 -08:00
git-gui Merge https://github.com/prati0100/git-gui 2020-03-19 16:06:51 -07:00
gitk-git Merge gitk to pick up emergency build fix 2019-09-17 14:59:18 -07:00
gitweb Merge branch 'do/gitweb-typofix-in-comments' 2020-01-08 12:44:11 -08:00
mergetools mergetools: add support for smerge (Sublime Merge) 2019-04-04 18:21:25 +09:00
negotiator
perl Fix spelling errors in documentation outside of Documentation/ 2019-11-07 13:42:00 +09:00
po l10n: tr.po: change file mode to 644 2020-03-21 18:26:56 +08:00
ppc *.[ch]: manually align parameter lists 2019-05-05 15:20:10 +09:00
refs C: use skip_prefix() to avoid hardcoded string length 2020-01-31 13:03:45 -08:00
sha1collisiondetection@855827c583 sha1dc: update from upstream 2019-05-14 16:45:01 +09:00
sha1dc Merge branch 'jk/lore-is-the-archive' 2019-12-06 15:09:23 -08:00
sha256
t Merge branch 'en/rebase-backend' 2020-03-21 13:48:54 -07:00
templates Merge branch 'kw/fsmonitor-watchman-racefix' 2020-02-14 12:54:20 -08:00
trace2 Merge branch 'en/doc-typofix' 2019-12-01 09:04:35 -08:00
vcs-svn *.[ch]: manually align parameter lists 2019-05-05 15:20:10 +09:00
xdiff Merge branch 'rs/xdiff-ignore-ws-w-func-context' 2019-12-16 13:08:32 -08:00
.cirrus.yml CI: add FreeBSD CI support via Cirrus-CI 2019-12-20 12:09:12 -08:00
.clang-format clang-format: use git grep to generate the ForEachMacros list 2019-06-04 14:50:40 -07:00
.editorconfig editorconfig: indent text files with tabs 2020-01-06 08:46:32 -08:00
.gitattributes Fix build with core.autocrlf=true 2019-09-24 19:48:27 +05:30
.gitignore sparse-checkout: create builtin with 'list' subcommand 2019-11-22 16:11:43 +09:00
.gitmodules
.mailmap Merge branch 'bc/wildcard-credential' 2020-03-05 10:43:02 -08:00
.travis.yml travis-ci: build with GCC 4.8 as well 2019-07-19 14:06:01 -07:00
.tsan-suppressions replace-object: make replace operations thread-safe 2020-01-17 13:52:14 -08:00
abspath.c
aclocal.m4
add-interactive.c Merge branch 'js/builtin-add-i-cmds' into maint 2020-03-17 15:02:20 -07:00
add-interactive.h built-in add -p: respect the interactive.singlekey config setting 2020-01-15 12:06:17 -08:00
add-patch.c built-in add -p: respect the interactive.singlekey config setting 2020-01-15 12:06:17 -08:00
advice.c add: change advice config variables used by the add API 2020-02-06 11:08:00 -08:00
advice.h add: change advice config variables used by the add API 2020-02-06 11:08:00 -08:00
alias.c
alias.h
alloc.c object_as_type: initialize commit-graph-related fields of 'struct commit' 2019-01-27 16:55:57 -08:00
alloc.h object_as_type: initialize commit-graph-related fields of 'struct commit' 2019-01-27 16:55:57 -08:00
apply.c sha1-file: pass git_hash_algo to hash_object_file() 2020-01-31 10:45:39 -08:00
apply.h apply.h: include missing header 2019-09-28 14:04:16 +09:00
archive-tar.c streaming: allow open_istream() to handle any repo 2020-01-31 10:45:39 -08:00
archive-zip.c streaming: allow open_istream() to handle any repo 2020-01-31 10:45:39 -08:00
archive.c tree-walk.c: remove the_repo from get_tree_entry() 2019-06-27 12:45:17 -07:00
archive.h Merge branch 'dl/no-extern-in-func-decl' 2019-05-13 23:50:32 +09:00
argv-array.c argv-array: add space after while 2019-11-20 13:29:02 +09:00
argv-array.h argv-array: move doc to argv-array.h 2019-11-18 15:21:29 +09:00
attr.c attr: move doc to attr.h 2019-11-18 15:21:28 +09:00
attr.h attr: move doc to attr.h 2019-11-18 15:21:28 +09:00
azure-pipelines.yml Azure Pipeline: switch to the latest agent pools 2020-02-27 09:58:43 -08:00
banned.h banned.h: fix vsprintf()'s ban message 2019-08-26 10:32:45 -07:00
base85.c
bisect.c bisect: libify bisect_next_all 2020-02-19 09:37:15 -08:00
bisect.h bisect: libify bisect_next_all 2020-02-19 09:37:15 -08:00
blame.c Merge branch 'ew/hashmap' 2019-10-15 13:48:02 +09:00
blame.h blame: provide type of fingerprints pointer 2020-02-24 12:08:48 -08:00
blob.c object: convert create_object() to use object_id 2019-06-20 10:20:51 -07:00
blob.h
branch.c Merge branch 'nd/switch-and-restore' 2019-07-09 15:25:44 -07:00
branch.h Merge branch 'nd/switch-and-restore' 2019-07-09 15:25:44 -07:00
builtin.h sparse-checkout: create builtin with 'list' subcommand 2019-11-22 16:11:43 +09:00
bulk-checkin.c bulk-checkin: zero-initialize hashfile_checkpoint 2019-09-06 11:03:39 -07:00
bulk-checkin.h *.[ch]: manually align parameter lists 2019-05-05 15:20:10 +09:00
bundle.c bundle-create: progress output control 2019-11-11 11:46:28 +09:00
bundle.h bundle-create: progress output control 2019-11-11 11:46:28 +09:00
cache-tree.c sha1-file: pass git_hash_algo to hash_object_file() 2020-01-31 10:45:39 -08:00
cache-tree.h cache-tree: share code between functions writing an index as a tree 2019-08-19 10:08:03 -07:00
cache.h Merge branch 'mt/use-passed-repo-more-in-funcs' 2020-02-14 12:54:22 -08:00
chdir-notify.c
chdir-notify.h
check_bindir
check-builtins.sh
checkout.c
checkout.h *.[ch]: manually align parameter lists 2019-05-05 15:20:10 +09:00
CODE_OF_CONDUCT.md CODE_OF_CONDUCT: mention individual project-leader emails 2019-10-10 10:41:46 +09:00
color.c color.c: alias RGB colors 8-15 to aixterm colors 2020-02-11 11:19:00 -08:00
color.h
column.c column: use utf8_strnwidth() to strip out ANSI color escapes 2019-10-15 10:54:15 +09:00
column.h *.[ch]: manually align parameter lists 2019-05-05 15:20:10 +09:00
combine-diff.c combine-diff: replace GIT_SHA1_HEXSZ with the_hash_algo 2019-08-19 15:04:58 -07:00
command-list.txt Merge branch 'ds/sparse-cone' 2019-12-25 11:21:58 -08:00
commit-graph.c Merge branch 'rs/commit-graph-code-simplification' 2020-03-05 10:43:04 -08:00
commit-graph.h commit-graph.h: use odb in 'load_commit_graph_one_fd_st' 2020-02-04 11:36:51 -08:00
commit-reach.c commit-graph: fix writing first commit-graph during fetch 2019-10-25 11:19:16 +09:00
commit-reach.h Merge branch 'sb/more-repo-in-api' 2019-02-05 14:26:09 -08:00
commit-slab-decl.h
commit-slab-impl.h
commit-slab.h
commit.c Merge branch 'rs/strbuf-insertstr' 2020-02-17 13:22:17 -08:00
commit.h gpg-interface: add minTrustLevel as a configuration option 2020-01-15 14:06:06 -08:00
common-main.c common-main: delay trace2 initialization 2019-08-06 13:09:01 -07:00
config.c Merge branch 'bw/remote-rename-update-config' 2020-02-25 11:18:32 -08:00
config.h config: provide access to the current line number 2020-02-10 10:52:10 -08:00
config.mak.dev config.mak.dev: re-enable -Wformat-zero-length 2020-02-28 08:39:45 -08:00
config.mak.in
config.mak.uname Sync with 2.23.1 2019-12-06 16:31:39 +01:00
configure.ac Merge branch 'dd/sequencer-utf8' 2019-12-01 09:04:36 -08:00
connect.c Sync with 2.23.1 2019-12-06 16:31:39 +01:00
connect.h *.[ch]: manually align parameter lists 2019-05-05 15:20:10 +09:00
connected.c connected: verify promisor-ness of partial clone 2020-01-30 10:55:31 -08:00
connected.h connected: verify promisor-ness of partial clone 2020-01-30 10:55:31 -08:00
convert.c Merge branch 'mt/use-passed-repo-more-in-funcs' 2020-02-14 12:54:22 -08:00
convert.h am: reload .gitattributes after patching it 2019-09-03 15:16:18 -07:00
copy.c
COPYING
credential-cache--daemon.c
credential-cache.c
credential-store.c strbuf: give URL-encoding API a char predicate fn 2019-06-28 08:41:53 -07:00
credential.c credential: allow wildcard patterns when matching config 2020-02-20 13:05:43 -08:00
credential.h Merge branch 'bc/wildcard-credential' 2020-03-05 10:43:02 -08:00
csum-file.c
csum-file.h csum-file: introduce hashfile_total() 2020-01-23 10:51:50 -08:00
ctype.c
daemon.c Fix spelling errors in code comments 2019-11-10 16:00:54 +09:00
date.c date.c: switch to reentrant {gm,local}time_r 2019-11-30 13:50:48 -08:00
decorate.c hashmap: convert sha1hash() to oidhash() 2019-06-20 10:44:22 -07:00
decorate.h *.[ch]: remove extern from function declarations using spatch 2019-05-05 15:20:06 +09:00
delta-islands.c Merge branch 'jk/oidhash' 2019-07-09 15:25:43 -07:00
delta-islands.h delta-islands: respect progress flag 2019-06-20 13:29:49 -07:00
delta.h *.[ch]: manually align parameter lists 2019-05-05 15:20:10 +09:00
detect-compiler
diff-delta.c diff-delta: set size out-parameter to 0 for NULL delta 2019-09-06 11:03:39 -07:00
diff-lib.c mark_fsmonitor_valid(): mark the index as changed if needed 2019-05-28 12:43:43 -07:00
diff-no-index.c Merge branch 'nd/diff-parseopt-4' 2019-04-25 16:41:12 +09:00
diff.c diff: discard blob data from stat-unmatched pairs 2020-06-02 09:28:56 -07:00
diff.h Merge branch 'hw/doc-in-header' 2019-12-16 13:08:39 -08:00
diffcore-break.c diffcore-break: use a goto instead of a redundant if statement 2019-10-02 15:04:21 +09:00
diffcore-delta.c
diffcore-order.c
diffcore-pickaxe.c Merge branch 'nd/the-index' into md/list-objects-filter-by-depth 2019-01-15 15:38:29 -08:00
diffcore-rename.c sha1-file: pass git_hash_algo to hash_object_file() 2020-01-31 10:45:39 -08:00
diffcore.h diff: move doc to diff.h and diffcore.h 2019-11-18 15:21:28 +09:00
dir-iterator.c dir-iterator: add flags parameter to dir_iterator_begin 2019-07-11 13:52:15 -07:00
dir-iterator.h dir-iterator: add flags parameter to dir_iterator_begin 2019-07-11 13:52:15 -07:00
dir.c Merge branch 'ds/sparse-add' 2020-03-05 10:43:02 -08:00
dir.h Merge branch 'ds/sparse-cone' 2019-12-25 11:21:58 -08:00
editor.c pager: add a helper function to clear the last line in the terminal 2019-06-24 13:38:46 -07:00
entry.c fill_stat_cache_info(): prepare for an fsmonitor fix 2019-05-28 12:43:42 -07:00
environment.c Merge branch 'ds/sparse-cone' 2019-12-25 11:21:58 -08:00
exec-cmd.c trace2: create new combined trace facility 2019-02-22 15:27:59 -08:00
exec-cmd.h *.[ch]: remove extern from function declarations using sed 2019-05-05 15:20:08 +09:00
fast-import.c Sync with 2.23.1 2019-12-06 16:31:39 +01:00
fetch-negotiator.c repo-settings: create feature.experimental setting 2019-08-13 13:33:55 -07:00
fetch-negotiator.h repo-settings: create feature.experimental setting 2019-08-13 13:33:55 -07:00
fetch-pack.c Merge branch 'ec/fetch-mark-common-refs-trace2' 2019-12-05 12:52:44 -08:00
fetch-pack.h fetch_pack(): drop unused parameters 2019-03-20 18:34:09 +09:00
fmt-merge-msg.h *.[ch]: remove extern from function declarations using spatch 2019-05-05 15:20:06 +09:00
fsck.c Sync with Git 2.24.1 2019-12-09 22:17:55 -08:00
fsck.h fsck: only provide oid/type in fsck_error callback 2019-10-28 14:05:18 +09:00
fsmonitor.c fsmonitor: handle version 2 of the hooks that will use opaque token 2020-01-13 14:58:43 -08:00
fsmonitor.h mark_fsmonitor_valid(): mark the index as changed if needed 2019-05-28 12:43:43 -07:00
fuzz-commit-graph.c fuzz-commit-graph: initialize repo object 2019-02-07 13:02:26 -08:00
fuzz-pack-headers.c
fuzz-pack-idx.c
generate-cmdlist.sh help -a: do not list commands that are excluded from the build 2019-04-19 14:03:24 +09:00
gettext.c Merge branch 'ab/test-env' 2019-07-25 13:59:20 -07:00
gettext.h *.[ch]: remove extern from function declarations using spatch 2019-05-05 15:20:06 +09:00
git-add--interactive.perl git add -p: use non-zero exit code when the diff generation failed 2019-12-06 08:57:34 -08:00
git-archimport.perl
git-bisect.sh
git-compat-util.h Sync with Git 2.24.1 2019-12-09 22:17:55 -08:00
git-cvsexportcommit.perl cvsexportcommit: force crlf translation 2019-05-07 18:23:27 +09:00
git-cvsimport.perl Fix spelling errors in messages shown to users 2019-11-10 16:00:54 +09:00
git-cvsserver.perl
git-difftool--helper.sh mergetool: use get_merge_tool function 2019-05-13 23:11:59 +09:00
git-filter-branch.sh Recommend git-filter-repo instead of git-filter-branch 2019-09-05 13:01:48 -07:00
git-instaweb.sh git-instaweb: add Python builtin http.server support 2019-01-28 10:57:44 -08:00
git-legacy-stash.sh Merge branch 'js/patch-mode-in-others-in-c' 2020-02-05 14:34:58 -08:00
git-merge-octopus.sh
git-merge-one-file.sh
git-merge-resolve.sh
git-mergetool--lib.sh Merge branch 'dl/difftool-mergetool' 2019-05-19 16:45:30 +09:00
git-mergetool.sh mergetool: use shell variable magic instead of awk 2019-06-12 13:20:56 -07:00
git-p4.py git-p4: avoid leak of file handle when cloning 2020-01-30 12:21:13 -08:00
git-parse-remote.sh
git-quiltimport.sh git-quiltimport: add --keep-non-patch option 2019-01-07 15:29:34 -08:00
git-rebase--preserve-merges.sh rebase: fold git-rebase--common into the -p backend 2019-07-31 12:24:06 -07:00
git-request-pull.sh request-pull: warn if the remote object is not the same as the local one 2019-05-28 13:06:25 -07:00
git-send-email.perl Fix spelling errors in code comments 2019-11-10 16:00:54 +09:00
git-sh-i18n.sh tests: make GIT_TEST_GETTEXT_POISON a boolean 2019-06-21 09:42:49 -07:00
git-sh-setup.sh stash: optionally use the scripted version again 2019-03-07 09:41:40 +09:00
git-submodule.sh Merge branch 'es/recursive-single-branch-clone' 2020-03-05 10:43:03 -08:00
git-svn.perl git svn: stop using rebase --preserve-merges 2019-11-23 09:49:23 +09:00
GIT-VERSION-GEN Git 2.26 2020-03-22 16:50:46 -07:00
git-web--browse.sh
git.c sparse-checkout: create builtin with 'list' subcommand 2019-11-22 16:11:43 +09:00
git.rc mingw: embed a manifest to trick UAC into Doing The Right Thing 2019-06-27 12:55:45 -07:00
gpg-interface.c Merge branch 'hi/gpg-use-check-signature' 2020-03-05 10:43:05 -08:00
gpg-interface.h Merge branch 'hi/gpg-use-check-signature' 2020-03-05 10:43:05 -08:00
graph.c graph: fix collapse of multiple edges 2020-01-15 12:14:51 -08:00
graph.h graph: move doc to graph.h and graph.c 2019-11-18 15:21:28 +09:00
grep.c grep: replace grep_read_mutex by internal obj read lock 2020-01-17 13:52:14 -08:00
grep.h grep: replace grep_read_mutex by internal obj read lock 2020-01-17 13:52:14 -08:00
hash.h hash.h: move object_id definition from cache.h 2019-06-20 10:40:42 -07:00
hashmap.c Fix spelling errors in code comments 2019-11-10 16:00:54 +09:00
hashmap.h Merge branch 'en/doc-typofix' 2019-12-01 09:04:35 -08:00
help.c Fix spelling errors in messages shown to users 2019-11-10 16:00:54 +09:00
help.h help: make help_unknown_ref() NORETURN 2019-08-30 10:22:42 -07:00
hex.c hex: drop sha1_to_hex() 2019-11-13 10:09:10 +09:00
http-backend.c http-backend: allow 64-character hex names 2019-04-01 11:57:38 +09:00
http-fetch.c
http-push.c http-push: simplify deleting a list item 2019-10-15 10:53:50 +09:00
http-walker.c Merge branch 'bc/hash-transition-16' 2019-04-25 16:41:17 +09:00
http.c strbuf: add and use strbuf_insertstr() 2020-02-10 09:04:45 -08:00
http.h http: use xmalloc with cURL 2019-08-15 12:37:10 -07:00
ident.c Merge branch 'ps/stash-in-c' 2019-04-22 11:14:43 +09:00
imap-send.c Merge branch 'nd/imap-send-typofix' 2019-02-12 09:00:25 -08:00
INSTALL Merge branch 'ar/install-doc-update-cmds-needing-the-shell' 2019-12-01 09:04:41 -08:00
interdiff.c
interdiff.h
iterator.h
json-writer.c
json-writer.h
khash.h hashmap: convert sha1hash() to oidhash() 2019-06-20 10:44:22 -07:00
kwset.c Merge branch 'rs/copy-array' into maint 2019-07-29 12:38:15 -07:00
kwset.h kset.h, tar.h: add missing header guard to prevent multiple inclusion 2019-11-07 20:12:04 +09:00
levenshtein.c
levenshtein.h
LGPL-2.1
line-log.c Merge branch 'sg/line-log-tree-diff-optim' 2019-09-18 11:50:09 -07:00
line-log.h *.[ch]: remove extern from function declarations using spatch 2019-05-05 15:20:06 +09:00
line-range.c
line-range.h
linear-assignment.c
linear-assignment.h
list-objects-filter-options.c Merge branch 'jk/partial-clone-sparse-blob' 2019-10-07 11:32:54 +09:00
list-objects-filter-options.h Merge branch 'jk/partial-clone-sparse-blob' 2019-10-07 11:32:54 +09:00
list-objects-filter.c Merge branch 'jk/partial-clone-sparse-blob' 2019-10-07 11:32:54 +09:00
list-objects-filter.h list-objects-filter: implement composite filters 2019-06-28 08:41:53 -07:00
list-objects.c Merge branch 'jk/list-objects-optim-wo-trees' 2019-10-07 11:32:56 +09:00
list-objects.h list-objects: consume sparse tree walk 2019-01-17 13:44:39 -08:00
list.h
ll-merge.c am: reload .gitattributes after patching it 2019-09-03 15:16:18 -07:00
ll-merge.h merge: move doc to ll-merge.h 2019-11-18 15:21:28 +09:00
lockfile.c
lockfile.h *.[ch]: manually align parameter lists 2019-05-05 15:20:10 +09:00
log-tree.c Merge branch 'hd/show-one-mergetag-fix' into maint 2020-03-17 15:02:24 -07:00
log-tree.h
ls-refs.c upload-pack: strip namespace from symref data 2019-05-28 10:02:00 -07:00
ls-refs.h *.[ch]: manually align parameter lists 2019-05-05 15:20:10 +09:00
mailinfo.c Merge branch 'rs/micro-cleanups' 2020-03-02 15:07:20 -08:00
mailinfo.h *.[ch]: remove extern from function declarations using spatch 2019-05-05 15:20:06 +09:00
mailmap.c
mailmap.h
Makefile Merge branch 'bw/remote-rename-update-config' 2020-02-25 11:18:32 -08:00
match-trees.c match-trees.c: remove the_repo from shift_tree*() 2019-06-27 12:45:17 -07:00
mem-pool.c
mem-pool.h
merge-blobs.c
merge-blobs.h *.[ch]: manually align parameter lists 2019-05-05 15:20:10 +09:00
merge-recursive.c Merge branch 'en/t3433-rebase-stat-dirty-failure' into maint 2020-03-17 15:02:23 -07:00
merge-recursive.h hashmap_entry: remove first member requirement from docs 2019-10-07 10:20:12 +09:00
merge.c read-cache.c: kill read_index() 2019-01-14 12:13:04 -08:00
mergesort.c
mergesort.h
midx.c nth_packed_object_oid(): use customary integer return 2020-02-24 12:55:42 -08:00
midx.h midx: add MIDX_PROGRESS flag 2019-10-23 12:05:05 +09:00
name-hash.c Merge branch 'en/doc-typofix' 2019-12-01 09:04:35 -08:00
notes-cache.c
notes-cache.h
notes-merge.c notes-merge: switch to use the_hash_algo 2019-04-01 11:57:37 +09:00
notes-merge.h
notes-utils.c strbuf: add and use strbuf_insertstr() 2020-02-10 09:04:45 -08:00
notes-utils.h notes-utils.c: remove the_repository references 2019-01-14 12:13:04 -08:00
notes.c Merge branch 'jh/notes-fanout-fix' into maint 2020-03-17 15:02:22 -07:00
notes.h Merge branch 'dl/format-patch-notes-config-fixup' 2019-12-25 11:21:58 -08:00
object-store.h packed_object_info(): use object_id for returning delta base 2020-02-24 12:55:53 -08:00
object.c Merge branch 'jk/object-filter-with-bitmap' 2020-03-02 15:07:18 -08:00
object.h pack-bitmap: fix leak of haves/wants object lists 2020-02-13 09:08:58 -08:00
oidmap.c hashmap: introduce hashmap_free_entries 2019-10-07 10:20:11 +09:00
oidmap.h hashmap: use *_entry APIs for iteration 2019-10-07 10:20:11 +09:00
oidset.c Merge branch 'br/blame-ignore' 2019-07-19 11:30:20 -07:00
oidset.h Merge branch 'br/blame-ignore' 2019-07-19 11:30:20 -07:00
pack-bitmap-write.c pack-objects: drop packlist index_pos optimization 2019-09-06 11:03:42 -07:00
pack-bitmap.c Merge branch 'jk/nth-packed-object-id' 2020-03-05 10:43:03 -08:00
pack-bitmap.h Merge branch 'jk/object-filter-with-bitmap' 2020-03-02 15:07:18 -08:00
pack-check.c pack-check: push oid lookup into loop 2020-02-24 12:55:53 -08:00
pack-objects.c pack-objects: convert oe_set_delta_ext() to use object_id 2020-02-24 12:55:52 -08:00
pack-objects.h pack-objects: convert oe_set_delta_ext() to use object_id 2020-02-24 12:55:52 -08:00
pack-revindex.c pack-revindex: open index if necessary 2019-04-16 16:58:21 +09:00
pack-revindex.h pack-revindex: open index if necessary 2019-04-16 16:58:21 +09:00
pack-write.c pack-write: use hash_to_hex when writing checksums 2019-08-19 15:04:58 -07:00
pack.h *.[ch]: manually align parameter lists 2019-05-05 15:20:10 +09:00
packfile.c packfile: drop nth_packed_object_sha1() 2020-02-24 12:55:53 -08:00
packfile.h packfile: drop nth_packed_object_sha1() 2020-02-24 12:55:53 -08:00
pager.c pager: add a helper function to clear the last line in the terminal 2019-06-24 13:38:46 -07:00
parse-options-cb.c parse-options: simplify parse_options_dup() 2020-02-10 09:45:49 -08:00
parse-options.c Merge branch 'pb/am-show-current-patch' 2020-03-09 11:21:19 -07:00
parse-options.h Merge branch 'pb/am-show-current-patch' 2020-03-09 11:21:19 -07:00
patch-delta.c
patch-ids.c hashmap: remove type arg from hashmap_{get,put,remove}_entry 2019-10-07 10:20:12 +09:00
patch-ids.h format-patch: make --base patch-id output stable 2019-05-08 19:27:43 +09:00
path.c normalize_path_copy(): document "dst" size expectations 2020-01-30 13:45:58 -08:00
path.h path: add a function to check for path suffix 2019-08-26 10:36:13 -07:00
pathspec.c prefix_path: show gitdir if worktree unavailable 2020-03-15 09:35:46 -07:00
pathspec.h Merge branch 'hw/doc-in-header' 2019-12-16 13:08:39 -08:00
pkt-line.c pkt-line: drop 'const'-ness of a param to set_packet_header() 2019-05-16 13:29:06 +09:00
pkt-line.h pkt-line: fix a typo 2019-12-02 08:48:56 -08:00
preload-index.c mark_fsmonitor_valid(): mark the index as changed if needed 2019-05-28 12:43:43 -07:00
pretty.c Merge branch 'rs/strbuf-insertstr' 2020-02-17 13:22:17 -08:00
pretty.h Merge branch 'sb/more-repo-in-api' 2019-02-05 14:26:09 -08:00
prio-queue.c
prio-queue.h *.[ch]: remove extern from function declarations using spatch 2019-05-05 15:20:06 +09:00
progress.c progress: create GIT_PROGRESS_DELAY 2019-11-27 10:57:10 +09:00
progress.h Merge branch 'sg/overlong-progress-fix' 2019-04-25 16:41:19 +09:00
promisor-remote.c promisor-remote: remove fetch_if_missing=0 2019-11-13 11:50:58 +09:00
promisor-remote.h Merge branch 'dl/honor-cflags-in-hdr-check' 2019-10-07 11:33:02 +09:00
prompt.c
prompt.h
protocol.c fetch: default to protocol version 2 2020-01-15 14:03:55 -08:00
protocol.h *.[ch]: remove extern from function declarations using spatch 2019-05-05 15:20:06 +09:00
quote.c quote: use isalnum() to check for alphanumeric characters 2020-02-24 09:30:29 -08:00
quote.h quote: add sq_append_quote_argv_pretty() 2019-08-09 10:48:02 -07:00
range-diff.c range-diff: mark pointers as const 2019-12-06 12:34:49 -08:00
range-diff.h Merge branch 'dl/range-diff-with-notes' 2019-12-16 13:08:46 -08:00
reachable.c pack-bitmap: basic noop bitmap filter infrastructure 2020-02-14 10:46:22 -08:00
reachable.h *.[ch]: manually align parameter lists 2019-05-05 15:20:10 +09:00
read-cache.c Merge branch 'js/mingw-loosen-overstrict-tree-entry-checks' 2020-01-10 14:45:27 -08:00
README.md doc: recommend lore.kernel.org over public-inbox.org 2019-11-30 09:12:04 -08:00
rebase-interactive.c Merge branch 'rt/format-zero-length-fix' 2020-03-09 11:21:21 -07:00
rebase-interactive.h Merge branch 'en/rebase-backend' 2020-03-02 15:07:19 -08:00
rebase.c pull --rebase/remote rename: document and honor single-letter abbreviations rebase types 2020-02-10 10:52:10 -08:00
rebase.h pull --rebase/remote rename: document and honor single-letter abbreviations rebase types 2020-02-10 10:52:10 -08:00
ref-filter.c Merge branch 'dr/push-remote-ref-update' 2020-03-11 10:58:16 -07:00
ref-filter.h parse_opt_ref_sorting: always use with NONEG flag 2019-03-21 12:03:35 +09:00
reflog-walk.c
reflog-walk.h *.[ch]: manually align parameter lists 2019-05-05 15:20:10 +09:00
refs.c hashmap_entry: remove first member requirement from docs 2019-10-07 10:20:12 +09:00
refs.h refs: move doc to refs.h 2019-11-18 15:21:28 +09:00
refspec.c refspec: make hash size independent 2019-04-01 11:57:39 +09:00
refspec.h remote: move doc to remote.h and refspec.h 2019-11-18 15:21:28 +09:00
RelNotes Git 2.25.2 2020-03-17 15:06:37 -07:00
remote-curl.c Merge branch 'rs/show-progress-in-dumb-http-fetch' 2020-03-09 11:21:21 -07:00
remote-testsvn.c
remote.c remote: drop "explicit" parameter from remote_ref_for_branch() 2020-03-03 14:56:05 -08:00
remote.h remote: drop "explicit" parameter from remote_ref_for_branch() 2020-03-03 14:56:05 -08:00
replace-object.c replace-object: make replace operations thread-safe 2020-01-17 13:52:14 -08:00
replace-object.h replace-object: make replace operations thread-safe 2020-01-17 13:52:14 -08:00
repo-settings.c Merge branch 'ds/feature-macros' 2019-10-24 13:34:03 +09:00
repository.c Fix spelling errors in code comments 2019-11-10 16:00:54 +09:00
repository.h Fix spelling errors in code comments 2019-11-10 16:00:54 +09:00
rerere.c Fix spelling errors in code comments 2019-11-10 16:00:54 +09:00
rerere.h
resolve-undo.c
resolve-undo.h *.[ch]: remove extern from function declarations using spatch 2019-05-05 15:20:06 +09:00
revision.c Merge branch 'dl/format-patch-notes-config-fixup' 2019-12-25 11:21:58 -08:00
revision.h Merge branch 'dl/format-patch-notes-config-fixup' 2019-12-25 11:21:58 -08:00
run-command.c Merge branch 'bc/run-command-nullness-after-free-fix' into maint 2020-02-14 12:42:27 -08:00
run-command.h run-command.h: fix mis-indented struct member 2020-02-22 09:05:34 -08:00
send-pack.c Merge branch 'jk/send-pack-check-negative-with-quick' 2019-12-06 15:09:22 -08:00
send-pack.h
sequencer.c Merge branch 'js/rebase-i-with-colliding-hash' into maint 2020-03-17 15:02:21 -07:00
sequencer.h Merge branch 'en/rebase-backend' 2020-03-02 15:07:19 -08:00
serve.c
serve.h *.[ch]: manually align parameter lists 2019-05-05 15:20:10 +09:00
server-info.c Fix spelling errors in code comments 2019-11-10 16:00:54 +09:00
setup.c Merge branch 'es/outside-repo-errmsg-hints' 2020-03-16 12:43:29 -07:00
sh-i18n--envsubst.c cleanup: fix possible overflow errors in binary search, part 2 2019-06-13 11:28:53 -07:00
sha1-array.c sha1-array: move doc to sha1-array.h 2019-11-18 15:21:28 +09:00
sha1-array.h sha1-array: move doc to sha1-array.h 2019-11-18 15:21:28 +09:00
sha1-file.c packed_object_info(): use object_id for returning delta base 2020-02-24 12:55:53 -08:00
sha1-lookup.c Merge branch 'js/azure-pipelines-msvc' 2019-10-15 13:48:00 +09:00
sha1-lookup.h *.[ch]: manually align parameter lists 2019-05-05 15:20:10 +09:00
sha1-name.c nth_packed_object_oid(): use customary integer return 2020-02-24 12:55:42 -08:00
sha1dc_git.c hex: drop sha1_to_hex() 2019-11-13 10:09:10 +09:00
sha1dc_git.h
shallow.c Merge branch 'rs/dedup-includes' 2019-10-11 14:24:48 +09:00
shell.c shell: use skip_prefix() instead of starts_with() 2019-11-27 11:18:24 +09:00
shortlog.h
sideband.c Merge branch 'jt/fetch-v2-sideband' 2019-02-05 14:26:11 -08:00
sideband.h {fetch,upload}-pack: sideband v2 fetch response 2019-01-17 11:25:07 -08:00
sigchain.c
sigchain.h sigchain: move doc to sigchain.h 2019-11-18 15:21:29 +09:00
split-index.c Merge branch 'nd/split-index-null-base-fix' 2019-03-07 09:59:56 +09:00
split-index.h
stable-qsort.c Move git_sort(), a stable sort, into into libgit.a 2019-10-02 14:44:51 +09:00
strbuf.c credential: allow wildcard patterns when matching config 2020-02-20 13:05:43 -08:00
strbuf.h Merge branch 'bc/wildcard-credential' 2020-03-05 10:43:02 -08:00
streaming.c streaming: allow open_istream() to handle any repo 2020-01-31 10:45:39 -08:00
streaming.h streaming: allow open_istream() to handle any repo 2020-01-31 10:45:39 -08:00
string-list.c
string-list.h Merge branch 'en/string-list-can-be-custom-sorted' into maint 2020-02-14 12:42:27 -08:00
sub-process.c hashmap: remove type arg from hashmap_{get,put,remove}_entry 2019-10-07 10:20:12 +09:00
sub-process.h hashmap_entry: remove first member requirement from docs 2019-10-07 10:20:12 +09:00
submodule-config.c Merge branch 'mr/show-config-scope' 2020-02-17 13:22:17 -08:00
submodule-config.h submodule-config: add skip_if_read option to repo_read_gitmodules() 2020-01-17 13:52:14 -08:00
submodule.c Merge branch 'dt/submodule-rm-with-stale-cache' into maint 2020-03-17 15:02:21 -07:00
submodule.h Sync with 2.22.2 2019-12-06 16:31:30 +01:00
symlinks.c
tag.c commit, tag: don't set parsed bit for parse failures 2019-10-28 14:04:49 +09:00
tag.h tag: factor out get_tagged_oid() 2019-09-05 14:10:18 -07:00
tar.h kset.h, tar.h: add missing header guard to prevent multiple inclusion 2019-11-07 20:12:04 +09:00
tempfile.c
tempfile.h *.[ch]: manually align parameter lists 2019-05-05 15:20:10 +09:00
thread-utils.c
thread-utils.h
tmp-objdir.c
tmp-objdir.h
trace2.c Merge branch 'jh/trace2' 2019-05-13 23:50:35 +09:00
trace2.h trace2: move doc to trace2.h 2019-11-18 15:21:29 +09:00
trace.c packfile: drop release_pack_memory() 2019-08-13 12:21:33 -07:00
trace.h trace: move doc to trace.h 2019-11-18 15:21:29 +09:00
trailer.c pretty: add support for separator option in %(trailers) 2019-01-29 10:03:32 -08:00
trailer.h pretty: add support for separator option in %(trailers) 2019-01-29 10:03:32 -08:00
transport-helper.c C: use skip_prefix() to avoid hardcoded string length 2020-01-31 13:03:45 -08:00
transport-internal.h transport: teach all vtables to allow fetch first 2019-08-22 14:20:39 -07:00
transport.c Merge branch 'jk/no-flush-upon-disconnecting-slrpc-transport' into maint 2020-02-14 12:42:28 -08:00
transport.h remote-curl: pass on atomic capability to remote side 2019-10-17 16:08:22 +09:00
tree-diff.c tree-walk.c: remove the_repo from fill_tree_descriptor() 2019-06-27 12:45:17 -07:00
tree-walk.c tree-walk.c: break circular dependency with unpack-trees 2020-02-04 10:32:15 -08:00
tree-walk.h tree-walk.c: break circular dependency with unpack-trees 2020-02-04 10:32:15 -08:00
tree.c tree: simplify parse_tree_indirect() 2019-09-03 15:10:53 -07:00
tree.h
unicode-width.h unicode: update the width tables to Unicode 13.0 2020-03-17 15:06:37 -07:00
unimplemented.sh
unix-socket.c
unix-socket.h
unpack-trees.c Merge branch 'en/simplify-check-updates-in-unpack-trees' into maint 2020-03-17 15:02:25 -07:00
unpack-trees.h tree-walk.c: break circular dependency with unpack-trees 2020-02-04 10:32:15 -08:00
upload-pack.c config: split repo scope to local and worktree 2020-02-10 10:32:20 -08:00
upload-pack.h *.[ch]: manually align parameter lists 2019-05-05 15:20:10 +09:00
url.c Fix spelling errors in code comments 2019-11-10 16:00:54 +09:00
url.h list-objects-filter: implement composite filters 2019-06-28 08:41:53 -07:00
urlmatch.c credential: allow wildcard patterns when matching config 2020-02-20 13:05:43 -08:00
urlmatch.h credential: allow wildcard patterns when matching config 2020-02-20 13:05:43 -08:00
usage.c vreportf(): avoid relying on stdio buffering 2019-11-02 15:20:21 +09:00
userdiff.c Merge branch 'ln/userdiff-elixir' 2019-12-25 11:21:59 -08:00
userdiff.h
utf8.c utf8: use skip_iprefix() in same_utf_encoding() 2019-11-10 16:04:36 +09:00
utf8.h *.[ch]: remove extern from function declarations using spatch 2019-05-05 15:20:06 +09:00
varint.c
varint.h *.[ch]: remove extern from function declarations using spatch 2019-05-05 15:20:06 +09:00
version.c
version.h
versioncmp.c
walker.c Merge branch 'rs/show-progress-in-dumb-http-fetch' 2020-03-09 11:21:21 -07:00
walker.h remote-curl: show progress for fetches over dumb HTTP 2020-03-03 13:15:40 -08:00
wildmatch.c
wildmatch.h
worktree.c Merge branch 'hv/receive-denycurrent-everywhere' 2020-03-05 10:43:03 -08:00
worktree.h worktree: add utility to find worktree by pathname 2020-02-24 13:04:30 -08:00
wrap-for-bin.sh
wrapper.c Merge branch 'ah/cleanups' 2019-10-09 14:01:00 +09:00
write-or-die.c
ws.c
wt-status.c Merge branch 'bc/object-id-part17' 2019-10-11 14:24:46 +09:00
wt-status.h wt-status: convert struct wt_status to object_id 2019-08-19 15:04:59 -07:00
xdiff-interface.c xdiff: avoid computing non-zero offset from NULL pointer 2020-01-28 23:13:25 -08:00
xdiff-interface.h Fix spelling errors in code comments 2019-11-10 16:00:54 +09:00
zlib.c

README.md

Build Status

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.txt to get started, then see Documentation/giteveryday.txt for a useful minimum set of commands, and Documentation/git-<commandname>.txt 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.txt (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). To subscribe to the list, send an email with just "subscribe git" in the body to majordomo@vger.kernel.org. The mailing list archives are available at https://lore.kernel.org/git/, http://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