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Abhishek Kumar f90fca638e commit-graph: consolidate fill_commit_graph_info
Both fill_commit_graph_info() and fill_commit_in_graph() parse
information present in commit data chunk. Let's simplify the
implementation by calling fill_commit_graph_info() within
fill_commit_in_graph().

fill_commit_graph_info() used to not load committer data from commit data
chunk. However, with the upcoming switch to using corrected committer
date as generation number v2, we will have to load committer date to
compute generation number value anyway.

e51217e15 (t5000: test tar files that overflow ustar headers,
30-06-2016) introduced a test 'generate tar with future mtime' that
creates a commit with committer date of (2^36 + 1) seconds since
EPOCH. The CDAT chunk provides 34-bits for storing committer date, thus
committer time overflows into generation number (within CDAT chunk) and
has undefined behavior.

The test used to pass as fill_commit_graph_info() would not set struct
member `date` of struct commit and load committer date from the object
database, generating a tar file with the expected mtime.

However, with corrected commit date, we will load the committer date
from CDAT chunk (truncated to lower 34-bits to populate the generation
number. Thus, Git sets date and generates tar file with the truncated
mtime.

The ustar format (the header format used by most modern tar programs)
only has room for 11 (or 12, depending on some implementations) octal
digits for the size and mtime of each file.

As the CDAT chunk is overflow by 12-octal digits but not 11-octal
digits, we split the existing tests to test both implementations
separately and add a new explicit test for 11-digit implementation.

To test the 11-octal digit implementation, we create a future commit
with committer date of 2^34 - 1, which overflows 11-octal digits without
overflowing 34-bits of the Commit Date chunks.

To test the 12-octal digit implementation, the smallest committer date
possible is 2^36 + 1, which overflows the CDAT chunk and thus
commit-graph must be disabled for the test.

Signed-off-by: Abhishek Kumar <abhishekkumar8222@gmail.com>
Reviewed-by: Taylor Blau <me@ttaylorr.com>
Reviewed-by: Derrick Stolee <dstolee@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-01-18 16:21:18 -08:00
.github Merge branch 'da/vs-build-iconv-fix' 2020-12-14 10:21:38 -08:00
Documentation Git 2.30 2020-12-27 15:15:23 -08:00
block-sha1 block-sha1: take a size_t length parameter 2020-11-16 13:41:35 -08:00
builtin Merge branch 'ma/maintenance-crontab-fix' 2020-12-23 13:59:46 -08:00
ci ci: avoid `set-env` construct in print-test-failures.sh 2020-11-17 12:12:30 -08:00
compat Merge branch 'da/vs-build-iconv-fix' 2020-12-14 10:21:38 -08:00
contrib Merge branch 'js/cmake-extra-built-ins-fix' 2020-12-14 10:21:38 -08:00
ewah
git-gui Merge https://github.com/prati0100/git-gui 2020-12-18 15:07:10 -08:00
gitk-git
gitweb gitweb/Makefile: conditionally include ../GIT-VERSION-FILE 2020-12-08 16:56:56 -08:00
mergetools Merge branch 'pd/mergetool-nvimdiff' 2020-11-21 15:14:39 -08:00
negotiator
perl
po l10n: zh_CN: for git v2.30.0 l10n round 1 and 2 2020-12-27 19:23:27 +08:00
ppc
refs
sha1collisiondetection@855827c583
sha1dc
sha256
t commit-graph: consolidate fill_commit_graph_info 2021-01-18 16:21:18 -08:00
templates
trace2
vcs-svn
xdiff
.cirrus.yml
.clang-format
.editorconfig
.gitattributes
.gitignore Merge branch 'fc/random-cleanup' 2020-12-08 15:11:21 -08:00
.gitmodules
.mailmap
.travis.yml
.tsan-suppressions
CODE_OF_CONDUCT.md
COPYING
GIT-VERSION-GEN Git 2.30 2020-12-27 15:15:23 -08:00
INSTALL doc: mention Python 3.x supports 2020-12-14 15:01:03 -08:00
LGPL-2.1
Makefile Merge branch 'dd/doc-p4-requirements-update' 2020-12-18 15:15:17 -08:00
README.md
RelNotes
abspath.c
aclocal.m4
add-interactive.c Merge branch 'js/add-i-color-fix' 2020-12-08 15:11:17 -08:00
add-interactive.h
add-patch.c Merge branch 'js/add-i-color-fix' 2020-12-08 15:11:17 -08:00
advice.c
advice.h
alias.c
alias.h
alloc.c
alloc.h
apply.c Merge branch 'ab/unreachable-break' 2020-12-18 15:15:18 -08:00
apply.h
archive-tar.c
archive-zip.c
archive.c Merge branch 'rs/archive-plug-leak-refname' 2020-11-25 15:24:53 -08:00
archive.h Merge branch 'rs/archive-plug-leak-refname' 2020-11-25 15:24:53 -08:00
attr.c
attr.h
banned.h banned.h: mark ctime_r() and asctime_r() as banned 2020-12-02 14:30:39 -08:00
base85.c
bisect.c Merge branch 'sg/bisect-approximately-halfway' 2020-11-25 15:24:52 -08:00
bisect.h
blame.c Merge branch 'en/strmap' 2020-11-21 15:14:38 -08:00
blame.h
blob.c
blob.h
bloom.c
bloom.h
branch.c
branch.h
builtin.h Merge branch 'ds/maintenance-part-3' 2020-11-18 13:32:53 -08:00
bulk-checkin.c
bulk-checkin.h
bundle.c
bundle.h
cache-tree.c
cache-tree.h
cache.h Merge branch 'jk/oid-array-cleanup' 2020-12-17 15:06:40 -08:00
chdir-notify.c
chdir-notify.h
check-builtins.sh
check_bindir
checkout.c
checkout.h
color.c
color.h
column.c
column.h
combine-diff.c
command-list.txt Merge branch 'ab/retire-parse-remote' 2020-12-03 00:18:06 -08:00
commit-graph.c commit-graph: consolidate fill_commit_graph_info 2021-01-18 16:21:18 -08:00
commit-graph.h
commit-reach.c
commit-reach.h
commit-slab-decl.h
commit-slab-impl.h
commit-slab.h
commit.c
commit.h
common-main.c
config.c Merge branch 'ds/config-literal-value' 2020-12-08 15:11:19 -08:00
config.h config: plumb --fixed-value into config API 2020-11-25 14:43:48 -08:00
config.mak.dev Merge branch 'jc/sparse-error-for-developer-build' 2020-11-18 13:32:54 -08:00
config.mak.in
config.mak.uname Merge branch 'rb/nonstop-config-mak-uname-update' 2020-12-18 15:15:18 -08:00
configure.ac
connect.c
connect.h
connected.c
connected.h
convert.c
convert.h
copy.c
credential.c
credential.h
csum-file.c
csum-file.h csum-file: add hashwrite_be64() 2020-11-12 09:40:06 -08:00
ctype.c
daemon.c
date.c
decorate.c
decorate.h
delta-islands.c
delta-islands.h
delta.h
detect-compiler
diff-delta.c
diff-lib.c Merge branch 'rs/plug-diff-cache-leak' 2020-11-25 15:24:53 -08:00
diff-no-index.c
diff.c Merge branch 'jc/diff-I-status-fix' 2020-12-18 15:15:18 -08:00
diff.h
diffcore-break.c
diffcore-delta.c
diffcore-order.c
diffcore-pickaxe.c
diffcore-rename.c
diffcore.h
dir-iterator.c
dir-iterator.h
dir.c Merge branch 'en/strmap' 2020-11-21 15:14:38 -08:00
dir.h
editor.c
entry.c
environment.c
exec-cmd.c
exec-cmd.h
fetch-negotiator.c
fetch-negotiator.h
fetch-pack.c Merge branch 'rs/fetch-pack-invalid-lockfile' 2020-12-08 15:11:20 -08:00
fetch-pack.h
fmt-merge-msg.c
fmt-merge-msg.h
fsck.c
fsck.h
fsmonitor.c
fsmonitor.h
fuzz-commit-graph.c
fuzz-pack-headers.c
fuzz-pack-idx.c
generate-cmdlist.sh
generate-configlist.sh
gettext.c
gettext.h
git-add--interactive.perl Merge branch 'js/add-i-color-fix' 2020-12-08 15:11:17 -08:00
git-archimport.perl
git-bisect.sh
git-compat-util.h Merge branch 'jc/compat-util-setitimer-fix' 2020-12-18 15:15:17 -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-quiltimport.sh
git-rebase--preserve-merges.sh
git-request-pull.sh
git-send-email.perl
git-sh-i18n.sh
git-sh-setup.sh
git-submodule.sh submodule: fix fetch_in_submodule logic 2020-11-24 13:14:09 -08:00
git-svn.perl
git-web--browse.sh
git.c maintenance: fix SEGFAULT when no repository 2020-11-30 13:44:15 -08:00
git.rc
gpg-interface.c
gpg-interface.h
graph.c
graph.h
grep.c grep: copy struct in one fell swoop 2020-11-30 13:55:54 -08:00
grep.h grep: use designated initializers for `grep_defaults` 2020-11-21 14:50:33 -08:00
hash.h cache.h: move hash/oid functions to hash.h 2020-12-04 13:55:14 -08:00
hashmap.c
hashmap.h
help.c help.c: help.autocorrect=never means "do not compute suggestions" 2020-11-25 13:02:15 -08:00
help.h
hex.c
http-backend.c
http-fetch.c
http-push.c
http-walker.c
http.c
http.h
ident.c
imap-send.c imap-send: parse default git config 2020-12-01 11:10:59 -08:00
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 list-objects-filter-options: fix function name in BUG 2020-11-16 14:28:25 -08:00
list-objects-filter-options.h
list-objects-filter.c
list-objects-filter.h
list-objects.c
list-objects.h
list.h
ll-merge.c
ll-merge.h
lockfile.c
lockfile.h
log-tree.c
log-tree.h
ls-refs.c
ls-refs.h
mailinfo.c
mailinfo.h
mailmap.c
mailmap.h
match-trees.c
mem-pool.c
mem-pool.h
merge-blobs.c
merge-blobs.h
merge-ort-wrappers.c
merge-ort-wrappers.h
merge-ort.c
merge-ort.h
merge-recursive.c
merge-recursive.h
merge.c
mergesort.c
mergesort.h
midx.c Merge branch 'tb/idx-midx-race-fix' 2020-12-08 15:11:18 -08:00
midx.h
name-hash.c
notes-cache.c
notes-cache.h
notes-merge.c
notes-merge.h
notes-utils.c
notes-utils.h
notes.c Merge branch 'na/notes-displayref-is-not-boolean' 2020-11-30 14:49:44 -08:00
notes.h
object-store.h
object.c Merge branch 'en/strmap' 2020-11-21 15:14:38 -08:00
object.h
oid-array.c oid-array: provide a for-loop iterator 2020-12-07 12:32:04 -08:00
oid-array.h oid-array: provide a for-loop iterator 2020-12-07 12:32:04 -08:00
oidmap.c
oidmap.h
oidset.c
oidset.h
pack-bitmap-write.c
pack-bitmap.c
pack-bitmap.h
pack-check.c fsck: correctly compute checksums on idx files larger than 4GB 2020-11-16 13:41:35 -08:00
pack-objects.c
pack-objects.h
pack-revindex.c compute pack .idx byte offsets using size_t 2020-11-16 13:41:35 -08:00
pack-revindex.h
pack-write.c Merge branch 'rs/hashwrite-be64' 2020-11-25 15:24:52 -08:00
pack.h
packfile.c Merge branch 'tb/idx-midx-race-fix' 2020-12-08 15:11:18 -08:00
packfile.h
pager.c
parse-options-cb.c
parse-options.c
parse-options.h
patch-delta.c
patch-ids.c
patch-ids.h
path.c
path.h
pathspec.c
pathspec.h
pkt-line.c
pkt-line.h
preload-index.c
pretty.c
pretty.h
prio-queue.c
prio-queue.h
progress.c
progress.h
promisor-remote.c
promisor-remote.h
prompt.c
prompt.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.c
rebase-interactive.c
rebase-interactive.h
rebase.c
rebase.h
ref-filter.c Merge branch 'en/strmap' 2020-11-21 15:14:38 -08:00
ref-filter.h
reflog-walk.c
reflog-walk.h
refs.c init: provide useful advice about init.defaultBranch 2020-12-13 15:53:51 -08:00
refs.h get_default_branch_name(): prepare for showing some advice 2020-12-13 15:53:50 -08:00
refspec.c Merge branch 'fc/atmark-in-refspec' 2020-12-14 10:21:36 -08:00
refspec.h
remote-curl.c
remote.c Merge branch 'nk/refspecs-negative-fix' 2020-12-23 13:59:46 -08:00
remote.h
replace-object.c
replace-object.h
repo-settings.c
repository.c
repository.h
rerere.c
rerere.h
reset.c
reset.h
resolve-undo.c
resolve-undo.h
revision.c revision: parse parent in indegree_walk_step() 2021-01-18 16:21:18 -08:00
revision.h
run-command.c
run-command.h
send-pack.c Merge branch 'js/trace2-session-id' 2020-12-08 15:11:20 -08:00
send-pack.h
sequencer.c Merge branch 'en/strmap' 2020-11-21 15:14:38 -08:00
sequencer.h Merge branch 'en/merge-ort-api-null-impl' 2020-11-18 13:32:53 -08:00
serve.c upload-pack, serve: log received client session ID 2020-11-11 18:26:53 -08:00
serve.h
server-info.c
setup.c
sh-i18n--envsubst.c
sha1-file.c apply: don't use core.sharedRepository to create working tree files 2020-12-02 14:35:51 -08:00
sha1-lookup.c
sha1-lookup.h
sha1-name.c
sha1dc_git.c
sha1dc_git.h
shallow.c
shallow.h
shell.c
shortlog.h
sideband.c
sideband.h
sigchain.c
sigchain.h
split-index.c
split-index.h
stable-qsort.c
strbuf.c
strbuf.h
streaming.c
streaming.h
string-list.c
string-list.h
strmap.c
strmap.h strmap: make callers of strmap_remove() to call it in void context 2020-12-15 15:30:44 -08:00
strvec.c
strvec.h
sub-process.c
sub-process.h
submodule-config.c
submodule-config.h
submodule.c Revert "submodules: fix of regression on fetching of non-init subsub-repo" 2020-12-02 15:07:14 -08:00
submodule.h
symlinks.c
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: add a public function for getting the SID 2020-11-11 18:26:52 -08:00
trace2.h trace2: add a public function for getting the SID 2020-11-11 18:26:52 -08:00
trailer.c
trailer.h
transport-helper.c
transport-internal.h
transport.c transport: log received server session ID 2020-11-11 18:26:53 -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
unpack-trees.c
unpack-trees.h
upload-pack.c Merge branch 'tb/partial-clone-filters-fix' 2020-12-17 15:06:40 -08:00
upload-pack.h
url.c
url.h
urlmatch.c
urlmatch.h
usage.c Merge branch 'jt/trace-error-on-warning' 2020-12-08 15:11:17 -08:00
userdiff.c
userdiff.h
utf8.c
utf8.h
varint.c
varint.h
version.c
version.h
versioncmp.c
walker.c
walker.h
wildmatch.c
wildmatch.h
worktree.c
worktree.h
wrap-for-bin.sh
wrapper.c
write-or-die.c
ws.c
wt-status.c
wt-status.h
xdiff-interface.c
xdiff-interface.h
zlib.c

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). 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://lore.kernel.org/git/, http://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