Git with broken hash generation to generate collisions between object IDs. Don't use this! https://undefinedbehavior.de/posts/commit-vandalism/
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Derrick Stolee 5bb03de102 commit: create get_commit_tree() method
While walking the commit graph, we load struct commit objects into
the object cache. During this process, we also load struct tree
objects for the root tree of each of these commits. We load these
objects even if we are only computing commit reachability information,
such as a merge base or ahead/behind information.

Create get_commit_tree() as a first step to removing direct
references to the 'maybe_tree' member of struct commit.

Create get_commit_tree_oid() as a shortcut for several references
to "&commit->maybe_tree->object.oid" in the codebase.

Signed-off-by: Derrick Stolee <dstolee@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-04-11 10:47:16 +09:00
.github
block-sha1
builtin treewide: rename tree to maybe_tree 2018-04-11 10:47:16 +09:00
ci Merge branch 'sg/travis-linux32-sanity' 2018-02-13 13:39:16 -08:00
compat
contrib Merge branch 'bw/c-plus-plus' into ds/lazy-load-trees 2018-04-11 10:46:32 +09:00
Documentation commit-graph: implement "--append" option 2018-04-11 10:43:02 +09:00
ewah
git-gui Merge branch 'js/misc-git-gui-stuff' of ../git-gui 2018-01-09 11:07:03 -08:00
gitk-git
gitweb
mergetools
perl Merge branch 'ab/simplify-perl-makefile' 2018-02-13 13:39:03 -08:00
po l10n: de.po: translate 72 new messages 2018-01-15 07:47:30 +01:00
ppc
refs Merge branch 'kg/packed-ref-cache-fix' 2018-02-15 14:55:42 -08:00
sha1collisiondetection@19d97bf5af
sha1dc
t commit-graph: implement "--append" option 2018-04-11 10:43:02 +09:00
templates
vcs-svn
xdiff Merge branch 'jt/diff-anchored-patience' 2017-12-19 11:33:56 -08:00
.clang-format clang-format: adjust penalty for return type line break 2018-01-24 13:42:04 -08:00
.gitattributes
.gitignore commit-graph: create git-commit-graph builtin 2018-04-02 14:27:38 -07:00
.gitmodules
.mailmap
.travis.yml travis-ci: don't install default addon packages for the 32 bit Linux build 2017-12-27 12:14:39 -08:00
.tsan-suppressions
abspath.c
aclocal.m4
advice.c Merge branch 'ls/editor-waiting-message' 2017-12-19 11:33:59 -08:00
advice.h Merge branch 'ls/editor-waiting-message' 2017-12-19 11:33:59 -08:00
alias.c
alloc.c commit: integrate commit graph with commit parsing 2018-04-11 10:43:02 +09:00
apply.c Merge branch 'bw/c-plus-plus' into ds/lazy-load-trees 2018-04-11 10:46:32 +09:00
apply.h
archive-tar.c
archive-zip.c
archive.c
archive.h
argv-array.c
argv-array.h
attr.c
attr.h
base85.c
bisect.c Merge branch 'rs/lose-leak-pending' into maint 2018-02-15 15:18:11 -08:00
bisect.h
blame.c treewide: rename tree to maybe_tree 2018-04-11 10:47:16 +09:00
blame.h
blob.c
blob.h
branch.c Merge branch 'ks/branch-cleanup' 2017-12-27 11:16:25 -08:00
branch.h Merge branch 'ks/branch-cleanup' 2017-12-27 11:16:25 -08:00
builtin.h commit-graph: create git-commit-graph builtin 2018-04-02 14:27:38 -07:00
bulk-checkin.c Merge branch 'bw/c-plus-plus' into ds/lazy-load-trees 2018-04-11 10:46:32 +09:00
bulk-checkin.h
bundle.c Merge branch 'rs/lose-leak-pending' into maint 2018-02-15 15:18:11 -08:00
bundle.h
cache-tree.c Merge branch 'po/object-id' 2018-02-15 14:55:43 -08:00
cache-tree.h
cache.h Merge branch 'bw/c-plus-plus' into ds/lazy-load-trees 2018-04-11 10:46:32 +09:00
check_bindir
check-builtins.sh
check-racy.c
checkout.c
checkout.h
color.c
color.h
column.c
column.h
combine-diff.c Merge branch 'bw/c-plus-plus' into ds/lazy-load-trees 2018-04-11 10:46:32 +09:00
command-list.txt commit-graph: create git-commit-graph builtin 2018-04-02 14:27:38 -07:00
commit-graph.c treewide: rename tree to maybe_tree 2018-04-11 10:47:16 +09:00
commit-graph.h commit-graph: implement "--append" option 2018-04-11 10:43:02 +09:00
commit-slab.h
commit.c commit: create get_commit_tree() method 2018-04-11 10:47:16 +09:00
commit.h commit: create get_commit_tree() method 2018-04-11 10:47:16 +09:00
common-main.c
config.c commit-graph: add core.commitGraph setting 2018-04-11 10:43:01 +09:00
config.h
config.mak.in
config.mak.uname
configure.ac Makefile: NO_OPENSSL=1 should no longer imply BLK_SHA1=1 2017-12-28 11:55:56 -08:00
connect.c
connect.h
connected.c Merge branch 'jh/partial-clone' 2018-02-13 13:39:04 -08:00
connected.h
convert.c Merge branch 'po/object-id' 2018-02-15 14:55:43 -08:00
convert.h convert_to_git(): safe_crlf/checksafe becomes int conv_flags 2018-01-16 12:35:56 -08:00
copy.c
COPYING
credential-cache--daemon.c
credential-cache.c
credential-store.c
credential.c
credential.h
csum-file.c csum-file: refactor finalize_hashfile() method 2018-04-02 14:27:30 -07:00
csum-file.h csum-file: refactor finalize_hashfile() method 2018-04-02 14:27:30 -07:00
ctype.c
daemon.c daemon: fix length computation in newline stripping 2018-01-25 13:50:17 -08:00
date.c
decorate.c
decorate.h
delta.h
diff-delta.c
diff-lib.c Merge branch 'bw/c-plus-plus' into ds/lazy-load-trees 2018-04-11 10:46:32 +09:00
diff-no-index.c
diff.c Merge branch 'bw/c-plus-plus' into ds/lazy-load-trees 2018-04-11 10:46:32 +09:00
diff.h Merge branch 'sb/diff-blobfind-pickaxe' 2018-01-23 13:16:37 -08:00
diffcore-break.c
diffcore-delta.c diffcore-delta: rename 'new' variables 2018-02-22 10:08:05 -08:00
diffcore-order.c
diffcore-pickaxe.c diff: properly error out when combining multiple pickaxe options 2018-01-04 15:02:40 -08:00
diffcore-rename.c Merge branch 'po/object-id' 2018-02-15 14:55:43 -08:00
diffcore.h
dir-iterator.c
dir-iterator.h
dir.c Merge branch 'nd/trace-index-ops' 2018-02-15 14:55:44 -08:00
dir.h dir: convert struct sha1_stat to use object_id 2018-01-30 10:42:36 -08:00
editor.c
entry.c entry: rename 'new' variables 2018-02-22 10:08:05 -08:00
environment.c Merge branch 'bw/c-plus-plus' into ds/lazy-load-trees 2018-04-11 10:46:32 +09:00
exec_cmd.c
exec_cmd.h
fast-import.c Merge branch 'bw/c-plus-plus' into ds/lazy-load-trees 2018-04-11 10:46:32 +09:00
fetch-object.c
fetch-object.h
fetch-pack.c Merge branch 'jh/partial-clone' 2018-02-13 13:39:04 -08:00
fetch-pack.h
fmt-merge-msg.h
fsck.c treewide: rename tree to maybe_tree 2018-04-11 10:47:16 +09:00
fsck.h
fsmonitor.c
fsmonitor.h
generate-cmdlist.sh
gettext.c
gettext.h
git-add--interactive.perl add--interactive: ignore submodule changes except HEAD 2018-01-16 12:32:45 -08:00
git-archimport.perl
git-bisect.sh
git-compat-util.h wrapper: rename 'template' variables 2018-02-22 10:08:05 -08:00
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-p4: update multiple shelved change lists 2017-12-22 13:30:52 -08:00
git-parse-remote.sh
git-quiltimport.sh
git-rebase--am.sh
git-rebase--interactive.sh Merge branch 'js/fix-merge-arg-quoting-in-rebase-p' 2018-01-10 14:01:24 -08:00
git-rebase--merge.sh
git-rebase.sh rebase: rebasing can also be done when HEAD is detached 2017-12-19 10:02:47 -08:00
git-remote-testgit.sh
git-request-pull.sh
git-send-email.perl Merge branch 'ab/simplify-perl-makefile' 2018-02-13 13:39:03 -08:00
git-sh-i18n.sh
git-sh-setup.sh
git-stash.sh Merge branch 'tg/stash-with-pathspec-fix' into maint 2018-02-15 15:18:13 -08:00
git-submodule.sh submodule: port submodule subcommand 'deinit' from shell to C 2018-01-16 11:29:50 -08:00
git-svn.perl Merge branch 'jm/svn-pushmergeinfo-fix' into maint 2018-02-15 15:18:11 -08:00
GIT-VERSION-GEN Git 2.16.2 2018-02-15 15:21:23 -08:00
git-web--browse.sh
git.c commit-graph: create git-commit-graph builtin 2018-04-02 14:27:38 -07:00
git.rc
gpg-interface.c
gpg-interface.h
graph.c
graph.h
grep.c Merge branch 'ab/pcre2-grep' 2017-12-13 13:28:54 -08:00
grep.h
hash.h hash: update obsolete reference to SHA1_HEADER 2018-02-09 09:56:10 -08:00
hashmap.c
hashmap.h Merge branch 'rb/hashmap-h-compilation-fix' 2018-02-13 13:39:10 -08:00
help.c version --build-options: report commit, too, if possible 2017-12-14 22:53:04 -08:00
help.h
hex.c
http-backend.c Merge branch 'rs/resolve-ref-optional-result' 2017-09-28 14:47:56 +09:00
http-fetch.c
http-push.c treewide: rename tree to maybe_tree 2018-04-11 10:47:16 +09:00
http-walker.c sha1_file: remove static strbuf from sha1_file_name() 2018-01-17 12:21:32 -08:00
http.c Merge branch 'bw/c-plus-plus' into ds/lazy-load-trees 2018-04-11 10:46:32 +09:00
http.h
ident.c
imap-send.c imap-send: rename 'new' variables 2018-02-22 10:08:05 -08:00
INSTALL
iterator.h
khash.h
kwset.c
kwset.h
levenshtein.c
levenshtein.h
LGPL-2.1
line-log.c treewide: rename tree to maybe_tree 2018-04-11 10:47:16 +09:00
line-log.h
line-range.c
line-range.h
list-objects-filter-options.c
list-objects-filter-options.h
list-objects-filter.c
list-objects-filter.h
list-objects.c treewide: rename tree to maybe_tree 2018-04-11 10:47:16 +09:00
list-objects.h
list.h
ll-merge.c
ll-merge.h merge-recursive --patience 2010-08-26 09:20:03 -07:00
lockfile.c
lockfile.h
log-tree.c treewide: rename tree to maybe_tree 2018-04-11 10:47:16 +09:00
log-tree.h
mailinfo.c Merge branch 'jc/mailinfo-cleanup-fix' 2018-02-13 13:39:14 -08:00
mailinfo.h
mailmap.c
mailmap.h
Makefile commit-graph: implement write_commit_graph() 2018-04-02 14:27:38 -07:00
match-trees.c sha1_file: convert write_sha1_file to object_id 2018-01-30 10:42:36 -08:00
merge-blobs.c
merge-blobs.h
merge-recursive.c treewide: rename tree to maybe_tree 2018-04-11 10:47:16 +09:00
merge-recursive.h
merge.c Merge branch 'ew/empty-merge-with-dirty-index-maint' into ew/empty-merge-with-dirty-index 2017-12-22 12:48:38 -08:00
mergesort.c mergesort: rename it to llist_mergesort() 2012-04-17 11:07:01 -07:00
mergesort.h
name-hash.c trace: measure where the time is spent in the index-heavy operations 2018-02-02 11:20:16 -08:00
notes-cache.c sha1_file: convert write_sha1_file to object_id 2018-01-30 10:42:36 -08:00
notes-cache.h
notes-merge.c treewide: rename tree to maybe_tree 2018-04-11 10:47:16 +09:00
notes-merge.h
notes-utils.c notes: convert write_notes_tree to object_id 2018-01-30 10:42:36 -08:00
notes-utils.h commit: convert commit_tree* to object_id 2018-01-30 10:42:36 -08:00
notes.c sha1_file: convert write_sha1_file to object_id 2018-01-30 10:42:36 -08:00
notes.h notes: convert write_notes_tree to object_id 2018-01-30 10:42:36 -08:00
object.c Merge branch 'bw/c-plus-plus' into ds/lazy-load-trees 2018-04-11 10:46:32 +09:00
object.h Merge branch 'rs/lose-leak-pending' into maint 2018-02-15 15:18:11 -08:00
oidmap.c oidmap: ensure map is initialized 2017-12-27 12:28:06 -08:00
oidmap.h
oidset.c
oidset.h oidset: don't return value from oidset_init 2018-01-08 15:24:35 -08:00
pack-bitmap-write.c csum-file: refactor finalize_hashfile() method 2018-04-02 14:27:30 -07:00
pack-bitmap.c
pack-bitmap.h
pack-check.c Merge branch 'bw/c-plus-plus' into ds/lazy-load-trees 2018-04-11 10:46:32 +09:00
pack-objects.c
pack-objects.h
pack-revindex.c packfile: use get_be64() for large offsets 2018-01-19 11:04:56 -08:00
pack-revindex.h
pack-write.c csum-file: refactor finalize_hashfile() method 2018-04-02 14:27:30 -07:00
pack.h csum-file: rename sha1file to hashfile 2018-02-02 11:28:41 -08:00
packfile.c treewide: rename tree to maybe_tree 2018-04-11 10:47:16 +09:00
packfile.h commit-graph: read only from specific pack-indexes 2018-04-11 10:43:02 +09:00
pager.c
parse-options-cb.c
parse-options.c Use MOVE_ARRAY 2018-01-22 11:32:51 -08:00
parse-options.h
patch-delta.c
patch-ids.c
patch-ids.h
path.c
path.h
pathspec.c
pathspec.h Merge branch 'bw/pathspec-match-submodule-boundary' 2017-12-19 11:33:56 -08:00
pkt-line.c
pkt-line.h
preload-index.c trace: measure where the time is spent in the index-heavy operations 2018-02-02 11:20:16 -08:00
pretty.c treewide: rename tree to maybe_tree 2018-04-11 10:47:16 +09:00
pretty.h
prio-queue.c
prio-queue.h
progress.c Merge branch 'en/rename-progress' 2017-12-19 11:33:55 -08:00
progress.h
prompt.c
prompt.h
protocol.c
protocol.h
quote.c trace: avoid unnecessary quoting 2018-01-16 12:16:54 -08:00
quote.h trace: avoid unnecessary quoting 2018-01-16 12:16:54 -08:00
reachable.c object: rename function 'typename' to 'type_name' 2018-02-14 13:10:05 -08:00
reachable.h
read-cache.c Merge branch 'bw/c-plus-plus' into ds/lazy-load-trees 2018-04-11 10:46:32 +09:00
README.md
ref-filter.c treewide: rename tree to maybe_tree 2018-04-11 10:47:16 +09:00
ref-filter.h
reflog-walk.c
reflog-walk.h
refs.c
refs.h
RelNotes Git 2.16.2 2018-02-15 15:21:23 -08:00
remote-curl.c
remote-testsvn.c
remote.c remote: rename 'new' variables 2018-02-22 10:08:05 -08:00
remote.h
replace_object.c Use MOVE_ARRAY 2018-01-22 11:32:51 -08:00
repository.c Merge branch 'tg/split-index-fixes' 2018-02-13 13:39:13 -08:00
repository.h
rerere.c Use MOVE_ARRAY 2018-01-22 11:32:51 -08:00
rerere.h
resolve-undo.c
resolve-undo.h
revision.c treewide: rename tree to maybe_tree 2018-04-11 10:47:16 +09:00
revision.h Merge branch 'jk/cached-commit-buffer' into HEAD 2018-03-13 13:35:25 -07:00
run-command.c run-command.c: print new cwd in trace_run_command() 2018-01-19 10:49:20 -08:00
run-command.h
send-pack.c send-pack: use internal argv_array of struct child_process 2017-12-22 13:33:53 -08:00
send-pack.h
sequencer.c treewide: rename tree to maybe_tree 2018-04-11 10:47:16 +09:00
sequencer.h Merge branch 'pw/sequencer-in-process-commit' 2018-02-13 13:39:15 -08:00
server-info.c
setup.c Merge branch 'jh/fsck-promisors' 2018-02-13 13:39:03 -08:00
sh-i18n--envsubst.c
sha1_file.c Merge branch 'bw/c-plus-plus' into ds/lazy-load-trees 2018-04-11 10:46:32 +09:00
sha1_name.c treewide: rename tree to maybe_tree 2018-04-11 10:47:16 +09:00
sha1-array.c
sha1-array.h
sha1-lookup.c packfile: refactor hash search with fanout table 2018-02-15 13:08:55 -08:00
sha1-lookup.h packfile: refactor hash search with fanout table 2018-02-15 13:08:55 -08:00
sha1dc_git.c
sha1dc_git.h
shallow.c
shell.c
shortlog.h
show-index.c
sideband.c
sideband.h
sigchain.c
sigchain.h
split-index.c Merge branch 'bw/c-plus-plus' into ds/lazy-load-trees 2018-04-11 10:46:32 +09:00
split-index.h split-index: rename 'new' variables 2018-02-22 10:08:05 -08:00
strbuf.c Merge branch 'jd/fix-strbuf-add-urlencode-bytes' 2018-01-05 13:28:10 -08:00
strbuf.h
streaming.c
streaming.h
string-list.c
string-list.h
sub-process.c
sub-process.h Docs: split out long-running subprocess handshake 2018-01-25 11:24:32 -08:00
submodule-config.c
submodule-config.h
submodule.c submodule: rename 'new' variables 2018-02-22 10:08:05 -08:00
submodule.h submodule: rename 'new' variables 2018-02-22 10:08:05 -08:00
symlinks.c
tag.c object: rename function 'typename' to 'type_name' 2018-02-14 13:10:05 -08:00
tag.h
tar.h
tempfile.c tempfile: rename 'template' variables 2018-02-22 10:08:05 -08:00
tempfile.h tempfile: rename 'template' variables 2018-02-22 10:08:05 -08:00
thread-utils.c
thread-utils.h
tmp-objdir.c
tmp-objdir.h
trace.c trace.c: move strbuf_release() out of print_trace_line() 2018-01-16 12:16:54 -08:00
trace.h
trailer.c trailer: rename 'template' variables 2018-02-22 10:08:05 -08:00
trailer.h
transport-helper.c Merge branch 'jh/partial-clone' 2018-02-13 13:39:04 -08:00
transport-internal.h transport: make transport vtable more private 2017-12-14 14:28:04 -08:00
transport.c Merge branch 'jh/partial-clone' 2018-02-13 13:39:04 -08:00
transport.h Merge branch 'jh/partial-clone' 2018-02-13 13:39:04 -08:00
tree-diff.c
tree-walk.c Merge branch 'bw/pathspec-match-submodule-boundary' 2017-12-19 11:33:56 -08:00
tree-walk.h
tree.c treewide: rename tree to maybe_tree 2018-04-11 10:47:16 +09:00
tree.h
unicode_width.h
unimplemented.sh
unix-socket.c
unix-socket.h
unpack-trees.c Merge branch 'bw/c-plus-plus' into ds/lazy-load-trees 2018-04-11 10:46:32 +09:00
unpack-trees.h
upload-pack.c Merge branch 'jh/partial-clone' 2018-02-13 13:39:04 -08:00
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 --build-options: report commit, too, if possible 2017-12-14 22:53:04 -08:00
version.h version --build-options: report commit, too, if possible 2017-12-14 22:53:04 -08:00
versioncmp.c
walker.c treewide: rename tree to maybe_tree 2018-04-11 10:47:16 +09:00
walker.h
wildmatch.c
wildmatch.h
worktree.c
worktree.h
wrap-for-bin.sh
wrapper.c wrapper: rename 'template' variables 2018-02-22 10:08:05 -08:00
write_or_die.c run-command: move check_pipe() from write_or_die to run_command 2016-10-17 11:36:49 -07:00
ws.c
wt-status.c Merge branch 'nd/ita-wt-renames-in-status' 2018-01-23 13:16:28 -08:00
wt-status.h Merge branch 'nd/ita-wt-renames-in-status' 2018-01-23 13:16:28 -08:00
xdiff-interface.c
xdiff-interface.h
zlib.c

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-.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://public-inbox.org/git/, http://marc.info/?l=git and other archival sites.

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