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Jeff King 348d4f2fc5 filter-branch: skip index read/write when possible
If the user specifies an index filter but not a tree filter,
filter-branch cleverly avoids checking out the tree
entirely. But we don't do the next level of optimization: if
you have no index or tree filter, we do not need to read the
index at all.

This can greatly speed up cases where we are only changing
the commit objects (e.g., cementing a graft into place).
Here are numbers from the newly-added perf test:

  Test                  HEAD^              HEAD
  ---------------------------------------------------------------
  7000.2: noop filter   13.81(4.95+0.83)   5.43(0.42+0.43) -60.7%

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-11-06 09:35:49 -08:00
block-sha1
builtin Merge branch 'ea/checkout-progress' 2015-11-05 15:24:28 -08:00
compat Merge branch 'js/misc-fixes' into maint 2015-11-05 12:18:13 -08:00
contrib Merge branch 'pt/pull-builtin' into maint 2015-10-16 14:32:32 -07:00
Documentation Eleventh batch for 2.7 2015-11-05 15:26:08 -08:00
ewah
git-gui
gitk-git Merge git://ozlabs.org/~paulus/gitk 2015-10-30 09:02:27 -07:00
gitweb
mergetools
perl
po Merge https://github.com/vnwildman/gitk 2015-10-30 21:01:55 +11:00
ppc
t filter-branch: skip index read/write when possible 2015-11-06 09:35:49 -08:00
templates
vcs-svn
xdiff
.gitattributes
.gitignore
.mailmap mailmap: update my entry with new email address 2015-09-16 09:08:48 -07:00
abspath.c
aclocal.m4
advice.c merge: grammofix in please-commit-before-merge message 2015-10-02 14:29:56 -07:00
advice.h
alias.c
alloc.c
archive-tar.c archive-tar: use xsnprintf for trivial formatting 2015-09-25 10:18:18 -07:00
archive-zip.c
archive.c avoid sprintf and strcpy with flex arrays 2015-10-05 11:08:05 -07:00
archive.h
argv-array.c
argv-array.h
attr.c
attr.h
base85.c
bisect.c Merge branch 'ad/bisect-terms' 2015-10-05 12:30:06 -07:00
bisect.h
blob.c
blob.h
branch.c worktree: add top-level worktree.c 2015-10-02 13:07:38 -07:00
branch.h worktree: add top-level worktree.c 2015-10-02 13:07:38 -07:00
builtin.h Merge branch 'sb/submodule-helper' 2015-10-05 12:30:19 -07:00
bulk-checkin.c use xsnprintf for generating git object headers 2015-09-25 10:18:18 -07:00
bulk-checkin.h
bundle.c
bundle.h
cache-tree.c
cache-tree.h
cache.h Merge branch 'dt/name-hash-dir-entry-fix' into maint 2015-11-03 15:32:40 -08:00
check-builtins.sh
check-racy.c
check_bindir
color.c color: add color_set helper for copying raw colors 2015-10-05 11:08:05 -07:00
color.h color: add color_set helper for copying raw colors 2015-10-05 11:08:05 -07:00
column.c
column.h
combine-diff.c Sync with 2.4.10 2015-09-28 15:33:56 -07:00
command-list.txt
commit-slab.h
commit.c Merge branch 'rs/pop-commit' 2015-10-30 13:07:03 -07:00
commit.h
config.c
config.mak.in
config.mak.uname Makefile: drop D_INO_IN_DIRENT build knob 2015-10-05 11:08:06 -07:00
configure.ac Merge branch 'rp/link-curl-before-ssl' 2015-10-29 13:59:20 -07:00
connect.c Merge branch 'jk/war-on-sprintf' 2015-10-20 15:24:01 -07:00
connect.h
connected.c
connected.h
convert.c convert trivial sprintf / strcpy calls to xsnprintf 2015-09-25 10:18:18 -07:00
convert.h
copy.c
COPYING
credential-cache--daemon.c credential-cache--daemon: remove unused #include "sigchain.h" 2015-10-22 11:12:37 -07:00
credential-cache.c am, credential-cache: add angle brackets to usage string 2015-10-16 10:43:41 -07:00
credential-store.c
credential.c
credential.h
csum-file.c
csum-file.h
ctype.c
daemon.c Merge branch 'rs/daemon-plug-child-leak' into maint 2015-11-05 12:18:17 -08:00
date.c
decorate.c
decorate.h
delta.h
diff-delta.c
diff-lib.c
diff-no-index.c use strbuf_complete to conditionally append slash 2015-10-05 11:08:06 -07:00
diff.c Merge branch 'tk/sigchain-unnecessary-post-tempfile' 2015-10-29 13:59:18 -07:00
diff.h
diffcore-break.c
diffcore-delta.c
diffcore-order.c
diffcore-pickaxe.c react to errors in xdi_diff 2015-09-28 14:57:10 -07:00
diffcore-rename.c
diffcore.h
dir.c Merge branch 'dt/name-hash-dir-entry-fix' into maint 2015-11-03 15:32:40 -08:00
dir.h
editor.c
entry.c entry.c: convert strcpy to xsnprintf 2015-09-25 10:18:18 -07:00
environment.c Merge branch 'jk/repository-extension' into maint 2015-11-03 15:32:25 -08:00
exec_cmd.c
exec_cmd.h
fast-import.c Merge branch 'jk/war-on-sprintf' 2015-10-20 15:24:01 -07:00
fetch-pack.c fetch-pack: use argv_array for index-pack / unpack-objects 2015-10-05 11:08:05 -07:00
fetch-pack.h
fmt-merge-msg.h
fsck.c
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 'js/misc-fixes' into maint 2015-11-05 12:18:13 -08:00
git-cvsexportcommit.perl
git-cvsimport.perl
git-cvsserver.perl
git-difftool--helper.sh
git-difftool.perl difftool: ignore symbolic links in use_wt_file 2015-10-29 13:43:10 -07:00
git-filter-branch.sh filter-branch: skip index read/write when possible 2015-11-06 09:35:49 -08:00
git-instaweb.sh
git-merge-octopus.sh
git-merge-one-file.sh merge: detect delete/modechange conflict 2015-10-26 14:49:31 -07:00
git-merge-resolve.sh
git-mergetool--lib.sh
git-mergetool.sh
git-p4.py Merge branch 'ls/p4-translation-failure' into maint 2015-11-03 15:32:32 -08:00
git-parse-remote.sh
git-quiltimport.sh
git-rebase--am.sh
git-rebase--interactive.sh Merge branch 'gr/rebase-i-drop-warn' into maint 2015-11-03 15:32:30 -08:00
git-rebase--merge.sh
git-rebase.sh Merge branch 'jk/rebase-no-autostash' 2015-10-05 12:30:22 -07:00
git-relink.perl
git-remote-testgit.sh
git-request-pull.sh
git-send-email.perl Merge branch 'sa/send-email-smtp-batch-data-limit' into maint 2015-11-05 12:18:06 -08:00
git-sh-i18n.sh
git-sh-setup.sh
git-stash.sh Merge branch 'nk/stash-show-config' 2015-10-05 12:30:10 -07:00
git-submodule.sh Sync with 2.6.1 2015-10-05 13:20:08 -07:00
git-svn.perl
GIT-VERSION-GEN Git 2.6.3 2015-11-05 12:20:34 -08:00
git-web--browse.sh
git.c Merge branch 'sb/submodule-helper' 2015-10-05 12:30:19 -07:00
git.rc
git.spec.in
gpg-interface.c
gpg-interface.h
graph.c
graph.h
grep.c color: add color_set helper for copying raw colors 2015-10-05 11:08:05 -07:00
grep.h
hashmap.c
hashmap.h
help.c
help.h
hex.c add reentrant variants of sha1_to_hex and find_unique_abbrev 2015-09-25 10:18:18 -07:00
http-backend.c
http-fetch.c
http-push.c drop strcpy in favor of raw sha1_to_hex 2015-10-05 11:08:05 -07:00
http-walker.c http-walker: store url in a strbuf 2015-09-25 10:18:18 -07:00
http.c http: use off_t to store partial file size 2015-11-02 14:19:54 -08:00
http.h http.c: use CURLOPT_RANGE for range requests 2015-11-02 14:18:06 -08:00
ident.c
imap-send.c Merge branch 'js/imap-send-curl-compilation-fix' 2015-10-30 13:06:58 -07:00
INSTALL
khash.h
kwset.c
kwset.h
levenshtein.c
levenshtein.h
LGPL-2.1
line-log.c Sync with 2.3.10 2015-09-28 15:28:31 -07:00
line-log.h
line-range.c
line-range.h
list-objects.c
list-objects.h
ll-merge.c Merge branch 'jk/war-on-sprintf' 2015-10-20 15:24:01 -07:00
ll-merge.h
lockfile.c
lockfile.h
log-tree.c
log-tree.h
mailinfo.c mailinfo: fix passing wrong address to git_mailinfo_config 2015-11-01 10:29:40 -08:00
mailinfo.h mailinfo: remove calls to exit() and die() deep in the callchain 2015-10-21 15:59:34 -07:00
mailmap.c mailmap: replace strcpy with xstrdup 2015-09-25 10:18:18 -07:00
mailmap.h
Makefile Merge branch 'rp/link-curl-before-ssl' into maint 2015-11-05 12:18:09 -08:00
match-trees.c
merge-blobs.c
merge-blobs.h
merge-recursive.c Merge branch 'jk/delete-modechange-conflict' into maint 2015-11-05 12:18:11 -08:00
merge-recursive.h
merge.c
mergesort.c
mergesort.h
name-hash.c name-hash: don't reuse cache_entry in dir_entry 2015-10-21 12:47:38 -07:00
notes-cache.c
notes-cache.h
notes-merge.c
notes-merge.h
notes-utils.c
notes-utils.h
notes.c notes: document length of fanout path with a constant 2015-10-05 11:08:05 -07:00
notes.h
object.c
object.h
pack-bitmap-write.c
pack-bitmap.c use strip_suffix and xstrfmt to replace suffix 2015-09-25 10:18:18 -07:00
pack-bitmap.h
pack-check.c
pack-objects.c
pack-objects.h
pack-revindex.c Silence GCC's "cast of pointer to integer of a different size" warning 2015-10-26 13:24:03 -07:00
pack-revindex.h
pack-write.c
pack.h
pager.c Merge branch 'ti/glibc-stdio-mutex-from-signal-handler' into maint 2015-10-16 14:32:41 -07:00
parse-options-cb.c Merge branch 'kn/for-each-tag-branch' 2015-10-05 12:30:03 -07:00
parse-options.c
parse-options.h Merge branch 'kn/for-each-tag-branch' 2015-10-05 12:30:03 -07:00
patch-delta.c
patch-ids.c
patch-ids.h
path.c Merge branch 'nd/clone-linked-checkout' into maint 2015-11-05 12:18:08 -08:00
pathspec.c
pathspec.h
pkt-line.c
pkt-line.h
preload-index.c
pretty.c
prio-queue.c
prio-queue.h
progress.c stop_progress_msg: convert sprintf to xsnprintf 2015-09-25 10:18:18 -07:00
progress.h
prompt.c
prompt.h
quote.c quote: move comment before sq_quote_buf() 2015-10-07 15:12:01 -07:00
quote.h
reachable.c Merge branch 'js/gc-with-stale-symref' into maint 2015-10-20 15:22:42 -07:00
reachable.h
read-cache.c Merge branch 'dt/name-hash-dir-entry-fix' into maint 2015-11-03 15:32:40 -08:00
README
ref-filter.c Merge branch 'kn/for-each-branch' 2015-11-03 15:12:57 -08:00
ref-filter.h branch.c: use 'ref-filter' APIs 2015-09-25 08:54:54 -07:00
reflog-walk.c replace trivial malloc + sprintf / strcpy calls with xstrfmt 2015-09-25 10:18:18 -07:00
reflog-walk.h
refs.c Merge branch 'jk/war-on-sprintf' 2015-10-20 15:24:01 -07:00
refs.h Merge branch 'kn/for-each-tag' 2015-10-05 12:30:18 -07:00
RelNotes Git 2.6.3 2015-11-05 12:20:34 -08:00
remote-curl.c use alloc_ref rather than hand-allocating "struct ref" 2015-10-05 11:08:05 -07:00
remote-testsvn.c
remote.c Merge branch 'rs/pop-commit' 2015-10-30 13:07:03 -07:00
remote.h
replace_object.c
rerere.c Merge branch 'jc/rerere' 2015-10-05 12:30:05 -07:00
rerere.h Merge branch 'jc/rerere' 2015-10-05 12:30:05 -07:00
resolve-undo.c
resolve-undo.h
revision.c Merge branch 'rs/pop-commit' 2015-10-30 13:07:03 -07:00
revision.h
run-command.c Merge branch 'rs/daemon-plug-child-leak' into maint 2015-11-05 12:18:17 -08:00
run-command.h Merge branch 'rs/daemon-plug-child-leak' into maint 2015-11-05 12:18:17 -08:00
send-pack.c
send-pack.h
sequencer.c
sequencer.h
server-info.c
setup.c Merge branch 'mk/submodule-gitdir-path' into maint 2015-11-03 15:32:35 -08:00
sh-i18n--envsubst.c
sha1-array.c
sha1-array.h
sha1-lookup.c
sha1-lookup.h
sha1_file.c Merge branch 'js/misc-fixes' into maint 2015-11-05 12:18:13 -08:00
sha1_name.c diagnose_invalid_index_path: use strbuf to avoid strcpy/strcat 2015-10-05 11:08:05 -07:00
shallow.c Merge branch 'rs/pop-commit' 2015-10-30 13:07:03 -07:00
shell.c
shortlog.h
show-index.c usage: do not insist that standard input must come from a file 2015-10-16 15:27:52 -07:00
sideband.c convert trivial sprintf / strcpy calls to xsnprintf 2015-09-25 10:18:18 -07:00
sideband.h
sigchain.c
sigchain.h
split-index.c
split-index.h
strbuf.c Merge branch 'tk/stripspace' 2015-10-26 15:55:20 -07:00
strbuf.h Merge branch 'tk/stripspace' 2015-10-26 15:55:20 -07:00
streaming.c
streaming.h
string-list.c
string-list.h
submodule-config.c submodule-config: "goto" removal in parse_config() 2015-10-12 12:28:33 -07:00
submodule-config.h
submodule.c Merge branch 'jk/initialization-fix-to-add-submodule-odb' into maint 2015-11-05 12:18:14 -08:00
submodule.h
symlinks.c
tag.c convert strncpy to memcpy 2015-10-05 11:08:06 -07:00
tag.h
tar.h
tempfile.c
tempfile.h
test-chmtime.c
test-config.c
test-ctype.c
test-date.c
test-delta.c
test-dump-cache-tree.c test-dump-cache-tree: avoid overflow of cache-tree name 2015-09-25 10:18:18 -07:00
test-dump-split-index.c
test-dump-untracked-cache.c
test-genrandom.c
test-hashmap.c
test-index-version.c
test-line-buffer.c
test-match-trees.c
test-mergesort.c
test-mktemp.c
test-parse-options.c
test-path-utils.c test-path-utils.c: remove incorrect assumption 2015-10-08 18:03:50 -07:00
test-prio-queue.c
test-read-cache.c
test-regex.c
test-revision-walking.c
test-run-command.c
test-scrap-cache-tree.c
test-sha1-array.c
test-sha1.c
test-sha1.sh
test-sigchain.c
test-string-list.c
test-submodule-config.c
test-subprocess.c
test-svn-fe.c
test-urlmatch-normalization.c
test-wildmatch.c
thread-utils.c
thread-utils.h
trace.c trace: use strbuf for quote_crnl output 2015-09-25 10:18:18 -07:00
trace.h
trailer.c
trailer.h
transport-helper.c Sync with v2.5.4 2015-09-28 19:16:54 -07:00
transport.c Merge branch 'jk/war-on-sprintf' 2015-10-20 15:24:01 -07:00
transport.h Sync with v2.5.4 2015-09-28 19:16:54 -07:00
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 replace trivial malloc + sprintf / strcpy calls with xstrfmt 2015-09-25 10:18:18 -07:00
unpack-trees.h
update_unicode.sh
upload-pack.c use pop_commit() for consuming the first entry of a struct commit_list 2015-10-26 14:06:46 -07:00
url.c use strbuf_complete to conditionally append slash 2015-10-05 11:08:06 -07:00
url.h
urlmatch.c
urlmatch.h
usage.c
userdiff.c
userdiff.h
utf8.c utf8: add function to align a string into given strbuf 2015-09-17 10:02:48 -07:00
utf8.h utf8: add function to align a string into given strbuf 2015-09-17 10:02:48 -07:00
varint.c
varint.h
version.c
version.h
versioncmp.c
walker.c drop strcpy in favor of raw sha1_to_hex 2015-10-05 11:08:05 -07:00
walker.h
wildmatch.c
wildmatch.h
worktree.c worktree: add details to the worktree struct 2015-10-08 11:57:07 -07:00
worktree.h worktree: add details to the worktree struct 2015-10-08 11:57:07 -07:00
wrap-for-bin.sh test: facilitate debugging Git executables in tests with gdb 2015-10-30 14:02:38 -07:00
wrapper.c add xsnprintf helper function 2015-09-25 10:18:18 -07:00
write_or_die.c
ws.c
wt-status.c Merge branch 'rs/wt-status-detached-branch-fix' into maint 2015-11-05 12:18:15 -08:00
wt-status.h
xdiff-interface.c xdiff: reject files larger than ~1GB 2015-09-28 14:57:23 -07:00
xdiff-interface.h xdiff: reject files larger than ~1GB 2015-09-28 14:57:23 -07:00
zlib.c

////////////////////////////////////////////////////////////////

	Git - the stupid content tracker

////////////////////////////////////////////////////////////////

"git" can mean anything, 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

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.

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).

Many Git online resources are accessible from http://git-scm.com/
including full documentation and Git related tools.

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.