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Ævar Arnfjörð Bjarmason 9264d29bf6 send-email: lazily load config for a big speedup Reduce the time it takes git-send-email to get to even the most trivial of tasks (such as serving up its "-h" output) by first listing config keys that exist, and only then only call e.g. "git config --bool" on them if they do. Over a lot of runs this speeds the time to "-h" up for me from ~250ms to ~150ms, and the runtime of t9001-send-email.sh goes from ~25s to ~20s. This introduces a race condition where we'll do the "wrong" thing if a config key were to be inserted between us discovering the list and calling read_config(), i.e. we won't know about the racily added key. In theory this is a change in behavior, in practice it doesn't matter. The config_regexp() function being changed here was added in `dd84e528a3` (git-send-email: die if sendmail.* config is set, 2020-07-23) for use by git-send-email. So we can change its odd return value in the case where no values are found by "git config". The difference in the *.pm code would matter if it was invoked in scalar context, but now it no longer is. Arguably this caching belongs in Git.pm itself, but in lieu of modifying it for all its callers let's only do this for "git send-email". The other big potential win would be "git svn", but unlike "git send-email" it doesn't check tens of config variables one at a time at startup (in my brief testing it doesn't check any). Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>		2021-05-28 18:38:07 +09:00
.github	…
Documentation	send-email: remove non-working support for "sendemail.smtpssl"	2021-05-28 18:38:07 +09:00
block-sha1	…
builtin	dir: introduce readdir_skip_dot_and_dotdot() helper	2021-05-27 14:02:37 +09:00
ci	Merge branch 'mt/parallel-checkout-part-3'	2021-05-16 21:05:23 +09:00
compat	Merge branch 'jh/simple-ipc-sans-pthread'	2021-05-22 18:29:01 +09:00
contrib	Merge branch 'jh/simple-ipc-sans-pthread'	2021-05-22 18:29:01 +09:00
ewah	…
git-gui	…
gitk-git	…
gitweb	…
mergetools	…
negotiator	…
perl	Merge branch 'ab/send-email-inline-hooks-path'	2021-05-27 12:36:57 +09:00
po	…
ppc	…
refs	Merge branch 'wc/packed-ref-removal-cleanup'	2021-05-16 21:05:24 +09:00
sha1collisiondetection@855827c583	…
sha1dc	…
sha256	…
t	send-email tests: test for boolean variables without a value	2021-05-28 18:38:07 +09:00
templates	…
trace2	…
xdiff	Merge branch 'pw/patience-diff-clean-up'	2021-05-14 08:26:08 +09:00
.cirrus.yml	…
.clang-format	…
.editorconfig	…
.gitattributes	…
.gitignore	Merge branch 'ls/subtree'	2021-05-10 16:59:47 +09:00
.gitmodules	…
.mailmap	…
.travis.yml	…
.tsan-suppressions	…
CODE_OF_CONDUCT.md	…
COPYING	…
GIT-VERSION-GEN	Git 2.32-rc2	2021-05-28 13:05:29 +09:00
INSTALL	…
LGPL-2.1	…
Makefile	Merge branch 'jh/simple-ipc-sans-pthread'	2021-05-22 18:29:01 +09:00
README.md	…
RelNotes	…
SECURITY.md	…
abspath.c	…
aclocal.m4	…
add-interactive.c	…
add-interactive.h	…
add-patch.c	…
advice.c	…
advice.h	…
alias.c	…
alias.h	…
alloc.c	…
alloc.h	…
apply.c	Merge branch 'jz/apply-3way-first-message-fix'	2021-05-07 12:47:38 +09:00
apply.h	…
archive-tar.c	…
archive-zip.c	…
archive.c	…
archive.h	…
attr.c	…
attr.h	…
banned.h	…
base85.c	…
bisect.c	…
bisect.h	…
blame.c	…
blame.h	…
blob.c	…
blob.h	…
bloom.c	Merge branch 'ah/plugleaks'	2021-05-07 12:47:41 +09:00
bloom.h	…
branch.c	Merge branch 'bc/hash-transition-interop-part-1'	2021-05-10 16:59:46 +09:00
branch.h	…
builtin.h	…
bulk-checkin.c	…
bulk-checkin.h	…
bundle.c	…
bundle.h	…
cache-tree.c	…
cache-tree.h	…
cache.h	Merge branch 'mt/parallel-checkout-part-3'	2021-05-16 21:05:23 +09:00
chdir-notify.c	…
chdir-notify.h	…
check-builtins.sh	…
check_bindir	…
checkout.c	…
checkout.h	…
chunk-format.c	…
chunk-format.h	…
color.c	…
color.h	…
column.c	…
column.h	…
combine-diff.c	…
command-list.txt	…
commit-graph.c	…
commit-graph.h	…
commit-reach.c	…
commit-reach.h	…
commit-slab-decl.h	…
commit-slab-impl.h	…
commit-slab.h	…
commit.c	…
commit.h	…
common-main.c	…
config.c	Merge branch 'ps/config-global-override'	2021-05-07 12:47:39 +09:00
config.h	…
config.mak.dev	…
config.mak.in	…
config.mak.uname	…
configure.ac	…
connect.c	…
connect.h	…
connected.c	…
connected.h	…
convert.c	…
convert.h	…
copy.c	…
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-merges.c	…
diff-merges.h	…
diff-no-index.c	dir: introduce readdir_skip_dot_and_dotdot() helper	2021-05-27 14:02:37 +09:00
diff.c	Merge branch 'pw/word-diff-zero-width-matches'	2021-05-14 08:26:06 +09:00
diff.h	…
diffcore-break.c	…
diffcore-delta.c	…
diffcore-order.c	…
diffcore-pickaxe.c	…
diffcore-rename.c	…
diffcore-rotate.c	…
diffcore.h	…
dir-iterator.c	…
dir-iterator.h	…
dir.c	Merge branch 'en/dir-traversal'	2021-05-28 13:03:00 +09:00
dir.h	dir: introduce readdir_skip_dot_and_dotdot() helper	2021-05-27 14:02:37 +09:00
editor.c	…
entry.c	dir: introduce readdir_skip_dot_and_dotdot() helper	2021-05-27 14:02:37 +09:00
entry.h	…
environment.c	…
environment.h	…
exec-cmd.c	…
exec-cmd.h	…
fetch-negotiator.c	…
fetch-negotiator.h	…
fetch-pack.c	…
fetch-pack.h	…
fmt-merge-msg.c	…
fmt-merge-msg.h	…
fsck.c	…
fsck.h	…
fsmonitor.c	…
fsmonitor.h	…
fuzz-commit-graph.c	…
fuzz-pack-headers.c	…
fuzz-pack-idx.c	…
generate-cmdlist.sh	…
generate-configlist.sh	…
gettext.c	…
gettext.h	…
git-add--interactive.perl	…
git-archimport.perl	…
git-bisect.sh	…
git-compat-util.h	…
git-cvsexportcommit.perl	…
git-cvsimport.perl	…
git-cvsserver.perl	…
git-difftool--helper.sh	…
git-filter-branch.sh	…
git-instaweb.sh	…
git-merge-octopus.sh	…
git-merge-one-file.sh	…
git-merge-resolve.sh	…
git-mergetool--lib.sh	…
git-mergetool.sh	…
git-p4.py	git-p4: speed up search for branch parent	2021-05-06 12:51:33 +09:00
git-quiltimport.sh	…
git-rebase--preserve-merges.sh	…
git-request-pull.sh	…
git-send-email.perl	send-email: lazily load config for a big speedup	2021-05-28 18:38:07 +09:00
git-sh-i18n.sh	…
git-sh-setup.sh	…
git-submodule.sh	…
git-svn.perl	…
git-web--browse.sh	…
git.c	Merge branch 'ps/config-env-option-with-separate-value'	2021-05-07 12:47:37 +09:00
git.rc	…
gpg-interface.c	…
gpg-interface.h	…
graph.c	…
graph.h	…
grep.c	…
grep.h	…
hash-lookup.c	…
hash-lookup.h	…
hash.h	…
hashmap.c	…
hashmap.h	…
help.c	…
help.h	…
hex.c	…
http-backend.c	…
http-fetch.c	…
http-push.c	Merge branch 'bc/hash-transition-interop-part-1'	2021-05-10 16:59:46 +09:00
http-walker.c	…
http.c	Merge branch 'cs/http-use-basic-after-failed-negotiate'	2021-05-21 05:49:41 +09:00
http.h	…
ident.c	…
imap-send.c	…
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	…
list-objects-filter.h	…
list-objects.c	…
list-objects.h	…
list.h	…
ll-merge.c	…
ll-merge.h	…
lockfile.c	…
lockfile.h	…
log-tree.c	…
log-tree.h	…
ls-refs.c	…
ls-refs.h	…
mailinfo.c	Merge branch 'dd/mailinfo-quoted-cr'	2021-05-16 21:05:23 +09:00
mailinfo.h	am: learn to process quoted lines that ends with CRLF	2021-05-10 15:06:22 +09:00
mailmap.c	…
mailmap.h	…
match-trees.c	…
mem-pool.c	…
mem-pool.h	…
merge-blobs.c	…
merge-blobs.h	…
merge-ort-wrappers.c	…
merge-ort-wrappers.h	…
merge-ort.c	Merge branch 'ah/merge-ort-i18n'	2021-05-16 21:05:23 +09:00
merge-ort.h	…
merge-recursive.c	Merge branch 'js/merge-already-up-to-date-message-reword'	2021-05-11 15:27:22 +09:00
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	dir: introduce readdir_skip_dot_and_dotdot() helper	2021-05-27 14:02:37 +09:00
notes-merge.h	…
notes-utils.c	…
notes-utils.h	…
notes.c	…
notes.h	…
object-file.c	dir: introduce readdir_skip_dot_and_dotdot() helper	2021-05-27 14:02:37 +09:00
object-name.c	…
object-store.h	…
object.c	…
object.h	Merge branch 'jt/push-negotiation'	2021-05-16 21:05:22 +09:00
oid-array.c	…
oid-array.h	…
oidmap.c	…
oidmap.h	…
oidset.c	…
oidset.h	…
pack-bitmap-write.c	…
pack-bitmap.c	Merge branch 'ps/rev-list-object-type-filter'	2021-05-07 12:47:41 +09:00
pack-bitmap.h	Merge branch 'ps/rev-list-object-type-filter'	2021-05-07 12:47:41 +09:00
pack-check.c	…
pack-objects.c	…
pack-objects.h	pack-objects: move static inline from a header to the sole consumer	2021-05-27 12:14:41 +09:00
pack-revindex.c	…
pack-revindex.h	…
pack-write.c	…
pack.h	…
packfile.c	dir: introduce readdir_skip_dot_and_dotdot() helper	2021-05-27 14:02:37 +09:00
packfile.h	…
pager.c	…
parallel-checkout.c	…
parallel-checkout.h	…
parse-options-cb.c	…
parse-options.c	…
parse-options.h	…
patch-delta.c	…
patch-ids.c	…
patch-ids.h	…
path.c	…
path.h	…
pathspec.c	Merge branch 'mt/add-rm-in-sparse-checkout'	2021-05-07 12:47:40 +09:00
pathspec.h	Merge branch 'mt/add-rm-in-sparse-checkout'	2021-05-07 12:47:40 +09:00
pkt-line.c	…
pkt-line.h	…
preload-index.c	…
pretty.c	…
pretty.h	…
prio-queue.c	…
prio-queue.h	…
progress.c	…
progress.h	…
promisor-remote.c	…
promisor-remote.h	…
prompt.c	…
prompt.h	…
protocol-caps.c	…
protocol-caps.h	…
protocol.c	…
protocol.h	…
prune-packed.c	…
prune-packed.h	…
quote.c	…
quote.h	…
range-diff.c	…
range-diff.h	…
reachable.c	Merge branch 'ps/rev-list-object-type-filter'	2021-05-07 12:47:41 +09:00
reachable.h	…
read-cache.c	Merge branch 'mt/parallel-checkout-part-3'	2021-05-16 21:05:23 +09:00
rebase-interactive.c	…
rebase-interactive.h	…
rebase.c	…
rebase.h	…
ref-filter.c	Merge branch 'zh/ref-filter-push-remote-fix'	2021-05-20 08:55:00 +09:00
ref-filter.h	…
reflog-walk.c	…
reflog-walk.h	…
refs.c	Merge branch 'bc/hash-transition-interop-part-1'	2021-05-10 16:59:46 +09:00
refs.h	…
refspec.c	…
refspec.h	…
remote-curl.c	remote-curl: fix clone on sha256 repos	2021-05-12 12:14:44 +09:00
remote.c	…
remote.h	…
replace-object.c	…
replace-object.h	…
repo-settings.c	…
repository.c	…
repository.h	…
rerere.c	dir: introduce readdir_skip_dot_and_dotdot() helper	2021-05-27 14:02:37 +09:00
rerere.h	…
reset.c	…
reset.h	…
resolve-undo.c	…
resolve-undo.h	…
revision.c	Merge branch 'ah/plugleaks'	2021-05-07 12:47:41 +09:00
revision.h	…
run-command.c	…
run-command.h	…
send-pack.c	…
send-pack.h	…
sequencer.c	Merge branch 'bc/hash-transition-interop-part-1'	2021-05-10 16:59:46 +09:00
sequencer.h	…
serve.c	…
serve.h	…
server-info.c	…
setup.c	…
sh-i18n--envsubst.c	…
sha1dc_git.c	…
sha1dc_git.h	…
shallow.c	…
shallow.h	…
shell.c	…
shortlog.h	…
sideband.c	…
sideband.h	…
sigchain.c	…
sigchain.h	…
simple-ipc.h	simple-ipc: correct ifdefs when NO_PTHREADS is defined	2021-05-21 07:55:00 +09:00
sparse-index.c	Merge branch 'ds/sparse-index-protections'	2021-05-21 05:50:38 +09:00
sparse-index.h	…
split-index.c	…
split-index.h	…
stable-qsort.c	…
strbuf.c	…
strbuf.h	…
streaming.c	streaming.c: move {open,close,read} from vtable to "struct git_istream"	2021-05-06 12:56:10 +09:00
streaming.h	…
string-list.c	…
string-list.h	…
strmap.c	…
strmap.h	…
strvec.c	…
strvec.h	…
sub-process.c	…
sub-process.h	…
submodule-config.c	…
submodule-config.h	…
submodule.c	Merge branch 'bc/hash-transition-interop-part-1'	2021-05-10 16:59:46 +09:00
submodule.h	…
symlinks.c	…
tag.c	…
tag.h	…
tar.h	…
tempfile.c	…
tempfile.h	…
thread-utils.c	…
thread-utils.h	…
tmp-objdir.c	…
tmp-objdir.h	…
trace.c	…
trace.h	…
trace2.c	…
trace2.h	…
trailer.c	…
trailer.h	…
transport-helper.c	…
transport-internal.h	…
transport.c	Merge branch 'jt/push-negotiation'	2021-05-16 21:05:22 +09:00
transport.h	…
tree-diff.c	…
tree-walk.c	…
tree-walk.h	…
tree.c	…
tree.h	…
unicode-width.h	…
unimplemented.sh	…
unix-socket.c	…
unix-socket.h	…
unix-stream-server.c	…
unix-stream-server.h	…
unpack-trees.c	Merge branch 'mt/parallel-checkout-part-3'	2021-05-16 21:05:23 +09:00
unpack-trees.h	…
upload-pack.c	Merge branch 'jt/push-negotiation'	2021-05-16 21:05:22 +09:00
upload-pack.h	…
url.c	…
url.h	…
urlmatch.c	…
urlmatch.h	…
usage.c	…
userdiff.c	…
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	dir: introduce readdir_skip_dot_and_dotdot() helper	2021-05-27 14:02:37 +09:00
worktree.h	…
wrap-for-bin.sh	…
wrapper.c	…
write-or-die.c	…
ws.c	…
wt-status.c	Merge branch 'bc/hash-transition-interop-part-1'	2021-05-10 16:59:46 +09:00
wt-status.h	…
xdiff-interface.c	…
xdiff-interface.h	…
zlib.c	…

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-<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