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Jeff King fcc07e980b is_promisor_object(): free tree buffer after parsing 
To get the list of all promisor objects, we not only include all objects
in promisor packs, but also parse each of those objects to see which
objects they reference. After parsing a tree object, the tree->buffer
field will remain populated until we explicitly free it. So in a partial
clone of blob:none, for example, we are essentially reading every tree
in the repository (since they're all in the initial promisor pack), and
keeping all of their uncompressed contents in memory at once.

This patch frees the tree buffers after we've finished marking all of
their reachable objects. We shouldn't need to do this for any other
object type. While we are using some extra memory to store the structs,
no other object type stores the whole contents in its parsed form (we do
sometimes hold on to commit buffers, but less so these days due to
commit graphs, plus most commands which care about promisor objects turn
off the save_commit_buffer global).

Even for a moderate-sized repository like git.git, this patch drops the
peak heap (as measured by massif) for git-fsck from ~1.7GB to ~138MB.
Fsck is a good candidate for measuring here because it doesn't interact
with the promisor code except to call is_promisor_object(), so we can
isolate just this problem.

The added perf test shows only a tiny improvement on my machine for
git.git, since 1.7GB isn't enough to cause any real memory pressure:

  Test                                 HEAD^               HEAD
  --------------------------------------------------------------------------------
  5600.4: fsck                         21.26(20.90+0.35)   20.84(20.79+0.04) -2.0%

With linux.git the absolute change is a bit bigger, though still a small
percentage:

  Test                          HEAD^                 HEAD
  -----------------------------------------------------------------------------
  5600.4: fsck                  262.26(259.13+3.12)   254.92(254.62+0.29) -2.8%

I didn't have the patience to run it under massif with linux.git, but
it's probably on the order of about 14GB improvement, since that's the
sum of the sizes of all of the uncompressed trees (but still isn't
enough to create memory pressure on this particular machine, which has
64GB of RAM). Smaller machines would probably see a bigger effect on
runtime (and sadly our perf suite does not measure peak heap).

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
 		2021-04-13 13:16:39 -07:00
.github cmake(install): include vcpkg dlls 2021-03-29 13:49:04 -07:00
Documentation The eighth batch 2021-04-08 13:23:26 -07:00
block-sha1 block-sha1: drop trailing semicolon from macro definition 2021-03-17 10:20:01 -07:00
builtin Merge branch 'en/sequencer-edit-upon-conflict-fix' 2021-04-08 13:23:26 -07:00
ci Merge branch 'tb/pack-revindex-on-disk' 2021-02-12 14:21:04 -08:00
compat Merge branch 'jh/simple-ipc' 2021-04-02 14:43:14 -07:00
contrib Merge branch 'js/cmake-vsbuild' 2021-04-07 16:54:08 -07:00
ewah use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
git-gui Merge https://github.com/prati0100/git-gui 2021-03-04 12:38:50 -08:00
gitk-git Merge remote-tracking branch 'paulus/master' into pm/gitk-update 2020-10-03 10:06:27 -07:00
gitweb gitweb/Makefile: conditionally include ../GIT-VERSION-FILE 2020-12-08 16:56:56 -08:00
mergetools mergetools/vimdiff: add vimdiff1 merge tool variant 2021-02-23 11:37:13 -08:00
negotiator use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
perl git-send-email: Respect core.hooksPath setting 2021-03-23 15:02:52 -07:00
po l10n: zh_CN: for git v2.31.0 l10n round 1 and 2 2021-03-15 00:05:25 +08:00
ppc
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refs use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
sha1collisiondetection@855827c583
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sha1dc
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sha256
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t is_promisor_object(): free tree buffer after parsing 2021-04-13 13:16:39 -07:00
templates hook: add sample template for push-to-checkout 2020-10-16 08:47:02 -07:00
trace2
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xdiff diff: add -I<regex> that ignores matching changes 2020-10-20 12:53:26 -07:00
.cirrus.yml
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.clang-format
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.editorconfig
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.gitattributes CoC: explicitly take any whitespace breakage 2021-01-04 09:44:49 -08:00
.gitignore Merge branch 'fc/random-cleanup' 2020-12-08 15:11:21 -08:00
.gitmodules
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.mailmap Add entry for Ramkumar Ramachandra 2021-03-08 09:56:34 -08:00
.travis.yml ci: remove GETTEXT_POISON jobs 2021-01-21 15:50:00 -08:00
.tsan-suppressions
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CODE_OF_CONDUCT.md CoC: update to version 2.0 + local changes 2021-01-13 17:45:04 -08:00
COPYING
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GIT-VERSION-GEN Git 2.31.1 2021-03-26 14:49:41 -07:00
INSTALL INSTALL: note on using Asciidoctor to build doc 2021-03-19 10:49:20 -07:00
LGPL-2.1
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Makefile Merge branch 'ab/make-tags-quiet' 2021-04-08 13:23:26 -07:00
README.md
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RelNotes Git 2.31.1 2021-03-26 14:49:41 -07:00
SECURITY.md SECURITY: describe how to report vulnerabilities 2021-03-27 15:13:02 -07:00
abspath.c abspath: add a function to resolve paths with missing components 2020-12-12 23:35:47 -08:00
aclocal.m4
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add-interactive.c Merge branch 'rs/xcalloc-takes-nelem-first' 2021-03-19 15:25:39 -07:00
add-interactive.h
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add-patch.c Merge branch 'js/add-i-color-fix' 2020-12-08 15:11:17 -08:00
advice.c push: parse and set flag for "--force-if-includes" 2020-10-03 09:59:19 -07:00
advice.h push: parse and set flag for "--force-if-includes" 2020-10-03 09:59:19 -07:00
alias.c
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alias.h
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alloc.c
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alloc.h
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apply.c Merge branch 'mt/parallel-checkout-part-1' 2021-04-02 14:43:14 -07:00
apply.h
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archive-tar.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
archive-zip.c archive: read short blobs in archive.c::write_archive_entry() 2020-09-19 15:56:05 -07:00
archive.c Merge branch 'ab/read-tree' 2021-03-30 14:35:37 -07:00
archive.h archive: expand only a single %(describe) per archive 2021-03-11 13:22:44 -08:00
attr.c Merge branch 'jk/open-dotgitx-with-nofollow' 2021-03-22 14:00:22 -07:00
attr.h
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banned.h banned.h: mark ctime_r() and asctime_r() as banned 2020-12-02 14:30:39 -08:00
base85.c
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bisect.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
bisect.h bisect: combine args passed to find_bisection() 2020-08-07 15:13:03 -07:00
blame.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
blame.h blame: simplify 'setup_blame_bloom_data' interface 2020-11-01 15:54:15 -08:00
blob.c
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blob.h
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bloom.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
bloom.h bloom: encode out-of-bounds filters as non-empty 2020-09-17 21:55:50 -07:00
branch.c wt-status: tolerate dangling marks 2020-09-02 14:39:25 -07:00
branch.h
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builtin.h Merge branch 'ds/maintenance-part-3' 2020-11-18 13:32:53 -08:00
bulk-checkin.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
bulk-checkin.h
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bundle.c bundle: arguments can be read from stdin 2021-01-11 21:50:41 -08:00
bundle.h Merge branch 'bc/sha-256-part-3' 2020-08-11 18:04:11 -07:00
cache-tree.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
cache-tree.h cache-tree: extract subtree_pos() 2021-01-23 17:14:07 -08:00
cache.h Merge branch 'mt/parallel-checkout-part-1' 2021-04-02 14:43:14 -07:00
chdir-notify.c
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chdir-notify.h
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check-builtins.sh
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check_bindir
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checkout.c config: drop git_config_get_string_const() 2020-08-17 15:35:47 -07:00
checkout.h
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chunk-format.c chunk-format: restore duplicate chunk checks 2021-02-18 13:38:16 -08:00
chunk-format.h chunk-format: create read chunk API 2021-02-18 13:38:16 -08:00
color.c
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color.h
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column.c Merge branch 'jk/strvec' 2020-08-10 10:23:57 -07:00
column.h
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combine-diff.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
command-list.txt mailmap doc: create a new "gitmailmap(5)" man page 2021-01-12 14:04:39 -08:00
commit-graph.c Merge branch 'ds/commit-graph-generation-config' 2021-03-22 14:00:23 -07:00
commit-graph.h commit-graph: use config to specify generation type 2021-02-25 15:10:41 -08:00
commit-reach.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
commit-reach.h commit-graph: return 64-bit generation number 2021-01-18 16:21:18 -08:00
commit-slab-decl.h
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commit-slab-impl.h
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commit-slab.h
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commit.c Merge branch 'cm/rebase-i-fixup-amend-reword' 2021-03-26 14:59:03 -07:00
commit.h Merge branch 'cm/rebase-i-fixup-amend-reword' 2021-03-26 14:59:03 -07:00
common-main.c
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config.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
config.h Merge branch 'ps/config-env-pairs' 2021-01-25 14:19:19 -08:00
config.mak.dev Merge branch 'jc/sparse-error-for-developer-build' 2020-11-18 13:32:54 -08:00
config.mak.in
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config.mak.uname Merge branch 'jh/simple-ipc' 2021-04-02 14:43:14 -07:00
configure.ac Remove support for v1 of the PCRE library 2021-01-23 21:15:43 -08:00
connect.c Merge branch 'jt/clone-unborn-head' 2021-02-17 17:21:40 -08:00
connect.h
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connected.c Merge branch 'rs/more-buffered-io' 2020-08-24 14:54:31 -07:00
connected.h
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convert.c Merge branch 'jh/simple-ipc' 2021-04-02 14:43:14 -07:00
convert.h convert: add classification for conv_attrs struct 2021-03-18 13:56:40 -07:00
copy.c
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credential.c credential: treat CR/LF as line endings in the credential protocol 2020-10-03 10:41:03 -07:00
credential.h
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csum-file.c csum-file: make hashwrite() more readable 2021-03-26 14:32:45 -07:00
csum-file.h csum-file: add hashwrite_be64() 2020-11-12 09:40:06 -08:00
ctype.c
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daemon.c Merge branch 'rs/daemon-sanitize-dir-sep' 2021-04-08 13:23:26 -07:00
date.c
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decorate.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
decorate.h
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delta-islands.c
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delta-islands.h
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delta.h
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detect-compiler
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diff-delta.c
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diff-lib.c fsmonitor: add assertion that fsmonitor is valid to check_removed 2021-03-18 13:31:13 -07:00
diff-merges.c diff-merges: add '--diff-merges=1' as synonym for 'first-parent' 2020-12-21 13:47:32 -08:00
diff-merges.h diff-merges: get rid of now empty diff_merges_init_revs() 2020-12-21 13:47:31 -08:00
diff-no-index.c
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diff.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
diff.h Merge branch 'jc/diffcore-rotate' 2021-02-25 16:43:30 -08:00
diffcore-break.c
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diffcore-delta.c
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diffcore-order.c
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diffcore-pickaxe.c
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diffcore-rename.c Merge branch 'en/ort-perf-batch-9' 2021-04-08 13:23:26 -07:00
diffcore-rotate.c diff: --{rotate,skip}-to=<path> 2021-02-16 09:30:42 -08:00
diffcore.h Merge branch 'en/ort-perf-batch-9' 2021-04-08 13:23:26 -07:00
dir-iterator.c
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dir-iterator.h
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dir.c Merge branch 'jk/open-dotgitx-with-nofollow' 2021-03-22 14:00:22 -07:00
dir.h exclude: add flags parameter to add_patterns() 2021-02-16 09:41:33 -08:00
editor.c config: fix leaks from git_config_get_string_const() 2020-08-14 10:52:04 -07:00
entry.c Merge branch 'mt/parallel-checkout-part-1' 2021-04-02 14:43:14 -07:00
entry.h entry: add checkout_entry_ca() taking preloaded conv_attrs 2021-03-23 10:34:05 -07:00
environment.c config: allow specifying config entries via envvar pairs 2021-01-15 13:03:45 -08:00
environment.h environment: make `getenv_safe()` a public function 2021-01-15 13:03:45 -08:00
exec-cmd.c strvec: rename struct fields 2020-07-30 19:18:06 -07:00
exec-cmd.h
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fetch-negotiator.c negotiator/noop: add noop fetch negotiator 2020-08-18 13:25:05 -07:00
fetch-negotiator.h
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fetch-pack.c Merge branch 'll/clone-reject-shallow' 2021-04-08 13:23:25 -07:00
fetch-pack.h builtin/clone.c: add --reject-shallow option 2021-04-01 12:58:58 -07:00
fmt-merge-msg.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
fmt-merge-msg.h
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fsck.c fetch-pack: use new fsck API to printing dangling submodules 2021-03-28 19:03:10 -07:00
fsck.h fetch-pack: use new fsck API to printing dangling submodules 2021-03-28 19:03:10 -07:00
fsmonitor.c Merge branch 'jh/fsmonitor-prework' 2021-03-19 15:25:37 -07:00
fsmonitor.h fsmonitor: add assertion that fsmonitor is valid to check_removed 2021-03-18 13:31:13 -07:00
fuzz-commit-graph.c commit-graph: pass a 'struct repository *' in more places 2020-09-09 12:51:48 -07:00
fuzz-pack-headers.c
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fuzz-pack-idx.c
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generate-cmdlist.sh Fit to Plan 9's ANSI/POSIX compatibility layer 2020-09-09 22:31:31 -07:00
generate-configlist.sh
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gettext.c Merge branch 'ab/detox-gettext-tests' 2021-02-10 14:48:33 -08:00
gettext.h tests: remove support for GIT_TEST_GETTEXT_POISON 2021-01-21 15:50:01 -08:00
git-add--interactive.perl Merge branch 'js/add-i-color-fix' 2020-12-08 15:11:17 -08:00
git-archimport.perl
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git-bisect.sh bisect--helper: reimplement `bisect_skip` shell function in C 2021-02-03 14:52:09 -08:00
git-compat-util.h Merge branch 'jk/open-dotgitx-with-nofollow' 2021-03-22 14:00:22 -07:00
git-cvsexportcommit.perl cvsexportcommit: do not run git programs in dashed form 2020-08-26 14:49:52 -07:00
git-cvsimport.perl
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git-cvsserver.perl
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git-difftool--helper.sh mergetool: break setup_tool out into separate initialization function 2021-02-09 14:09:16 -08:00
git-filter-branch.sh filter-branch: drop $_x40 glob 2021-03-10 14:16:58 -08:00
git-instaweb.sh
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git-merge-octopus.sh
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git-merge-one-file.sh
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git-merge-resolve.sh
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git-mergetool--lib.sh Merge branch 'sh/mergetool-hideresolved' 2021-02-17 17:21:41 -08:00
git-mergetool.sh mergetool: do not enable hideResolved by default 2021-03-13 15:30:29 -08:00
git-p4.py Merge branch 'dl/p4-encode-after-kw-expansion' into maint 2021-02-08 14:05:54 -08:00
git-quiltimport.sh
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git-rebase--preserve-merges.sh rebase: remove unused function reschedule_last_action 2020-08-12 12:25:42 -07:00
git-request-pull.sh
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git-send-email.perl git-send-email: Respect core.hooksPath setting 2021-03-23 15:02:52 -07:00
git-sh-i18n.sh tests: remove support for GIT_TEST_GETTEXT_POISON 2021-01-21 15:50:01 -08:00
git-sh-setup.sh
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git-submodule.sh submodule: fix fetch_in_submodule logic 2020-11-24 13:14:09 -08:00
git-svn.perl perl: check for perl warnings while running tests 2020-10-21 23:11:48 -07:00
git-web--browse.sh
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git.c Merge branch 'tb/precompose-prefix-too' 2021-02-12 14:21:04 -08:00
git.rc
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gpg-interface.c gpg-interface: remove other signature headers before verifying 2021-02-10 23:35:42 -08:00
gpg-interface.h gpg-interface: improve interface for parsing tags 2021-02-10 23:35:42 -08:00
graph.c strvec: rename struct fields 2020-07-30 19:18:06 -07:00
graph.h
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grep.c Merge branch 'ab/grep-pcre2-allocfix' 2021-03-22 14:00:23 -07:00
grep.h grep/pcre2: move back to thread-only PCREv2 structures 2021-02-17 16:32:19 -08:00
hash-lookup.c oid_pos(): access table through const pointers 2021-01-28 12:03:26 -08:00
hash-lookup.h oid_pos(): access table through const pointers 2021-01-28 12:03:26 -08:00
hash.h cache.h: move hash/oid functions to hash.h 2020-12-04 13:55:14 -08:00
hashmap.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
hashmap.h hashmap: provide deallocation function names 2020-11-02 12:15:50 -08:00
help.c help.c: help.autocorrect=never means "do not compute suggestions" 2020-11-25 13:02:15 -08:00
help.h help: do not expect built-in commands to be hardlinked 2020-10-07 15:25:10 -07:00
hex.c
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http-backend.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
http-fetch.c http-fetch: allow custom index-pack args 2021-02-22 12:07:40 -08:00
http-push.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
http-walker.c
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http.c Merge branch 'cs/http-use-basic-after-failed-negotiate' 2021-03-30 14:35:37 -07:00
http.h http: allow custom index-pack args 2021-02-22 12:07:40 -08:00
ident.c Merge branch 'pw/rebase-i-more-options' 2020-09-03 12:37:01 -07:00
imap-send.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
iterator.h
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json-writer.c
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json-writer.h
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khash.h
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kwset.c
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kwset.h
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levenshtein.c
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levenshtein.h
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line-log.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
line-log.h
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line-range.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
line-range.h
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linear-assignment.c
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linear-assignment.h
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list-objects-filter-options.c list-objects-filter-options: fix function name in BUG 2020-11-16 14:28:25 -08:00
list-objects-filter-options.h list_objects_filter_options: introduce 'list_object_filter_config_name' 2020-08-03 18:03:24 -07:00
list-objects-filter.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
list-objects-filter.h
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list-objects.c
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list-objects.h
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list.h
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ll-merge.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
ll-merge.h
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lockfile.c
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lockfile.h
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log-tree.c format-patch: allow a non-integral version numbers 2021-03-23 12:49:47 -07:00
log-tree.h format-patch: make output filename configurable 2020-11-09 17:44:41 -08:00
ls-refs.c Merge branch 'jt/clone-unborn-head' 2021-02-17 17:21:40 -08:00
ls-refs.h ls-refs: report unborn targets of symrefs 2021-02-05 13:49:53 -08:00
mailinfo.c
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mailinfo.h
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mailmap.c Merge branch 'jk/open-dotgitx-with-nofollow' 2021-03-22 14:00:22 -07:00
mailmap.h shortlog: remove unused(?) "repo-abbrev" feature 2021-01-12 14:04:42 -08:00
match-trees.c
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mem-pool.c mem-pool: drop trailing semicolon from macro definition 2021-03-17 10:20:16 -07:00
mem-pool.h mem-pool: use consistent pool variable name 2020-08-18 12:16:08 -07:00
merge-blobs.c
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merge-blobs.h
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merge-ort-wrappers.c merge-ort-wrappers: new convience wrappers to mimic the old merge API 2020-10-26 22:36:14 -07:00
merge-ort-wrappers.h merge-ort-wrappers: new convience wrappers to mimic the old merge API 2020-10-26 22:36:14 -07:00
merge-ort.c Merge branch 'en/ort-perf-batch-9' 2021-04-08 13:23:26 -07:00
merge-ort.h merge-ort: implement merge_incore_recursive() 2020-12-16 21:56:39 -08:00
merge-recursive.c Merge branch 'ab/read-tree' 2021-03-30 14:35:37 -07:00
merge-recursive.h merge-recursive: fix unclear and outright wrong comments 2020-08-02 11:03:57 -07:00
merge.c dir: fix problematic API to avoid memory leaks 2020-08-18 17:17:31 -07:00
mergesort.c
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mergesort.h
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midx.c Merge branch 'tb/reverse-midx' 2021-04-08 13:23:25 -07:00
midx.h pack-revindex: write multi-pack reverse indexes 2021-04-01 13:07:37 -07:00
name-hash.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
notes-cache.c
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notes-cache.h
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notes-merge.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
notes-merge.h
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notes-utils.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
notes-utils.h
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notes.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
notes.h
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object-file.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
object-name.c object-name.c: rename from sha1-name.c 2021-01-04 13:01:55 -08:00
object-store.h packfile: add kept-pack cache for find_kept_pack_entry() 2021-02-22 23:30:52 -08:00
object.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
object.h object: allow clear_commit_marks_all to handle any repo 2020-10-31 10:46:34 -07:00
oid-array.c oid_pos(): access table through const pointers 2021-01-28 12:03:26 -08:00
oid-array.h oid-array: provide a for-loop iterator 2020-12-07 12:32:04 -08:00
oidmap.c hashmap: provide deallocation function names 2020-11-02 12:15:50 -08:00
oidmap.h
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oidset.c blame: silently ignore invalid ignore file objects 2020-11-10 13:05:06 -08:00
oidset.h blame: validate and peel the object names on the ignore list 2020-09-24 22:20:58 -07:00
pack-bitmap-write.c oid_pos(): access table through const pointers 2021-01-28 12:03:26 -08:00
pack-bitmap.c Merge branch 'ps/pack-bitmap-optim' 2021-04-07 16:54:09 -07:00
pack-bitmap.h rev-list: add --disk-usage option for calculating disk usage 2021-02-11 09:57:55 -08:00
pack-check.c fsck: correctly compute checksums on idx files larger than 4GB 2020-11-16 13:41:35 -08:00
pack-objects.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
pack-objects.h
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pack-revindex.c Merge branch 'tb/reverse-midx' 2021-04-08 13:23:25 -07:00
pack-revindex.h pack-revindex: read multi-pack reverse indexes 2021-04-01 13:07:37 -07:00
pack-write.c Merge branch 'tb/reverse-midx' 2021-04-08 13:23:25 -07:00
pack.h Merge branch 'tb/reverse-midx' 2021-04-08 13:23:25 -07:00
packfile.c is_promisor_object(): free tree buffer after parsing 2021-04-13 13:16:39 -07:00
packfile.h packfile: introduce 'find_kept_pack_entry()' 2021-02-22 23:30:52 -08:00
pager.c pager: refactor wait_for_pager() function 2021-02-01 21:15:58 -08:00
parse-options-cb.c assert PARSE_OPT_NONEG in parse-options callbacks 2020-09-30 12:53:47 -07:00
parse-options.c parse-options: don't leak alias help messages 2021-03-21 14:39:10 -07:00
parse-options.h parse-options: don't leak alias help messages 2021-03-21 14:39:10 -07:00
patch-delta.c
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patch-ids.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
patch-ids.h patch-ids: handle duplicate hashmap entries 2021-01-12 11:13:32 -08:00
path.c sequencer: treat REVERT_HEAD as a pseudo ref 2020-08-21 11:20:11 -07:00
path.h sequencer: treat REVERT_HEAD as a pseudo ref 2020-08-21 11:20:11 -07:00
pathspec.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
pathspec.h
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pkt-line.c pkt-line: add options argument to read_packetized_to_strbuf() 2021-03-15 14:32:50 -07:00
pkt-line.h pkt-line: add options argument to read_packetized_to_strbuf() 2021-03-15 14:32:50 -07:00
preload-index.c preload-index: log the number of lstat calls to trace2 2021-02-16 17:14:34 -08:00
pretty.c Merge branch 'rs/pretty-describe' 2021-03-22 14:00:24 -07:00
pretty.h Merge branch 'rs/pretty-describe' 2021-03-22 14:00:24 -07:00
prio-queue.c
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prio-queue.h
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progress.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
progress.h
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promisor-remote.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
promisor-remote.h promisor-remote: remove unused variable 2020-09-21 22:32:49 -07:00
prompt.c
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prompt.h
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protocol.c protocol: re-enable v2 protocol by default 2020-09-25 11:40:42 -07:00
protocol.h
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prune-packed.c
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prune-packed.h
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quote.c quote: make sq_dequote_step() a public function 2021-01-12 12:03:18 -08:00
quote.h quote: make sq_dequote_step() a public function 2021-01-12 12:03:18 -08:00
range-diff.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
range-diff.h Merge branch 'js/range-diff-one-side-only' 2021-02-17 17:21:41 -08:00
reachable.c
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reachable.h
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read-cache.c Merge branch 'rs/calloc-array' 2021-03-19 15:25:38 -07:00
rebase-interactive.c rebase -i: clarify and fix 'fixup -c' rebase-todo help 2021-02-10 13:58:19 -08:00
rebase-interactive.h
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rebase.c
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rebase.h
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ref-filter.c Merge branch 'rs/xcalloc-takes-nelem-first' 2021-03-19 15:25:39 -07:00
ref-filter.h branch: sort detached HEAD based on a flag 2021-01-07 15:13:21 -08:00
reflog-walk.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
reflog-walk.h
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refs.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
refs.h Merge branch 'tb/ls-refs-optim' 2021-02-05 16:40:45 -08:00
refspec.c Merge branch 'fc/atmark-in-refspec' 2020-12-14 10:21:36 -08:00
refspec.h Merge branch 'sb/clone-origin' 2020-10-27 15:09:50 -07:00
remote-curl.c push: parse and set flag for "--force-if-includes" 2020-10-03 09:59:19 -07:00
remote.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
remote.h Merge branch 'jt/clone-unborn-head' 2021-02-17 17:21:40 -08:00
replace-object.c
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replace-object.h
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repo-settings.c Merge branch 'ds/maintenance-part-2' 2020-10-27 15:09:47 -07:00
repository.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
repository.h Merge branch 'ds/maintenance-part-2' 2020-10-27 15:09:47 -07:00
rerere.c rerere: use strmap to store rerere directories 2021-01-28 11:26:20 -08:00
rerere.h
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reset.c
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reset.h
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resolve-undo.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
resolve-undo.h
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revision.c Merge branch 'tb/geometric-repack' 2021-03-24 14:36:27 -07:00
revision.h Merge branch 'zh/format-patch-fractional-reroll-count' 2021-04-02 14:43:14 -07:00
run-command.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
run-command.h run-command: document use_shell option 2021-01-22 14:21:32 -08:00
send-pack.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
send-pack.h
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sequencer.c Merge branch 'en/sequencer-edit-upon-conflict-fix' 2021-04-08 13:23:26 -07:00
sequencer.h sequencer: fix edit handling for cherry-pick and revert messages 2021-03-31 14:10:50 -07:00
serve.c ls-refs: report unborn targets of symrefs 2021-02-05 13:49:53 -08:00
serve.h
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server-info.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
setup.c Merge branch 'bc/sha-256-part-3' 2020-08-11 18:04:11 -07:00
sh-i18n--envsubst.c
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sha1dc_git.c
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sha1dc_git.h
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shallow.c commit_graft_pos(): take an oid instead of a bare hash 2021-01-28 11:21:07 -08:00
shallow.h
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shell.c
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shortlog.h shortlog: remove unused(?) "repo-abbrev" feature 2021-01-12 14:04:42 -08:00
sideband.c Merge branch 'jk/sideband-more-error-checking' 2020-11-09 14:06:29 -08:00
sideband.h sideband: diagnose more sideband anomalies 2020-10-29 09:23:29 -07:00
sigchain.c
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sigchain.h
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simple-ipc.h simple-ipc: add Unix domain socket implementation 2021-03-22 11:52:54 -07:00
split-index.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
split-index.h
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stable-qsort.c
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strbuf.c
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strbuf.h
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streaming.c
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streaming.h
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string-list.c
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string-list.h
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strmap.c strmap: take advantage of FLEXPTR_ALLOC_STR when relevant 2020-11-11 12:55:27 -08:00
strmap.h strmap: make callers of strmap_remove() to call it in void context 2020-12-15 15:30:44 -08:00
strvec.c strvec: rename struct fields 2020-07-30 19:18:06 -07:00
strvec.h strvec: rename struct fields 2020-07-30 19:18:06 -07:00
sub-process.c
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sub-process.h
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submodule-config.c hashmap: provide deallocation function names 2020-11-02 12:15:50 -08:00
submodule-config.h
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submodule.c Merge branch 'sj/untracked-files-in-submodule-directory-is-not-dirty' 2021-01-25 14:19:18 -08:00
submodule.h submodule: rename helper functions to avoid ambiguity 2020-08-12 14:12:58 -07:00
symlinks.c checkout: don't follow symlinks when removing entries 2021-03-18 12:58:10 -07:00
tag.c gpg-interface: improve interface for parsing tags 2021-02-10 23:35:42 -08:00
tag.h
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tar.h
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tempfile.c
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tempfile.h
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thread-utils.c
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thread-utils.h
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tmp-objdir.c packfile: prepare for the existence of '*.rev' files 2021-01-25 18:32:43 -08:00
tmp-objdir.h
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trace.c
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trace.h
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trace2.c trace2: add a public function for getting the SID 2020-11-11 18:26:52 -08:00
trace2.h trace2: add a public function for getting the SID 2020-11-11 18:26:52 -08:00
trailer.c Merge branch 'rs/xcalloc-takes-nelem-first' 2021-03-19 15:25:39 -07:00
trailer.h pretty format %(trailers): add a "key_value_separator" 2020-12-09 14:16:42 -08:00
transport-helper.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
transport-internal.h connect, transport: encapsulate arg in struct 2021-02-05 13:49:54 -08:00
transport.c Merge branch 'll/clone-reject-shallow' 2021-04-08 13:23:25 -07:00
transport.h builtin/clone.c: add --reject-shallow option 2021-04-01 12:58:58 -07:00
tree-diff.c bloom/diff: properly short-circuit on max_changes 2020-09-17 09:31:25 -07:00
tree-walk.c tree-walk: report recursion counts 2021-01-04 15:23:08 -08:00
tree-walk.h
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tree.c tree.h API: simplify read_tree_recursive() signature 2021-03-20 16:09:26 -07:00
tree.h tree.h API: simplify read_tree_recursive() signature 2021-03-20 16:09:26 -07:00
unicode-width.h
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unimplemented.sh
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unix-socket.c unix-socket: disallow chdir() when creating unix domain sockets 2021-03-15 14:32:51 -07:00
unix-socket.h unix-socket: disallow chdir() when creating unix domain sockets 2021-03-15 14:32:51 -07:00
unix-stream-server.c unix-stream-server: create unix domain socket under lock 2021-03-15 14:32:51 -07:00
unix-stream-server.h unix-stream-server: create unix domain socket under lock 2021-03-15 14:32:51 -07:00
unpack-trees.c Merge branch 'mt/parallel-checkout-part-1' 2021-04-02 14:43:14 -07:00
unpack-trees.h stash show: teach --include-untracked and --only-untracked 2021-03-05 14:31:26 -08:00
upload-pack.c Merge branch 'ak/corrected-commit-date' 2021-02-17 17:21:40 -08:00
upload-pack.h
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url.c
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url.h
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urlmatch.c
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urlmatch.h
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usage.c usage: trace2 BUG() invocations 2021-02-09 14:14:34 -08:00
userdiff.c Merge branch 've/userdiff-bash' 2020-11-02 13:17:46 -08:00
userdiff.h
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utf8.c
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utf8.h
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varint.c
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varint.h
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version.c
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version.h
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versioncmp.c
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walker.c
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walker.h
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wildmatch.c
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wildmatch.h
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worktree.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
worktree.h worktree: teach worktree to lazy-load "prunable" reason 2021-01-30 09:57:16 -08:00
wrap-for-bin.sh
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wrapper.c add open_nofollow() helper 2021-02-16 09:41:32 -08:00
write-or-die.c
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ws.c
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wt-status.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
wt-status.h branch: sort detached HEAD based on a flag 2021-01-07 15:13:21 -08:00
xdiff-interface.c
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xdiff-interface.h
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zlib.c
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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