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Jeff King 597f9134de alternates: use a separate scratch space
The alternate_object_database struct uses a single buffer
both for storing the path to the alternate, and as a scratch
buffer for forming object names. This is efficient (since
otherwise we'd end up storing the path twice), but it makes
life hard for callers who just want to know the path to the
alternate. They have to remember to stop reading after
"alt->name - alt->base" bytes, and to subtract one for the
trailing '/'.

It would be much simpler if they could simply access a
NUL-terminated path string. We could encapsulate this in a
function which puts a NUL in the scratch buffer and returns
the string, but that opens up questions about the lifetime
of the result. The first time another caller uses the
alternate, the scratch buffer may get other data tacked onto
it.

Let's instead just store the root path separately from the
scratch buffer. There aren't enough alternates being stored
for the duplicated data to matter for performance, and this
keeps things simple and safe for the callers.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2016-10-10 13:52:36 -07:00
Documentation Sync with 2.10.1 2016-10-03 13:32:41 -07:00
block-sha1
builtin alternates: use a separate scratch space 2016-10-10 13:52:36 -07:00
ci
compat Merge branch 'rs/compat-strdup' into maint 2016-09-19 13:51:42 -07:00
contrib Merge branch 'rs/copy-array' 2016-10-03 13:30:33 -07:00
ewah
git-gui Merge branch 'va/git-gui-i18n' 2016-10-03 13:30:37 -07:00
gitk-git
gitweb gitweb: use highlight's shebang detection 2016-09-25 16:39:11 -07:00
mergetools
perl
po git-gui: l10n: add Portuguese translation 2016-09-26 07:18:33 -07:00
ppc
refs Merge branch 'mh/ref-store' 2016-09-19 13:47:19 -07:00
t t5613: clarify "too deep" recursion tests 2016-10-10 13:52:36 -07:00
templates
vcs-svn Merge branch 'mr/vcs-svn-printf-ulong' into maint 2016-09-29 16:49:37 -07:00
xdiff Merge branch 'mh/diff-indent-heuristic' 2016-10-03 13:30:38 -07:00
.gitattributes
.gitignore
.mailmap add David Turner's Two Sigma address 2016-09-26 17:46:44 -07:00
.travis.yml Merge branch 'ls/travis-homebrew-path-fix' into maint 2016-09-29 16:49:45 -07:00
COPYING
GIT-VERSION-GEN Git 2.10.1 2016-10-03 13:24:18 -07:00
INSTALL
LGPL-2.1
Makefile Merge branch 'js/regexec-buf' into maint 2016-09-29 16:49:45 -07:00
README.md
RelNotes Start preparing for 2.10.1 2016-09-19 13:54:50 -07:00
abspath.c
aclocal.m4
advice.c
advice.h
alias.c
alloc.c
apply.c introduce CHECKOUT_INIT 2016-09-22 13:42:18 -07:00
apply.h apply: learn to use a different index file 2016-09-07 12:29:54 -07:00
archive-tar.c
archive-zip.c
archive.c
archive.h
argv-array.c
argv-array.h
attr.c
attr.h
base85.c
bisect.c
bisect.h
blob.c
blob.h
branch.c
branch.h
builtin.h builtin: convert textconv_object to use struct object_id 2016-09-07 12:59:42 -07:00
bulk-checkin.c
bulk-checkin.h
bundle.c
bundle.h
cache-tree.c cache: convert struct cache_entry to use struct object_id 2016-09-07 12:59:42 -07:00
cache-tree.h
cache.h alternates: use a separate scratch space 2016-10-10 13:52:36 -07:00
check-builtins.sh
check-racy.c
check_bindir
color.c Merge branch 'jk/squelch-false-warning-from-gcc-o3' into maint 2016-09-19 13:51:41 -07:00
color.h
column.c
column.h
combine-diff.c
command-list.txt
commit-slab.h
commit.c Merge branch 'rs/copy-array' 2016-10-03 13:30:33 -07:00
commit.h
common-main.c
config.c Merge branch 'jk/setup-sequence-update' 2016-09-21 15:15:24 -07:00
config.mak.in
config.mak.uname
configure.ac
connect.c Merge branch 'va/i18n-more' 2016-09-26 16:09:18 -07:00
connect.h
connected.c
connected.h
convert.c
convert.h
copy.c
credential-cache--daemon.c
credential-cache.c
credential-store.c
credential.c
credential.h
csum-file.c
csum-file.h
ctype.c
daemon.c Merge branch 'jk/common-main' into maint 2016-09-08 21:35:51 -07:00
date.c
decorate.c
decorate.h
delta.h
diff-delta.c
diff-lib.c cache: convert struct cache_entry to use struct object_id 2016-09-07 12:59:42 -07:00
diff-no-index.c Merge branch 'jk/setup-sequence-update' 2016-09-21 15:15:24 -07:00
diff.c Merge branch 'js/regexec-buf' into maint 2016-09-29 16:49:45 -07:00
diff.h Merge branch 'mh/diff-indent-heuristic' 2016-09-26 16:09:16 -07:00
diffcore-break.c
diffcore-delta.c
diffcore-order.c
diffcore-pickaxe.c Merge branch 'js/regexec-buf' into maint 2016-09-29 16:49:45 -07:00
diffcore-rename.c
diffcore.h
dir-iterator.c
dir-iterator.h
dir.c cache: convert struct cache_entry to use struct object_id 2016-09-07 12:59:42 -07:00
dir.h
editor.c
entry.c streaming: make stream_blob_to_fd take struct object_id 2016-09-07 12:59:42 -07:00
environment.c Merge branch 'jk/setup-sequence-update' 2016-09-21 15:15:24 -07:00
exec_cmd.c
exec_cmd.h
fast-import.c
fetch-pack.c fetch-pack: do not reset in_vain on non-novel acks 2016-09-23 12:37:45 -07:00
fetch-pack.h
fmt-merge-msg.h
fsck.c fsck: handle bad trees like other errors 2016-09-27 14:09:10 -07:00
fsck.h
generate-cmdlist.sh
gettext.c
gettext.h
git-add--interactive.perl diff: improve positioning of add/delete blocks in diffs 2016-09-19 10:25:11 -07:00
git-archimport.perl
git-bisect.sh
git-compat-util.h Merge branch 'rs/copy-array' 2016-10-03 13:30:33 -07:00
git-cvsexportcommit.perl
git-cvsimport.perl
git-cvsserver.perl
git-difftool--helper.sh
git-difftool.perl
git-filter-branch.sh
git-instaweb.sh
git-merge-octopus.sh git-merge-octopus: do not capitalize "octopus" 2016-09-08 12:17:10 -07:00
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
git-rebase--interactive.sh Merge branch 'rt/rebase-i-broken-insn-advise' into maint 2016-09-29 16:49:46 -07:00
git-rebase--merge.sh
git-rebase.sh
git-relink.perl
git-remote-testgit.sh
git-request-pull.sh
git-send-email.perl
git-sh-i18n.sh
git-sh-setup.sh
git-stash.sh i18n: stash: mark messages for translation 2016-09-21 10:20:43 -07:00
git-submodule.sh clone: pass --progress decision to recursive submodules 2016-09-22 11:22:47 -07:00
git-svn.perl
git-web--browse.sh
git.c Merge branch 'jk/setup-sequence-update' 2016-09-21 15:15:24 -07:00
git.rc
gpg-interface.c
gpg-interface.h
graph.c graph: add support for --line-prefix on all graph-aware output 2016-08-31 18:07:09 -07:00
graph.h graph: add support for --line-prefix on all graph-aware output 2016-08-31 18:07:09 -07:00
grep.c Merge branch 'js/regexec-buf' into maint 2016-09-29 16:49:45 -07:00
grep.h
hashmap.c
hashmap.h
help.c
help.h
hex.c Merge branch 'rs/hex2chr' into maint 2016-09-19 13:51:43 -07:00
http-backend.c
http-fetch.c
http-push.c Merge branch 'jk/common-main' into maint 2016-09-08 21:35:51 -07:00
http-walker.c
http.c Merge branch 'ew/http-do-not-forget-to-call-curl-multi-remove-handle' into maint 2016-09-29 16:49:39 -07:00
http.h
ident.c Merge branch 'jk/ident-ai-canonname-could-be-null' into maint 2016-10-03 13:22:32 -07:00
imap-send.c
iterator.h
khash.h
kwset.c
kwset.h
levenshtein.c
levenshtein.h
line-log.c
line-log.h
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 graph: add support for --line-prefix on all graph-aware output 2016-08-31 18:07:09 -07:00
log-tree.h
mailinfo.c Merge branch 'kd/mailinfo-quoted-string' 2016-10-03 13:30:38 -07:00
mailinfo.h mailinfo: handle in-body header continuations 2016-09-21 10:23:11 -07:00
mailmap.c
mailmap.h
match-trees.c
merge-blobs.c
merge-blobs.h
merge-recursive.c Merge branch 'rs/cocci' 2016-09-26 16:09:14 -07:00
merge-recursive.h
merge.c sequencer: lib'ify checkout_fast_forward() 2016-09-09 11:24:52 -07:00
mergesort.c
mergesort.h
mru.c
mru.h
name-hash.c
notes-cache.c
notes-cache.h
notes-merge.c Merge branch 'va/i18n-more' 2016-09-26 16:09:18 -07:00
notes-merge.h
notes-utils.c
notes-utils.h
notes.c notes: convert init_notes to use struct object_id 2016-09-07 12:59:42 -07:00
notes.h
object.c
object.h
pack-bitmap-write.c
pack-bitmap.c
pack-bitmap.h
pack-check.c Merge branch 'jk/verify-packfile-gently' 2016-09-29 16:57:13 -07:00
pack-objects.c
pack-objects.h
pack-revindex.c use COPY_ARRAY 2016-09-25 16:44:13 -07:00
pack-revindex.h
pack-write.c
pack.h
pager.c Merge branch 'jk/setup-sequence-update' 2016-09-21 15:15:24 -07:00
parse-options-cb.c Merge branch 'mh/diff-indent-heuristic' 2016-09-26 16:09:16 -07:00
parse-options.c
parse-options.h Merge branch 'mh/diff-indent-heuristic' 2016-09-26 16:09:16 -07:00
patch-delta.c
patch-ids.c patch-ids: refuse to compute patch-id for merge commit 2016-09-12 13:45:01 -07:00
patch-ids.h
path.c Merge branch 'jk/diff-submodule-diff-inline' 2016-09-12 15:34:31 -07:00
pathspec.c use COPY_ARRAY 2016-09-25 16:44:13 -07:00
pathspec.h Merge branch 'bw/pathspec-remove-unused-extern-decl' into maint 2016-09-29 16:49:34 -07:00
pkt-line.c introduce hex2chr() for converting two hexadecimal digits to a character 2016-09-07 10:42:46 -07:00
pkt-line.h
preload-index.c
pretty.c Merge branch 'rs/c-auto-resets-attributes' 2016-09-26 16:09:15 -07:00
prio-queue.c
prio-queue.h
progress.c
progress.h
prompt.c
prompt.h
quote.c
quote.h
reachable.c
reachable.h
read-cache.c Merge branch 'tg/add-chmod+x-fix' into maint 2016-09-29 16:49:47 -07:00
ref-filter.c introduce hex2chr() for converting two hexadecimal digits to a character 2016-09-07 10:42:46 -07:00
ref-filter.h
reflog-walk.c
reflog-walk.h
refs.c Merge branch 'bc/object-id' 2016-09-19 13:47:19 -07:00
refs.h Merge branch 'bc/object-id' 2016-09-19 13:47:19 -07:00
remote-curl.c
remote-testsvn.c
remote.c use strbuf_addstr() for adding constant strings to a strbuf, part 2 2016-09-15 12:23:38 -07:00
remote.h Merge branch 'jk/push-force-with-lease-creation' into maint 2016-09-08 21:35:53 -07:00
replace_object.c
rerere.c cache: convert struct cache_entry to use struct object_id 2016-09-07 12:59:42 -07:00
rerere.h
resolve-undo.c cache: convert struct cache_entry to use struct object_id 2016-09-07 12:59:42 -07:00
resolve-undo.h
revision.c cache: convert struct cache_entry to use struct object_id 2016-09-07 12:59:42 -07:00
revision.h
run-command.c
run-command.h
send-pack.c
send-pack.h
sequencer.c sequencer: ensure to release the lock when we could not read the index 2016-09-09 11:24:52 -07:00
sequencer.h
server-info.c
setup.c
sh-i18n--envsubst.c
sha1-array.c
sha1-array.h
sha1-lookup.c
sha1-lookup.h
sha1_file.c alternates: use a separate scratch space 2016-10-10 13:52:36 -07:00
sha1_name.c alternates: use a separate scratch space 2016-10-10 13:52:36 -07:00
shallow.c
shell.c
shortlog.h
show-index.c
sideband.c
sideband.h
sigchain.c
sigchain.h
split-index.c use COPY_ARRAY 2016-09-25 16:44:13 -07:00
split-index.h
strbuf.c link_alt_odb_entry: handle normalize_path errors 2016-10-10 13:52:36 -07:00
strbuf.h link_alt_odb_entry: handle normalize_path errors 2016-10-10 13:52:36 -07:00
streaming.c Merge branch 'jc/verify-loose-object-header' 2016-10-03 13:30:36 -07:00
streaming.h streaming: make stream_blob_to_fd take struct object_id 2016-09-07 12:59:42 -07:00
string-list.c
string-list.h
submodule-config.c
submodule-config.h
submodule.c alternates: provide helper for adding to alternates list 2016-10-10 13:52:36 -07:00
submodule.h diff: teach diff to display submodule difference with an inline diff 2016-08-31 18:07:10 -07:00
symlinks.c
tag.c
tag.h
tar.h
tempfile.c
tempfile.h
thread-utils.c
thread-utils.h
trace.c
trace.h
trailer.c
trailer.h
transport-helper.c
transport.c alternates: use a separate scratch space 2016-10-10 13:52:36 -07:00
transport.h
tree-diff.c
tree-walk.c fsck: handle bad trees like other errors 2016-09-27 14:09:10 -07:00
tree-walk.h fsck: handle bad trees like other errors 2016-09-27 14:09:10 -07:00
tree.c cache: convert struct cache_entry to use struct object_id 2016-09-07 12:59:42 -07:00
tree.h
unicode_width.h
unimplemented.sh
unix-socket.c
unix-socket.h
unpack-trees.c Merge branch 'rs/unpack-trees-reduce-file-scope-global' into maint 2016-09-29 16:49:36 -07:00
unpack-trees.h
update_unicode.sh
upload-pack.c Merge branch 'jk/common-main' into maint 2016-09-08 21:35:51 -07:00
url.c introduce hex2chr() for converting two hexadecimal digits to a character 2016-09-07 10:42:46 -07:00
url.h
urlmatch.c
urlmatch.h
usage.c Merge branch 'cc/apply-am' 2016-09-19 13:47:18 -07:00
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 Merge branch 'rs/cocci' 2016-09-26 16:09:14 -07:00
wt-status.h
xdiff-interface.c Merge branch 'js/regexec-buf' into maint 2016-09-29 16:49:45 -07:00
xdiff-interface.h Convert read_mmblob to take struct object_id. 2016-09-07 12:59:42 -07:00
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 http://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 http://news.gmane.org/gmane.comp.version-control.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