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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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Jeff King 61c7711cfe sha1-file: use loose object cache for quick existence check 
In cases where we expect to ask has_sha1_file() about a lot of objects
that we are not likely to have (e.g., during fetch negotiation), we
already use OBJECT_INFO_QUICK to sacrifice accuracy (due to racing with
a simultaneous write or repack) for speed (we avoid re-scanning the pack
directory).

However, even checking for loose objects can be expensive, as we will
stat() each one. On many systems this cost isn't too noticeable, but
stat() can be particularly slow on some operating systems, or due to
network filesystems.

Since the QUICK flag already tells us that we're OK with a slightly
stale answer, we can use that as a cue to look in our in-memory cache of
each object directory. That basically trades an in-memory binary search
for a stat() call.

Note that it is possible for this to actually be _slower_. We'll do a
full readdir() to fill the cache, so if you have a very large number of
loose objects and a very small number of lookups, that readdir() may end
up more expensive.

This shouldn't be a big deal in practice. If you have a large number of
reachable loose objects, you'll already run into performance problems
(which you should remedy by repacking). You may have unreachable objects
which wouldn't otherwise impact performance. Usually these would go away
with the prune step of "git gc", but they may be held for up to 2 weeks
in the default configuration.

So it comes down to how many such objects you might reasonably expect to
have, how much slower is readdir() on N entries versus M stat() calls
(and here we really care about the syscall backing readdir(), like
getdents() on Linux, but I'll just call this readdir() below).

If N is much smaller than M (a typical packed repo), we know this is a
big win (few readdirs() followed by many uses of the resulting cache).
When N and M are similar in size, it's also a win. We care about the
latency of making a syscall, and readdir() should be giving us many
values in a single call. How many?

On Linux, running "strace -e getdents ls" shows a 32k buffer getting 512
entries per call (which is 64 bytes per entry; the name itself is 38
bytes, plus there are some other fields). So we can imagine that this is
always a win as long as the number of loose objects in the repository is
a factor of 500 less than the number of lookups you make. It's hard to
auto-tune this because we don't generally know up front how many lookups
we're going to do. But it's unlikely for this to perform significantly
worse.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-11-13 14:22:03 +09:00
.github
block-sha1
builtin sha1-file: use an object_directory for the main object dir 2018-11-13 14:22:03 +09:00
ci ci: add optional test variables 2018-10-19 09:21:28 +09:00
compat Merge branch 'js/mingw-ns-filetime' 2018-11-06 15:50:21 +09:00
contrib Merge branch 'nd/completion-negation' 2018-11-06 15:50:20 +09:00
Documentation Ninth batch for 2.20 2018-11-06 15:51:23 +09:00
ewah ewok_rlw.h: add missing 'inline' to function definition 2018-10-29 10:14:19 +09:00
git-gui Merge branch 'cb/git-gui-ttk-style' 2018-04-25 13:28:49 +09:00
gitk-git
gitweb gitweb: hard-depend on the Digest::MD5 5.8 module 2018-03-05 10:52:27 -08:00
mergetools mergetools: add support for guiffy 2018-04-06 08:11:39 +09:00
negotiator Merge branch 'jt/fetch-negotiator-skipping' 2018-08-02 15:30:46 -07:00
perl Merge branch 'ab/git-svn-get-record-typofix' 2018-05-08 15:59:28 +09:00
po l10n: zh_CN: for git v2.19.0 l10n round 1 to 2 2018-09-09 22:38:39 +08:00
ppc
refs Merge branch 'bc/hash-transition-part-15' 2018-10-30 15:43:42 +09:00
sha1collisiondetection@232357eb2e sha1dc: update from upstream 2018-08-02 13:54:58 -07:00
sha1dc sha1dc: update from upstream 2018-08-02 13:54:58 -07:00
t Merge branch 'sg/test-verbose-log' 2018-11-06 15:50:23 +09:00
templates Update shell scripts to compute empty tree object ID 2018-05-02 13:59:53 +09:00
vcs-svn headers: normalize the spelling of some header guards 2018-10-18 13:39:35 +09:00
xdiff Merge branch 'sb/indent-heuristic-optim' 2018-08-17 13:09:57 -07:00
.clang-format editorconfig: indicate settings should be kept in sync 2018-10-09 18:34:15 +09:00
.editorconfig editorconfig: indicate settings should be kept in sync 2018-10-09 18:34:15 +09:00
.gitattributes .gitattributes: add conflict-marker-size for relevant files 2018-08-29 11:27:31 -07:00
.gitignore Merge branch 'ag/rebase-i-in-c' 2018-11-02 11:04:53 +09:00
.gitmodules
.mailmap Merge branch 'jn/mailmap-update' 2018-10-16 16:16:01 +09:00
.travis.yml travis-ci: no longer use containers 2018-10-26 13:32:43 +09:00
.tsan-suppressions ThreadSanitizer: add suppressions 2017-08-23 10:38:56 -07:00
abspath.c real_path: clarify return value ownership 2017-09-27 09:13:47 +09:00
aclocal.m4
advice.c Merge branch 'ab/checkout-default-remote' 2018-08-02 15:30:41 -07:00
advice.h Merge branch 'ab/checkout-default-remote' 2018-08-02 15:30:41 -07:00
alias.c completion: add and use --list-cmds=alias 2018-05-21 13:23:14 +09:00
alias.h headers: normalize the spelling of some header guards 2018-10-18 13:39:35 +09:00
alloc.c alloc: make allocate_alloc_state and clear_alloc_state more consistent 2018-08-15 11:52:09 -07:00
alloc.h alloc: make allocate_alloc_state and clear_alloc_state more consistent 2018-08-15 11:52:09 -07:00
apply.c Merge branch 'bc/hash-transition-part-15' 2018-10-30 15:43:42 +09:00
apply.h Merge branch 'en/incl-forward-decl' 2018-08-20 12:41:32 -07:00
archive-tar.c Merge branch 'nd/no-the-index' 2018-08-20 11:33:53 -07:00
archive-zip.c userdiff.c: remove implicit dependency on the_index 2018-09-21 09:50:58 -07:00
archive.c archive: initialize archivers earlier 2018-10-26 10:17:59 +09:00
archive.h archive: initialize archivers earlier 2018-10-26 10:17:59 +09:00
argv-array.c Merge branch 'ma/unpack-trees-free-msgs' 2018-05-30 21:51:29 +09:00
argv-array.h Merge branch 'ma/unpack-trees-free-msgs' 2018-05-30 21:51:29 +09:00
attr.c Make git_check_attr() a void function 2018-09-12 15:15:34 -07:00
attr.h Make git_check_attr() a void function 2018-09-12 15:15:34 -07:00
banned.h banned.h: mark strncpy() as banned 2018-07-26 10:12:51 -07:00
base85.c
bisect.c Merge branch 'nd/the-index' 2018-10-19 13:34:02 +09:00
bisect.h Add missing includes and forward declarations 2018-08-15 11:52:09 -07:00
blame.c Merge branch 'nd/the-index' 2018-10-19 13:34:02 +09:00
blame.h blame.c: remove implicit dependency on the_index 2018-08-13 14:14:44 -07:00
blob.c blob: allow lookup_blob to handle arbitrary repositories 2018-06-29 10:43:39 -07:00
blob.h blob: allow lookup_blob to handle arbitrary repositories 2018-06-29 10:43:39 -07:00
branch.c Merge branch 'ab/unconditional-free-and-null' 2018-08-27 14:33:42 -07:00
branch.h Move definition of enum branch_track from cache.h to branch.h 2018-08-15 11:52:09 -07:00
builtin.h Merge branch 'ag/rebase-i-in-c' 2018-11-02 11:04:53 +09:00
bulk-checkin.c convert "oidcmp() == 0" to oideq() 2018-08-29 11:32:49 -07:00
bulk-checkin.h Add missing includes and forward declarations 2018-08-15 11:52:09 -07:00
bundle.c Merge branch 'nd/the-index' 2018-10-19 13:34:02 +09:00
bundle.h
cache-tree.c Merge branch 'jt/cache-tree-allow-missing-object-in-partial-clone' 2018-10-19 13:34:08 +09:00
cache-tree.h Merge branch 'nd/unpack-trees-with-cache-tree' 2018-09-17 13:53:53 -07:00
cache.h Merge branch 'ag/rebase-i-in-c' 2018-11-02 11:04:53 +09:00
chdir-notify.c add chdir-notify API 2018-03-30 12:49:57 -07:00
chdir-notify.h add chdir-notify API 2018-03-30 12:49:57 -07:00
check_bindir
check-builtins.sh
check-racy.c
checkout.c checkout & worktree: introduce checkout.defaultRemote 2018-06-11 09:41:02 -07:00
checkout.h checkout: pass the "num_matches" up to callers 2018-06-11 09:41:01 -07:00
color.c color: protect against out-of-bounds reads and writes 2018-08-03 08:52:05 -07:00
color.h range-diff: use dim/bold cues to improve dual color mode 2018-08-13 10:44:52 -07:00
column.c Replace all die("BUG: ...") calls by BUG() ones 2018-05-06 19:06:13 +09:00
column.h Add missing includes and forward declarations 2018-08-15 11:52:09 -07:00
combine-diff.c Merge branch 'nd/the-index' 2018-10-19 13:34:02 +09:00
command-list.txt Merge branch 'du/cherry-is-plumbing' 2018-10-26 14:22:14 +09:00
commit-graph.c sha1-file: use an object_directory for the main object dir 2018-11-13 14:22:03 +09:00
commit-graph.h Merge branch 'ds/commit-graph-with-grafts' 2018-10-16 16:15:59 +09:00
commit-reach.c Merge branch 'ds/reachable' 2018-10-30 15:43:47 +09:00
commit-reach.h Merge branch 'rj/header-cleanup' 2018-11-06 15:50:23 +09:00
commit-slab-decl.h commit-slab: support shared commit-slab 2018-05-21 14:07:19 +09:00
commit-slab-impl.h commit-slabs: move MAYBE_UNUSED out 2018-10-24 14:52:50 +09:00
commit-slab.h commit-slab: support shared commit-slab 2018-05-21 14:07:19 +09:00
commit.c Merge branch 'pk/rebase-in-c-4-opts' 2018-11-02 11:04:55 +09:00
commit.h Merge branch 'js/shallow-and-fetch-prune' 2018-11-06 15:50:18 +09:00
common-main.c Merge branch 'dj/runtime-prefix' 2018-05-08 15:59:17 +09:00
config.c Merge branch 'bp/read-cache-parallel' 2018-10-19 13:34:03 +09:00
config.h config: add new index.threads config setting 2018-10-11 15:32:48 +09:00
config.mak.dev Merge branch 'jk/unused-function' 2018-10-30 15:43:46 +09:00
config.mak.in
config.mak.uname mingw: implement nanosecond-precision file times 2018-10-24 13:18:14 +09:00
configure.ac Merge branch 'es/fread-reads-dir-autoconf-fix' 2018-04-25 13:29:01 +09:00
connect.c convert "oidcmp() == 0" to oideq() 2018-08-29 11:32:49 -07:00
connect.h fixup! connect.h: avoid forward declaration of an enum 2018-07-09 14:35:39 -07:00
connected.c fetch-pack: write shallow, then check connectivity 2018-07-03 14:57:44 -07:00
connected.h connected: document connectivity in partial clones 2018-09-21 13:20:47 -07:00
convert.c Make git_check_attr() a void function 2018-09-12 15:15:34 -07:00
convert.h Merge branch 'en/incl-forward-decl' 2018-08-20 12:41:32 -07:00
copy.c
COPYING
credential-cache--daemon.c tempfile: auto-allocate tempfiles on heap 2017-09-06 17:19:54 +09:00
credential-cache.c Merge branch 'dl/credential-cache-socket-in-xdg-cache' into maint 2017-08-23 14:33:45 -07:00
credential-store.c
credential.c credential: ignore SIGPIPE when writing to credential helpers 2018-03-29 15:33:55 -07:00
credential.h
csum-file.c csum-file: refactor finalize_hashfile() method 2018-04-02 14:27:30 -07:00
csum-file.h Add missing includes and forward declarations 2018-08-15 11:52:09 -07:00
ctype.c
daemon.c Merge branch 'lw/daemon-log-destination' 2018-04-25 13:28:58 +09:00
date.c Replace all die("BUG: ...") calls by BUG() ones 2018-05-06 19:06:13 +09:00
decorate.c decorate: clean up and document API 2017-12-08 09:16:27 -08:00
decorate.h decorate: clean up and document API 2017-12-08 09:16:27 -08:00
delta-islands.c pack-objects: move 'layer' into 'struct packing_data' 2018-08-16 10:56:44 -07:00
delta-islands.h delta-islands.h: add missing forward declarations (hdr-check) 2018-09-20 11:50:43 -07:00
delta.h comments: fix misuses of "nor" 2014-03-31 15:29:27 -07:00
detect-compiler Makefile: detect compiler and enable more warnings in DEVELOPER=1 2018-04-16 13:54:53 +09:00
diff-delta.c Merge branch 'mk/diff-delta-avoid-large-offset' 2017-09-28 14:47:56 +09:00
diff-lib.c Merge branch 'nd/the-index' 2018-10-19 13:34:02 +09:00
diff-no-index.c diff.c: remove implicit dependency on the_index 2018-09-21 09:48:10 -07:00
diff.c Merge branch 'js/diff-notice-has-drive-prefix' 2018-10-30 15:43:45 +09:00
diff.h Merge branch 'nd/the-index' 2018-10-19 13:34:02 +09:00
diffcore-break.c Merge branch 'nd/the-index' 2018-10-19 13:34:02 +09:00
diffcore-delta.c diff.c: reduce implicit dependency on the_index 2018-09-21 09:48:10 -07:00
diffcore-order.c
diffcore-pickaxe.c userdiff.c: remove implicit dependency on the_index 2018-09-21 09:50:58 -07:00
diffcore-rename.c Merge branch 'nd/the-index' 2018-10-19 13:34:02 +09:00
diffcore.h diff.c: reduce implicit dependency on the_index 2018-09-21 09:48:10 -07:00
dir-iterator.c Replace all die("BUG: ...") calls by BUG() ones 2018-05-06 19:06:13 +09:00
dir-iterator.h Add missing includes and forward declarations 2018-08-15 11:52:09 -07:00
dir.c Merge branch 'jk/cocci' 2018-09-17 13:53:57 -07:00
dir.h dir.c: remove an implicit dependency on the_index in pathspec code 2018-08-13 14:14:42 -07:00
editor.c editor: add a function to launch the sequence editor 2018-08-10 11:56:22 -07:00
entry.c Merge branch 'nd/clone-case-smashing-warning' 2018-09-17 13:53:47 -07:00
environment.c sha1-file: use an object_directory for the main object dir 2018-11-13 14:22:03 +09:00
exec-cmd.c exec-cmd.c: mark more strings for translation 2018-07-23 11:19:10 -07:00
exec-cmd.h Merge branch 'dj/runtime-prefix' 2018-05-08 15:59:17 +09:00
fast-import.c Merge branch 'jk/cocci' 2018-09-17 13:53:57 -07:00
fetch-negotiator.c negotiator: unknown fetch.negotiationAlgorithm should error out 2018-08-01 11:07:47 -07:00
fetch-negotiator.h headers: normalize the spelling of some header guards 2018-10-18 13:39:35 +09:00
fetch-object.c fetch-object: set exact_oid when fetching 2018-09-13 13:57:31 -07:00
fetch-object.h fetch-object.h: add missing declaration (hdr-check) 2018-10-29 10:14:17 +09:00
fetch-pack.c Merge branch 'tb/filter-alternate-refs' 2018-10-19 13:34:08 +09:00
fetch-pack.h fetch-pack: exclude blobs when lazy-fetching trees 2018-10-04 06:03:49 -07:00
fmt-merge-msg.h
fsck.c Merge branch 'jc/cocci-preincr' 2018-10-30 15:43:48 +09:00
fsck.h fsck: use oidset instead of oid_array for skipList 2018-09-12 15:17:46 -07:00
fsmonitor.c Merge branch 'jk/snprintf-truncation' 2018-05-30 21:51:28 +09:00
fsmonitor.h Add missing includes and forward declarations 2018-08-15 11:52:09 -07:00
fuzz-pack-headers.c fuzz: add basic fuzz testing target. 2018-10-15 14:28:59 +09:00
fuzz-pack-idx.c fuzz: add fuzz testing for packfile indices. 2018-10-15 14:29:03 +09:00
generate-cmdlist.sh generate-cmdlist.sh: collect config from all config.txt files 2018-08-21 11:28:11 -07:00
gettext.c Merge branch 'js/runtime-prefix' 2018-05-08 15:59:34 +09:00
gettext.h
git-add--interactive.perl Merge branch 'pw/add-p-recount' 2018-06-28 12:53:32 -07:00
git-archimport.perl archimport: use safe_pipe_capture for user input 2017-09-12 11:08:15 +09:00
git-bisect.sh Merge branch 'sb/bisect-run-empty' 2017-11-15 12:14:36 +09:00
git-compat-util.h Merge branch 'cb/khash-maybe-unused-function' 2018-10-30 15:43:48 +09:00
git-cvsexportcommit.perl
git-cvsimport.perl perl: call timegm and timelocal with 4-digit year 2018-02-23 14:47:06 -08:00
git-cvsserver.perl cvsserver: use safe_pipe_capture for constant commands as well 2017-09-11 14:52:29 +09:00
git-difftool--helper.sh
git-filter-branch.sh Merge branch 'mb/filter-branch-optim' 2018-07-18 12:20:32 -07:00
git-instaweb.sh git-instaweb: fix apache2 config with apache >= 2.4 2018-08-08 08:30:07 -07:00
git-legacy-rebase.sh Merge branch 'ag/rebase-i-in-c' 2018-11-02 11:04:53 +09:00
git-merge-octopus.sh Merge branch 'ma/up-to-date' 2017-09-10 17:08:22 +09:00
git-merge-one-file.sh merge-one-file: compute empty blob object ID 2018-05-02 13:59:53 +09:00
git-merge-resolve.sh scripts: use "git foo" not "git-foo" 2017-08-07 12:04:45 -07:00
git-mergetool--lib.sh mergetool: accept -g/--[no-]gui as arguments 2018-10-25 14:01:10 +09:00
git-mergetool.sh mergetool: accept -g/--[no-]gui as arguments 2018-10-25 14:01:10 +09:00
git-p4.py git-p4: fully support unshelving changelists 2018-10-16 13:28:49 +09:00
git-parse-remote.sh
git-quiltimport.sh
git-rebase--am.sh Merge branch 'pw/rebase-signoff' 2018-04-25 13:28:51 +09:00
git-rebase--common.sh rebase: refactor common shell functions into their own file 2018-08-06 13:08:01 -07:00
git-rebase--merge.sh Merge branch 'en/rebase-i-microfixes' 2018-07-18 12:20:33 -07:00
git-rebase--preserve-merges.sh Merge branch 'ag/rebase-i-in-c' 2018-11-02 11:04:53 +09:00
git-remote-testgit.sh
git-request-pull.sh request-pull: capitalise "Git" to make it a proper noun 2017-10-03 13:11:57 +09:00
git-send-email.perl Merge branch 'jw/send-email-no-auth' 2018-11-06 15:50:20 +09:00
git-sh-i18n.sh git-sh-i18n: check GETTEXT_POISON before USE_GETTEXT_SCHEME 2018-02-08 10:09:45 -08:00
git-sh-setup.sh
git-stash.sh Merge branch 'tg/stash-untracked-with-pathspec-fix' 2018-04-10 08:25:45 +09:00
git-submodule.sh submodule: make zero-oid comparison hash function agnostic 2018-10-15 12:53:16 +09:00
git-svn.perl git-svn: search --authors-prog in PATH too 2018-04-05 06:55:02 +00:00
GIT-VERSION-GEN Git 2.19.1 2018-09-27 11:52:33 -07:00
git-web--browse.sh
git.c Merge branch 'ag/rebase-i-in-c' 2018-11-02 11:04:53 +09:00
git.rc mingw: include the full version information in the resources 2017-11-01 13:43:52 +09:00
gpg-interface.c Merge branch 'mg/gpg-fingerprint' 2018-11-03 00:53:58 +09:00
gpg-interface.h gpg-interface.c: obtain primary key fingerprint as well 2018-10-23 08:00:43 +09:00
graph.c Merge branch 'np/log-graph-octopus-fix' 2018-10-26 14:22:11 +09:00
graph.h
grep.c userdiff.c: remove implicit dependency on the_index 2018-09-21 09:50:58 -07:00
grep.h userdiff.c: remove implicit dependency on the_index 2018-09-21 09:50:58 -07:00
hash.h hash: update obsolete reference to SHA1_HEADER 2018-02-09 09:56:10 -08:00
hashmap.c hashmap: add API to disable item counting when threaded 2017-09-07 09:42:02 +09:00
hashmap.h Merge branch 'rb/hashmap-h-compilation-fix' into maint 2018-03-22 14:24:15 -07:00
help.c help -a: improve and make --verbose default 2018-10-03 21:23:51 -07:00
help.h sideband: highlight keywords in remote sideband output 2018-08-08 15:20:09 -07:00
hex.c hex: switch to using the_hash_algo 2018-07-16 14:27:39 -07:00
http-backend.c Merge branch 'ds/multi-pack-index' 2018-09-17 13:53:50 -07:00
http-fetch.c Merge branch 'ma/http-walker-no-partial' 2018-05-08 15:59:35 +09:00
http-push.c Merge branch 'nd/the-index' 2018-10-19 13:34:02 +09:00
http-walker.c sha1_file_name(): overwrite buffer instead of appending 2018-11-13 14:22:02 +09:00
http.c sha1_file_name(): overwrite buffer instead of appending 2018-11-13 14:22:02 +09:00
http.h Merge branch 'jk/snprintf-truncation' 2018-05-30 21:51:28 +09:00
ident.c mingw: use domain information for default email 2018-10-16 12:59:57 +09:00
imap-send.c Replace all die("BUG: ...") calls by BUG() ones 2018-05-06 19:06:13 +09:00
INSTALL RelNotes: add details on Perl module changes 2018-03-16 16:07:37 -07:00
interdiff.c interdiff: teach show_interdiff() to indent interdiff 2018-07-23 12:50:06 -07:00
interdiff.h interdiff: teach show_interdiff() to indent interdiff 2018-07-23 12:50:06 -07:00
iterator.h
json-writer.c json_writer: new routines to create JSON data 2018-07-16 13:55:39 -07:00
json-writer.h json-writer.h: add missing include (hdr-check) 2018-09-20 11:50:00 -07:00
khash.h khash: silence -Wunused-function for delta-islands 2018-10-24 14:52:50 +09:00
kwset.c Replace Free Software Foundation address in license notices 2017-11-09 13:21:21 +09:00
kwset.h Replace Free Software Foundation address in license notices 2017-11-09 13:21:21 +09:00
levenshtein.c
levenshtein.h
LGPL-2.1
line-log.c line-range.c: remove implicit dependency on the_index 2018-09-21 09:51:18 -07:00
line-log.h ALLOC_GROW: avoid -Wsign-compare warnings 2017-09-22 13:21:11 +09:00
line-range.c line-range.c: remove implicit dependency on the_index 2018-09-21 09:51:18 -07:00
line-range.h line-range.c: remove implicit dependency on the_index 2018-09-21 09:51:18 -07:00
linear-assignment.c linear-assignment: fix potential out of bounds memory access 2018-09-14 09:10:26 -07:00
linear-assignment.h linear-assignment: a function to solve least-cost assignment problems 2018-08-13 10:44:50 -07:00
list-objects-filter-options.c list-objects-filter: implement filter tree:0 2018-10-07 08:55:00 +09:00
list-objects-filter-options.h list-objects-filter: implement filter tree:0 2018-10-07 08:55:00 +09:00
list-objects-filter.c list-objects: support for skipping tree traversal 2018-10-18 12:49:18 +09:00
list-objects-filter.h Merge branch 'md/filter-trees' 2018-10-30 15:43:39 +09:00
list-objects.c Merge branch 'md/filter-trees' 2018-10-30 15:43:39 +09:00
list-objects.h Add missing includes and forward declarations 2018-08-15 11:52:09 -07:00
list.h tempfile: use list.h for linked list 2017-09-06 17:19:54 +09:00
ll-merge.c Merge branch 'nd/the-index' 2018-10-19 13:34:02 +09:00
ll-merge.h ll-merge.c: remove implicit dependency on the_index 2018-09-21 09:48:10 -07:00
lockfile.c Replace all die("BUG: ...") calls by BUG() ones 2018-05-06 19:06:13 +09:00
lockfile.h reopen_tempfile(): truncate opened file 2018-09-05 09:46:16 -07:00
log-tree.c Merge branch 'jk/cocci' 2018-09-17 13:53:57 -07:00
log-tree.h format-patch: make cover letters always text/plain 2018-05-02 12:55:00 +09:00
ls-refs.c ls-refs: introduce ls-refs server command 2018-03-15 12:01:08 -07:00
ls-refs.h ls-refs: introduce ls-refs server command 2018-03-15 12:01:08 -07:00
mailinfo.c mailinfo: support format=flowed 2018-08-29 13:05:35 -07:00
mailinfo.h Merge branch 'rs/mailinfo-format-flowed' 2018-09-17 13:53:57 -07:00
mailmap.c object-store: move object access functions to object-store.h 2018-05-16 11:42:03 +09:00
mailmap.h Add missing includes and forward declarations 2018-08-15 11:52:09 -07:00
Makefile Merge branch 'ag/rebase-i-in-c' 2018-11-02 11:04:53 +09:00
match-trees.c convert "oidcmp() != 0" to "!oideq()" 2018-08-29 11:32:49 -07:00
mem-pool.c block alloc: add validations around cache_entry lifecyle 2018-07-03 10:58:27 -07:00
mem-pool.h block alloc: add validations around cache_entry lifecyle 2018-07-03 10:58:27 -07:00
merge-blobs.c merge-blobs.c: remove implicit dependency on the_index 2018-09-21 09:48:10 -07:00
merge-blobs.h merge-blobs.c: remove implicit dependency on the_index 2018-09-21 09:48:10 -07:00
merge-recursive.c Merge branch 'en/merge-cleanup-more' 2018-11-03 00:53:57 +09:00
merge-recursive.h Merge branch 'en/directory-renames-nothanks' 2018-09-04 14:31:38 -07:00
merge.c merge.c: remove implicit dependency on the_index 2018-09-21 09:48:10 -07:00
mergesort.c
mergesort.h mergesort: rename it to llist_mergesort() 2012-04-17 11:07:01 -07:00
midx.c multi-pack-index: avoid dead store for struct progress 2018-10-19 11:16:53 +09:00
midx.h headers: normalize the spelling of some header guards 2018-10-18 13:39:35 +09:00
name-hash.c trace.h: support nested performance tracing 2018-08-18 09:47:46 -07:00
notes-cache.c commit: add repository argument to lookup_commit_reference_gently 2018-06-29 10:43:39 -07:00
notes-cache.h
notes-merge.c Merge branch 'nd/the-index' 2018-10-19 13:34:02 +09:00
notes-merge.h Add missing includes and forward declarations 2018-08-15 11:52:09 -07:00
notes-utils.c commit: add repository argument to lookup_commit 2018-06-29 10:43:39 -07:00
notes-utils.h Add missing includes and forward declarations 2018-08-15 11:52:09 -07:00
notes.c convert "oidcmp() != 0" to "!oideq()" 2018-08-29 11:32:49 -07:00
notes.h Add missing includes and forward declarations 2018-08-15 11:52:09 -07:00
object-store.h sha1-file: use loose object cache for quick existence check 2018-11-13 14:22:03 +09:00
object.c sha1-file: use an object_directory for the main object dir 2018-11-13 14:22:03 +09:00
object.h Merge branch 'ds/reachable' 2018-09-17 13:53:52 -07:00
oidmap.c convert hashmap comparison functions to oideq() 2018-08-29 11:32:49 -07:00
oidmap.h Add missing includes and forward declarations 2018-08-15 11:52:09 -07:00
oidset.c oidset: uninline oidset_init() 2018-10-04 11:12:14 -07:00
oidset.h oidset: uninline oidset_init() 2018-10-04 11:12:14 -07:00
pack-bitmap-write.c Merge branch 'bc/hash-transition-part-15' 2018-10-30 15:43:42 +09:00
pack-bitmap.c Merge branch 'jk/pack-objects-with-bitmap-fix' 2018-09-17 13:53:58 -07:00
pack-bitmap.h bitmap_has_sha1_in_uninteresting(): drop BUG check 2018-09-04 08:30:48 -07:00
pack-check.c convert "hashcmp() != 0" to "!hasheq()" 2018-08-29 11:32:49 -07:00
pack-objects.c Merge branch 'js/pack-objects-mutex-init-fix' 2018-10-30 15:43:43 +09:00
pack-objects.h Merge branch 'js/pack-objects-mutex-init-fix' 2018-10-30 15:43:43 +09:00
pack-revindex.c pack-revindex: express constants in terms of the_hash_algo 2018-10-15 12:53:15 +09:00
pack-revindex.h
pack-write.c convert "hashcmp() != 0" to "!hasheq()" 2018-08-29 11:32:49 -07:00
pack.h csum-file: rename sha1file to hashfile 2018-02-02 11:28:41 -08:00
packfile.c object-store: provide helpers for loose_objects_cache 2018-11-13 14:22:03 +09:00
packfile.h fuzz: add fuzz testing for packfile indices. 2018-10-15 14:29:03 +09:00
pager.c Merge branch 'nd/command-list' 2018-06-01 15:06:37 +09:00
parse-options-cb.c commit: add repository argument to lookup_commit_reference 2018-06-29 10:43:39 -07:00
parse-options.c Merge branch 'rs/parse-opt-lithelp' 2018-08-17 13:09:56 -07:00
parse-options.h Merge branch 'ps/contains-id-error-message' 2018-04-10 16:28:20 +09:00
patch-delta.c patch-delta: handle truncated copy parameters 2018-08-30 10:30:23 -07:00
patch-ids.c Merge branch 'nd/the-index' 2018-10-19 13:34:02 +09:00
patch-ids.h patch-ids.c: remove implicit dependency on the_index 2018-09-21 09:48:11 -07:00
path.c sha1-file: use an object_directory for the main object dir 2018-11-13 14:22:03 +09:00
path.h Add missing includes and forward declarations 2018-08-15 11:52:09 -07:00
pathspec.c pathspec.c: use the right index instead of the_index 2018-08-13 14:14:43 -07:00
pathspec.h Add missing includes and forward declarations 2018-08-15 11:52:09 -07:00
pkt-line.c pkt-line.c: mark more strings for translation 2018-07-23 11:19:10 -07:00
pkt-line.h pkt-line: add packet_buf_write_len function 2018-03-15 12:01:09 -07:00
preload-index.c Merge branch 'nd/status-refresh-progress' 2018-10-19 13:34:03 +09:00
pretty.c Merge branch 'mg/gpg-fingerprint' 2018-11-03 00:53:58 +09:00
pretty.h Add missing includes and forward declarations 2018-08-15 11:52:09 -07:00
prio-queue.c Replace all die("BUG: ...") calls by BUG() ones 2018-05-06 19:06:13 +09:00
prio-queue.h
progress.c Merge branch 'en/rename-progress' 2017-12-19 11:33:55 -08:00
progress.h progress: fix progress meters when dealing with lots of work 2017-11-15 13:11:25 +09:00
prompt.c
prompt.h
protocol.c protocol: introduce enum protocol_version value protocol_v2 2018-03-14 14:15:07 -07:00
protocol.h protocol: introduce enum protocol_version value protocol_v2 2018-03-14 14:15:07 -07:00
quote.c Merge branch 'jk/sq-dequote-on-bogus-input' 2018-02-27 10:34:02 -08:00
quote.h trace: avoid unnecessary quoting 2018-01-16 12:16:54 -08:00
range-diff.c range-diff: allow to diff files regardless of submodule config 2018-10-25 14:47:53 +09:00
range-diff.h range-diff: relieve callers of low-level configuration burden 2018-08-14 14:27:04 -07:00
reachable.c tree: add repository argument to lookup_tree 2018-06-29 10:43:38 -07:00
reachable.h Add missing includes and forward declarations 2018-08-15 11:52:09 -07:00
read-cache.c Merge branch 'nd/unpack-trees-with-cache-tree' 2018-11-06 15:50:20 +09:00
README.md note git-security@googlegroups.com in more places 2018-06-01 09:24:11 +09:00
rebase-interactive.c rebase -i: introduce the 'break' command 2018-10-12 23:03:04 +09:00
rebase-interactive.h rebase -i: remove unused modes and functions 2018-08-29 13:38:18 -07:00
ref-filter.c Merge branch 'ot/ref-filter-plug-leaks' 2018-10-30 15:43:45 +09:00
ref-filter.h Merge branch 'ot/libify-get-ref-atom-value' 2018-05-08 15:59:18 +09:00
reflog-walk.c Merge branch 'nd/i18n' 2018-08-15 15:08:23 -07:00
reflog-walk.h Add missing includes and forward declarations 2018-08-15 11:52:09 -07:00
refs.c Merge branch 'ds/commit-graph-with-grafts' 2018-10-16 16:15:59 +09:00
refs.h Merge branch 'ds/commit-graph-with-grafts' 2018-10-16 16:15:59 +09:00
refspec.c refspec.c: mark more strings for translation 2018-07-23 11:19:10 -07:00
refspec.h refspec: add back a refspec_item_init() function 2018-06-11 10:11:31 -07:00
RelNotes Declare that the next one will be named 2.20 2018-10-10 09:20:03 +09:00
remote-curl.c Merge branch 'en/double-semicolon-fix' 2018-09-24 10:30:47 -07:00
remote-testsvn.c Merge branch 'sb/object-store-grafts' 2018-07-18 12:20:28 -07:00
remote.c Merge branch 'nd/the-index' 2018-10-19 13:34:02 +09:00
remote.h Merge branch 'ds/reachable' 2018-09-17 13:53:52 -07:00
replace-object.c Merge branch 'ds/commit-graph-with-grafts' 2018-10-16 16:15:59 +09:00
replace-object.h commit-graph: not compatible with replace objects 2018-08-21 10:22:51 -07:00
repository.c sha1-file: use an object_directory for the main object dir 2018-11-13 14:22:03 +09:00
repository.h Merge branch 'en/incl-forward-decl' 2018-08-20 12:41:32 -07:00
rerere.c Merge branch 'bc/hash-transition-part-15' 2018-10-30 15:43:42 +09:00
rerere.h rerere.c: remove implicit dependency on the_index 2018-09-21 09:48:11 -07:00
resolve-undo.c resolve-undo.c: use the right index instead of the_index 2018-08-13 14:14:44 -07:00
resolve-undo.h Add missing includes and forward declarations 2018-08-15 11:52:09 -07:00
revision.c Merge branch 'md/exclude-promisor-objects-fix' 2018-11-06 15:50:21 +09:00
revision.h Merge branch 'md/exclude-promisor-objects-fix' 2018-11-06 15:50:21 +09:00
run-command.c t0061: adjust to test-tool transition 2018-10-25 11:41:09 +09:00
run-command.h
send-pack.c shallow: add repository argument to is_repository_shallow 2018-05-18 08:13:10 +09:00
send-pack.h Add missing includes and forward declarations 2018-08-15 11:52:09 -07:00
sequencer.c Merge branch 'js/rebase-i-shortopt' 2018-11-02 11:04:59 +09:00
sequencer.h Merge branch 'ag/rebase-i-in-c' 2018-11-02 11:04:53 +09:00
serve.c serve: introduce the server-option capability 2018-04-24 11:24:40 +09:00
serve.h serve: introduce git-serve 2018-03-15 12:01:08 -07:00
server-info.c treewide: use get_all_packs 2018-08-20 15:31:40 -07:00
setup.c Replace all die("BUG: ...") calls by BUG() ones 2018-05-06 19:06:13 +09:00
sh-i18n--envsubst.c Replace Free Software Foundation address in license notices 2017-11-09 13:21:21 +09:00
sha1-array.c convert "oidcmp() == 0" to oideq() 2018-08-29 11:32:49 -07:00
sha1-array.h get_short_oid: sort ambiguous objects by type, then SHA-1 2018-05-11 14:43:23 +09:00
sha1-file.c sha1-file: use loose object cache for quick existence check 2018-11-13 14:22:03 +09:00
sha1-lookup.c Replace all die("BUG: ...") calls by BUG() ones 2018-05-06 19:06:13 +09:00
sha1-lookup.h packfile: refactor hash search with fanout table 2018-02-15 13:08:55 -08:00
sha1-name.c object-store: provide helpers for loose_objects_cache 2018-11-13 14:22:03 +09:00
sha1dc_git.c sha1dc: allow building with the external sha1dc library 2017-08-16 14:44:25 -07:00
sha1dc_git.h sha1dc_git.h: re-arrange an ifdef chain for a subsequent change 2017-12-08 15:01:01 -08:00
shallow.c Merge branch 'js/shallow-and-fetch-prune' 2018-11-06 15:50:18 +09:00
shell.c Merge branch 'nd/command-list' 2018-06-01 15:06:37 +09:00
shortlog.h Add missing includes and forward declarations 2018-08-15 11:52:09 -07:00
sideband.c sideband: do not read beyond the end of input 2018-08-18 09:16:48 -07:00
sideband.h
sigchain.c Replace all die("BUG: ...") calls by BUG() ones 2018-05-06 19:06:13 +09:00
sigchain.h
split-index.c split-index: BUG() when cache entry refers to non-existing shared entry 2018-10-12 07:23:29 +09:00
split-index.h split-index: convert struct split_index to object_id 2018-05-02 13:59:50 +09:00
strbuf.c Merge branch 'pk/rebase-in-c-3-acts' 2018-11-02 11:04:54 +09:00
strbuf.h Merge branch 'pk/rebase-in-c-3-acts' 2018-11-02 11:04:54 +09:00
streaming.c cache.h: add repository argument to oid_object_info_extended 2018-04-26 10:54:27 +09:00
streaming.h streaming: convert open_istream to use struct object_id 2018-03-14 09:23:49 -07:00
string-list.c Merge branch 'sb/string-list-remove-unused' 2018-09-24 10:30:50 -07:00
string-list.h string-list: remove unused function print_string_list 2018-09-11 12:27:58 -07:00
sub-process.c Merge branch 'cc/subprocess-handshake-missing-capabilities' into maint 2017-10-18 14:19:10 +09:00
sub-process.h Docs: split out long-running subprocess handshake 2018-01-25 11:24:32 -08:00
submodule-config.c Sync with 2.19.1 2018-09-27 11:53:39 -07:00
submodule-config.h submodule-config: make 'config_from_gitmodules' private 2018-06-26 12:56:12 -07:00
submodule.c submodule.c: remove some of the_repository references 2018-10-22 11:55:33 +09:00
submodule.h submodule.c: remove some of the_repository references 2018-10-22 11:55:33 +09:00
symlinks.c
tag.c tag: express constant in terms of the_hash_algo 2018-10-15 12:53:16 +09:00
tag.h tag.c: allow deref_tag to handle arbitrary repositories 2018-06-29 10:43:40 -07:00
tar.h
tempfile.c reopen_tempfile(): truncate opened file 2018-09-05 09:46:16 -07:00
tempfile.h Merge branch 'jk/reopen-tempfile-truncate' 2018-09-24 10:30:46 -07:00
thread-utils.c
thread-utils.h
tmp-objdir.c Replace all die("BUG: ...") calls by BUG() ones 2018-05-06 19:06:13 +09:00
tmp-objdir.h
trace.c trace.h: support nested performance tracing 2018-08-18 09:47:46 -07:00
trace.h trace.h: support nested performance tracing 2018-08-18 09:47:46 -07:00
trailer.c interpret-trailers: allow suppressing "---" divider 2018-08-23 10:08:51 -07:00
trailer.h Merge branch 'jk/trailer-fixes' 2018-09-17 13:53:54 -07:00
transport-helper.c transport: list refs before fetch if necessary 2018-10-07 09:53:19 +09:00
transport-internal.h transport: list refs before fetch if necessary 2018-10-07 09:53:19 +09:00
transport.c rename "alternate_object_database" to "object_directory" 2018-11-13 14:22:02 +09:00
transport.h transport: drop refnames from for_each_alternate_ref 2018-10-09 14:30:02 +09:00
tree-diff.c Merge branch 'nd/the-index' 2018-10-19 13:34:02 +09:00
tree-walk.c Merge branch 'bc/object-id' 2018-08-02 15:30:39 -07:00
tree-walk.h Add missing includes and forward declarations 2018-08-15 11:52:09 -07:00
tree.c Merge branch 'jm/cache-entry-from-mem-pool' 2018-08-02 15:30:43 -07:00
tree.h tree: allow lookup_tree to handle arbitrary repositories 2018-06-29 10:43:39 -07:00
unicode-width.h unicode: update the width tables to Unicode 11 2018-07-09 14:02:51 -07:00
unimplemented.sh
unix-socket.c
unix-socket.h
unpack-trees.c unpack-trees: avoid dead store for struct progress 2018-10-19 11:16:52 +09:00
unpack-trees.h Merge branch 'nd/clone-case-smashing-warning' 2018-09-17 13:53:47 -07:00
upload-pack.c Merge branch 'jt/upload-pack-v2-fix-shallow' 2018-11-06 15:50:19 +09:00
upload-pack.h fetch-pack: perform a fetch using v2 2018-03-15 12:01:08 -07:00
url.c
url.h Add missing includes and forward declarations 2018-08-15 11:52:09 -07:00
urlmatch.c
urlmatch.h urlmatch.h: fix include guard 2018-08-15 11:52:09 -07:00
usage.c Merge branch 'jk/snprintf-truncation' 2018-05-30 21:51:28 +09:00
userdiff.c Merge branch 'nd/the-index' 2018-10-19 13:34:02 +09:00
userdiff.h userdiff.c: remove implicit dependency on the_index 2018-09-21 09:50:58 -07:00
utf8.c Merge branch 'jk/size-t' 2018-08-15 15:08:25 -07:00
utf8.h Merge branch 'en/incl-forward-decl' 2018-08-20 12:41:32 -07:00
varint.c
varint.h
version.c version --build-options: report commit, too, if possible 2017-12-14 22:53:04 -08:00
version.h version --build-options: report commit, too, if possible 2017-12-14 22:53:04 -08:00
versioncmp.c
walker.c Merge branch 'sb/object-store-grafts' 2018-07-18 12:20:28 -07:00
walker.h walker: drop fields of struct walker which are always 1 2018-04-24 10:55:04 +09:00
wildmatch.c
wildmatch.h
worktree.c worktree: don't die() in library function find_worktree() 2018-08-30 09:28:02 -07:00
worktree.h Add missing includes and forward declarations 2018-08-15 11:52:09 -07:00
wrap-for-bin.sh Make running git under other debugger-like programs easy 2018-04-25 10:47:22 +09:00
wrapper.c Replace all die("BUG: ...") calls by BUG() ones 2018-05-06 19:06:13 +09:00
write-or-die.c write_or_die.c: rename to use dashes in file name 2018-04-11 18:11:00 +09:00
ws.c Merge branch 'nd/the-index' 2018-10-19 13:34:02 +09:00
wt-status.c Merge branch 'ss/wt-status-committable' 2018-10-19 13:34:02 +09:00
wt-status.h roll wt_status_state into wt_status and populate in the collect phase 2018-10-03 23:38:20 -07:00
xdiff-interface.c convert "oidcmp() == 0" to oideq() 2018-08-29 11:32:49 -07:00
xdiff-interface.h xdiff-interface: export comparing and hashing strings 2017-10-26 11:23:22 +09:00
zlib.c Replace all die("BUG: ...") calls by BUG() ones 2018-05-06 19:06:13 +09:00

README.md

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-.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://public-inbox.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