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Matheus Tavares 1d1729caeb grep: replace grep_read_mutex by internal obj read lock
git-grep uses 'grep_read_mutex' to protect its calls to object reading
operations. But these have their own internal lock now, which ensures a
better performance (allowing parallel access to more regions). So, let's
remove the former and, instead, activate the latter with
enable_obj_read_lock().

Sections that are currently protected by 'grep_read_mutex' but are not
internally protected by the object reading lock should be surrounded by
obj_read_lock() and obj_read_unlock(). These guarantee mutual exclusion
with object reading operations, keeping the current behavior and
avoiding race conditions. Namely, these places are:

  In grep.c:

  - fill_textconv() at fill_textconv_grep().
  - userdiff_get_textconv() at grep_source_1().

  In builtin/grep.c:

  - parse_object_or_die() and the submodule functions at
    grep_submodule().
  - deref_tag() and gitmodules_config_oid() at grep_objects().

If these functions become thread-safe, in the future, we might remove
the locking and probably get some speedup.

Note that some of the submodule functions will already be thread-safe
(or close to being thread-safe) with the internal object reading lock.
However, as some of them will require additional modifications to be
removed from the critical section, this will be done in its own patch.

Signed-off-by: Matheus Tavares <matheus.bernardino@usp.br>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-01-17 13:52:14 -08:00
.github
Documentation Revert "Merge branch 'ra/rebase-i-more-options'" 2020-01-12 13:25:18 -08:00
block-sha1
builtin grep: replace grep_read_mutex by internal obj read lock 2020-01-17 13:52:14 -08:00
ci Merge branch 'sg/osx-force-gcc-9' 2019-12-06 15:09:21 -08:00
compat Merge branch 'js/mingw-reserved-filenames' 2020-01-02 12:38:30 -08:00
contrib Merge branch 'dl/pretty-reference' 2019-12-10 13:11:43 -08:00
ewah
git-gui Merge https://github.com/prati0100/git-gui 2020-01-08 11:18:06 -08:00
gitk-git
gitweb Merge branch 'do/gitweb-typofix-in-comments' 2020-01-08 12:44:11 -08:00
mergetools
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po l10n: zh_CN: for git v2.25.0 l10n round 1 2020-01-12 19:22:02 +08:00
ppc
refs refs: pass NULL to refs_read_ref_full() because object ID is not needed 2019-12-11 13:48:42 -08:00
sha1collisiondetection@855827c583
sha1dc Merge branch 'jk/lore-is-the-archive' 2019-12-06 15:09:23 -08:00
sha256
t Revert "Merge branch 'ra/rebase-i-more-options'" 2020-01-12 13:25:18 -08:00
templates
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xdiff Merge branch 'rs/xdiff-ignore-ws-w-func-context' 2019-12-16 13:08:32 -08:00
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CODE_OF_CONDUCT.md
COPYING
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INSTALL
LGPL-2.1
Makefile Merge branch 'js/add-p-in-c' 2019-12-25 11:22:01 -08:00
README.md
RelNotes Git 2.24.1 2019-12-06 16:31:40 +01:00
abspath.c
aclocal.m4
add-interactive.c built-in add -p: implement hunk editing 2019-12-13 12:37:14 -08:00
add-interactive.h built-in add -p: implement hunk editing 2019-12-13 12:37:14 -08:00
add-patch.c built-in add -p: show helpful hint when nothing can be staged 2019-12-13 12:37:14 -08:00
advice.c
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apply.c Merge branch 'js/add-i-a-bit-more-tests' 2019-12-16 13:08:47 -08:00
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archive-tar.c
archive-zip.c Merge branch 'rs/archive-zip-code-cleanup' 2019-12-16 13:14:47 -08:00
archive.c
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argv-array.c
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attr.c
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azure-pipelines.yml
banned.h
base85.c
bisect.c
bisect.h
blame.c
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blob.c
blob.h
branch.c
branch.h
builtin.h
bulk-checkin.c
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bundle.c
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cache-tree.c
cache-tree.h
cache.h Merge branch 'ds/sparse-cone' 2020-01-06 14:17:51 -08:00
chdir-notify.c
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check-builtins.sh
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color.c
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column.c
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combine-diff.c
command-list.txt Merge branch 'ds/sparse-cone' 2019-12-25 11:21:58 -08:00
commit-graph.c Merge branch 'ds/commit-graph-set-size-mult' 2020-01-06 14:17:51 -08:00
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commit.c
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common-main.c
config.c
config.h
config.mak.dev
config.mak.in
config.mak.uname Sync with 2.23.1 2019-12-06 16:31:39 +01:00
configure.ac
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connect.h
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convert.c
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copy.c
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credential.c
credential.h
csum-file.c
csum-file.h
ctype.c
daemon.c
date.c
decorate.c
decorate.h
delta-islands.c
delta-islands.h
delta.h
detect-compiler
diff-delta.c
diff-lib.c
diff-no-index.c
diff.c
diff.h Merge branch 'hw/doc-in-header' 2019-12-16 13:08:39 -08:00
diffcore-break.c
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diffcore-order.c
diffcore-pickaxe.c
diffcore-rename.c
diffcore.h
dir-iterator.c
dir-iterator.h
dir.c Merge branch 'en/fill-directory-fixes' 2019-12-25 11:22:02 -08:00
dir.h Merge branch 'ds/sparse-cone' 2019-12-25 11:21:58 -08:00
editor.c
entry.c
environment.c Merge branch 'ds/sparse-cone' 2019-12-25 11:21:58 -08:00
exec-cmd.c
exec-cmd.h
fast-import.c Sync with 2.23.1 2019-12-06 16:31:39 +01:00
fetch-negotiator.c
fetch-negotiator.h
fetch-pack.c
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fmt-merge-msg.h
fsck.c Sync with Git 2.24.1 2019-12-09 22:17:55 -08:00
fsck.h
fsmonitor.c
fsmonitor.h
fuzz-commit-graph.c
fuzz-pack-headers.c
fuzz-pack-idx.c
generate-cmdlist.sh
gettext.c
gettext.h
git-add--interactive.perl git add -p: use non-zero exit code when the diff generation failed 2019-12-06 08:57:34 -08:00
git-archimport.perl
git-bisect.sh
git-compat-util.h Sync with Git 2.24.1 2019-12-09 22:17:55 -08:00
git-cvsexportcommit.perl
git-cvsimport.perl
git-cvsserver.perl
git-difftool--helper.sh
git-filter-branch.sh
git-instaweb.sh
git-legacy-stash.sh
git-merge-octopus.sh
git-merge-one-file.sh
git-merge-resolve.sh
git-mergetool--lib.sh
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git-p4.py Merge branch 'bk/p4-misc-usability' 2020-01-02 12:38:29 -08:00
git-parse-remote.sh
git-quiltimport.sh
git-rebase--preserve-merges.sh
git-request-pull.sh
git-send-email.perl
git-sh-i18n.sh
git-sh-setup.sh
git-submodule.sh Merge branch 'dl/submodule-set-url' 2019-12-10 13:11:42 -08:00
git-svn.perl
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git.c
git.rc
gpg-interface.c
gpg-interface.h
graph.c graph: fix lack of color in horizontal lines 2020-01-08 09:37:18 -08:00
graph.h
grep.c grep: replace grep_read_mutex by internal obj read lock 2020-01-17 13:52:14 -08:00
grep.h grep: replace grep_read_mutex by internal obj read lock 2020-01-17 13:52:14 -08:00
hash.h
hashmap.c
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help.c
help.h
hex.c
http-backend.c
http-fetch.c
http-push.c
http-walker.c
http.c
http.h
ident.c
imap-send.c
interdiff.c
interdiff.h
iterator.h
json-writer.c
json-writer.h
khash.h
kwset.c
kwset.h
levenshtein.c
levenshtein.h
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-options.h
list-objects-filter.c
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list-objects.c
list-objects.h
list.h
ll-merge.c
ll-merge.h
lockfile.c
lockfile.h
log-tree.c Merge branch 'hi/gpg-use-check-signature' 2019-12-10 13:11:45 -08:00
log-tree.h
ls-refs.c
ls-refs.h
mailinfo.c
mailinfo.h
mailmap.c
mailmap.h
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mem-pool.c
mem-pool.h
merge-blobs.c
merge-blobs.h
merge-recursive.c Merge branch 'en/merge-recursive-oid-eq-simplify' 2020-01-06 14:17:51 -08:00
merge-recursive.h
merge.c
mergesort.c
mergesort.h
midx.c
midx.h
name-hash.c
notes-cache.c
notes-cache.h
notes-merge.c
notes-merge.h
notes-utils.c
notes-utils.h
notes.c Merge branch 'dl/format-patch-notes-config-fixup' 2019-12-25 11:21:58 -08:00
notes.h Merge branch 'dl/format-patch-notes-config-fixup' 2019-12-25 11:21:58 -08:00
object-store.h object-store: allow threaded access to object reading 2020-01-17 13:52:14 -08:00
object.c replace-object: make replace operations thread-safe 2020-01-17 13:52:14 -08:00
object.h
oidmap.c
oidmap.h
oidset.c
oidset.h
pack-bitmap-write.c
pack-bitmap.c
pack-bitmap.h
pack-check.c
pack-objects.c
pack-objects.h
pack-revindex.c
pack-revindex.h
pack-write.c
pack.h
packfile.c object-store: allow threaded access to object reading 2020-01-17 13:52:14 -08:00
packfile.h
pager.c
parse-options-cb.c
parse-options.c
parse-options.h Merge branch 'hw/doc-in-header' 2019-12-16 13:08:39 -08:00
patch-delta.c
patch-ids.c
patch-ids.h
path.c Sync with Git 2.24.1 2019-12-09 22:17:55 -08:00
path.h
pathspec.c
pathspec.h Merge branch 'hw/doc-in-header' 2019-12-16 13:08:39 -08:00
pkt-line.c
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preload-index.c
pretty.c Merge branch 'dl/pretty-reference' 2019-12-10 13:11:43 -08:00
pretty.h
prio-queue.c
prio-queue.h
progress.c
progress.h
promisor-remote.c
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prompt.c
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protocol.c
protocol.h
quote.c
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range-diff.c range-diff: mark pointers as const 2019-12-06 12:34:49 -08:00
range-diff.h Merge branch 'dl/range-diff-with-notes' 2019-12-16 13:08:46 -08:00
reachable.c
reachable.h
read-cache.c Merge branch 'js/mingw-loosen-overstrict-tree-entry-checks' 2020-01-10 14:45:27 -08:00
rebase-interactive.c
rebase-interactive.h
ref-filter.c
ref-filter.h
reflog-walk.c
reflog-walk.h
refs.c
refs.h
refspec.c
refspec.h
remote-curl.c
remote-testsvn.c
remote.c
remote.h
replace-object.c replace-object: make replace operations thread-safe 2020-01-17 13:52:14 -08:00
replace-object.h replace-object: make replace operations thread-safe 2020-01-17 13:52:14 -08:00
repo-settings.c
repository.c
repository.h
rerere.c
rerere.h
resolve-undo.c
resolve-undo.h
revision.c Merge branch 'dl/format-patch-notes-config-fixup' 2019-12-25 11:21:58 -08:00
revision.h Merge branch 'dl/format-patch-notes-config-fixup' 2019-12-25 11:21:58 -08:00
run-command.c
run-command.h
send-pack.c Merge branch 'jk/send-pack-check-negative-with-quick' 2019-12-06 15:09:22 -08:00
send-pack.h
sequencer.c Revert "Merge branch 'ra/rebase-i-more-options'" 2020-01-12 13:25:18 -08:00
sequencer.h Revert "Merge branch 'ra/rebase-i-more-options'" 2020-01-12 13:25:18 -08:00
serve.c
serve.h
server-info.c
setup.c
sh-i18n--envsubst.c
sha1-array.c
sha1-array.h
sha1-file.c object-store: allow threaded access to object reading 2020-01-17 13:52:14 -08:00
sha1-lookup.c
sha1-lookup.h
sha1-name.c
sha1dc_git.c
sha1dc_git.h
shallow.c
shell.c
shortlog.h
sideband.c
sideband.h
sigchain.c
sigchain.h
split-index.c
split-index.h
stable-qsort.c
strbuf.c strbuf: add a helper function to call the editor "on an strbuf" 2019-12-13 12:37:14 -08:00
strbuf.h strbuf: add a helper function to call the editor "on an strbuf" 2019-12-13 12:37:14 -08:00
streaming.c
streaming.h
string-list.c
string-list.h
sub-process.c
sub-process.h
submodule-config.c fix-typo: consecutive-word duplications 2019-12-16 11:53:11 -08:00
submodule-config.h
submodule.c Sync with 2.22.2 2019-12-06 16:31:30 +01:00
submodule.h Sync with 2.22.2 2019-12-06 16:31:30 +01:00
symlinks.c
tag.c
tag.h
tar.h
tempfile.c
tempfile.h
thread-utils.c
thread-utils.h
tmp-objdir.c
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trace.c
trace.h
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trailer.c
trailer.h
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transport-internal.h
transport.c
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tree-diff.c
tree-walk.c Merge branch 'js/mingw-loosen-overstrict-tree-entry-checks' 2020-01-06 14:17:50 -08:00
tree-walk.h
tree.c
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unicode-width.h
unimplemented.sh
unix-socket.c
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unpack-trees.c Merge branch 'ds/sparse-cone' 2019-12-25 11:21:58 -08:00
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upload-pack.c
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url.c
url.h
urlmatch.c
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usage.c
userdiff.c Merge branch 'ln/userdiff-elixir' 2019-12-25 11:21:59 -08:00
userdiff.h
utf8.c
utf8.h
varint.c
varint.h
version.c
version.h
versioncmp.c
walker.c
walker.h
wildmatch.c
wildmatch.h
worktree.c
worktree.h
wrap-for-bin.sh
wrapper.c
write-or-die.c
ws.c
wt-status.c
wt-status.h
xdiff-interface.c
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).

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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