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Conrad Irwin 55c4a67307 Prevent force-updating of the current branch
"git branch -M <foo> <current-branch>" allows updating the current branch
which HEAD points, without the necessary house-keeping that git reset
normally does to make this operation sensible. It also leaves the reflog
in a confusing state (you would be warned when trying to read it).

"git checkout -B <current branch> <foo>" is also partly vulnerable to this
bug; due to inconsistent pre-flight checks it would perform half of its
task and then abort just before rewriting the branch. Again this
manifested itself as the index file getting out-of-sync with HEAD.

"git branch -f" already guarded against this problem, and aborts with
a fatal error.

Update "git branch -M", "git checkout -B" and "git branch -f" to share the
same check before allowing a branch to be created. These prevent you from
updating the current branch.

We considered suggesting the use of "git reset" in the failure message
but concluded that it was not possible to discern what the user was
actually trying to do.

Signed-off-by: Conrad Irwin <conrad.irwin@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-08-22 16:00:36 -07:00
block-sha1
builtin Prevent force-updating of the current branch 2011-08-22 16:00:36 -07:00
compat Merge branch 'jc/maint-cygwin-trust-executable-bit-default' into maint 2011-08-01 14:44:13 -07:00
contrib Documentation: use [verse] for SYNOPSIS sections 2011-07-06 14:26:26 -07:00
Documentation add technical documentation about ref iteration 2011-08-22 15:01:14 -07:00
git-gui
git_remote_helpers
gitk-git
gitweb Merge branch 'jn/mime-type-with-params' into maint 2011-08-16 11:41:26 -07:00
perl
po
ppc
t Prevent force-updating of the current branch 2011-08-22 16:00:36 -07:00
templates
vcs-svn Merge branch 'rj/sparse' 2011-04-27 11:36:42 -07:00
xdiff
.gitattributes
.gitignore Makefile: Track changes to LDFLAGS and relink when necessary 2011-06-22 11:56:53 -07:00
.mailmap
abspath.c Merge branch 'js/maint-add-path-stat-pwd' into maint 2011-08-16 11:41:27 -07:00
aclocal.m4
advice.c
advice.h
alias.c
alloc.c
archive-tar.c
archive-zip.c zlib: zlib can only process 4GB at a time 2011-06-10 11:52:15 -07:00
archive.c
archive.h
attr.c
attr.h
base85.c
bisect.c bisect: refactor sha1_array into a generic sha1 list 2011-05-19 20:02:10 -07:00
bisect.h
blob.c
blob.h
branch.c Prevent force-updating of the current branch 2011-08-22 16:00:36 -07:00
branch.h Prevent force-updating of the current branch 2011-08-22 16:00:36 -07:00
builtin.h
bundle.c
bundle.h
cache-tree.c
cache-tree.h
cache.h Merge branch 'jc/zlib-wrap' into maint 2011-08-16 11:23:26 -07:00
check-builtins.sh
check-racy.c
check_bindir
color.c
color.h
combine-diff.c combine-diff: respect textconv attributes 2011-05-24 09:08:17 -07:00
command-list.txt
commit.c
commit.h Merge branch 'jk/format-patch-am' 2011-05-31 12:19:11 -07:00
config.c git-config: Remove extra whitespaces 2011-07-19 13:43:34 -07:00
config.mak.in Merge branch 'kk/maint-prefix-in-config-mak' into maint 2011-06-01 14:02:39 -07:00
configure.ac configure: Check for libpcre 2011-05-09 16:29:46 -07:00
connect.c connect: correctly number ipv6 network adapter 2011-08-01 10:47:36 -07:00
convert.c convert: make it harder to screw up adding a conversion attribute 2011-05-09 14:59:09 -07:00
copy.c
COPYING
csum-file.c
csum-file.h
ctype.c
daemon.c
date.c
decorate.c
decorate.h
delta.h
diff-delta.c
diff-lib.c Merge branch 'jc/maint-reset-unmerged-path' into maint 2011-08-16 11:41:28 -07:00
diff-no-index.c
diff.c Merge branch 'jc/zlib-wrap' into maint 2011-08-16 11:23:26 -07:00
diff.h Merge branch 'jk/diff-not-so-quick' 2011-06-06 11:40:14 -07:00
diffcore-break.c
diffcore-delta.c
diffcore-order.c
diffcore-pickaxe.c
diffcore-rename.c diffcore-rename.c: avoid set-but-not-used warning 2011-06-01 13:54:17 -07:00
diffcore.h
dir.c Merge branch 'nd/struct-pathspec' 2011-05-06 10:50:06 -07:00
dir.h Merge branch 'nd/maint-setup' 2011-05-02 15:58:30 -07:00
editor.c
entry.c
environment.c Merge branch 'jc/replacing' 2011-05-19 20:37:21 -07:00
exec_cmd.c
exec_cmd.h
fast-import.c zlib: zlib can only process 4GB at a time 2011-06-10 11:52:15 -07:00
fetch-pack.h
fixup-builtins
fsck.c Merge branch 'jm/maint-misc-fix' into maint 2011-05-30 00:09:41 -07:00
fsck.h
generate-cmdlist.sh
gettext.c
gettext.h
git-add--interactive.perl add -i: ignore terminal escape sequences 2011-05-17 20:44:17 -07:00
git-am.sh am: refresh the index at start and --resolved 2011-08-16 11:15:41 -07:00
git-archimport.perl
git-bisect.sh
git-compat-util.h Merge branch 'jc/magic-pathspec' 2011-05-23 09:58:35 -07:00
git-cvsexportcommit.perl
git-cvsimport.perl Merge branch 'gr/cvsimport-alternative-cvspass-location' into maint 2011-05-13 10:44:54 -07:00
git-cvsserver.perl
git-difftool--helper.sh
git-difftool.perl
git-filter-branch.sh filter-branch: Export variable `workdir' for --commit-filter 2011-08-08 12:09:38 -07:00
git-instaweb.sh
git-lost-found.sh
git-merge-octopus.sh
git-merge-one-file.sh Merge branch 'jk/merge-one-file-working-tree' into maint 2011-05-13 10:44:19 -07:00
git-merge-resolve.sh
git-mergetool--lib.sh Pass empty file to p4merge where no base is suitable. 2011-05-01 15:56:05 -07:00
git-mergetool.sh
git-parse-remote.sh Merge branch 'mz/rebase' 2011-04-28 14:11:39 -07:00
git-pull.sh pull: remove extra space from reflog message 2011-08-01 16:05:44 -07:00
git-quiltimport.sh
git-rebase--am.sh
git-rebase--interactive.sh rebase -i -p: include non-first-parent commits in todo list 2011-06-19 14:37:23 -07:00
git-rebase--merge.sh
git-rebase.sh rebase: clarify "restore the original branch" 2011-07-13 22:03:12 -07:00
git-relink.perl
git-remote-testgit.py
git-repack.sh
git-request-pull.sh
git-send-email.perl git-send-email: fix missing space in error message 2011-04-29 11:34:32 -07:00
git-sh-i18n.sh git-sh-i18n.sh: add GIT_GETTEXT_POISON support 2011-05-14 20:29:11 -07:00
git-sh-setup.sh require-work-tree wants more than what its name says 2011-05-24 11:34:40 -07:00
git-stash.sh Merge branch 'jk/maint-stash-oob' into maint 2011-05-04 14:58:42 -07:00
git-submodule.sh Merge branch 'jl/submodule-update-quiet' into maint 2011-08-16 12:41:14 -07:00
git-svn.perl git-svn: Correctly handle root commits in mergeinfo ranges 2011-06-28 03:26:11 +00:00
GIT-VERSION-GEN Git 1.7.6 2011-06-26 12:41:16 -07:00
git-web--browse.sh
git.c Merge branch 'jk/maint-config-alias-fix' into maint 2011-06-01 14:05:22 -07:00
git.spec.in
graph.c
graph.h
grep.c git-grep: Learn PCRE 2011-05-09 16:29:33 -07:00
grep.h git-grep: Learn PCRE 2011-05-09 16:29:33 -07:00
hash.c
hash.h
help.c help_unknown_cmd: do not propose an "unknown" cmd 2011-07-08 08:59:44 -07:00
help.h
hex.c
http-backend.c zlib: zlib can only process 4GB at a time 2011-06-10 11:52:15 -07:00
http-fetch.c
http-push.c Merge branch 'jc/zlib-wrap' into maint 2011-08-16 11:23:26 -07:00
http-walker.c http: make curl callbacks match contracts from curl header 2011-05-04 13:30:28 -07:00
http.c Merge branch 'sp/maint-clear-postfields' into maint 2011-05-04 14:58:56 -07:00
http.h Merge branch 'jc/zlib-wrap' into maint 2011-08-16 11:23:26 -07:00
ident.c Merge branch 'rg/no-gecos-in-pwent' 2011-05-26 10:32:19 -07:00
imap-send.c
INSTALL
levenshtein.c
levenshtein.h
LGPL-2.1 provide a copy of the LGPLv2.1 2011-05-19 18:23:17 -07:00
list-objects.c Merge branch 'nd/struct-pathspec' 2011-05-06 10:50:06 -07:00
list-objects.h
ll-merge.c
ll-merge.h
lockfile.c
log-tree.c Merge branch 'jk/format-patch-am' 2011-05-31 12:19:11 -07:00
log-tree.h
mailmap.c
mailmap.h
Makefile Makefile: Track changes to LDFLAGS and relink when necessary 2011-06-22 11:56:53 -07:00
match-trees.c
merge-file.c
merge-file.h
merge-recursive.c Merge branch 'jc/rename-degrade-cc-to-c' into maint 2011-05-31 12:00:02 -07:00
merge-recursive.h
name-hash.c
notes-cache.c
notes-cache.h
notes-merge.c index_fd(): turn write_object and format_check arguments into one flag 2011-05-09 11:58:19 -07:00
notes-merge.h
notes.c Do not use C++-style comments 2011-08-22 10:07:07 -07:00
notes.h
object.c read_sha1_file(): get rid of read_sha1_file_repl() madness 2011-05-15 15:23:33 -07:00
object.h
pack-check.c zlib: zlib can only process 4GB at a time 2011-06-10 11:52:15 -07:00
pack-refs.c
pack-refs.h
pack-revindex.c
pack-revindex.h
pack-write.c
pack.h
pager.c
parse-options.c
parse-options.h
patch-delta.c
patch-ids.c
patch-ids.h
path.c
pkt-line.c
pkt-line.h
preload-index.c
pretty.c Merge branch 'jk/format-patch-am' 2011-05-31 12:19:11 -07:00
progress.c
progress.h
quote.c
quote.h
reachable.c
reachable.h
read-cache.c index_fd(): turn write_object and format_check arguments into one flag 2011-05-09 11:58:19 -07:00
README
reflog-walk.c
reflog-walk.h
refs.c Merge branch 'jc/maint-1.7.3-checkout-describe' into maint 2011-08-01 14:43:18 -07:00
refs.h Merge branch 'jc/maint-1.7.3-checkout-describe' into maint 2011-08-01 14:43:18 -07:00
RelNotes Prepare for 1.7.6.1 2011-08-16 12:42:17 -07:00
remote-curl.c Merge branch 'jc/zlib-wrap' into maint 2011-08-16 11:23:26 -07:00
remote.c
remote.h
replace_object.c inline lookup_replace_object() calls 2011-05-15 15:23:33 -07:00
rerere.c Merge branch 'maint' 2011-05-30 00:09:55 -07:00
rerere.h rerere: libify rerere_clear() and rerere_gc() 2011-05-08 12:55:34 -07:00
resolve-undo.c
resolve-undo.h
revision.c Merge branch 'jc/notes-batch-removal' 2011-05-29 23:51:26 -07:00
revision.h Merge branch 'jk/format-patch-am' 2011-05-31 12:19:11 -07:00
run-command.c
run-command.h
send-pack.h
server-info.c
setup.c Merge branch 'maint' 2011-05-30 00:09:55 -07:00
sh-i18n--envsubst.c Merge branch 'ab/i18n-scripts-basic' 2011-06-17 11:40:32 -07:00
sha1-array.c receive-pack: eliminate duplicate .have refs 2011-05-19 20:02:31 -07:00
sha1-array.h receive-pack: eliminate duplicate .have refs 2011-05-19 20:02:31 -07:00
sha1-lookup.c
sha1-lookup.h
sha1_file.c Merge branch 'jc/zlib-wrap' into maint 2011-08-16 11:23:26 -07:00
sha1_name.c Merge branch 'jc/magic-pathspec' 2011-05-23 09:58:35 -07:00
shallow.c
shell.c shell: add missing initialization of argv0_path 2011-05-05 09:32:28 -07:00
shortlog.h
show-index.c
sideband.c
sideband.h
sigchain.c
sigchain.h
strbuf.c Merge branch 'ef/maint-strbuf-init' 2011-04-27 11:36:43 -07:00
strbuf.h
string-list.c
string-list.h
submodule.c Merge branch 'jl/maint-fetch-recursive-fix' into maint 2011-08-01 14:44:17 -07:00
submodule.h
symlinks.c
tag.c
tag.h
tar.h
test-chmtime.c
test-ctype.c
test-date.c
test-delta.c
test-dump-cache-tree.c
test-genrandom.c
test-index-version.c
test-line-buffer.c
test-match-trees.c
test-mktemp.c
test-obj-pool.c
test-parse-options.c
test-path-utils.c
test-run-command.c
test-sha1.c
test-sha1.sh
test-sigchain.c
test-string-pool.c
test-subprocess.c
test-svn-fe.c
test-treap.c
thread-utils.c
thread-utils.h
trace.c
transport-helper.c
transport.c Merge branch 'maint' 2011-05-30 00:09:55 -07:00
transport.h refactor refs_from_alternate_cb to allow passing extra data 2011-05-19 20:01:10 -07:00
tree-diff.c Merge branch 'jk/diff-not-so-quick' 2011-06-06 11:40:14 -07:00
tree-walk.c
tree-walk.h
tree.c
tree.h
unimplemented.sh
unpack-trees.c Merge branch 'jc/diff-index-quick-exit-early' into maint 2011-08-16 11:23:25 -07:00
unpack-trees.h Merge branch 'jc/diff-index-quick-exit-early' into maint 2011-08-16 11:23:25 -07:00
upload-pack.c Merge branch 'jk/maint-upload-pack-shallow' into maint 2011-05-04 14:58:13 -07:00
url.c
url.h
usage.c
userdiff.c Merge branch 'jk/combine-diff-binary-etc' into maint 2011-08-16 11:23:24 -07:00
userdiff.h refactor get_textconv to not require diff_filespec 2011-05-23 15:46:02 -07:00
utf8.c
utf8.h
walker.c
walker.h
wrap-for-bin.sh
wrapper.c read_in_full: always report errors 2011-05-26 13:54:18 -07:00
write_or_die.c
ws.c
wt-status.c
wt-status.h
xdiff-interface.c add, merge, diff: do not use strcasecmp to compare config variable names 2011-05-14 18:53:39 -07:00
xdiff-interface.h
zlib.c zlib: allow feeding more than 4GB in one go 2011-06-10 16:17:19 -07:00

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

	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.
It was originally written by Linus Torvalds with help of a group of
hackers around the net. It is currently maintained by Junio C Hamano.

Please read the file INSTALL for installation instructions.

See Documentation/gittutorial.txt to get started, then see
Documentation/everyday.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. 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://marc.theaimsgroup.com/?l=git and other archival sites.

The messages titled "A note from the maintainer", "What's in
git.git (stable)" and "What's cooking in git.git (topics)" and
the discussion following them on the mailing list give a good
reference for project status, development direction and
remaining tasks.