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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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Patrick Steinhardt bcec6780b2 receive-pack: only use visible refs for connectivity check 
When serving a push, git-receive-pack(1) needs to verify that the
packfile sent by the client contains all objects that are required by
the updated references. This connectivity check works by marking all
preexisting references as uninteresting and using the new reference tips
as starting point for a graph walk.

Marking all preexisting references as uninteresting can be a problem
when it comes to performance. Git forges tend to do internal bookkeeping
to keep alive sets of objects for internal use or make them easy to find
via certain references. These references are typically hidden away from
the user so that they are neither advertised nor writeable. At GitLab,
we have one particular repository that contains a total of 7 million
references, of which 6.8 million are indeed internal references. With
the current connectivity check we are forced to load all these
references in order to mark them as uninteresting, and this alone takes
around 15 seconds to compute.

We can optimize this by only taking into account the set of visible refs
when marking objects as uninteresting. This means that we may now walk
more objects until we hit any object that is marked as uninteresting.
But it is rather unlikely that clients send objects that make large
parts of objects reachable that have previously only ever been hidden,
whereas the common case is to push incremental changes that build on top
of the visible object graph.

This provides a huge boost to performance in the mentioned repository,
where the vast majority of its refs hidden. Pushing a new commit into
this repo with `transfer.hideRefs` set up to hide 6.8 million of 7 refs
as it is configured in Gitaly leads to a 4.5-fold speedup:

    Benchmark 1: main
      Time (mean ± σ):     30.977 s ±  0.157 s    [User: 30.226 s, System: 1.083 s]
      Range (min … max):   30.796 s … 31.071 s    3 runs

    Benchmark 2: pks-connectivity-check-hide-refs
      Time (mean ± σ):      6.799 s ±  0.063 s    [User: 6.803 s, System: 0.354 s]
      Range (min … max):    6.729 s …  6.850 s    3 runs

    Summary
      'pks-connectivity-check-hide-refs' ran
        4.56 ± 0.05 times faster than 'main'

As we mostly go through the same codepaths even in the case where there
are no hidden refs at all compared to the code before there is no change
in performance when no refs are hidden:

    Benchmark 1: main
      Time (mean ± σ):     48.188 s ±  0.432 s    [User: 49.326 s, System: 5.009 s]
      Range (min … max):   47.706 s … 48.539 s    3 runs

    Benchmark 2: pks-connectivity-check-hide-refs
      Time (mean ± σ):     48.027 s ±  0.500 s    [User: 48.934 s, System: 5.025 s]
      Range (min … max):   47.504 s … 48.500 s    3 runs

    Summary
      'pks-connectivity-check-hide-refs' ran
        1.00 ± 0.01 times faster than 'main'

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Taylor Blau <me@ttaylorr.com>
2022-11-17 16:22:52 -05:00
.github ci: add address and undefined sanitizer tasks 2022-10-20 09:20:59 -07:00
block-sha1 Makefile + hash.h: remove PPC_SHA1 implementation 2022-08-31 14:37:31 -07:00
builtin receive-pack: only use visible refs for connectivity check 2022-11-17 16:22:52 -05:00
ci Merge branch 'jc/more-sanitizer-at-ci' 2022-10-25 17:11:44 -07:00
compat Merge branch 'jk/unused-anno-more' 2022-10-27 14:51:52 -07:00
contrib Merge branch 'js/cmake-updates' 2022-10-27 14:51:53 -07:00
Documentation rev-parse: add --exclude-hidden= option 2022-11-17 16:22:52 -05:00
ewah Merge branch 'ep/maint-equals-null-cocci' 2022-05-20 15:26:59 -07:00
git-gui
gitk-git Merge branch 'master' of git://git.ozlabs.org/~paulus/gitk 2022-05-11 08:25:02 -07:00
gitweb Merge branch 'jr/gitweb-title-shortening' 2022-08-05 15:52:14 -07:00
mergetools mergetools: vimdiff: simplify tabfirst 2022-08-10 12:39:39 -07:00
negotiator git-compat-util.h: use "UNUSED", not "UNUSED(var)" 2022-09-01 10:49:48 -07:00
oss-fuzz Merge branch 'ac/fuzzers' 2022-10-07 17:19:59 -07:00
perl perl Git.pm: don't ignore signalled failure in _cmd_close() 2022-02-01 15:21:19 -08:00
po l10n: zh_TW.po: Git 2.38.0, round 3 2022-10-01 19:10:41 +08:00
refs refs: unify parse_worktree_ref() and ref_type() 2022-09-19 11:11:11 -07:00
reftable reftable: use a pointer for pq_entry param 2022-09-15 11:32:37 -07:00
sha1collisiondetection@855827c583
sha1dc
sha256 sha256: add support for Nettle 2022-07-10 14:43:34 -07:00
t rev-parse: add --exclude-hidden= option 2022-11-17 16:22:52 -05:00
templates fsmonitor: query watchman with right valid json 2022-06-07 10:00:49 -07:00
trace2 tr2: shows scope unconditionally in addition to key-value pair 2022-08-11 21:05:00 -07:00
xdiff xdiff: drop unused mmfile parameters from xdl_do_patience_diff() 2022-08-20 14:14:55 -07:00
.cirrus.yml ci: update Cirrus-CI image to FreeBSD 12.3 2022-05-25 08:47:11 -07:00
.clang-format
.editorconfig
.gitattributes
.gitignore Merge branch 'js/cmake-updates' 2022-10-27 14:51:53 -07:00
.gitmodules
.mailmap mailmap: change primary address for Derrick Stolee 2022-02-14 13:27:31 -08:00
.tsan-suppressions
abspath.c
aclocal.m4
add-interactive.c git-compat-util.h: use "UNUSED", not "UNUSED(var)" 2022-09-01 10:49:48 -07:00
add-interactive.h
add-patch.c add -p: avoid ambiguous signed/unsigned comparison 2022-10-19 11:55:28 -07:00
advice.c advice.h: add advise_on_moving_dirty_path() 2022-08-10 13:57:50 -07:00
advice.h advice.h: add advise_on_moving_dirty_path() 2022-08-10 13:57:50 -07:00
alias.c alias.c: reject too-long cmdline strings in split_cmdline() 2022-10-01 00:23:38 -04:00
alias.h
alloc.c alloc.[ch]: remove alloc_report() function 2022-04-01 10:16:11 -07:00
alloc.h alloc.[ch]: remove alloc_report() function 2022-04-01 10:16:11 -07:00
apply.c apply: mark unused parameters in noop error/warning routine 2022-10-17 21:24:04 -07:00
apply.h range-diff: plug memory leak in common invocation 2022-03-04 13:24:19 -08:00
archive-tar.c git-compat-util.h: use "UNUSED", not "UNUSED(var)" 2022-09-01 10:49:48 -07:00
archive-zip.c git-compat-util.h: use "UNUSED", not "UNUSED(var)" 2022-09-01 10:49:48 -07:00
archive.c Merge branch 'rs/archive-dedup-printf' into maint-2.38 2022-10-27 15:24:14 -07:00
archive.h archive: rename archiver data field to filter_command 2022-06-15 13:19:46 -07:00
attr.c attr: drop DEBUG_ATTR code 2022-10-06 09:59:17 -07:00
attr.h attr.h: remove duplicate struct definition 2022-03-14 05:41:08 +00:00
banned.h C99: remove hardcoded-out !HAVE_VARIADIC_MACROS code 2022-02-21 19:14:19 -08:00
base85.c
bisect.c git-compat-util.h: use "UNUSED", not "UNUSED(var)" 2022-09-01 10:49:48 -07:00
bisect.h bisect: output state before we are ready to compute bisection 2022-05-11 12:35:11 -07:00
blame.c Merge branch 'rs/mergesort' 2022-08-03 13:36:09 -07:00
blame.h
blob.c
blob.h
bloom.c git-compat-util.h: use "UNUSED", not "UNUSED(var)" 2022-09-01 10:49:48 -07:00
bloom.h
branch.c branch: consider refs under 'update-refs' 2022-07-19 12:49:03 -07:00
branch.h Merge branch 'ds/branch-checked-out' into ds/rebase-update-ref 2022-07-12 08:38:42 -07:00
builtin.h builtin/diagnose.c: create 'git diagnose' builtin 2022-08-12 13:20:02 -07:00
bulk-checkin.c t5351: avoid relying on core.fsyncMethod = batch to be supported 2022-07-29 09:08:57 -07:00
bulk-checkin.h core.fsyncmethod: batched disk flushes for loose-objects 2022-04-06 13:13:01 -07:00
bundle-uri.c bundle-uri: add support for http(s):// and file:// 2022-08-10 14:07:37 -07:00
bundle-uri.h bundle-uri: create basic file-copy logic 2022-08-10 14:07:37 -07:00
bundle.c Merge branch 'ab/plug-leak-in-revisions' 2022-06-07 14:10:56 -07:00
bundle.h list-objects-filter: add and use initializers 2022-09-12 08:38:59 -07:00
cache-tree.c verify_one_sparse(): drop unused parameters 2022-08-20 14:14:17 -07:00
cache-tree.h cache-tree: remove cache_tree_find_path() 2022-06-16 11:59:56 -07:00
cache.h Merge branch 'ds/decorate-filter-tweak' 2022-08-29 14:55:11 -07:00
cbtree.c cbtree: remove broken and unused cb_unlink 2021-12-07 15:18:35 -08:00
cbtree.h cbtree: remove broken and unused cb_unlink 2021-12-07 15:18:35 -08:00
chdir-notify.c
chdir-notify.h
check-builtins.sh
checkout.c *.[ch] *_INIT macros: use { 0 } for a "zero out" idiom 2021-09-27 14:47:59 -07:00
checkout.h
chunk-format.c chunk-format.h: extract oid_version() 2022-05-26 15:48:26 -07:00
chunk-format.h chunk-format.h: extract oid_version() 2022-05-26 15:48:26 -07:00
CODE_OF_CONDUCT.md CODE_OF_CONDUCT.md: update PLC members list 2022-02-18 12:36:29 -08:00
color.c git-compat-util.h: use "UNUSED", not "UNUSED(var)" 2022-09-01 10:49:48 -07:00
color.h color: allow colors to be prefixed with "reset" 2021-10-28 09:37:18 -07:00
column.c
column.h *.[ch]: manually align parameter lists 2019-05-05 15:20:10 +09:00
combine-diff.c Merge branch 'rs/combine-diff-with-incompatible-options' into maint 2022-07-27 13:00:32 -07:00
command-list.txt version: fix builtin linking & documentation 2022-09-19 17:28:25 -07:00
commit-graph.c Merge branch 'ml/commit-graph-expire-dir-leak-fix' 2022-09-21 14:23:14 -07:00
commit-graph.h Merge branch 'tb/commit-graph-genv2-upgrade-fix' 2022-08-03 13:36:08 -07:00
commit-reach.c
commit-reach.h
commit-slab-decl.h
commit-slab-impl.h
commit-slab.h
commit.c git-compat-util.h: use "UNUSED", not "UNUSED(var)" 2022-09-01 10:49:48 -07:00
commit.h shallow: reset commit grafts when shallow is reset 2022-03-17 17:44:38 -07:00
common-main.c grep: fix multibyte regex handling under macOS 2022-08-26 11:45:52 -07:00
config.c Merge branch 'gc/bare-repo-discovery' 2022-10-25 17:11:44 -07:00
config.h config: learn git_protected_config() 2022-07-14 15:08:29 -07:00
config.mak.dev config.mak.dev: disable suggest braces error on old clang versions 2022-10-10 11:15:31 -07:00
config.mak.in
config.mak.uname mingw: remove unneeded NO_CURL directive 2022-07-29 09:48:17 -07:00
configure.ac Makefile + hash.h: remove PPC_SHA1 implementation 2022-08-31 14:37:31 -07:00
connect.c Merge branch 'ab/env-array' 2022-06-10 15:04:13 -07:00
connect.h
connected.c receive-pack: only use visible refs for connectivity check 2022-11-17 16:22:52 -05:00
connected.h receive-pack: only use visible refs for connectivity check 2022-11-17 16:22:52 -05:00
convert.c convert: mark unused parameter in null stream filter 2022-10-17 21:24:04 -07:00
convert.h checkout: fix two bugs on the final count of updated entries 2022-07-14 10:19:28 -07:00
copy.c
COPYING
credential.c urlmatch.c: add and use a *_release() function 2022-03-04 13:24:18 -08:00
credential.h
csum-file.c core.fsync: introduce granular fsync control infrastructure 2022-03-10 15:10:22 -08:00
csum-file.h core.fsync: introduce granular fsync control infrastructure 2022-03-10 15:10:22 -08:00
ctype.c
daemon.c daemon: clarify directory arguments 2022-07-19 12:45:31 -07:00
date.c date: mark unused parameters in handler functions 2022-10-17 21:24:04 -07:00
date.h date API: add and use a date_mode_release() 2022-02-16 09:40:00 -08:00
decorate.c
decorate.h
delta-islands.c git-compat-util.h: use "UNUSED", not "UNUSED(var)" 2022-09-01 10:49:48 -07:00
delta-islands.h
delta.h odb: guard against data loss checking out a huge file 2021-11-03 11:22:27 -07:00
detect-compiler detect-compiler: make detection independent of locale 2022-05-09 08:52:26 -07:00
diagnose.c diagnose.c: refactor to safely use 'd_type' 2022-09-19 10:25:01 -07:00
diagnose.h builtin/diagnose.c: add '--mode' option 2022-08-12 13:20:02 -07:00
diff-delta.c
diff-lib.c oneway_diff: handle removed sparse directories 2022-08-08 13:21:49 -07:00
diff-merges.c diff-merges: cleanup set_diff_merges() 2022-09-16 09:21:43 -07:00
diff-merges.h
diff-no-index.c diff-no-index: simplify argv index calculation 2022-09-07 12:36:43 -07:00
diff.c diffstat_consume(): assert non-zero length 2022-10-17 21:24:03 -07:00
diff.h Merge branch 'js/diff-filter-negation-fix' 2022-02-16 15:14:30 -08:00
diffcore-break.c
diffcore-delta.c diffcore-delta.c: LLP64 compatibility, upcast unity for left shift 2021-12-01 14:48:10 -08:00
diffcore-order.c
diffcore-pickaxe.c diffcore-pickaxe: mark unused parameters in pickaxe functions 2022-10-17 21:24:04 -07:00
diffcore-rename.c object-file API: have hash_object_file() take "enum object_type" 2022-02-25 17:16:32 -08:00
diffcore-rotate.c
diffcore.h
dir-iterator.c
dir-iterator.h dir-iterator: add flags parameter to dir_iterator_begin 2019-07-11 13:52:15 -07:00
dir.c Merge branch 'rs/use-fspathncmp' into maint-2.38 2022-10-27 15:24:13 -07:00
dir.h match_pathname(): drop unused "flags" parameter 2022-08-19 12:20:56 -07:00
editor.c run-command API: rename "env_array" to "env" 2022-06-02 14:31:16 -07:00
entry.c checkout: fix two bugs on the final count of updated entries 2022-07-14 10:19:28 -07:00
entry.h checkout: fix two bugs on the final count of updated entries 2022-07-14 10:19:28 -07:00
environment.c Merge branch 'ab/unused-annotation' 2022-09-14 12:56:39 -07:00
environment.h
exec-cmd.c mark unused parameters in trivial compat functions 2022-10-17 21:24:03 -07:00
exec-cmd.h
fetch-negotiator.c fetch-negotiator: add specific noop initializer 2022-03-28 10:25:52 -07:00
fetch-negotiator.h fetch-negotiator: add specific noop initializer 2022-03-28 10:25:52 -07:00
fetch-pack.c Merge branch 'ab/unused-annotation' 2022-09-14 12:56:39 -07:00
fetch-pack.h fetch-pack: add refetch 2022-03-28 10:25:52 -07:00
fmt-merge-msg.c revisions API users: add straightforward release_revisions() 2022-04-13 23:56:08 -07:00
fmt-merge-msg.h merge: allow to pretend a merge is made into a different branch 2021-12-20 14:55:02 -08:00
fsck.c fsck: actually detect bad file modes in trees 2022-08-10 14:26:27 -07:00
fsck.h fsck: downgrade tree badFilemode to "info" 2022-08-10 14:26:29 -07:00
fsmonitor--daemon.h fsmonitor: deal with synthetic firmlinks on macOS 2022-10-05 11:05:23 -07:00
fsmonitor-ipc.c fsmonitor: relocate socket file if .git directory is remote 2022-10-05 11:05:22 -07:00
fsmonitor-ipc.h fsmonitor: relocate socket file if .git directory is remote 2022-10-05 11:05:22 -07:00
fsmonitor-path-utils.h fsmonitor: deal with synthetic firmlinks on macOS 2022-10-05 11:05:23 -07:00
fsmonitor-settings.c fsmonitor: check for compatability before communicating with fsmonitor 2022-10-05 11:05:23 -07:00
fsmonitor-settings.h fsmonitor: check for compatability before communicating with fsmonitor 2022-10-05 11:05:23 -07:00
fsmonitor.c fsmonitor: fix leak of warning message 2022-10-10 22:16:56 -07:00
fsmonitor.h fsmonitor: never set CE_FSMONITOR_VALID on submodules 2022-05-26 15:59:27 -07:00
generate-cmdlist.sh generate-cmdlist.sh: don't parse command-list.txt thrice 2021-11-05 12:01:13 -07:00
generate-configlist.sh
generate-hooklist.sh hook-list.h: add a generated list of hooks, like config-list.h 2021-09-27 09:44:54 -07:00
gettext.c grep: fix multibyte regex handling under macOS 2022-08-26 11:45:52 -07:00
gettext.h gettext: remove optional non-standard parens in N_() definition 2021-09-03 11:40:30 -07:00
git-add--interactive.perl add -p: avoid use of undefined $key when ReadKey -> EOF 2021-11-28 15:14:09 -08:00
git-archimport.perl
git-bisect.sh Merge branch 'mr/bisect-in-c-4' 2021-09-23 13:44:48 -07:00
git-compat-util.h Merge branch 'ab/unused-annotation' into maint-2.38 2022-10-27 15:24:12 -07:00
git-curl-compat.h http: check CURLE_SSL_PINNEDPUBKEYNOTMATCH when emitting errors 2021-09-27 10:58:07 -07:00
git-cvsexportcommit.perl
git-cvsimport.perl
git-cvsserver.perl git-cvsserver: clarify directory list 2022-07-19 12:45:31 -07:00
git-difftool--helper.sh
git-filter-branch.sh git-sh-setup: remove "sane_grep", it's not needed anymore 2021-10-21 16:17:57 -07:00
git-instaweb.sh git-sh-setup.sh: remove "say" function, change last users 2022-06-28 13:13:18 -07:00
git-merge-octopus.sh
git-merge-one-file.sh
git-merge-resolve.sh merge-resolve: abort if index does not match HEAD 2022-07-22 21:45:22 -07:00
git-mergetool--lib.sh vimdiff: add tool documentation 2022-04-03 15:09:52 -07:00
git-mergetool.sh
git-p4.py Merge branch 'kk/p4-client-name-encoding-fix' into maint 2022-08-10 21:52:33 -07:00
git-quiltimport.sh
git-request-pull.sh
git-send-email.perl i18n: fix some badly formatted i18n strings 2022-04-11 14:13:46 -07:00
git-sh-i18n.sh git-sh-i18n: remove unused eval_ngettext() 2021-10-21 16:04:29 -07:00
git-sh-setup.sh git-sh-setup.sh: remove "say" function, change last users 2022-06-28 13:13:18 -07:00
git-submodule.sh git-submodule.sh: use "$quiet", not "$GIT_QUIET" 2022-06-28 13:13:18 -07:00
git-svn.perl
GIT-VERSION-GEN Start 2.39 cycle 2022-10-07 17:19:59 -07:00
git-web--browse.sh
git.c Merge branch 'ds/cmd-main-reorder' 2022-10-21 11:37:29 -07:00
git.rc
gpg-interface.c Merge branch 'pw/ssh-sign-report-errors' into maint-2.38 2022-10-25 17:11:35 -07:00
gpg-interface.h gpg-interface: add function for converting trust level to string 2022-07-10 22:10:23 -07:00
graph.c log: fix memory leak if --graph is passed multiple times 2022-02-11 10:06:40 -08:00
graph.h log: fix memory leak if --graph is passed multiple times 2022-02-11 10:06:40 -08:00
grep.c Merge branch 'ab/grep-simplify-extended-expression' 2022-10-21 11:37:28 -07:00
grep.h Merge branch 'ab/grep-simplify-extended-expression' 2022-10-21 11:37:28 -07:00
hash-lookup.c
hash-lookup.h
hash.h Makefile + hash.h: remove PPC_SHA1 implementation 2022-08-31 14:37:31 -07:00
hashmap.c git-compat-util.h: use "UNUSED", not "UNUSED(var)" 2022-09-01 10:49:48 -07:00
hashmap.h
help.c help: fix doubled words in explanation for developer interfaces 2022-09-16 09:20:11 -07:00
help.h git docs: add a category for file formats, protocols and interfaces 2022-08-04 14:12:23 -07:00
hex.c
hook.c run-command API: have run_process_parallel() take an "opts" struct 2022-10-12 14:12:41 -07:00
hook.h hooks: fix an obscure TOCTOU "did we just run a hook?" race 2022-03-07 13:00:53 -08:00
http-backend.c git-compat-util.h: use "UNUSED", not "UNUSED(var)" 2022-09-01 10:49:48 -07:00
http-fetch.c Merge branch 'ep/maint-equals-null-cocci' for maint-2.35 2022-05-02 10:06:04 -07:00
http-push.c Merge branch 'ab/plug-leak-in-revisions' 2022-06-07 14:10:56 -07:00
http-walker.c tree-wide: apply equals-null.cocci 2022-05-02 09:50:37 -07:00
http.c Merge branch 'll/curl-accept-language' 2022-07-19 16:40:19 -07:00
http.h remote-curl: send Accept-Language header to server 2022-07-11 12:24:28 -07:00
ident.c git-compat-util.h: use "UNUSED", not "UNUSED(var)" 2022-09-01 10:49:48 -07:00
imap-send.c Merge branch 'bc/csprng-mktemps' 2022-04-06 15:21:59 -07:00
INSTALL Makefile + hash.h: remove PPC_SHA1 implementation 2022-08-31 14:37:31 -07:00
iterator.h
json-writer.c
json-writer.h
khash.h
kwset.c tree-wide: apply equals-null.cocci 2022-05-02 09:50:37 -07:00
kwset.h
levenshtein.c
levenshtein.h
LGPL-2.1
line-log.c
line-log.h
line-range.c
line-range.h
linear-assignment.c
linear-assignment.h
list-objects-filter-options.c list-objects-filter: initialize sub-filter structs 2022-09-22 12:43:04 -07:00
list-objects-filter-options.h list-objects-filter: convert filter_spec to a strbuf 2022-09-12 08:38:59 -07:00
list-objects-filter.c
list-objects-filter.h
list-objects.c list-objects: handle NULL function pointers 2022-03-09 10:25:27 -08:00
list-objects.h list-objects: consolidate traverse_commit_list[_filtered] 2022-03-09 10:25:27 -08:00
list.h *.h: move some *_INIT to designated initializers 2021-09-27 14:48:00 -07:00
ll-merge.c ll-merge: mark unused parameters in callbacks 2022-10-17 21:24:04 -07:00
ll-merge.h ll-merge: make callers responsible for showing warnings 2022-02-02 10:02:27 -08:00
lockfile.c
lockfile.h *.[ch] *_INIT macros: use { 0 } for a "zero out" idiom 2021-09-27 14:47:59 -07:00
log-tree.c Merge branch 'ab/unused-annotation' 2022-09-14 12:56:39 -07:00
log-tree.h log-tree.h: remove unused function declarations 2021-10-01 14:39:46 -07:00
ls-refs.c refs: get rid of global list of hidden refs 2022-11-17 16:22:51 -05:00
ls-refs.h
mailinfo.c mailinfo -b: fix an out of bounds access 2022-10-03 09:05:07 -07:00
mailinfo.h
mailmap.c Merge branch 'ep/maint-equals-null-cocci' 2022-05-20 15:26:59 -07:00
mailmap.h
Makefile Merge branch 'dd/document-runtime-prefix-better' into maint-2.38 2022-10-27 15:24:12 -07:00
match-trees.c object-file API: have write_object_file() take "enum object_type" 2022-02-25 17:16:31 -08:00
mem-pool.c mem-pool: don't assume uintmax_t is aligned enough for all types 2022-01-24 10:26:40 -08:00
mem-pool.h
merge-blobs.c ll-merge: make callers responsible for showing warnings 2022-02-02 10:02:27 -08:00
merge-blobs.h
merge-ort-wrappers.c merge-ort-wrappers: make printed message match the one from recursive 2022-07-22 21:45:22 -07:00
merge-ort-wrappers.h
merge-ort.c Merge branch 'jk/unused-anno-more' 2022-10-27 14:51:52 -07:00
merge-ort.h merge-ort: optionally produce machine-readable output 2022-06-22 16:10:06 -07:00
merge-recursive.c git-compat-util.h: use "UNUSED", not "UNUSED(var)" 2022-09-01 10:49:48 -07:00
merge-recursive.h merge-ort: format messages slightly different for use in headers 2022-02-02 10:02:27 -08:00
merge.c unpack-trees: introduce preserve_ignored to unpack_trees_options 2021-09-27 13:38:37 -07:00
mergesort.h mergesort: remove llist_mergesort() 2022-07-17 15:20:39 -07:00
midx.c Merge branch 'tb/midx-bitmap-selection-fix' 2022-10-27 14:51:52 -07:00
midx.h pack-bitmap-write: learn pack.writeBitmapLookupTable and add tests 2022-08-26 10:13:54 -07:00
name-hash.c git-compat-util.h: use "UNUSED", not "UNUSED(var)" 2022-09-01 10:49:48 -07:00
notes-cache.c object-file API: have write_object_file() take "enum object_type" 2022-02-25 17:16:31 -08:00
notes-cache.h
notes-merge.c misc *.c: use designated initializers for struct assignments 2022-03-17 10:36:42 -07:00
notes-merge.h
notes-utils.c
notes-utils.h
notes.c Merge branch 'ab/unused-annotation' 2022-09-14 12:56:39 -07:00
notes.h
object-file.c Merge branch 'jk/unused-anno-more' 2022-10-27 14:51:52 -07:00
object-name.c git-compat-util.h: use "UNUSED", not "UNUSED(var)" 2022-09-01 10:49:48 -07:00
object-store.h git-compat-util.h: use "UNUSED", not "UNUSED(var)" 2022-09-01 10:49:48 -07:00
object.c Merge branch 'jk/fsck-on-diet' into maint-2.38 2022-10-25 17:11:33 -07:00
object.h parse_object(): allow skipping hash check 2022-09-07 12:18:57 -07:00
oid-array.c
oid-array.h *.[ch] *_INIT macros: use { 0 } for a "zero out" idiom 2021-09-27 14:47:59 -07:00
oidmap.c git-compat-util.h: use "UNUSED", not "UNUSED(var)" 2022-09-01 10:49:48 -07:00
oidmap.h
oidset.c
oidset.h
oidtree.c oidtree: avoid unaligned access to crit-bit tree 2021-08-15 13:13:50 -07:00
oidtree.h
pack-bitmap-write.c pack-bitmap-write.c: instrument number of reused bitmaps 2022-10-13 13:35:08 -07:00
pack-bitmap.c Merge branch 'ds/bitmap-lookup-remove-tracing' 2022-09-26 21:46:51 -07:00
pack-bitmap.h pack-bitmap: prepare to read lookup table extension 2022-08-26 10:13:58 -07:00
pack-check.c object-file API: have hash_object_file() take "enum object_type" 2022-02-25 17:16:32 -08:00
pack-mtimes.c pack-mtimes: avoid closing a bogus file descriptor 2022-06-16 13:22:03 -07:00
pack-mtimes.h pack-mtimes: support reading .mtimes files 2022-05-26 15:48:26 -07:00
pack-objects.c pack-mtimes: support writing pack .mtimes files 2022-05-26 15:48:26 -07:00
pack-objects.h pack-objects.h: remove outdated pahole results 2022-06-28 15:39:03 -07:00
pack-revindex.c midx: read RIDX chunk when present 2022-01-27 12:07:53 -08:00
pack-revindex.h docs: move pack format docs to man section 5 2022-08-04 14:12:24 -07:00
pack-write.c pack-write: drop always-NULL parameter 2022-06-16 11:59:55 -07:00
pack.h pack-mtimes: support writing pack .mtimes files 2022-05-26 15:48:26 -07:00
packfile.c Merge branch 'ab/unused-annotation' 2022-09-14 12:56:39 -07:00
packfile.h Merge branch 'tb/pack-revindex-on-disk-cleanup' 2021-12-15 09:39:50 -08:00
pager.c git-compat-util.h: use "UNUSED", not "UNUSED(var)" 2022-09-01 10:49:48 -07:00
parallel-checkout.c checkout: fix two bugs on the final count of updated entries 2022-07-14 10:19:28 -07:00
parallel-checkout.h checkout: fix two bugs on the final count of updated entries 2022-07-14 10:19:28 -07:00
parse-options-cb.c branch: add flags and config to inherit tracking 2021-12-20 22:40:21 -08:00
parse-options.c parse-options: add support for parsing subcommands 2022-08-19 11:13:14 -07:00
parse-options.h parse-options: add support for parsing subcommands 2022-08-19 11:13:14 -07:00
patch-delta.c
patch-ids.c git-compat-util.h: use "UNUSED", not "UNUSED(var)" 2022-09-01 10:49:48 -07:00
patch-ids.h
path.c Merge branch 'ds/bundle-uri' 2022-06-03 14:30:34 -07:00
path.h repository.c: free the "path cache" in repo_clear() 2022-03-04 13:24:19 -08:00
pathspec.c pathspec.h: move pathspec_needs_expanded_index() from reset.c to here 2022-08-08 13:23:26 -07:00
pathspec.h pathspec.h: move pathspec_needs_expanded_index() from reset.c to here 2022-08-08 13:23:26 -07:00
pkt-line.c t0021: implementation the rot13-filter.pl script in C 2022-08-14 22:57:12 -07:00
pkt-line.h Merge branch 'mt/rot13-in-c' 2022-08-29 14:55:11 -07:00
preload-index.c preload-index: fix memleak 2022-08-22 15:08:30 -07:00
pretty.c Merge branch 'ab/unused-annotation' 2022-09-14 12:56:39 -07:00
pretty.h date API: create a date.h, split from cache.h 2022-02-16 09:40:00 -08:00
prio-queue.c tree-wide: apply equals-null.cocci 2022-05-02 09:50:37 -07:00
prio-queue.h
progress.c progress API: unify stop_progress{,_msg}(), fix trace2 bug 2022-02-03 15:39:59 -08:00
progress.h progress API: unify stop_progress{,_msg}(), fix trace2 bug 2022-02-03 15:39:59 -08:00
promisor-remote.c promisor-remote: die upon failing fetch 2022-10-05 11:06:53 -07:00
promisor-remote.h promisor-remote: remove a return value 2022-10-05 11:06:52 -07:00
prompt.c run-command API users: use strvec_push(), not argv construction 2021-11-25 22:15:07 -08:00
prompt.h
protocol-caps.c
protocol-caps.h
protocol.c
protocol.h
prune-packed.c
prune-packed.h
quote.c
quote.h
range-diff.c Merge branch 'ab/unused-annotation' 2022-09-14 12:56:39 -07:00
range-diff.h
reachable.c reachable: report precise timestamps from objects in cruft packs 2022-05-26 15:48:26 -07:00
reachable.h builtin/pack-objects.c: --cruft with expiration 2022-05-26 15:48:26 -07:00
read-cache.c read-cache: avoid misaligned reads in index v4 2022-09-28 10:32:18 -07:00
README.md Merge branch 'po/readme-mention-contributor-hints' 2022-02-09 14:20:59 -08:00
rebase-interactive.c sequencer: rewrite update-refs as user edits todo list 2022-07-19 12:49:04 -07:00
rebase-interactive.h
rebase.c
rebase.h
ref-filter.c Merge branch 'rj/ref-filter-get-head-description-leakfix' into maint-2.38 2022-10-27 15:24:11 -07:00
ref-filter.h for-each-ref: delay parsing of --sort=<atom> options 2021-10-20 14:33:07 -07:00
reflog-walk.c string-list: mark unused callback parameters 2022-10-17 21:24:04 -07:00
reflog-walk.h revisions API: release "reflog_info" in release revisions() 2022-04-13 23:56:10 -07:00
reflog.c refs: unify parse_worktree_ref() and ref_type() 2022-09-19 11:11:11 -07:00
reflog.h reflog: libify delete reflog function and helpers 2022-03-02 15:24:47 -08:00
refs.c refs: get rid of global list of hidden refs 2022-11-17 16:22:51 -05:00
refs.h refs: get rid of global list of hidden refs 2022-11-17 16:22:51 -05:00
refspec.c refspec.c: use designated initializers for "struct refspec_item" 2022-02-24 15:59:53 -08:00
refspec.h docs: move protocol-related docs to man section 5 2022-08-04 14:12:23 -07:00
RelNotes Downmerge a handful of topics for 2.38.2 2022-10-25 17:11:39 -07:00
remote-curl.c remote-curl: add 'get' capability 2022-08-10 14:07:37 -07:00
remote.c git-compat-util.h: use "UNUSED", not "UNUSED(var)" 2022-09-01 10:49:48 -07:00
remote.h Merge branch 'rs/mergesort' 2022-08-03 13:36:09 -07:00
replace-object.c git-compat-util.h: use "UNUSED", not "UNUSED(var)" 2022-09-01 10:49:48 -07:00
replace-object.h
repo-settings.c Merge branch 'jk/plug-list-object-filter-leaks' 2022-09-14 12:56:40 -07:00
repository.c Merge branch 'ab/plug-random-leaks' 2022-03-13 22:56:18 +00:00
repository.h Merge branch 'ab/submodule-helper-prep' 2022-09-13 11:38:23 -07:00
rerere.c Merge branch 'ep/maint-equals-null-cocci' 2022-05-20 15:26:59 -07:00
rerere.h
reset.c Merge branch 'pw/use-in-process-checkout-in-rebase' 2022-02-18 13:53:27 -08:00
reset.h rebase --apply: set ORIG_HEAD correctly 2022-01-26 12:08:53 -08:00
resolve-undo.c
resolve-undo.h
revision.c revision: add new parameter to exclude hidden refs 2022-11-17 16:22:52 -05:00
revision.h revision: add new parameter to exclude hidden refs 2022-11-17 16:22:52 -05:00
run-command.c run-command.c: remove "max_processes", add "const" to signal() handler 2022-10-12 14:12:42 -07:00
run-command.h run-command API: move *_tr2() users to "run_processes_parallel()" 2022-10-12 14:12:41 -07:00
scalar.c scalar: make 'unregister' idempotent 2022-09-27 09:32:26 -07:00
SECURITY.md
send-pack.c git-compat-util.h: use "UNUSED", not "UNUSED(var)" 2022-09-01 10:49:48 -07:00
send-pack.h send-pack.c: add config push.useBitmaps 2022-06-17 14:31:01 -07:00
sequencer.c Merge branch 'jk/sequencer-missing-author-name-check' into maint-2.38 2022-10-25 17:11:38 -07:00
sequencer.h sequencer: rewrite update-refs as user edits todo list 2022-07-19 12:49:04 -07:00
serve.c serve.c: remove unnecessary include 2022-04-06 09:42:12 -07:00
serve.h
server-info.c git-compat-util.h: use "UNUSED", not "UNUSED(var)" 2022-09-01 10:49:48 -07:00
setup.c Merge branch 'js/safe-directory-plus' into maint 2022-08-26 11:13:12 -07:00
sh-i18n--envsubst.c tree-wide: apply equals-null.cocci 2022-05-02 09:50:37 -07:00
sha1dc_git.c
sha1dc_git.h
shallow.c git-compat-util.h: use "UNUSED", not "UNUSED(var)" 2022-09-01 10:49:48 -07:00
shallow.h *.h: move some *_INIT to designated initializers 2021-09-27 14:48:00 -07:00
shared.mak cocci: add a "coccicheck-test" target and test *.cocci rules 2022-07-06 12:24:43 -07:00
shell.c Sync with 2.32.4 2022-10-06 17:42:02 -04:00
shortlog.h
sideband.c
sideband.h
sigchain.c
sigchain.h
simple-ipc.h Merge branch 'jh/builtin-fsmonitor-part1' 2021-10-13 15:15:58 -07:00
sparse-index.c Merge branch 'ds/sparse-sparse-checkout' 2022-06-03 14:30:35 -07:00
sparse-index.h Merge branch 'ds/sparse-sparse-checkout' 2022-06-03 14:30:35 -07:00
split-index.c split-index: it really is incompatible with the sparse index 2022-01-23 17:06:23 -08:00
split-index.h
stable-qsort.c stable-qsort: avoid using potentially unaligned access 2022-01-07 15:48:40 -08:00
strbuf.c git-compat-util.h: use "UNUSED", not "UNUSED(var)" 2022-09-01 10:49:48 -07:00
strbuf.h strbuf.h: use BUG(...) not die("BUG: ...") 2021-12-07 12:31:16 -08:00
streaming.c git-compat-util.h: use "UNUSED", not "UNUSED(var)" 2022-09-01 10:49:48 -07:00
streaming.h
string-list.c string-list: mark unused callback parameters 2022-10-17 21:24:04 -07:00
string-list.h string-list: document iterator behavior on NULL input 2022-09-27 09:32:26 -07:00
strmap.c git-compat-util.h: use "UNUSED", not "UNUSED(var)" 2022-09-01 10:49:48 -07:00
strmap.h
strvec.c
strvec.h *.h: move some *_INIT to designated initializers 2021-09-27 14:48:00 -07:00
sub-process.c git-compat-util.h: use "UNUSED", not "UNUSED(var)" 2022-09-01 10:49:48 -07:00
sub-process.h
submodule-config.c run-command API: don't fall back on online_cpus() 2022-10-12 14:12:41 -07:00
submodule-config.h Merge branch 'pb/submodule-recurse-mode-enum' 2022-05-20 15:26:53 -07:00
submodule.c run-command API: move *_tr2() users to "run_processes_parallel()" 2022-10-12 14:12:41 -07:00
submodule.h submodule API: don't handle SM_..{UNSPECIFIED,COMMAND} in to_string() 2022-09-02 09:16:24 -07:00
symlinks.c symlinks: do not include startup_info->original_cwd in dir removal 2021-12-09 13:33:13 -08:00
tag.c ssh signing: make verify-tag consider key lifetime 2021-12-09 13:38:04 -08:00
tag.h
tar.h
tempfile.c tempfile: update comment describing state transitions 2022-08-30 14:16:51 -07:00
tempfile.h tempfile: drop active flag 2022-08-30 14:16:49 -07:00
thread-utils.c
thread-utils.h
tmp-objdir.c tmp-objdir: skip clean up when handling a signal 2022-09-30 21:26:58 -07:00
tmp-objdir.h log: clean unneeded objects during log --remerge-diff 2022-02-02 10:02:27 -08:00
trace2.c common-main.c: move non-trace2 exit() behavior out of trace2.c 2022-06-02 12:51:30 -07:00
trace2.h common-main.c: move non-trace2 exit() behavior out of trace2.c 2022-06-02 12:51:30 -07:00
trace.c C99: remove hardcoded-out !HAVE_VARIADIC_MACROS code 2022-02-21 19:14:19 -08:00
trace.h C99: remove hardcoded-out !HAVE_VARIADIC_MACROS code 2022-02-21 19:14:19 -08:00
trailer.c git-compat-util.h: use "UNUSED", not "UNUSED(var)" 2022-09-01 10:49:48 -07:00
trailer.h
transport-helper.c list-objects-filter: add and use initializers 2022-09-12 08:38:59 -07:00
transport-internal.h
transport.c Sync with 2.37.4 2022-10-06 20:00:04 -04:00
transport.h push: new config option "push.autoSetupRemote" supports "simple" push 2022-04-29 11:20:55 -07:00
tree-diff.c pathspec: use BUG(...) not die("BUG:%s:%d....", <file>, <line>) 2021-12-07 12:31:17 -08:00
tree-walk.c tree-walk: add a mechanism for getting non-canonicalized modes 2022-08-10 14:26:25 -07:00
tree-walk.h tree-walk: add a mechanism for getting non-canonicalized modes 2022-08-10 14:26:25 -07:00
tree.c
tree.h
unicode-width.h
unimplemented.sh
unix-socket.c
unix-socket.h
unix-stream-server.c
unix-stream-server.h
unpack-trees.c Merge branch 'vd/sparse-reset-checkout-fixes' 2022-09-09 12:02:26 -07:00
unpack-trees.h unpack-trees: refuse to remove startup_info->original_cwd 2021-12-09 13:33:12 -08:00
upload-pack.c refs: get rid of global list of hidden refs 2022-11-17 16:22:51 -05:00
upload-pack.h
url.c
url.h
urlmatch.c urlmatch.c: add and use a *_release() function 2022-03-04 13:24:18 -08:00
urlmatch.h urlmatch.c: add and use a *_release() function 2022-03-04 13:24:18 -08:00
usage.c i18n: mark message helpers prefix for translation 2022-06-21 10:06:54 -07:00
userdiff.c Merge branch 'jd/userdiff-kotlin' 2022-03-23 14:09:29 -07:00
userdiff.h
utf8.c
utf8.h
varint.c
varint.h
version.c
version.h
versioncmp.c
walker.c git-compat-util.h: use "UNUSED", not "UNUSED(var)" 2022-09-01 10:49:48 -07:00
walker.h
wildmatch.c tree-wide: apply equals-null.cocci 2022-05-02 09:50:37 -07:00
wildmatch.h
worktree.c refs: unify parse_worktree_ref() and ref_type() 2022-09-19 11:11:11 -07:00
worktree.h refs: unify parse_worktree_ref() and ref_type() 2022-09-19 11:11:11 -07:00
wrap-for-bin.sh
wrapper.c Merge branch 'jk/pipe-command-nonblock' 2022-08-25 14:42:32 -07:00
write-or-die.c environ: GIT_FLUSH should be made a usual Boolean 2022-09-15 11:34:51 -07:00
ws.c Merge branch 'nd/the-index' 2018-10-19 13:34:02 +09:00
wt-status.c git-compat-util.h: use "UNUSED", not "UNUSED(var)" 2022-09-01 10:49:48 -07:00
wt-status.h
xdiff-interface.c Merge branch 'ep/maint-equals-null-cocci' for maint-2.35 2022-05-02 10:06:04 -07:00
xdiff-interface.h
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 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 with just "subscribe git" in the body to majordomo@vger.kernel.org (not the Git list). 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