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Junio C Hamano f309e8e768 merge-recursive: do not look at the index during recursive merge
When merging another branch into ours, if their tree is the same as
the common ancestor's, we can declare that our tree represents the
result of three-way merge.  In such a case, the recursive merge
backend incorrectly used to create a commit out of our index, even
when the index has changes.

A recent fix attempted to prevent this by adding a comparison
between "our" tree and the index, but forgot that this check must be
restricted only to the outermost merge.  Inner merges performed by
the recursive backend across merge bases are by definition made from
scratch without having any local changes added to the index.  The
call to index_has_changes() during an inner merge is working on the
index that has no relation to the merge being performed, preventing
legitimate merges from getting carried out.

Fix it by limiting the check to the outermost merge.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2018-01-09 10:39:30 -08:00
.github
Documentation Prepare for 2.15.2 2017-12-06 09:10:35 -08:00
block-sha1
builtin move index_has_changes() from builtin/am.c to merge.c for reuse 2017-12-22 12:20:29 -08:00
ci travis-ci: fix running P4 and Git LFS tests in Linux build jobs 2017-11-02 11:05:28 +09:00
compat Merge branch 'tz/fsf-address-update' into maint 2017-11-21 14:05:32 +09:00
contrib Merge branch 'tz/complete-branch-copy' into maint 2017-12-06 09:09:02 -08:00
ewah Replace Free Software Foundation address in license notices 2017-11-09 13:21:21 +09:00
git-gui Merge branch 'tz/fsf-address-update' of ../git-gui into tz/fsf-address-update 2017-11-09 13:24:43 +09:00
gitk-git
gitweb
mergetools
perl
po l10n: Update Catalan translation 2017-10-29 10:04:12 +08:00
ppc
refs Merge branch 'mh/avoid-rewriting-packed-refs' into maint 2017-12-06 09:08:50 -08:00
sha1collisiondetection@19d97bf5af
sha1dc
t merge-recursive: do not look at the index during recursive merge 2018-01-09 10:39:30 -08:00
templates
vcs-svn
xdiff Replace Free Software Foundation address in license notices 2017-11-09 13:21:21 +09:00
.clang-format clang-format: add a comment about the meaning/status of the 2017-10-02 13:17:48 +09:00
.gitattributes
.gitignore
.gitmodules
.mailmap mailmap: use Kaartic Sivaraam's new address 2017-11-03 23:00:07 +09:00
.travis.yml travis-ci: don't build Git for the static analysis job 2017-11-02 11:05:30 +09:00
.tsan-suppressions
COPYING
GIT-VERSION-GEN Start preparation for 2.15.1 2017-11-15 12:05:22 +09:00
INSTALL
LGPL-2.1
Makefile Merge branch 'js/mingw-full-version-in-resources' into maint 2017-11-15 12:05:03 +09:00
README.md
RelNotes Prepare for 2.15.2 2017-12-06 09:10:35 -08:00
abspath.c real_path: clarify return value ownership 2017-09-27 09:13:47 +09:00
aclocal.m4
advice.c
advice.h
alias.c
alloc.c
apply.c Merge branch 'rs/apply-inaccurate-eof-with-incomplete-line' into maint 2017-12-06 09:09:03 -08:00
apply.h
archive-tar.c
archive-zip.c
archive.c Merge branch 'rs/archive-excluded-directory' 2017-09-25 15:24:07 +09:00
archive.h
argv-array.c
argv-array.h
attr.c
attr.h
base85.c
bisect.c bisect: fix memory leak when returning best element 2017-11-06 10:15:29 +09:00
bisect.h bisect: change calling-convention of `find_bisection()` 2017-11-06 10:15:29 +09:00
blame.c
blame.h
blob.c
blob.h
branch.c Merge branch 'nd/worktree-kill-parse-ref' into maint 2017-10-23 14:14:16 +09:00
branch.h
builtin.h
bulk-checkin.c distinguish error versus short read from read_in_full() 2017-09-27 15:45:24 +09:00
bulk-checkin.h
bundle.c leak_pending: use `object_array_clear()`, not `free()` 2017-09-24 10:05:57 +09:00
bundle.h
cache-tree.c cleanup: fix possible overflow errors in binary search 2017-10-10 08:57:24 +09:00
cache-tree.h
cache.h move index_has_changes() from builtin/am.c to merge.c for reuse 2017-12-22 12:20:29 -08:00
check-builtins.sh
check-racy.c
check_bindir
color.c Merge branch 'jk/ref-filter-colors-fix' 2017-10-18 10:19:08 +09:00
color.h
column.c column: do not include pager.c 2017-10-24 10:19:06 +09:00
column.h
combine-diff.c
command-list.txt
commit-slab.h commit-slab.h: avoid -Wsign-compare warnings 2017-09-22 13:00:36 +09:00
commit.c reduce_heads: fix memory leaks 2017-11-08 11:34:00 +09:00
commit.h reduce_heads: fix memory leaks 2017-11-08 11:34:00 +09:00
common-main.c
config.c Merge branch 'sd/branch-copy' into maint 2017-12-06 09:09:01 -08:00
config.h Merge branch 'sd/branch-copy' 2017-10-03 15:42:48 +09:00
config.mak.in
config.mak.uname packed_ref_cache: keep the `packed-refs` file mmapped if possible 2017-09-25 18:02:45 +09:00
configure.ac
connect.c
connect.h
connected.c
connected.h
convert.c Merge branch 'ma/ts-cleanups' into maint 2017-10-23 14:19:02 +09:00
convert.h
copy.c
credential-cache--daemon.c
credential-cache.c
credential-store.c
credential.c
credential.h
csum-file.c prefer "!=" when checking read_in_full() result 2017-09-27 15:45:24 +09:00
csum-file.h
ctype.c
daemon.c
date.c
decorate.c
decorate.h
delta.h
diff-delta.c Merge branch 'mk/diff-delta-avoid-large-offset' 2017-09-28 14:47:56 +09:00
diff-lib.c object_array: use `object_array_clear()`, not `free()` 2017-09-24 10:06:01 +09:00
diff-no-index.c
diff.c Merge branch 'ao/diff-populate-filespec-lstat-errorpath-fix' into maint 2017-11-15 12:04:59 +09:00
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 'js/submodule-in-excluded' into maint 2017-11-15 12:04:54 +09:00
dir.h
editor.c
entry.c Merge branch 'ls/filter-process-delayed' 2017-10-11 14:52:24 +09:00
environment.c Merge branch 'jk/no-optional-locks' 2017-10-03 15:42:49 +09:00
exec_cmd.c
exec_cmd.h
fast-import.c Merge branch 'jk/write-in-full-fix' into maint 2017-10-23 14:37:22 +09:00
fetch-pack.c oidmap: map with OID as key 2017-10-01 17:18:03 +09:00
fetch-pack.h
fmt-merge-msg.h
fsck.c Merge branch 'rs/fsck-null-return-from-lookup' 2017-10-11 14:52:23 +09:00
fsck.h
generate-cmdlist.sh
gettext.c
gettext.h
git-add--interactive.perl
git-archimport.perl
git-bisect.sh
git-compat-util.h Merge branch 'rj/no-sign-compare' 2017-09-29 11:23:42 +09:00
git-cvsexportcommit.perl
git-cvsimport.perl
git-cvsserver.perl
git-difftool--helper.sh
git-filter-branch.sh Merge branch 'dg/filter-branch-filter-order-doc' 2017-10-19 14:45:45 +09:00
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-parse-remote.sh
git-quiltimport.sh
git-rebase--am.sh rebase: use mboxrd format to avoid split errors 2017-11-18 12:30:16 +09:00
git-rebase--interactive.sh Merge branch 'ad/rebase-i-serie-typofix' into maint 2017-11-21 14:05:32 +09:00
git-rebase--merge.sh
git-rebase.sh Merge branch 'tz/redirect-fix' into maint 2017-12-06 09:09:04 -08:00
git-remote-testgit.sh
git-request-pull.sh request-pull: capitalise "Git" to make it a proper noun 2017-10-03 13:11:57 +09:00
git-send-email.perl
git-sh-i18n.sh
git-sh-setup.sh
git-stash.sh
git-submodule.sh
git-svn.perl
git-web--browse.sh
git.c Merge branch 'jk/no-optional-locks' 2017-10-03 15:42:49 +09:00
git.rc mingw: include the full version information in the resources 2017-11-01 13:43:52 +09:00
gpg-interface.c
gpg-interface.h
graph.c graph: use strbuf_addchars() to add spaces 2017-10-02 13:14:07 +09:00
graph.h
grep.c Merge branch 'ab/pcre-v2' into maint 2017-11-21 14:05:30 +09:00
grep.h Merge branch 'ab/pcre-v2' into maint 2017-11-21 14:05:30 +09:00
hash.h
hashmap.c
hashmap.h
help.c
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 Merge branch 'tg/memfixes' 2017-10-07 16:27:54 +09:00
http-walker.c
http.c curl_trace(): eliminate switch fallthrough 2017-09-22 12:49:55 +09:00
http.h
ident.c
imap-send.c Merge branch 'rs/imap-send-next-arg-fix' into maint 2017-11-27 10:57:00 +09:00
iterator.h
khash.h
kwset.c Replace Free Software Foundation address in license notices 2017-11-09 13:21:21 +09:00
kwset.h Replace Free Software Foundation address in license notices 2017-11-09 13:21:21 +09:00
levenshtein.c
levenshtein.h
line-log.c ALLOC_GROW: avoid -Wsign-compare warnings 2017-09-22 13:21:11 +09:00
line-log.h ALLOC_GROW: avoid -Wsign-compare warnings 2017-09-22 13:21:11 +09:00
line-range.c
line-range.h
list-objects.c
list-objects.h
list.h
ll-merge.c
ll-merge.h
lockfile.c
lockfile.h
log-tree.c log: handle broken HEAD in decoration check 2017-10-21 21:29:37 +09:00
log-tree.h
mailinfo.c Merge branch 'rs/mailinfo-qp-decode-fix' into maint 2017-10-18 14:19:03 +09:00
mailinfo.h
mailmap.c
mailmap.h
match-trees.c
merge-blobs.c
merge-blobs.h
merge-recursive.c merge-recursive: do not look at the index during recursive merge 2018-01-09 10:39:30 -08:00
merge-recursive.h
merge.c move index_has_changes() from builtin/am.c to merge.c for reuse 2017-12-22 12:20:29 -08:00
mergesort.c
mergesort.h
mru.c
mru.h
name-hash.c
notes-cache.c
notes-cache.h
notes-merge.c notes-merge: drop dead zero-write code 2017-09-26 12:55:59 +09:00
notes-merge.h
notes-utils.c
notes-utils.h
notes.c
notes.h
object.c object_array: add and use `object_array_pop()` 2017-09-24 10:06:04 +09:00
object.h object_array: add and use `object_array_pop()` 2017-09-24 10:06:04 +09:00
oidmap.c oidmap: map with OID as key 2017-10-01 17:18:03 +09:00
oidmap.h oidmap: map with OID as key 2017-10-01 17:18:03 +09:00
oidset.c oidmap: map with OID as key 2017-10-01 17:18:03 +09:00
oidset.h oidmap: map with OID as key 2017-10-01 17:18:03 +09:00
pack-bitmap-write.c pack-bitmap[-write]: use `object_array_clear()`, don't leak 2017-09-24 10:06:08 +09:00
pack-bitmap.c Merge branch 'ma/leakplugs' 2017-09-29 11:23:43 +09:00
pack-bitmap.h
pack-check.c
pack-objects.c
pack-objects.h
pack-revindex.c
pack-revindex.h
pack-write.c avoid looking at errno for short read_in_full() returns 2017-09-27 15:45:24 +09:00
pack.h
packfile.c cleanup: fix possible overflow errors in binary search 2017-10-10 08:57:24 +09:00
packfile.h
pager.c
parse-options-cb.c
parse-options.c parse-options: only insert newline in help text if needed 2017-09-25 14:35:53 +09:00
parse-options.h
patch-delta.c
patch-ids.c
patch-ids.h
path.c Merge branch 'ao/path-use-xmalloc' 2017-10-28 10:18:40 +09:00
path.h
pathspec.c pathspec doc: parse_pathspec does not maintain references to args 2017-09-21 14:05:00 +09:00
pathspec.h pathspec doc: parse_pathspec does not maintain references to args 2017-09-21 14:05:00 +09:00
pkt-line.c Merge branch 'jk/write-in-full-fix' into maint 2017-10-23 14:37:22 +09:00
pkt-line.h
preload-index.c
pretty.c pretty.c: delimit "%(trailers)" arguments with "," 2017-10-02 09:22:52 +09:00
prio-queue.c
prio-queue.h
progress.c
progress.h
prompt.c
prompt.h
quote.c consistently use "fallthrough" comments in switches 2017-09-22 12:49:57 +09:00
quote.h
reachable.c
reachable.h
read-cache.c Merge branch 'jk/fallthrough' 2017-09-28 14:47:53 +09:00
ref-filter.c Merge branch 'tb/show-trailers-in-ref-filter' 2017-10-11 14:52:22 +09:00
ref-filter.h
reflog-walk.c refs: pass NULL to resolve_refdup() if hash is not needed 2017-10-01 17:27:14 +09:00
reflog-walk.h
refs.c Merge branch 'jk/write-in-full-fix' into maint 2017-10-23 14:37:22 +09:00
refs.h Merge branch 'sd/branch-copy' 2017-10-03 15:42:48 +09:00
remote-curl.c
remote-testsvn.c
remote.c refs: pass NULL to resolve_ref_unsafe() if hash is not needed 2017-09-24 10:18:21 +09:00
remote.h
replace_object.c
repository.c repository: use FREE_AND_NULL 2017-10-02 13:15:59 +09:00
repository.h
rerere.c Merge branch 'jk/write-in-full-fix' 2017-09-25 15:24:06 +09:00
rerere.h
resolve-undo.c
resolve-undo.h
revision.c Merge branch 'rj/no-sign-compare' 2017-09-29 11:23:42 +09:00
revision.h Merge branch 'ma/leakplugs' 2017-09-29 11:23:43 +09:00
run-command.c run-command: use ALLOC_ARRAY 2017-10-03 08:42:57 +09:00
run-command.h
send-pack.c consistently use "fallthrough" comments in switches 2017-09-22 12:49:57 +09:00
send-pack.h
sequencer.c Merge branch 'pw/sequencer-recover-from-unlockable-index' into maint 2017-12-06 09:09:03 -08:00
sequencer.h
server-info.c
setup.c Merge branch 'js/early-config' into maint 2017-11-15 12:05:01 +09:00
sh-i18n--envsubst.c Replace Free Software Foundation address in license notices 2017-11-09 13:21:21 +09:00
sha1-array.c
sha1-array.h
sha1-lookup.c cleanup: fix possible overflow errors in binary search 2017-10-10 08:57:24 +09:00
sha1-lookup.h
sha1_file.c Merge branch 'jk/info-alternates-fix' into maint 2017-11-21 14:05:31 +09:00
sha1_name.c Merge branch 'jc/check-ref-format-oor' into maint 2017-11-15 12:04:57 +09:00
sha1dc_git.c
sha1dc_git.h
shallow.c Merge branch 'ma/leakplugs' 2017-09-29 11:23:43 +09:00
shell.c
shortlog.h
show-index.c
sideband.c
sideband.h
sigchain.c
sigchain.h
split-index.c
split-index.h
strbuf.c Merge branch 'rs/strbuf-getwholeline-fix' into maint 2017-10-18 14:18:58 +09:00
strbuf.h Merge branch 'ma/ts-cleanups' into maint 2017-10-23 14:19:02 +09:00
streaming.c Merge branch 'jk/write-in-full-fix' 2017-09-25 15:24:06 +09:00
streaming.h
string-list.c cleanup: fix possible overflow errors in binary search 2017-10-10 08:57:24 +09:00
string-list.h string-list.h: move documentation from Documentation/api/ into header 2017-09-27 09:14:34 +09:00
sub-process.c Merge branch 'cc/subprocess-handshake-missing-capabilities' into maint 2017-10-18 14:19:10 +09:00
sub-process.h
submodule-config.c
submodule-config.h
submodule.c Merge branch 'sb/submodule-diff-header-fix' 2017-10-03 15:42:49 +09:00
submodule.h Merge branch 'hn/typofix' 2017-09-28 14:47:52 +09:00
symlinks.c
tag.c Merge branch 'rs/tag-null-pointer-arith-fix' 2017-10-05 13:48:20 +09:00
tag.h
tar.h
tempfile.c
tempfile.h
thread-utils.c
thread-utils.h
tmp-objdir.c
tmp-objdir.h
trace.c Replace Free Software Foundation address in license notices 2017-11-09 13:21:21 +09:00
trace.h
trailer.c
trailer.h
transport-helper.c Merge branch 'jk/write-in-full-fix' into maint 2017-10-23 14:37:22 +09:00
transport.c refs: pass NULL to resolve_refdup() if hash is not needed 2017-10-01 17:27:14 +09:00
transport.h
tree-diff.c
tree-walk.c Merge branch 'rj/no-sign-compare' 2017-09-29 11:23:42 +09:00
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 'ma/leakplugs' 2017-09-29 11:23:43 +09:00
url.c
url.h
urlmatch.c
urlmatch.h
usage.c
userdiff.c Merge branch 'ik/userdiff-html-h-element-fix' into maint 2017-10-18 14:19:02 +09:00
userdiff.h
utf8.c cleanup: fix possible overflow errors in binary search 2017-10-10 08:57:24 +09:00
utf8.h
varint.c
varint.h
version.c
version.h
versioncmp.c
walker.c
walker.h
wildmatch.c
wildmatch.h
worktree.c Merge branch 'nd/worktree-kill-parse-ref' into maint 2017-10-23 14:14:16 +09:00
worktree.h
wrap-for-bin.sh
wrapper.c wrapper.c: consistently quote filenames in error messages 2017-11-06 11:53:14 +09:00
write_or_die.c
ws.c
wt-status.c Merge branch 'bw/rebase-i-ignored-submodule-fix' into maint 2017-11-21 14:05:29 +09:00
wt-status.h
xdiff-interface.c xdiff-interface: export comparing and hashing strings 2017-10-26 11:23:22 +09:00
xdiff-interface.h xdiff-interface: export comparing and hashing strings 2017-10-26 11:23:22 +09:00
zlib.c

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.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