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Patrick Steinhardt a021e4f92c cache-tree: allow writing in-memory index as tree The function `write_in_core_index_as_tree()` takes a repository and writes its index into a tree object. What this function cannot do though is to take an _arbitrary_ in-memory index. Introduce a new `struct index_state` parameter so that the caller can pass a different index than the one belonging to the repository. This will be used in a subsequent commit. Signed-off-by: Patrick Steinhardt <ps@pks.im> Signed-off-by: Junio C Hamano <gitster@pobox.com>		2026-03-03 15:09:36 -08:00
.github	Merge branch 'ps/ci-gitlab-msvc-updates'	2026-02-27 15:11:52 -08:00
Documentation	The 10th batch	2026-03-03 11:08:13 -08:00
bin-wrappers	…
block-sha1	…
builtin	cache-tree: allow writing in-memory index as tree	2026-03-03 15:09:36 -08:00
ci	Merge branch 'ps/ci-gitlab-msvc-updates'	2026-02-27 15:11:52 -08:00
compat	Merge branch 'mc/tr2-process-ancestry-cleanup'	2026-02-25 11:54:18 -08:00
compiler-tricks	…
contrib	Merge branch 'cs/subtree-split-fixes'	2026-03-03 11:08:12 -08:00
ewah	cocci: extend MEMZERO_ARRAY() rules	2026-02-03 09:41:52 -08:00
git-gui	Merge branch 'master' of https://github.com/j6t/git-gui	2026-01-25 09:08:06 -08:00
gitk-git	Merge branch 'master' of https://github.com/j6t/gitk	2026-02-11 14:49:53 -08:00
gitweb	…
mergetools	…
negotiator	…
odb	…
oss-fuzz	…
perl	…
po	Merge branch 'jx/zh_CN' of github.com:jiangxin/git	2026-01-31 21:32:54 +08:00
refs	Merge branch 'kn/ref-batch-output-error-reporting-fix'	2026-02-09 12:09:10 -08:00
reftable	…
sha1	…
sha1collisiondetection@855827c583	…
sha1dc	…
sha256	…
src	…
subprojects	meson: wire up gitk and git-gui	2026-02-04 09:42:50 -08:00
t	Merge branch 'hy/diff-lazy-fetch-with-break-fix'	2026-03-03 11:08:13 -08:00
templates	templates: detect commit messages containing diffs	2026-02-13 09:26:11 -08:00
trace2	…
xdiff	Merge branch 'pw/diff-anchored-optim'	2026-02-20 11:36:18 -08:00
.cirrus.yml	…
.clang-format	…
.editorconfig	templates: add .gitattributes entry for sample hooks	2026-02-13 09:26:11 -08:00
.gitattributes	templates: add .gitattributes entry for sample hooks	2026-02-13 09:26:11 -08:00
.gitignore	…
.gitlab-ci.yml	gitlab-ci: handle failed tests on MSVC+Meson job	2026-02-19 10:22:31 -08:00
.gitmodules	…
.mailmap	.mailmap: fix email for Phil Hord	2026-02-03 10:29:00 -08:00
.tsan-suppressions	…
CODE_OF_CONDUCT.md	…
COPYING	…
Cargo.toml	…
GIT-BUILD-OPTIONS.in	…
GIT-VERSION-FILE.in	…
GIT-VERSION-GEN	Start 2.54 cycle	2026-02-05 15:42:01 -08:00
INSTALL	…
LGPL-2.1	…
Makefile	Merge branch 'cc/lop-filter-auto'	2026-02-25 11:54:17 -08:00
README.md	…
RelNotes	Start 2.54 cycle	2026-02-05 15:42:01 -08:00
SECURITY.md	…
abspath.c	…
abspath.h	…
aclocal.m4	…
add-interactive.c	add-patch: allow disabling editing of hunks	2026-03-03 15:09:36 -08:00
add-interactive.h	add-patch: split out `struct interactive_options`	2026-03-03 15:09:35 -08:00
add-patch.c	add-patch: allow disabling editing of hunks	2026-03-03 15:09:36 -08:00
add-patch.h	add-patch: allow disabling editing of hunks	2026-03-03 15:09:36 -08:00
advice.c	…
advice.h	…
alias.c	alias: support non-alphanumeric names via subsection syntax	2026-02-19 10:13:20 -08:00
alias.h	…
alloc.c	…
alloc.h	…
apply.c	Merge branch 'jc/whitespace-incomplete-line'	2026-02-27 15:11:52 -08:00
apply.h	…
archive-tar.c	…
archive-zip.c	…
archive.c	…
archive.h	…
attr.c	…
attr.h	…
banned.h	…
base85.c	…
base85.h	…
bisect.c	Merge branch 'ps/for-each-ref-in-fixes'	2026-02-27 15:11:50 -08:00
bisect.h	…
blame.c	…
blame.h	…
blob.c	…
blob.h	…
bloom.c	…
bloom.h	…
branch.c	…
branch.h	…
builtin.h	Merge branch 'ps/history'	2026-02-09 12:09:09 -08:00
bundle-uri.c	…
bundle-uri.h	…
bundle.c	…
bundle.h	…
cache-tree.c	cache-tree: allow writing in-memory index as tree	2026-03-03 15:09:36 -08:00
cache-tree.h	cache-tree: allow writing in-memory index as tree	2026-03-03 15:09:36 -08:00
cbtree.c	…
cbtree.h	…
chdir-notify.c	…
chdir-notify.h	…
check-builtins.sh	…
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	Merge branch 'ps/odb-for-each-object'	2026-03-02 17:06:50 -08:00
commit-graph.h	…
commit-reach.c	…
commit-reach.h	…
commit-slab-decl.h	…
commit-slab-impl.h	…
commit-slab.h	…
commit.c	Merge branch 'ps/receive-pack-shallow-optim'	2026-03-02 17:06:53 -08:00
commit.h	add-patch: split out `struct interactive_options`	2026-03-03 15:09:35 -08:00
common-exit.c	…
common-init.c	…
common-init.h	…
common-main.c	…
config.c	global: constify some pointers that are not written to	2026-02-05 17:52:49 -08:00
config.h	…
config.mak.dev	…
config.mak.in	…
config.mak.uname	Merge branch 'mc/tr2-process-ancestry-cleanup'	2026-02-25 11:54:18 -08:00
configure.ac	…
connect.c	promisor-remote: change promisor_remote_reply()'s signature	2026-02-17 11:46:41 -08:00
connect.h	…
connected.c	…
connected.h	…
convert.c	global: constify some pointers that are not written to	2026-02-05 17:52:49 -08:00
convert.h	…
copy.c	…
copy.h	…
credential.c	…
credential.h	…
csum-file.c	…
csum-file.h	…
ctype.c	…
daemon.c	…
date.c	…
date.h	…
decorate.c	…
decorate.h	…
delta-islands.c	…
delta-islands.h	…
delta.h	…
detect-compiler	…
diagnose.c	…
diagnose.h	…
diff-delta.c	…
diff-lib.c	Merge branch 'ps/commit-list-functions-renamed'	2026-02-13 13:39:25 -08:00
diff-merges.c	…
diff-merges.h	…
diff-no-index.c	…
diff.c	Merge branch 'jc/whitespace-incomplete-line'	2026-02-27 15:11:52 -08:00
diff.h	…
diffcore-break.c	diffcore-break: avoid segfault with freed entries	2026-02-24 07:20:44 -08:00
diffcore-delta.c	cocci: extend MEMZERO_ARRAY() rules	2026-02-03 09:41:52 -08:00
diffcore-order.c	…
diffcore-pickaxe.c	…
diffcore-rename.c	global: constify some pointers that are not written to	2026-02-05 17:52:49 -08:00
diffcore-rotate.c	…
diffcore.h	…
dir-iterator.c	…
dir-iterator.h	…
dir.c	…
dir.h	…
editor.c	…
editor.h	…
entry.c	…
entry.h	…
environment.c	Merge branch 'pc/lockfile-pid'	2026-02-17 13:30:41 -08:00
environment.h	Merge branch 'rs/tree-wo-the-repository'	2026-01-21 16:16:28 -08:00
exec-cmd.c	…
exec-cmd.h	…
fetch-negotiator.c	…
fetch-negotiator.h	…
fetch-pack.c	fetch-pack: wire up and enable auto filter logic	2026-02-17 11:46:41 -08:00
fetch-pack.h	…
fmt-merge-msg.c	Merge branch 'ps/commit-list-functions-renamed'	2026-02-13 13:39:25 -08:00
fmt-merge-msg.h	…
for-each-ref.h	…
fsck.c	global: constify some pointers that are not written to	2026-02-05 17:52:49 -08:00
fsck.h	…
fsmonitor--daemon.h	…
fsmonitor-ipc.c	…
fsmonitor-ipc.h	…
fsmonitor-ll.h	…
fsmonitor-path-utils.h	…
fsmonitor-settings.c	…
fsmonitor-settings.h	…
fsmonitor.c	…
fsmonitor.h	…
generate-cmdlist.sh	…
generate-configlist.sh	…
generate-hooklist.sh	…
generate-perl.sh	…
generate-python.sh	…
generate-script.sh	…
gettext.c	…
gettext.h	…
git-archimport.perl	…
git-compat-util.h	…
git-curl-compat.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-quiltimport.sh	…
git-request-pull.sh	…
git-send-email.perl	…
git-sh-i18n.sh	…
git-sh-setup.sh	…
git-submodule.sh	…
git-svn.perl	…
git-web--browse.sh	…
git-zlib.c	…
git-zlib.h	…
git.c	…
git.rc.in	…
gpg-interface.c	Merge branch 'uk/signature-is-good-after-key-expires'	2026-03-02 17:06:50 -08:00
gpg-interface.h	…
graph.c	…
graph.h	…
grep.c	…
grep.h	…
hash-lookup.c	…
hash-lookup.h	…
hash.c	…
hash.h	…
hashmap.c	…
hashmap.h	…
help.c	Merge branch 'jh/alias-i18n'	2026-02-27 15:11:53 -08:00
help.h	…
hex-ll.c	…
hex-ll.h	…
hex.c	…
hex.h	…
hook.c	Revert "Merge branch 'ar/run-command-hook'"	2026-01-15 13:02:38 -08:00
hook.h	Revert "Merge branch 'ar/run-command-hook'"	2026-01-15 13:02:38 -08:00
http-backend.c	Merge branch 'kt/http-backend-errors'	2026-01-21 08:28:58 -08:00
http-fetch.c	…
http-push.c	global: constify some pointers that are not written to	2026-02-05 17:52:49 -08:00
http-walker.c	…
http.c	…
http.h	…
ident.c	…
ident.h	…
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: support 'auto' mode for --filter	2026-02-17 11:46:40 -08:00
list-objects-filter-options.h	list-objects-filter-options: support 'auto' mode for --filter	2026-02-17 11:46:40 -08:00
list-objects-filter.c	list-objects-filter-options: support 'auto' mode for --filter	2026-02-17 11:46:40 -08:00
list-objects-filter.h	…
list-objects.c	…
list-objects.h	…
list.h	…
lockfile.c	Merge branch 'pc/lockfile-pid'	2026-02-17 13:30:41 -08:00
lockfile.h	lockfile: add PID file for debugging stale locks	2026-01-22 12:15:46 -08:00
log-tree.c	…
log-tree.h	…
loose.c	…
loose.h	…
ls-refs.c	…
ls-refs.h	…
mailinfo.c	global: constify some pointers that are not written to	2026-02-05 17:52:49 -08:00
mailinfo.h	…
mailmap.c	…
mailmap.h	…
match-trees.c	…
match-trees.h	…
mem-pool.c	global: constify some pointers that are not written to	2026-02-05 17:52:49 -08:00
mem-pool.h	…
merge-blobs.c	…
merge-blobs.h	…
merge-ll.c	…
merge-ll.h	…
merge-ort-wrappers.c	…
merge-ort-wrappers.h	…
merge-ort.c	Merge branch 'rs/xdiff-wo-the-repository'	2026-02-17 13:30:42 -08:00
merge-ort.h	…
merge.c	…
merge.h	…
mergesort.h	…
meson.build	Merge branch 'ps/meson-gitk-git-gui'	2026-03-02 17:06:52 -08:00
meson_options.txt	meson: wire up gitk and git-gui	2026-02-04 09:42:50 -08:00
midx-write.c	Merge branch 'tb/midx-write-corrupt-checksum-fix'	2026-01-21 16:16:27 -08:00
midx.c	Merge branch 'ps/packfile-store-in-odb-source'	2026-01-21 08:28:59 -08:00
midx.h	…
name-hash.c	…
name-hash.h	…
notes-cache.c	…
notes-cache.h	…
notes-merge.c	Merge branch 'rs/xdiff-wo-the-repository'	2026-02-17 13:30:42 -08:00
notes-merge.h	…
notes-utils.c	…
notes-utils.h	…
notes.c	string-list: add string_list_sort_u() that mimics "sort -u"	2026-01-29 09:32:50 -08:00
notes.h	…
object-file-convert.c	remove duplicate includes	2026-02-08 15:03:06 -08:00
object-file-convert.h	…
object-file.c	Merge branch 'jt/object-file-use-container-of'	2026-03-02 17:06:53 -08:00
object-file.h	Merge branch 'ps/object-info-bits-cleanup'	2026-03-02 17:06:52 -08:00
object-name.c	Merge branch 'ps/commit-list-functions-renamed'	2026-02-13 13:39:25 -08:00
object-name.h	…
object.c	commit: avoid parsing non-commits in `lookup_commit_reference_gently()`	2026-02-19 09:34:16 -08:00
object.h	Merge branch 'ps/receive-pack-shallow-optim'	2026-03-02 17:06:53 -08:00
odb.c	Merge branch 'ps/object-info-bits-cleanup'	2026-03-02 17:06:52 -08:00
odb.h	Merge branch 'ps/object-info-bits-cleanup'	2026-03-02 17:06:52 -08:00
oid-array.c	…
oid-array.h	…
oidmap.c	…
oidmap.h	…
oidset.c	…
oidset.h	…
oidtree.c	…
oidtree.h	…
pack-bitmap-write.c	Merge branch 'ps/commit-list-functions-renamed'	2026-02-13 13:39:25 -08:00
pack-bitmap.c	pack-bitmap: fix bug with exact ref match in "pack.preferBitmapTips"	2026-02-19 10:41:18 -08:00
pack-bitmap.h	pack-bitmap: deduplicate logic to iterate over preferred bitmap tips	2026-02-19 10:41:18 -08:00
pack-check.c	…
pack-mtimes.c	…
pack-mtimes.h	…
pack-objects.c	…
pack-objects.h	…
pack-refs.c	…
pack-refs.h	…
pack-revindex.c	global: constify some pointers that are not written to	2026-02-05 17:52:49 -08:00
pack-revindex.h	…
pack-write.c	…
pack.h	…
packfile.c	Merge branch 'ps/object-info-bits-cleanup'	2026-03-02 17:06:52 -08:00
packfile.h	Merge branch 'ps/object-info-bits-cleanup'	2026-03-02 17:06:52 -08:00
pager.c	…
pager.h	…
parallel-checkout.c	…
parallel-checkout.h	…
parse-options-cb.c	…
parse-options.c	…
parse-options.h	…
parse.c	…
parse.h	…
patch-delta.c	…
patch-ids.c	…
patch-ids.h	…
path-walk.c	…
path-walk.h	…
path.c	path: factor out skip_slashes() in normalize_path_copy_len()	2026-02-21 21:25:56 -08:00
path.h	…
pathspec.c	…
pathspec.h	…
pkt-line.c	global: constify some pointers that are not written to	2026-02-05 17:52:49 -08:00
pkt-line.h	…
preload-index.c	…
preload-index.h	…
pretty.c	…
pretty.h	…
prio-queue.c	…
prio-queue.h	…
progress.c	…
progress.h	…
promisor-remote.c	promisor-remote: change promisor_remote_reply()'s signature	2026-02-17 11:46:41 -08:00
promisor-remote.h	promisor-remote: change promisor_remote_reply()'s signature	2026-02-17 11:46:41 -08:00
prompt.c	…
prompt.h	…
protocol-caps.c	remove duplicate includes	2026-02-08 15:03:06 -08:00
protocol-caps.h	…
protocol.c	…
protocol.h	…
prune-packed.c	…
prune-packed.h	…
pseudo-merge.c	…
pseudo-merge.h	…
quote.c	…
quote.h	…
range-diff.c	…
range-diff.h	…
reachable.c	reachable: convert to use `odb_for_each_object()`	2026-01-26 08:26:08 -08:00
reachable.h	…
read-cache-ll.h	…
read-cache.c	Merge branch 'js/symlink-windows'	2026-01-23 13:34:37 -08:00
read-cache.h	…
rebase-interactive.c	…
rebase-interactive.h	…
rebase.c	…
rebase.h	…
ref-filter.c	Merge branch 'jk/ref-filter-lrstrip-optim'	2026-02-27 15:11:51 -08:00
ref-filter.h	…
reflog-walk.c	global: constify some pointers that are not written to	2026-02-05 17:52:49 -08:00
reflog-walk.h	…
reflog.c	…
reflog.h	…
refs.c	Merge branch 'kn/ref-batch-output-error-reporting-fix'	2026-02-09 12:09:10 -08:00
refs.h	Merge branch 'kn/ref-batch-output-error-reporting-fix'	2026-02-09 12:09:10 -08:00
refspec.c	…
refspec.h	…
remote-curl.c	…
remote.c	Merge branch 'ps/commit-list-functions-renamed'	2026-02-13 13:39:25 -08:00
remote.h	remote: always allocate branch.push_tracking_ref	2026-01-19 16:24:02 -08:00
repack-cruft.c	…
repack-filtered.c	…
repack-geometry.c	…
repack-midx.c	pack-bitmap: deduplicate logic to iterate over preferred bitmap tips	2026-02-19 10:41:18 -08:00
repack-promisor.c	Merge branch 'ps/odb-for-each-object'	2026-03-02 17:06:50 -08:00
repack.c	…
repack.h	…
replace-object.c	…
replace-object.h	…
replay.c	…
replay.h	…
repo-settings.c	…
repo-settings.h	…
repository.c	Merge branch 'ar/submodule-gitdir-tweak'	2026-02-05 15:41:58 -08:00
repository.h	Merge branch 'ar/submodule-gitdir-tweak'	2026-02-05 15:41:58 -08:00
rerere.c	…
rerere.h	…
reset.c	…
reset.h	…
resolve-undo.c	…
resolve-undo.h	…
revision.c	Merge branch 'ps/odb-for-each-object'	2026-03-02 17:06:50 -08:00
revision.h	revision: add --maximal-only option	2026-01-22 10:58:14 -08:00
run-command.c	Revert "Merge branch 'ar/run-command-hook'"	2026-01-15 13:02:38 -08:00
run-command.h	Revert "Merge branch 'ar/run-command-hook'"	2026-01-15 13:02:38 -08:00
sane-ctype.h	…
scalar.c	global: constify some pointers that are not written to	2026-02-05 17:52:49 -08:00
send-pack.c	…
send-pack.h	…
sequencer.c	Merge branch 'ps/commit-list-functions-renamed'	2026-02-13 13:39:25 -08:00
sequencer.h	…
serve.c	…
serve.h	…
server-info.c	…
server-info.h	…
setup.c	Merge branch 'rs/clean-includes'	2026-02-17 13:30:42 -08:00
setup.h	Merge branch 'ar/submodule-gitdir-tweak'	2026-02-05 15:41:58 -08:00
sh-i18n--envsubst.c	…
sha1dc_git.c	…
sha1dc_git.h	…
shallow.c	…
shallow.h	…
shared.mak	…
shell.c	…
shortlog.h	…
sideband.c	…
sideband.h	…
sigchain.c	…
sigchain.h	…
simple-ipc.h	…
sparse-index.c	…
sparse-index.h	…
split-index.c	…
split-index.h	…
stable-qsort.c	…
statinfo.c	…
statinfo.h	…
strbuf.c	global: constify some pointers that are not written to	2026-02-05 17:52:49 -08:00
strbuf.h	…
string-list.c	Merge branch 'cf/c23-const-preserving-strchr-updates-0'	2026-02-13 13:39:25 -08:00
string-list.h	string-list: add string_list_sort_u() that mimics "sort -u"	2026-01-29 09:32:50 -08:00
strmap.c	…
strmap.h	…
strvec.c	…
strvec.h	…
sub-process.c	…
sub-process.h	…
submodule-config.c	…
submodule-config.h	…
submodule.c	Merge branch 'ps/commit-list-functions-renamed'	2026-02-13 13:39:25 -08:00
submodule.h	…
symlinks.c	symlinks: use unsigned int for flags	2026-02-20 15:03:42 -08:00
symlinks.h	symlinks: use unsigned int for flags	2026-02-20 15:03:42 -08:00
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 'cc/lop-filter-auto'	2026-02-25 11:54:17 -08:00
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	…
unpack-trees.h	…
upload-pack.c	…
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-def.h.in	…
version.c	version: stop using the_repository	2026-02-08 15:16:49 -08:00
version.h	version: stop using the_repository	2026-02-08 15:16:49 -08:00
versioncmp.c	…
versioncmp.h	…
walker.c	…
walker.h	…
wildmatch.c	…
wildmatch.h	…
worktree.c	…
worktree.h	…
wrapper.c	global: constify some pointers that are not written to	2026-02-05 17:52:49 -08:00
wrapper.h	…
write-or-die.c	…
write-or-die.h	…
ws.c	…
ws.h	…
wt-status.c	…
wt-status.h	…
xdiff-interface.c	xdiff-interface: stop using the_repository	2026-02-10 08:16:14 -08:00
xdiff-interface.h	xdiff-interface: stop using the_repository	2026-02-10 08:16:14 -08:00

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.adoc to get started, then see Documentation/giteveryday.adoc for a useful minimum set of commands, and Documentation/git-<commandname>.adoc 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.adoc (man gitcvs-migration or git help cvs-migration if git is installed).

The user discussion and development of Git take place on the Git mailing list -- everyone is welcome to post bug reports, feature requests, comments and patches to git@vger.kernel.org (read Documentation/SubmittingPatches for instructions on patch submission and Documentation/CodingGuidelines).

Those wishing to help with error message, usage and informational message string translations (localization l10) should see po/README.md (a po file is a Portable Object file that holds the translations).

To subscribe to the list, send an email to git+subscribe@vger.kernel.org (see https://subspace.kernel.org/subscribing.html for details). The mailing list archives are available at https://lore.kernel.org/git/, https://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