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brian m. carlson 5f23aa6f0f t: allow specifying compatibility hash We want to specify a compatibility hash for testing interactions for SHA-256 repositories where we have SHA-1 compatibility enabled. Allow the user to specify this scenario in the test suite by setting GIT_TEST_DEFAULT_HASH to "sha256:sha1". Note that this will get passed into GIT_DEFAULT_HASH, which Git itself does not presently support. However, we will support this in a future commit. Since we'll now want to know the value for a specific version, let's add the ability to specify either the storage hash (in this case, SHA-256) or the compatibility hash (SHA-1). We use a different value for the compatibility hash that will be enabled for all repositories (test_repo_compat_hash_algo) versus the one that is used individually in some tests (test_compat_hash_algo), since we want to still run those individual tests without requiring that the testsuite be run fully in a compatibility mode. In some cases, we'll need to adjust our test suite to work in a proper way with a compatibility hash. For example, in such a case, we'll only use pack index v3, since v1 and v2 lack support for multiple algorithms. Since we won't want to write those older formats, we'll need to skip tests that do so. Let's add a COMPAT_HASH prerequisite for this purpose. Finally, in this scenario, we can no longer rely on having broken objects work since we lack compatibility mappings to rewrite objects in the repository. Add a prerequisite, BROKEN_OBJECTS, that we define in terms of COMPAT_HASH and checks to see if creating deliberately broken objects is possible, so that we can disable these tests if not. Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>		2025-10-09 17:46:15 -07:00
.github	…
Documentation	fsck: consider gpgsig headers expected in tags	2025-10-09 17:46:14 -07:00
bin-wrappers	…
block-sha1	…
builtin	rev-parse: allow printing compatibility hash	2025-10-09 17:46:14 -07:00
ci	Merge branch 'jc/ci-print-test-failures-fix'	2025-08-01 11:27:12 -07:00
compat	Merge branch 'js/mingw-fixes'	2025-08-04 08:10:34 -07:00
compiler-tricks	…
contrib	cmake: accommodate for `UNIT_TEST_SOURCES`	2025-08-17 09:12:53 -07:00
ewah	…
git-gui	Merge branch 'master' of https://github.com/j6t/git-gui	2025-08-04 11:45:23 -07:00
gitk-git	Merge branch 'master' of https://github.com/j6t/gitk	2025-08-04 11:44:30 -07:00
gitweb	…
mergetools	…
negotiator	…
oss-fuzz	…
perl	…
po	l10n: Update Catalan Translation for Git 2.51-rc2	2025-08-17 09:25:36 -04:00
refs	Merge branch 'ps/config-wo-the-repository'	2025-08-04 08:10:33 -07:00
reftable	…
sha1	…
sha1collisiondetection@855827c583	…
sha1dc	…
sha256	…
subprojects	…
t	t: allow specifying compatibility hash	2025-10-09 17:46:15 -07:00
templates	…
trace2	…
xdiff	…
.cirrus.yml	…
.clang-format	…
.editorconfig	…
.gitattributes	…
.gitignore	git-gui: honor TCLTK_PATH in git-gui--askpass	2025-07-31 18:42:54 +02:00
.gitlab-ci.yml	…
.gitmodules	…
.mailmap	…
.tsan-suppressions	…
CODE_OF_CONDUCT.md	…
COPYING	…
GIT-BUILD-OPTIONS.in	…
GIT-VERSION-FILE.in	…
GIT-VERSION-GEN	Git 2.51	2025-08-17 17:18:23 -07:00
INSTALL	…
LGPL-2.1	…
Makefile	Merge branch 'sk/reftable-clarify-tests'	2025-08-01 11:27:14 -07:00
README.md	…
RelNotes	…
SECURITY.md	…
abspath.c	…
abspath.h	…
aclocal.m4	…
add-interactive.c	add-patch: add diff.context command line overrides	2025-07-29 08:52:45 -07:00
add-interactive.h	add-patch: add diff.context command line overrides	2025-07-29 08:52:45 -07:00
add-patch.c	add-patch: add diff.context command line overrides	2025-07-29 08:52:45 -07:00
advice.c	…
advice.h	…
alias.c	…
alias.h	…
alloc.c	…
alloc.h	…
apply.c	Merge branch 'ps/object-file-wo-the-repository'	2025-08-05 11:53:55 -07:00
apply.h	…
archive-tar.c	…
archive-zip.c	archive: flush deflate stream until Z_STREAM_END	2025-08-04 13:36:35 -07:00
archive.c	config: drop `git_config_get_bool()` wrapper	2025-07-23 08:15:20 -07:00
archive.h	…
attr.c	…
attr.h	…
banned.h	…
base85.c	…
base85.h	…
bisect.c	…
bisect.h	…
blame.c	Merge branch 'ly/changed-paths-traversal'	2025-07-23 15:45:15 -07:00
blame.h	…
blob.c	…
blob.h	…
bloom.c	…
bloom.h	…
branch.c	config: drop `git_config_get_multivar_gently()` wrapper	2025-07-23 08:15:21 -07:00
branch.h	…
builtin.h	…
bulk-checkin.c	…
bulk-checkin.h	…
bundle-uri.c	…
bundle-uri.h	…
bundle.c	…
bundle.h	…
cache-tree.c	…
cache-tree.h	…
cbtree.c	…
cbtree.h	…
chdir-notify.c	…
chdir-notify.h	…
check-builtins.sh	…
checkout.c	config: drop `git_config_get_string()` wrapper	2025-07-23 08:15:19 -07:00
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	config: move Git config parsing into "environment.c"	2025-07-23 08:15:22 -07:00
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/object-file-wo-the-repository'	2025-08-05 11:53:55 -07:00
commit.h	Merge branch 'lm/add-p-context'	2025-08-04 08:10:33 -07:00
common-exit.c	…
common-init.c	…
common-init.h	…
common-main.c	…
config.c	Merge branch 'ps/config-wo-the-repository'	2025-08-04 08:10:33 -07:00
config.h	Merge branch 'ps/config-wo-the-repository'	2025-08-04 08:10:33 -07:00
config.mak.dev	…
config.mak.in	…
config.mak.uname	…
configure.ac	…
connect.c	config: drop `git_config_get_string()` wrapper	2025-07-23 08:15:19 -07:00
connect.h	…
connected.c	…
connected.h	…
convert.c	…
convert.h	…
copy.c	…
copy.h	…
credential.c	…
credential.h	…
csum-file.c	…
csum-file.h	…
ctype.c	…
daemon.c	Merge branch 'ps/config-wo-the-repository'	2025-08-04 08:10:33 -07:00
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	…
diff-merges.c	…
diff-merges.h	…
diff-no-index.c	…
diff.c	…
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	config: drop `git_config_set_in_file()` wrapper	2025-07-23 08:15:20 -07:00
dir.h	…
editor.c	config: drop `git_config_get_string()` wrapper	2025-07-23 08:15:19 -07:00
editor.h	…
entry.c	…
entry.h	…
environment.c	config: move Git config parsing into "environment.c"	2025-07-23 08:15:22 -07:00
environment.h	config: move Git config parsing into "environment.c"	2025-07-23 08:15:22 -07:00
exec-cmd.c	…
exec-cmd.h	…
fetch-negotiator.c	…
fetch-negotiator.h	…
fetch-pack.c	Merge branch 'ps/config-wo-the-repository'	2025-08-04 08:10:33 -07:00
fetch-pack.h	…
fmt-merge-msg.c	…
fmt-merge-msg.h	…
fsck.c	fsck: consider gpgsig headers expected in tags	2025-10-09 17:46:14 -07:00
fsck.h	fsck: consider gpgsig headers expected in tags	2025-10-09 17:46:14 -07:00
fsmonitor--daemon.h	…
fsmonitor-ipc.c	…
fsmonitor-ipc.h	…
fsmonitor-ll.h	…
fsmonitor-path-utils.h	…
fsmonitor-settings.c	…
fsmonitor-settings.h	…
fsmonitor.c	config: drop `git_config_get_int()` wrapper	2025-07-23 08:15:20 -07:00
fsmonitor.h	…
generate-cmdlist.sh	…
generate-configlist.sh	…
generate-hooklist.sh	…
generate-perl.sh	…
generate-python.sh	…
generate-script.sh	git-gui: honor TCLTK_PATH in git-gui--askpass	2025-07-31 18:42:54 +02:00
gettext.c	…
gettext.h	…
git-archimport.perl	…
git-compat-util.h	Merge branch 'pw/adopt-c99-bool-officially'	2025-07-24 16:03:55 -07:00
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: show alias info only with lone -h	2025-07-25 16:34:13 -07:00
git.rc.in	…
gpg-interface.c	Merge branch 'ps/config-wo-the-repository'	2025-08-04 08:10:33 -07:00
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	config: drop `git_config_get_string()` wrapper	2025-07-23 08:15:19 -07:00
help.h	…
hex-ll.c	…
hex-ll.h	…
hex.c	…
hex.h	…
hook.c	…
hook.h	…
http-backend.c	config: drop `git_config_get_bool()` wrapper	2025-07-23 08:15:20 -07:00
http-fetch.c	config: move Git config parsing into "environment.c"	2025-07-23 08:15:22 -07:00
http-push.c	…
http-walker.c	…
http.c	Merge branch 'ps/object-file-wo-the-repository'	2025-08-05 11:53:55 -07:00
http.h	…
ident.c	…
ident.h	…
imap-send.c	config: move Git config parsing into "environment.c"	2025-07-23 08:15:22 -07:00
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	config: drop `git_config_set()` wrapper	2025-07-23 08:15:21 -07:00
list-objects-filter-options.h	…
list-objects-filter.c	…
list-objects-filter.h	…
list-objects.c	…
list-objects.h	…
list.h	…
lockfile.c	…
lockfile.h	…
log-tree.c	…
log-tree.h	…
loose.c	…
loose.h	…
ls-refs.c	…
ls-refs.h	…
mailinfo.c	config: move Git config parsing into "environment.c"	2025-07-23 08:15:22 -07:00
mailinfo.h	…
mailmap.c	…
mailmap.h	…
match-trees.c	…
match-trees.h	…
mem-pool.c	…
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 'ps/object-file-wo-the-repository'	2025-08-05 11:53:55 -07:00
merge-ort.h	…
merge.c	…
merge.h	…
mergesort.h	…
meson.build	Merge branch 'ms/meson-with-ancient-git-wo-ls-files-dedup'	2025-08-04 08:10:35 -07:00
meson_options.txt	…
midx-write.c	Merge branch 'ps/object-file-wo-the-repository'	2025-08-05 11:53:55 -07:00
midx.c	…
midx.h	…
name-hash.c	…
name-hash.h	…
notes-cache.c	…
notes-cache.h	…
notes-merge.c	…
notes-merge.h	…
notes-utils.c	…
notes-utils.h	…
notes.c	Merge branch 'ps/object-file-wo-the-repository'	2025-08-05 11:53:55 -07:00
notes.h	…
object-file-convert.c	…
object-file-convert.h	…
object-file.c	…
object-file.h	…
object-name.c	Merge branch 'ps/object-store-midx'	2025-08-03 18:44:27 -07:00
object-name.h	…
object.c	…
object.h	…
odb.c	…
odb.h	Merge branch 'ps/object-file-wo-the-repository'	2025-08-05 11:53:55 -07:00
oid-array.c	…
oid-array.h	…
oidmap.c	…
oidmap.h	…
oidset.c	…
oidset.h	…
oidtree.c	…
oidtree.h	…
pack-bitmap-write.c	…
pack-bitmap.c	Merge branch 'ps/object-store-midx'	2025-08-03 18:44:27 -07:00
pack-bitmap.h	…
pack-check.c	…
pack-mtimes.c	…
pack-mtimes.h	…
pack-objects.c	…
pack-objects.h	…
pack-revindex.c	…
pack-revindex.h	…
pack-write.c	…
pack.h	…
packfile.c	…
packfile.h	…
pager.c	…
pager.h	…
parallel-checkout.c	config: drop `git_config_get_int()` wrapper	2025-07-23 08:15:20 -07:00
parallel-checkout.h	…
parse-options-cb.c	…
parse-options.c	…
parse-options.h	Merge branch 'lm/add-p-context'	2025-08-04 08:10:33 -07:00
parse.c	…
parse.h	…
patch-delta.c	…
patch-ids.c	…
patch-ids.h	…
path-walk.c	…
path-walk.h	…
path.c	…
path.h	…
pathspec.c	…
pathspec.h	…
pkt-line.c	…
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	config: drop `git_config_get_bool()` wrapper	2025-07-23 08:15:20 -07:00
promisor-remote.h	…
prompt.c	interactive: do strip trailing CRLF from input	2025-07-31 14:17:54 -07:00
prompt.h	…
protocol-caps.c	…
protocol-caps.h	…
protocol.c	config: drop `git_config_get_string()` wrapper	2025-07-23 08:15:19 -07:00
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	Merge branch 'ps/object-file-wo-the-repository'	2025-08-05 11:53:55 -07:00
reachable.h	…
read-cache-ll.h	…
read-cache.c	Merge branch 'ps/object-file-wo-the-repository'	2025-08-05 11:53:55 -07:00
read-cache.h	…
rebase-interactive.c	config: drop `git_config_get_value()` wrapper	2025-07-23 08:15:18 -07:00
rebase-interactive.h	…
rebase.c	…
rebase.h	…
ref-filter.c	Merge branch 'kn/for-each-ref-skip-updates'	2025-08-04 08:10:32 -07:00
ref-filter.h	…
reflog-walk.c	…
reflog-walk.h	…
reflog.c	Merge branch 'ps/config-wo-the-repository'	2025-08-04 08:10:33 -07:00
reflog.h	…
refs.c	Merge branch 'ps/config-wo-the-repository'	2025-08-04 08:10:33 -07:00
refs.h	Merge branch 'kn/for-each-ref-skip'	2025-08-03 18:44:26 -07:00
refspec.c	…
refspec.h	…
remote-curl.c	…
remote.c	config: drop `git_config_get_string()` wrapper	2025-07-23 08:15:19 -07:00
remote.h	…
replace-object.c	…
replace-object.h	…
repo-settings.c	…
repo-settings.h	…
repository.c	…
repository.h	…
rerere.c	config: move Git config parsing into "environment.c"	2025-07-23 08:15:22 -07:00
rerere.h	…
reset.c	…
reset.h	…
resolve-undo.c	…
resolve-undo.h	…
revision.c	Merge branch 'ps/config-wo-the-repository'	2025-08-04 08:10:33 -07:00
revision.h	Merge branch 'jk/revision-no-early-output'	2025-08-01 11:27:11 -07:00
run-command.c	config: drop `git_config_get_bool()` wrapper	2025-07-23 08:15:20 -07:00
run-command.h	…
sane-ctype.h	…
scalar.c	config: drop `git_config_get_multivar_gently()` wrapper	2025-07-23 08:15:21 -07:00
send-pack.c	…
send-pack.h	…
sequencer.c	config: drop `git_config_set_multivar_in_file_gently()` wrapper	2025-07-23 08:15:21 -07:00
sequencer.h	…
serve.c	…
serve.h	…
server-info.c	…
server-info.h	…
setup.c	config: drop `git_config_set()` wrapper	2025-07-23 08:15:21 -07:00
setup.h	…
sh-i18n--envsubst.c	…
sha1dc_git.c	…
sha1dc_git.h	…
shallow.c	…
shallow.h	…
shared.mak	…
shell.c	…
shortlog.h	…
sideband.c	config: drop `git_config_get_string()` wrapper	2025-07-23 08:15:19 -07:00
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	…
strbuf.h	…
streaming.c	…
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	config: drop `git_config_set_in_file_gently()` wrapper	2025-07-23 08:15:21 -07:00
submodule-config.h	…
submodule.c	config: drop `git_config_set_in_file_gently()` wrapper	2025-07-23 08:15:21 -07:00
submodule.h	…
symlinks.c	…
symlinks.h	…
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	config: drop `git_config_get_bool()` wrapper	2025-07-23 08:15:20 -07:00
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.h	…
versioncmp.c	config: drop `git_config_get_string_multi()` wrapper	2025-07-23 08:15:19 -07:00
versioncmp.h	…
walker.c	Merge branch 'rs/pop-recent-commit-with-prio-queue'	2025-07-28 12:02:34 -07:00
walker.h	…
wildmatch.c	…
wildmatch.h	…
worktree.c	config: drop `git_config_set_in_file_gently()` wrapper	2025-07-23 08:15:21 -07:00
worktree.h	…
wrapper.c	…
wrapper.h	…
write-or-die.c	…
write-or-die.h	…
ws.c	…
ws.h	…
wt-status.c	…
wt-status.h	…
xdiff-interface.c	config: move Git config parsing into "environment.c"	2025-07-23 08:15:22 -07:00
xdiff-interface.h	…

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