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Patrick Steinhardt c8aed5e8da repository: stop setting SHA1 as the default object hash 
During the startup of Git, we call `initialize_the_repository()` to set
up `the_repository` as well as `the_index`. Part of this setup is also
to set the default object hash of the repository to SHA1. This has the
effect that `the_hash_algo` is getting initialized to SHA1, as well.
This default hash algorithm eventually gets overridden by most Git
commands via `setup_git_directory()`, which also detects the actual hash
algorithm used by the repository.

There are some commands though that don't access a repository at all, or
at a later point only, and thus retain the default hash function for
some amount of time. As some of the the preceding commits demonstrate,
this can lead to subtle issues when we access `the_hash_algo` when no
repository has been set up.

Address this issue by dropping the set up of the default hash algorithm
completely. The effect of this is that `the_hash_algo` will map to a
`NULL` pointer and thus cause Git to crash when something tries to
access the hash algorithm without it being properly initialized. It thus
forces all Git commands to explicitly set up the hash algorithm in case
there is no repository.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2024-05-06 22:50:50 -07:00
.github Merge branch 'pb/ci-win-artifact-names-fix' 2024-03-21 14:55:13 -07:00
block-sha1
builtin builtin/shortlog: don't set up revisions without repo 2024-05-06 22:50:50 -07:00
ci fuzz: link fuzz programs with make all on Linux 2024-04-24 11:56:40 -07:00
compat Win32: detect unix socket support at runtime 2024-04-03 14:54:28 -07:00
contrib Merge branch 'ba/osxkeychain-updates' 2024-04-16 14:50:30 -07:00
Documentation Start the 2.46 cycle 2024-04-30 14:52:20 -07:00
ewah
git-gui Makefile(s): do not enforce "all indents must be done with tab" 2024-04-08 16:36:05 -07:00
gitk-git Makefile(s): avoid recipe prefix in conditional statements 2024-04-08 14:42:32 -07:00
gitweb
mergetools
negotiator
oss-fuzz oss-fuzz/commit-graph: set up hash algorithm 2024-05-06 22:50:50 -07:00
perl
po Merge branch 'master' of github.com:alshopov/git-po 2024-04-29 14:50:23 +08:00
refs Merge branch 'ps/pack-refs-auto' 2024-04-09 14:31:45 -07:00
reftable Merge branch 'ps/reftable-block-iteration-optim' 2024-04-23 11:52:37 -07:00
sha1
sha1collisiondetection@855827c583
sha1dc
sha256
t builtin/rev-parse: allow shortening to more than 40 hex characters 2024-05-06 22:50:49 -07:00
templates
trace2
xdiff
.cirrus.yml
.clang-format
.editorconfig editorconfig: add Makefiles to "text files" 2024-03-23 11:42:31 -07:00
.gitattributes
.gitignore
.gitlab-ci.yml
.gitmodules
.mailmap mailmap: change primary address for Linus Arver 2024-04-16 22:25:11 -07:00
.tsan-suppressions
abspath.c
abspath.h
aclocal.m4
add-interactive.c add-interactive: plug a leak in get_untracked_files 2024-04-22 16:27:42 -07:00
add-interactive.h
add-patch.c add-patch: plug a leak handling the '/' command 2024-04-22 16:27:42 -07:00
advice.c Merge branch 'jc/advice-sans-trailing-whitespace' 2024-04-09 14:31:43 -07:00
advice.h sequencer: allow disabling conflict advice 2024-03-18 09:28:40 -07:00
alias.c
alias.h
alloc.c
alloc.h
apply.c Merge branch 'rj/add-i-leak-fix' 2024-04-25 10:34:24 -07:00
apply.h
archive-tar.c
archive-zip.c
archive.c Merge branch 'eb/hash-transition' 2024-03-28 14:13:50 -07:00
archive.h
attr.c attr: fix BUG() when parsing attrs outside of repo 2024-05-06 22:50:49 -07:00
attr.h
banned.h
base85.c
base85.h
bisect.c bisect: report the found commit with "show" 2024-04-15 11:29:09 -07:00
bisect.h
blame.c
blame.h
blob.c
blob.h
bloom.c
bloom.h
branch.c Merge branch 'pf/commitish-committish' 2024-04-19 09:13:47 -07:00
branch.h typo: replace 'commitish' with 'committish' 2024-04-11 15:14:56 -07:00
builtin.h
bulk-checkin.c
bulk-checkin.h
bundle-uri.c
bundle-uri.h
bundle.c
bundle.h
cache-tree.c Merge branch 'eb/hash-transition' 2024-03-28 14:13:50 -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
CODE_OF_CONDUCT.md
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 Merge branch 'jk/core-comment-string' 2024-04-05 10:49:49 -07:00
commit.h Merge branch 'eb/hash-transition' 2024-03-28 14:13:50 -07:00
common-main.c repository: drop initialize_the_repository() 2024-04-18 12:30:43 -07:00
config.c Merge branch 'jc/unleak-core-excludesfile' 2024-04-15 14:11:44 -07:00
config.h config: allow tweaking whitespace between value and comment 2024-03-15 16:07:39 -07:00
config.mak.dev
config.mak.in
config.mak.uname Merge branch 'js/build-fuzz-more-often' 2024-04-30 14:49:44 -07:00
configure.ac
connect.c
connect.h
connected.c
connected.h
convert.c
convert.h
copy.c
copy.h
COPYING
credential.c
credential.h
csum-file.c
csum-file.h
ctype.c
daemon.c
date.c date: make DATE_MODE thread-safe 2024-04-05 15:21:14 -07:00
date.h date: make DATE_MODE thread-safe 2024-04-05 15:21:14 -07:00
decorate.c
decorate.h
delta-islands.c Merge branch 'eb/hash-transition' 2024-03-28 14:13:50 -07:00
delta-islands.h
delta.h
detect-compiler
diagnose.c
diagnose.h
diff-delta.c
diff-lib.c revision: optionally record matches with pathspec elements 2024-04-03 14:55:21 -07:00
diff-merges.c
diff-merges.h
diff-no-index.c
diff.c diff: add diff.srcPrefix and diff.dstPrefix configuration variables 2024-03-15 10:04:45 -07:00
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
dir.h
editor.c launch_editor: waiting message on error 2024-04-15 10:13:32 -07:00
editor.h
entry.c
entry.h
environment.c Merge branch 'jk/core-comment-string' 2024-04-05 10:49:49 -07:00
environment.h Merge branch 'jk/core-comment-string' 2024-04-05 10:49:49 -07:00
exec-cmd.c
exec-cmd.h
fetch-negotiator.c
fetch-negotiator.h
fetch-pack.c
fetch-pack.h
fmt-merge-msg.c prefer comment_line_str to comment_line_char for printing 2024-03-12 13:28:10 -07:00
fmt-merge-msg.h
fsck.c Merge branch 'eb/hash-transition' 2024-03-28 14:13:50 -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: support case-insensitive events 2024-03-06 09:10:06 -08:00
fsmonitor.h
generate-cmdlist.sh
generate-configlist.sh
generate-hooklist.sh
gettext.c
gettext.h
git-archimport.perl
git-compat-util.h Merge branch 'rs/no-openssl-compilation-fix-on-macos' 2024-04-23 11:52:38 -07:00
git-curl-compat.h remote-curl: add Transfer-Encoding header only for older curl 2024-04-05 14:45:19 -07:00
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-quiltimport: avoid an unnecessary subshell 2024-03-16 11:08:57 -07:00
git-request-pull.sh
git-send-email.perl
git-sh-i18n.sh
git-sh-setup.sh
git-submodule.sh
git-svn.perl
GIT-VERSION-GEN Start the 2.46 cycle 2024-04-30 14:52:20 -07:00
git-web--browse.sh
git-zlib.c
git-zlib.h
git.c Merge branch 'jh/trace2-missing-def-param-fix' 2024-03-18 13:04:25 -07:00
git.rc
gpg-interface.c Merge branch 'rs/date-mode-pass-by-value' 2024-04-16 14:50:29 -07:00
gpg-interface.h
graph.c
graph.h
grep.c grep: improve errors for unmatched ( and ) 2024-03-25 11:40:53 -07:00
grep.h
hash-ll.h
hash-lookup.c
hash-lookup.h
hash.h
hashmap.c
hashmap.h
help.c
help.h
hex-ll.c
hex-ll.h
hex.c
hex.h
hook.c
hook.h
http-backend.c
http-fetch.c
http-push.c Merge branch 'eb/hash-transition' 2024-03-28 14:13:50 -07:00
http-walker.c
http.c http: reset POSTFIELDSIZE when clearing curl handle 2024-04-02 13:27:18 -07:00
http.h
ident.c
ident.h
imap-send.c imap-send: increase command size limit 2024-04-15 11:34:17 -07:00
INSTALL INSTALL: bump libcurl version to 7.21.3 2024-04-02 13:27:20 -07:00
iterator.h
json-writer.c
json-writer.h
khash.h
kwset.c
kwset.h
levenshtein.c
levenshtein.h
LGPL-2.1
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 Merge branch 'eb/hash-transition' 2024-03-28 14:13:50 -07:00
list-objects.h
list.h
lockfile.c
lockfile.h lockfile: report when rollback fails 2024-03-07 12:34:13 -08:00
log-tree.c Merge branch 'rs/date-mode-pass-by-value' 2024-04-16 14:50:29 -07:00
log-tree.h format-patch: return an allocated string from log_write_email_headers() 2024-03-19 17:54:16 -07:00
loose.c
loose.h
ls-refs.c
ls-refs.h
mailinfo.c
mailinfo.h
mailmap.c
mailmap.h
Makefile Merge branch 'js/build-fuzz-more-often' 2024-04-30 14:49:44 -07:00
match-trees.c
match-trees.h
mem-pool.c don't report vsnprintf(3) error as bug 2024-04-21 12:27:07 -07:00
mem-pool.h
merge-blobs.c
merge-blobs.h
merge-ll.c Merge branch 'pw/checkout-conflict-errorfix' 2024-04-01 13:21:33 -07:00
merge-ll.h merge options: add a conflict style member 2024-03-14 10:08:52 -07:00
merge-ort-wrappers.c
merge-ort-wrappers.h
merge-ort.c Merge branch 'pw/checkout-conflict-errorfix' 2024-04-01 13:21:33 -07:00
merge-ort.h
merge-recursive.c Merge branch 'pw/checkout-conflict-errorfix' 2024-04-01 13:21:33 -07:00
merge-recursive.h merge options: add a conflict style member 2024-03-14 10:08:52 -07:00
merge.c Merge branch 'eb/hash-transition' 2024-03-28 14:13:50 -07:00
merge.h
mergesort.h
midx-write.c midx-write.c: use --stdin-packs when repacking 2024-04-01 14:18:17 -07:00
midx.c Merge branch 'ps/missing-btmp-fix' 2024-04-23 11:52:40 -07:00
midx.h midx-write: move writing-related functions from midx.c 2024-04-01 14:18:16 -07:00
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
notes.h
object-file-convert.c
object-file-convert.h
object-file.c Merge branch 'eb/hash-transition' 2024-03-28 14:13:50 -07:00
object-file.h
object-name.c Merge branch 'eb/hash-transition' 2024-03-28 14:13:50 -07:00
object-name.h
object-store-ll.h
object-store.h
object.c Merge branch 'eb/hash-transition' 2024-03-28 14:13:50 -07:00
object.h Merge branch 'eb/hash-transition' 2024-03-28 14:13:50 -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 'eb/hash-transition' 2024-03-28 14:13:50 -07:00
pack-bitmap.c Merge branch 'ps/missing-btmp-fix' 2024-04-23 11:52:40 -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 Merge branch 'eb/hash-transition' 2024-03-28 14:13:50 -07:00
packfile.h
pager.c
pager.h
parallel-checkout.c
parallel-checkout.h
parse-options-cb.c parse-options-cb: only abbreviate hashes when hash algo is known 2024-05-06 22:50:48 -07:00
parse-options.c parse-options: rearrange long_name matching code 2024-03-03 09:49:22 -08:00
parse-options.h
parse.c
parse.h
patch-delta.c
patch-ids.c
patch-ids.h
path.c path: move validate_headref() to its only user 2024-05-06 22:50:48 -07:00
path.h path: move validate_headref() to its only user 2024-05-06 22:50:48 -07:00
pathspec.c
pathspec.h
pkt-line.c
pkt-line.h
preload-index.c
preload-index.h
pretty.c Merge branch 'rs/date-mode-pass-by-value' 2024-04-16 14:50:29 -07:00
pretty.h Merge branch 'rs/date-mode-pass-by-value' 2024-04-16 14:50:29 -07:00
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
reachable.h
read-cache-ll.h revision: optionally record matches with pathspec elements 2024-04-03 14:55:21 -07:00
read-cache.c revision: optionally record matches with pathspec elements 2024-04-03 14:55:21 -07:00
read-cache.h
README.md
rebase-interactive.c strbuf: accept a comment string for strbuf_add_commented_lines() 2024-03-12 13:28:10 -07:00
rebase-interactive.h
rebase.c
rebase.h
ref-filter.c date: make DATE_MODE thread-safe 2024-04-05 15:21:14 -07:00
ref-filter.h
reflog-walk.c date: make DATE_MODE thread-safe 2024-04-05 15:21:14 -07:00
reflog-walk.h date: make DATE_MODE thread-safe 2024-04-05 15:21:14 -07:00
reflog.c Merge branch 'eb/hash-transition' 2024-03-28 14:13:50 -07:00
reflog.h
refs.c Merge branch 'kn/for-all-refs' 2024-03-05 09:44:44 -08:00
refs.h refs/reftable: expose auto compaction via new flag 2024-03-25 09:54:07 -07:00
refspec.c
refspec.h
RelNotes Start the 2.46 cycle 2024-04-30 14:52:20 -07:00
remote-curl.c remote-curl: fix parsing of detached SHA256 heads 2024-05-06 22:50:49 -07:00
remote.c Merge branch 'js/merge-base-with-missing-commit' 2024-03-11 14:12:30 -07:00
remote.h
replace-object.c
replace-object.h
repo-settings.c
repository.c repository: stop setting SHA1 as the default object hash 2024-05-06 22:50:50 -07:00
repository.h repository: drop initialize_the_repository() 2024-04-18 12:30:43 -07:00
rerere.c Merge branch 'mr/rerere-crash-fix' 2024-04-23 11:52:41 -07:00
rerere.h
reset.c Merge branch 'js/merge-tree-3-trees' 2024-03-07 15:59:41 -08:00
reset.h
resolve-undo.c
resolve-undo.h
revision.c Merge branch 'eb/hash-transition' 2024-03-28 14:13:50 -07:00
revision.h revision: optionally record matches with pathspec elements 2024-04-03 14:55:21 -07:00
run-command.c run-command: introduce function to prepare auto-maintenance process 2024-04-17 08:42:26 -07:00
run-command.h run-command: introduce function to prepare auto-maintenance process 2024-04-17 08:42:26 -07:00
sane-ctype.h
scalar.c
SECURITY.md
send-pack.c
send-pack.h
sequencer.c Merge branch 'pw/rebase-m-signoff-fix' 2024-04-30 14:49:41 -07:00
sequencer.h Merge branch 'pw/rebase-m-signoff-fix' 2024-04-30 14:49:41 -07:00
serve.c
serve.h
server-info.c
server-info.h
setup.c path: move validate_headref() to its only user 2024-05-06 22:50:48 -07:00
setup.h Merge branch 'eb/hash-transition' 2024-03-28 14:13:50 -07:00
sh-i18n--envsubst.c
sha1dc_git.c
sha1dc_git.h
shallow.c
shallow.h
shared.mak
shell.c
shortlog.h
sideband.c sideband: avoid short write(2) 2024-03-02 11:12:16 -08:00
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 don't report vsnprintf(3) error as bug 2024-04-21 12:27:07 -07:00
strbuf.h Merge branch 'jk/core-comment-string' 2024-04-05 10:49:49 -07:00
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: add --comment option to add a comment 2024-03-15 12:25:35 -07:00
submodule-config.h
submodule.c config: add --comment option to add a comment 2024-03-15 12:25:35 -07:00
submodule.h
symlinks.c
symlinks.h
tag.c
tag.h
tar.h
tempfile.c lockfile: report when rollback fails 2024-03-07 12:34:13 -08:00
tempfile.h lockfile: report when rollback fails 2024-03-07 12:34:13 -08:00
thread-utils.c
thread-utils.h
tmp-objdir.c
tmp-objdir.h
trace2.c trace2: emit 'def_param' set with 'cmd_name' event 2024-03-07 10:24:34 -08:00
trace2.h
trace.c
trace.h
trailer.c Merge branch 'la/format-trailer-info' 2024-04-23 11:52:39 -07:00
trailer.h trailer: finish formatting unification 2024-03-15 10:10:25 -07:00
transport-helper.c Merge branch 'jk/remote-helper-object-format-option-fix' 2024-04-03 10:56:18 -07:00
transport-internal.h
transport.c
transport.h
tree-diff.c
tree-walk.c Merge branch 'eb/hash-transition' 2024-03-28 14:13:50 -07:00
tree-walk.h Merge branch 'eb/hash-transition' 2024-03-28 14:13:50 -07:00
tree.c Merge branch 'eb/hash-transition' 2024-03-28 14:13:50 -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
unpack-trees.h
upload-pack.c Merge branch 'jk/upload-pack-v2-capability-cleanup' 2024-03-07 15:59:42 -08:00
upload-pack.h
url.c
url.h
urlmatch.c
urlmatch.h
usage.c usage: report vsnprintf(3) failure 2024-04-05 15:16:27 -07:00
userdiff.c userdiff: better method/property matching for C# 2024-04-05 15:21:43 -07:00
userdiff.h
utf8.c
utf8.h
varint.c
varint.h
version.c
version.h
versioncmp.c
versioncmp.h
walker.c
walker.h
wildmatch.c
wildmatch.h
worktree.c config: add --comment option to add a comment 2024-03-15 12:25:35 -07:00
worktree.h
wrap-for-bin.sh
wrapper.c don't report vsnprintf(3) error as bug 2024-04-21 12:27:07 -07:00
wrapper.h
write-or-die.c
write-or-die.h
ws.c
ws.h
wt-status.c Merge branch 'jk/core-comment-string' 2024-04-05 10:49:49 -07:00
wt-status.h status: unify parsing of --untracked= and status.showUntrackedFiles 2024-03-13 10:43:32 -07:00
xdiff-interface.c xdiff-interface: refactor parsing of merge.conflictstyle 2024-03-14 10:08:52 -07:00
xdiff-interface.h xdiff-interface: refactor parsing of merge.conflictstyle 2024-03-14 10:08:52 -07:00

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).

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