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Jeff King 65a6a79b42 hash-object: stop allowing unknown types
When passed the "--literally" option, hash-object will allow any
arbitrary string for its "-t" type option. Such objects are only useful
for testing or debugging, as they cannot be used in the normal way
(e.g., you cannot fetch their contents!).

Let's drop this feature, which will eventually let us simplify the
object-writing code. This is technically backwards incompatible, but
since such objects were never really functional, it seems unlikely that
anybody will notice.

We will retain the --literally flag, as it also instructs hash-object
not to worry about other format issues (e.g., type-specific things that
fsck would complain about). The documentation does not need to be
updated, as it was always vague about which checks we're loosening (it
uses only the phrase "any garbage").

The code change is a bit hard to verify from just the patch text. We can
drop our local hash_literally() helper, but it was really just wrapping
write_object_file_literally(). We now replace that with calling
index_fd(), as we do for the non-literal code path, but dropping the
INDEX_FORMAT_CHECK flag. This ends up being the same semantically as
what the _literally() code path was doing (modulo handling unknown
types, which is our goal).

We'll be able to clean up these code paths a bit more in subsequent
patches.

The existing test is flipped to show that we now reject the unknown
type. The additional "extra-long type" test is now redundant, as we bail
early upon seeing a bogus type.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2025-05-16 09:43:11 -07:00
.github Merge branch 'kn/meson-hdr-check' 2025-05-05 14:56:25 -07:00
Documentation cat-file: make --allow-unknown-type a noop 2025-05-16 09:43:09 -07:00
bin-wrappers
block-sha1
builtin hash-object: stop allowing unknown types 2025-05-16 09:43:11 -07:00
ci Merge branch 'js/ci-buildsystems-cleanup' 2025-05-13 14:05:06 -07:00
compat Merge branch 'js/windows-arm64' 2025-05-05 14:56:24 -07:00
compiler-tricks intialize false_but_the_compiler_does_not_know_it_ 2025-05-07 09:11:47 -07:00
contrib Merge branch 'js/ci-buildsystems-cleanup' 2025-05-13 14:05:06 -07:00
ewah
git-gui Merge branch 'master' of https://github.com/j6t/git-gui 2025-05-09 13:14:36 -07:00
gitk-git Merge branch 'master' of https://github.com/j6t/gitk 2025-05-09 13:16:51 -07:00
gitweb meson: distinguish build and target host binaries 2025-04-01 02:20:44 -07:00
mergetools Merge branch 'fr/vimdiff-layout-fixes' 2025-04-08 11:43:16 -07:00
negotiator
oss-fuzz object-store: merge "object-store-ll.h" and "object-store.h" 2025-04-15 08:24:37 -07:00
perl meson: allow customize perl installation path 2025-05-08 07:29:37 -07:00
po Merge branch 'js/po-update-workflow' 2025-05-09 19:17:19 +02:00
refs Merge branch 'ps/object-file-cleanup' 2025-04-24 17:25:33 -07:00
reftable Merge branch 'ps/reftable-api-revamp' 2025-04-29 14:21:30 -07:00
sha1
sha1collisiondetection@855827c583
sha1dc
sha256
subprojects
t hash-object: stop allowing unknown types 2025-05-16 09:43:11 -07:00
templates meson: distinguish build and target host binaries 2025-04-01 02:20:44 -07:00
trace2
xdiff xdiff: disable cleanup_records heuristic with --minimal 2025-04-29 12:46:58 -07:00
.cirrus.yml
.clang-format
.editorconfig
.gitattributes
.gitignore
.gitlab-ci.yml ci: use Visual Studio for win+meson job on GitHub Workflows 2025-04-01 02:20:44 -07:00
.gitmodules
.mailmap
.tsan-suppressions
CODE_OF_CONDUCT.md
COPYING
GIT-BUILD-OPTIONS.in
GIT-VERSION-FILE.in
GIT-VERSION-GEN
INSTALL
LGPL-2.1
Makefile t/helper: add zlib test-tool 2025-05-16 09:43:11 -07:00
README.md
RelNotes
SECURITY.md
abspath.c
abspath.h
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 'ps/parse-options-integers' 2025-04-24 17:25:34 -07:00
apply.h
archive-tar.c object-store: merge "object-store-ll.h" and "object-store.h" 2025-04-15 08:24:37 -07:00
archive-zip.c object-store: merge "object-store-ll.h" and "object-store.h" 2025-04-15 08:24:37 -07:00
archive.c Merge branch 'ps/parse-options-integers' 2025-04-24 17:25:34 -07:00
archive.h
attr.c object-store: merge "object-store-ll.h" and "object-store.h" 2025-04-15 08:24:37 -07:00
attr.h
banned.h
base85.c
base85.h
bisect.c object-store: merge "object-store-ll.h" and "object-store.h" 2025-04-15 08:24:37 -07:00
bisect.h
blame.c object-store: merge "object-store-ll.h" and "object-store.h" 2025-04-15 08:24:37 -07:00
blame.h
blob.c
blob.h
bloom.c
bloom.h
branch.c
branch.h
builtin.h
bulk-checkin.c treewide: convert users of `repo_has_object_file()` to `has_object()` 2025-04-29 10:08:13 -07:00
bulk-checkin.h object-file: drop `index_blob_stream()` 2025-04-15 08:24:36 -07:00
bundle-uri.c object-store: merge "object-store-ll.h" and "object-store.h" 2025-04-15 08:24:37 -07:00
bundle-uri.h
bundle.c Merge branch 'ps/object-file-cleanup' 2025-04-24 17:25:33 -07:00
bundle.h
cache-tree.c treewide: convert users of `repo_has_object_file()` to `has_object()` 2025-04-29 10:08:13 -07:00
cache-tree.h
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 object-store: merge "object-store-ll.h" and "object-store.h" 2025-04-15 08:24:37 -07:00
command-list.txt
commit-graph.c object-store: merge "object-store-ll.h" and "object-store.h" 2025-04-15 08:24:37 -07:00
commit-graph.h object-store: merge "object-store-ll.h" and "object-store.h" 2025-04-15 08:24:37 -07:00
commit-reach.c
commit-reach.h
commit-slab-decl.h
commit-slab-impl.h
commit-slab.h
commit.c Merge branch 'ps/object-file-cleanup' 2025-04-24 17:25:33 -07:00
commit.h
common-exit.c
common-init.c
common-init.h
common-main.c
config.c Merge branch 'ps/object-wo-the-repository' 2025-04-15 13:50:15 -07:00
config.h
config.mak.dev Merge branch 'js/comma-semicolon-confusion' 2025-04-15 13:50:17 -07:00
config.mak.in
config.mak.uname Merge branch 'js/ci-buildsystems-cleanup' 2025-05-13 14:05:06 -07:00
configure.ac config.mak.uname: add sysinfo() configuration for cygwin 2025-04-16 20:43:45 -07:00
connect.c
connect.h
connected.c object-store: merge "object-store-ll.h" and "object-store.h" 2025-04-15 08:24:37 -07:00
connected.h
convert.c object-store: move function declarations to their respective subsystems 2025-04-29 10:08:12 -07:00
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 object-store: merge "object-store-ll.h" and "object-store.h" 2025-04-15 08:24:37 -07:00
diagnose.h
diff-delta.c
diff-lib.c
diff-merges.c
diff-merges.h
diff-no-index.c
diff.c Merge branch 'js/diff-codeql-false-positive-workaround' 2025-05-08 12:36:32 -07:00
diff.h Merge branch 'ps/object-wo-the-repository' 2025-04-15 13:50:15 -07:00
diffcore-break.c
diffcore-delta.c
diffcore-order.c
diffcore-pickaxe.c
diffcore-rename.c object-store: move function declarations to their respective subsystems 2025-04-29 10:08:12 -07:00
diffcore-rotate.c
diffcore.h
dir-iterator.c
dir-iterator.h
dir.c Merge branch 'kj/glob-path-with-special-char' 2025-05-13 14:05:07 -07:00
dir.h
editor.c
editor.h
entry.c object-store: merge "object-store-ll.h" and "object-store.h" 2025-04-15 08:24:37 -07:00
entry.h
environment.c Merge branch 'js/windows-arm64' 2025-05-05 14:56:24 -07:00
environment.h Merge branch 'ab/environment-clean-header' 2025-04-17 10:28:20 -07:00
exec-cmd.c
exec-cmd.h
fetch-negotiator.c
fetch-negotiator.h
fetch-pack.c treewide: convert users of `repo_has_object_file()` to `has_object()` 2025-04-29 10:08:13 -07:00
fetch-pack.h
fmt-merge-msg.c object-store: merge "object-store-ll.h" and "object-store.h" 2025-04-15 08:24:37 -07:00
fmt-merge-msg.h
fsck.c object-store: merge "object-store-ll.h" and "object-store.h" 2025-04-15 08:24:37 -07:00
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 Merge branch 'ps/parse-options-integers' 2025-04-24 17:25:34 -07:00
git-curl-compat.h
git-cvsexportcommit.perl
git-cvsimport.perl
git-cvsserver.perl
git-difftool--helper.sh
git-filter-branch.sh filter-branch: stop depending on Perl 2025-04-16 07:30:29 -07:00
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 request-pull: stop depending on Perl 2025-04-16 07:30:29 -07:00
git-send-email.perl send-email: add --[no-]outlook-id-fix option 2025-04-29 10:06:52 -07:00
git-sh-i18n.sh
git-sh-setup.sh
git-submodule.sh
git-svn.perl
git-web--browse.sh
git-zlib.c Merge branch 'jk/zlib-inflate-fixes' 2025-04-15 13:50:14 -07:00
git-zlib.h git-zlib: use `struct z_stream_s` instead of typedef 2025-04-07 14:53:11 -07:00
git.c
git.rc.in
gpg-interface.c
gpg-interface.h
graph.c
graph.h
grep.c object-store: merge "object-store-ll.h" and "object-store.h" 2025-04-15 08:24:37 -07:00
grep.h
hash-lookup.c
hash-lookup.h
hash.c
hash.h Merge branch 'jt/help-sha-backend-info-in-build-options' 2025-04-16 13:54:20 -07:00
hashmap.c Merge branch 'en/hashmap-clear-fix' 2025-05-08 12:36:31 -07:00
hashmap.h
help.c help: include unsafe SHA-1 build info in version 2025-04-07 14:39:27 -07:00
help.h
hex-ll.c
hex-ll.h
hex.c
hex.h
hook.c
hook.h
http-backend.c object-store: merge "object-store-ll.h" and "object-store.h" 2025-04-15 08:24:37 -07:00
http-fetch.c
http-push.c treewide: convert users of `repo_has_object_file()` to `has_object()` 2025-04-29 10:08:13 -07:00
http-walker.c treewide: convert users of `repo_has_object_file()` to `has_object()` 2025-04-29 10:08:13 -07:00
http.c object-store: drop `loose_object_path()` 2025-04-29 10:08:12 -07:00
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.h
list-objects-filter.c object-store: merge "object-store-ll.h" and "object-store.h" 2025-04-15 08:24:37 -07:00
list-objects-filter.h
list-objects.c treewide: convert users of `repo_has_object_file()` to `has_object()` 2025-04-29 10:08:13 -07:00
list-objects.h
list.h
lockfile.c
lockfile.h
log-tree.c object-store: move function declarations to their respective subsystems 2025-04-29 10:08:12 -07:00
log-tree.h
loose.c
loose.h
ls-refs.c
ls-refs.h
mailinfo.c
mailinfo.h
mailmap.c object-store: merge "object-store-ll.h" and "object-store.h" 2025-04-15 08:24:37 -07:00
mailmap.h
match-trees.c object-file: split out functions relating to object store subsystem 2025-04-15 08:24:36 -07:00
match-trees.h
mem-pool.c
mem-pool.h
merge-blobs.c object-store: merge "object-store-ll.h" and "object-store.h" 2025-04-15 08:24:37 -07:00
merge-blobs.h
merge-ll.c
merge-ll.h
merge-ort-wrappers.c
merge-ort-wrappers.h merge-recursive.[ch]: thoroughly debug these 2025-04-08 13:59:13 -07:00
merge-ort.c Merge branch 'ps/object-file-cleanup' 2025-04-24 17:25:33 -07:00
merge-ort.h merge-recursive.[ch]: thoroughly debug these 2025-04-08 13:59:13 -07:00
merge.c
merge.h
mergesort.h
meson.build Merge branch 'dd/meson-perl-custom-path' 2025-05-15 17:24:56 -07:00
meson_options.txt Merge branch 'dd/meson-perl-custom-path' 2025-05-15 17:24:56 -07:00
midx-write.c Merge branch 'ps/object-file-cleanup' 2025-04-24 17:25:33 -07:00
midx.c object-file: move `git_open_cloexec()` to "compat/open.c" 2025-04-15 08:24:35 -07:00
midx.h
name-hash.c
name-hash.h
notes-cache.c object-file: split out functions relating to object store subsystem 2025-04-15 08:24:36 -07:00
notes-cache.h
notes-merge.c object-store: merge "object-store-ll.h" and "object-store.h" 2025-04-15 08:24:37 -07:00
notes-merge.h
notes-utils.c
notes-utils.h
notes.c treewide: convert users of `repo_has_object_file()` to `has_object()` 2025-04-29 10:08:13 -07:00
notes.h
object-file-convert.c
object-file-convert.h
object-file.c oid_object_info(): drop type_name strbuf 2025-05-16 09:43:10 -07:00
object-file.h object-file: drop OBJECT_INFO_ALLOW_UNKNOWN_TYPE flag 2025-05-16 09:43:10 -07:00
object-name.c object-store: move function declarations to their respective subsystems 2025-04-29 10:08:12 -07:00
object-name.h
object-store.c oid_object_info(): drop type_name strbuf 2025-05-16 09:43:10 -07:00
object-store.h oid_object_info(): drop type_name strbuf 2025-05-16 09:43:10 -07:00
object.c Merge branch 'ps/object-file-cleanup' 2025-04-24 17:25:33 -07:00
object.h Merge branch 'kn/bundle-dedup-optim' 2025-04-23 13:58:50 -07:00
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/object-file-cleanup' 2025-04-24 17:25:33 -07:00
pack-bitmap.c Merge branch 'ps/object-file-cleanup' 2025-04-24 17:25:33 -07:00
pack-bitmap.h Merge branch 'ps/cat-file-filter-batch' 2025-04-16 13:54:21 -07:00
pack-check.c object-store: merge "object-store-ll.h" and "object-store.h" 2025-04-15 08:24:37 -07:00
pack-mtimes.c object-store: merge "object-store-ll.h" and "object-store.h" 2025-04-15 08:24:37 -07:00
pack-mtimes.h
pack-objects.c
pack-objects.h object-store: move `struct packed_git` into "packfile.h" 2025-04-29 10:08:11 -07:00
pack-revindex.c Merge branch 'ps/object-file-cleanup' 2025-04-24 17:25:33 -07:00
pack-revindex.h
pack-write.c
pack.h
packfile.c oid_object_info(): drop type_name strbuf 2025-05-16 09:43:10 -07:00
packfile.h object-store: move function declarations to their respective subsystems 2025-04-29 10:08:12 -07:00
pager.c
pager.h
parallel-checkout.c
parallel-checkout.h
parse-options-cb.c
parse-options.c parse-options: introduce precision handling for `OPTION_UNSIGNED` 2025-04-17 08:15:16 -07:00
parse-options.h parse-options: detect mismatches in integer signedness 2025-04-17 08:15:16 -07:00
parse.c parse-options: introduce precision handling for `OPTION_UNSIGNED` 2025-04-17 08:15:16 -07:00
parse.h parse-options: introduce precision handling for `OPTION_UNSIGNED` 2025-04-17 08:15:16 -07:00
patch-delta.c
patch-ids.c
patch-ids.h
path-walk.c
path-walk.h
path.c object-store: move and rename `odb_pack_keep()` 2025-04-29 10:08:12 -07:00
path.h object-store: move and rename `odb_pack_keep()` 2025-04-29 10:08:12 -07:00
pathspec.c pathspec: fix sign comparison warnings 2025-04-01 02:51:47 -07:00
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 object-store: merge "object-store-ll.h" and "object-store.h" 2025-04-15 08:24:37 -07:00
promisor-remote.h
prompt.c
prompt.h
protocol-caps.c object-store: merge "object-store-ll.h" and "object-store.h" 2025-04-15 08:24:37 -07:00
protocol-caps.h
protocol.c
protocol.h
prune-packed.c object-store: move function declarations to their respective subsystems 2025-04-29 10:08:12 -07:00
prune-packed.h
pseudo-merge.c
pseudo-merge.h Merge branch 'tb/bitamp-typofix' 2025-04-07 14:23:20 -07:00
quote.c
quote.h
range-diff.c
range-diff.h
reachable.c object-store: move function declarations to their respective subsystems 2025-04-29 10:08:12 -07:00
reachable.h
read-cache-ll.h
read-cache.c Merge branch 'ps/object-file-cleanup' 2025-04-24 17:25:33 -07:00
read-cache.h
rebase-interactive.c
rebase-interactive.h
rebase.c
rebase.h
ref-filter.c object-store: merge "object-store-ll.h" and "object-store.h" 2025-04-15 08:24:37 -07:00
ref-filter.h global: use designated initializers for options 2025-04-17 08:15:15 -07:00
reflog-walk.c
reflog-walk.h
reflog.c treewide: convert users of `repo_has_object_file()` to `has_object()` 2025-04-29 10:08:13 -07:00
reflog.h builtin/reflog: make functions regarding `reflog_expire_options` public 2025-04-08 07:53:27 -07:00
refs.c treewide: convert users of `repo_has_object_file()` to `has_object()` 2025-04-29 10:08:13 -07:00
refs.h Merge branch 'kn/non-transactional-batch-updates' 2025-04-16 13:54:19 -07:00
refspec.c
refspec.h
remote-curl.c
remote.c treewide: convert users of `repo_has_object_file()` to `has_object()` 2025-04-29 10:08:13 -07:00
remote.h
replace-object.c object-store: merge "object-store-ll.h" and "object-store.h" 2025-04-15 08:24:37 -07:00
replace-object.h object-store: merge "object-store-ll.h" and "object-store.h" 2025-04-15 08:24:37 -07:00
repo-settings.c
repo-settings.h
repository.c object-store: merge "object-store-ll.h" and "object-store.h" 2025-04-15 08:24:37 -07:00
repository.h
rerere.c object-store: merge "object-store-ll.h" and "object-store.h" 2025-04-15 08:24:37 -07:00
rerere.h
reset.c
reset.h
resolve-undo.c
resolve-undo.h
revision.c Merge branch 'ps/object-file-cleanup' 2025-04-24 17:25:33 -07:00
revision.h Merge branch 'lo/remove-log-reencode-from-rev-info' 2025-04-29 14:21:31 -07:00
run-command.c
run-command.h
sane-ctype.h
scalar.c
send-pack.c treewide: convert users of `repo_has_object_file()` to `has_object()` 2025-04-29 10:08:13 -07:00
send-pack.h
sequencer.c Merge branch 'ps/object-file-cleanup' 2025-04-24 17:25:33 -07:00
sequencer.h
serve.c
serve.h
server-info.c object-store: merge "object-store-ll.h" and "object-store.h" 2025-04-15 08:24:37 -07:00
server-info.h
setup.c
setup.h
sh-i18n--envsubst.c
sha1dc_git.c
sha1dc_git.h
shallow.c treewide: convert users of `repo_has_object_file()` to `has_object()` 2025-04-29 10:08:13 -07:00
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
strbuf.h
streaming.c object-file: drop OBJECT_INFO_ALLOW_UNKNOWN_TYPE flag 2025-05-16 09:43:10 -07:00
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 object-store: merge "object-store-ll.h" and "object-store.h" 2025-04-15 08:24:37 -07:00
submodule-config.h
submodule.c object-store: merge "object-store-ll.h" and "object-store.h" 2025-04-15 08:24:37 -07:00
submodule.h
symlinks.c
symlinks.h
tag.c object-store: merge "object-store-ll.h" and "object-store.h" 2025-04-15 08:24:37 -07:00
tag.h
tar.h
tempfile.c
tempfile.h
thread-utils.c
thread-utils.h
tmp-objdir.c object-store: merge "object-store-ll.h" and "object-store.h" 2025-04-15 08:24:37 -07:00
tmp-objdir.h
trace.c
trace.h
trace2.c
trace2.h
trailer.c
trailer.h
transport-helper.c
transport-internal.h
transport.c
transport.h
tree-diff.c
tree-walk.c object-store: merge "object-store-ll.h" and "object-store.h" 2025-04-15 08:24:37 -07:00
tree-walk.h tree-walk.h: fix incorrect API comment 2025-05-02 12:44:04 -07:00
tree.c object-store: merge "object-store-ll.h" and "object-store.h" 2025-04-15 08:24:37 -07:00
tree.h
unicode-width.h
unimplemented.sh
unix-socket.c
unix-socket.h
unix-stream-server.c
unix-stream-server.h
unpack-trees.c object-store: merge "object-store-ll.h" and "object-store.h" 2025-04-15 08:24:37 -07:00
unpack-trees.h
upload-pack.c treewide: convert users of `repo_has_object_file()` to `has_object()` 2025-04-29 10:08:13 -07:00
upload-pack.h
url.c
url.h
urlmatch.c
urlmatch.h
usage.c
userdiff.c userdiff: add builtin driver for INI files 2025-04-01 03:02:09 -07:00
userdiff.h
utf8.c
utf8.h
varint.c
varint.h
version-def.h.in
version.c
version.h
versioncmp.c
versioncmp.h
walker.c treewide: convert users of `repo_has_object_file()` to `has_object()` 2025-04-29 10:08:13 -07:00
walker.h
wildmatch.c
wildmatch.h
worktree.c
worktree.h
wrapper.c Merge branch 'cf/wrapper-bsd-eloop' 2025-05-15 17:24:55 -07:00
wrapper.h
write-or-die.c
write-or-die.h
ws.c
ws.h
wt-status.c
wt-status.h
xdiff-interface.c object-store: merge "object-store-ll.h" and "object-store.h" 2025-04-15 08:24:37 -07:00
xdiff-interface.h

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.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