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Junio C Hamano e2eb527345 require-work-tree wants more than what its name says
Somebody tried "git pull" from a random place completely outside the work
tree, while exporting GIT_DIR and GIT_WORK_TREE that are set to correct
places, e.g.

    GIT_WORK_TREE=$HOME/git.git
    GIT_DIR=$GIT_WORK_TREE/.git
    export GIT_WORK_TREE GIT_DIR
    cd /tmp
    git pull

At the beginning of git-pull, we check "require-work-tree" and then
"cd-to-toplevel".  I _think_ the original intention when I wrote the
command was "we MUST have a work tree, our $(cwd) might not be at the
top-level directory of it", and no stronger than that.  That check is a
very sensible thing to do before doing cd-to-toplevel.  We check that the
place we would want to go exists, and then go there.

But the implementation of require_work_tree we have today is quite
different.  I don't have energy to dig the history, but currently it says:

    test "$(git rev-parse --is-inside-work-tree 2>/dev/null)" = true ||
    die "fatal: $0 cannot be used without a working tree."

Which is completely bogus.  Even though we may happen to be just outside
of it right now, we may have a working tree that we can cd_to_toplevel
back to.

Add a function "require_work_tree_exists" that implements the check
this function originally intended (this is so that third-party scripts
that rely on the current behaviour do not have to get broken).

For now, update _no_ in-tree scripts, not even "git pull", as nobody on
the list seems to really care about the above corner case workflow that
triggered this. Scripts can be updated after vetting that they do want the
"we want to make sure the place we are going to go actually exists"
semantics.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-05-24 11:34:40 -07:00
block-sha1
builtin Merge branch 'ak/describe-exact' into maint 2011-01-19 08:25:52 -08:00
compat Merge branch 'rj/msvc-fix' 2010-12-16 12:55:36 -08:00
contrib Merge branch 'pd/bash-4-completion' 2010-12-22 14:40:55 -08:00
Documentation require-work-tree wants more than what its name says 2011-05-24 11:34:40 -07:00
git-gui
git_remote_helpers
gitk-git Merge branch 'maint' 2011-01-08 23:48:47 -08:00
gitweb Don't pass "--xhtml" to hightlight in gitweb.perl script. 2011-01-27 12:13:07 -08:00
perl
ppc
t Merge branch 'maint' 2011-01-27 10:27:49 -08:00
templates
vcs-svn svndump.c: Fix a printf format compiler warning 2011-01-18 16:48:47 -08:00
xdiff
.gitattributes
.gitignore Merge branch 'nd/setup' 2010-12-28 11:26:55 -08:00
.mailmap
abspath.c
aclocal.m4
advice.c
advice.h
alias.c
alloc.c
archive-tar.c
archive-zip.c
archive.c
archive.h
attr.c
attr.h
base85.c
bisect.c
bisect.h
blob.c
blob.h
branch.c
branch.h
builtin.h Merge branch 'il/remote-fd-ext' 2010-12-08 11:24:14 -08:00
bundle.c
bundle.h
cache-tree.c
cache-tree.h
cache.h Merge branch 'nd/setup' 2010-12-28 11:26:55 -08:00
check-builtins.sh
check-racy.c
check_bindir
color.c default color.status.branch to "same as header" 2010-12-10 12:59:52 -08:00
color.h default color.status.branch to "same as header" 2010-12-10 12:59:52 -08:00
combine-diff.c
command-list.txt
commit.c Merge branch 'tf/commit-list-prefix' 2010-12-22 14:40:17 -08:00
commit.h Merge branch 'tf/commit-list-prefix' 2010-12-22 14:40:17 -08:00
config.c Merge branch 'nd/setup' 2010-12-28 11:26:55 -08:00
config.mak.in Merge branch 'jk/asciidoc-update' 2010-12-12 21:49:51 -08:00
configure.ac Merge branch 'jk/asciidoc-update' 2010-12-12 21:49:51 -08:00
connect.c
convert.c convert filter: supply path to external driver 2010-12-22 10:19:32 -08:00
copy.c
COPYING
csum-file.c
csum-file.h
ctype.c
daemon.c daemon: support <directory> arguments again 2011-01-04 11:23:42 -08:00
date.c
decorate.c
decorate.h
delta.h
diff-delta.c
diff-lib.c
diff-no-index.c
diff.c Merge branch 'ks/blame-worktree-textconv-cached' 2010-12-21 14:30:52 -08:00
diff.h
diffcore-break.c
diffcore-delta.c
diffcore-order.c
diffcore-pickaxe.c
diffcore-rename.c
diffcore.h
dir.c Merge branch 'nd/maint-relative' into maint 2011-01-19 08:25:31 -08:00
dir.h Merge branch 'nd/maint-fix-add-typo-detection' 2010-12-22 14:40:26 -08:00
editor.c
entry.c
environment.c Merge branch 'nd/setup' 2010-12-28 11:26:55 -08:00
exec_cmd.c exec_cmd: remove unused extern 2011-01-19 08:27:22 -08:00
exec_cmd.h
fast-import.c Merge branch 'maint' 2011-01-27 10:27:49 -08:00
fetch-pack.h
fixup-builtins
fsck.c
fsck.h
generate-cmdlist.sh
git-add--interactive.perl Merge branch 'jl/add-p-reverse-message' into maint 2010-12-09 10:36:47 -08:00
git-am.sh Merge branch 'jc/maint-rebase-rewrite-last-skip' into maint 2010-12-28 13:43:10 -08:00
git-archimport.perl
git-bisect.sh
git-compat-util.h Merge branch 'jn/thinner-wrapper' 2010-12-03 16:13:06 -08:00
git-cvsexportcommit.perl
git-cvsimport.perl Merge branch 'mg/cvsimport' 2011-01-05 13:30:29 -08:00
git-cvsserver.perl
git-difftool--helper.sh difftool: provide basename to external tools 2010-12-16 13:01:36 -08:00
git-difftool.perl difftool: Fix failure on Cygwin 2010-12-14 11:13:41 -08:00
git-filter-branch.sh
git-instaweb.sh
git-lost-found.sh
git-merge-octopus.sh
git-merge-one-file.sh
git-merge-resolve.sh
git-mergetool--lib.sh
git-mergetool.sh
git-parse-remote.sh Merge branch 'mz/pull-rebase-rebased' 2010-12-12 21:49:51 -08:00
git-pull.sh Merge branch 'jl/fetch-submodule-recursive' 2010-12-16 12:57:15 -08:00
git-quiltimport.sh
git-rebase--interactive.sh Merge branch 'maint' 2011-01-27 10:27:49 -08:00
git-rebase.sh Merge branch 'maint' 2011-01-27 10:27:49 -08:00
git-relink.perl Merge branch 'ab/require-perl-5.8' into maint 2010-12-09 10:35:21 -08:00
git-remote-testgit.py
git-repack.sh
git-request-pull.sh
git-send-email.perl Merge branch 'ab/require-perl-5.8' into maint 2010-12-09 10:35:21 -08:00
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
git-submodule.sh Merge branch 'tr/submodule-relative-scp-url' into maint 2011-01-19 08:26:41 -08:00
git-svn.perl git-svn: allow the mergeinfo property to be set 2010-12-10 04:09:48 +08:00
GIT-VERSION-GEN Git 1.7.4 2011-01-30 19:02:37 -08:00
git-web--browse.sh web--browse: better support for chromium 2010-12-03 14:05:32 -08:00
git.c Merge branch 'nd/setup' 2010-12-28 11:26:55 -08:00
git.spec.in
graph.c
graph.h
grep.c
grep.h
hash.c
hash.h
help.c help: always suggest common-cmds if prefix of cmd 2010-12-05 12:15:12 -08:00
help.h
hex.c
http-backend.c
http-fetch.c
http-push.c
http-walker.c
http.c Merge branch 'tc/http-urls-ends-with-slash' into maint 2010-12-14 07:36:10 -08:00
http.h
ident.c ident: die on bogus date format 2010-12-20 10:28:19 -08:00
imap-send.c
INSTALL
levenshtein.c
levenshtein.h
list-objects.c
list-objects.h
ll-merge.c ll-merge: simplify opts == NULL case 2011-01-15 20:34:14 -08:00
ll-merge.h
lockfile.c
log-tree.c
log-tree.h
mailmap.c
mailmap.h
Makefile Merge branch 'nd/setup' 2010-12-28 11:26:55 -08:00
match-trees.c
merge-file.c
merge-recursive.c
merge-recursive.h
name-hash.c
notes-cache.c
notes-cache.h
notes-merge.c
notes-merge.h
notes.c Merge branch 'jh/notes-merge' 2010-12-08 11:24:12 -08:00
notes.h Merge branch 'jh/notes-merge' 2010-12-08 11:24:12 -08:00
object.c
object.h
pack-check.c
pack-refs.c
pack-refs.h
pack-revindex.c
pack-revindex.h
pack-write.c
pack.h
pager.c
parse-options.c parse-options: make resuming easier after PARSE_OPT_STOP_AT_NON_OPTION 2010-12-07 14:19:32 -08:00
parse-options.h Merge branch 'jn/parse-options-extra' 2010-12-12 21:49:53 -08:00
patch-delta.c
patch-ids.c
patch-ids.h
path.c
pkt-line.c
pkt-line.h
preload-index.c
pretty.c
progress.c
progress.h
quote.c
quote.h
reachable.c
reachable.h
read-cache.c Merge branch 'jj/icase-directory' 2010-12-03 16:10:34 -08:00
README
reflog-walk.c Merge branch 'jk/maint-reflog-bottom' into maint 2010-12-14 07:35:50 -08:00
reflog-walk.h
refs.c
refs.h
RelNotes Prepare for 1.7.3.5 2010-12-28 13:48:54 -08:00
remote-curl.c
remote.c
remote.h
replace_object.c
rerere.c
rerere.h
resolve-undo.c
resolve-undo.h
revision.c Merge branch 'tf/commit-list-prefix' 2010-12-22 14:40:17 -08:00
revision.h
run-command.c
run-command.h
send-pack.h
server-info.c
setup.c Subject: setup: officially support --work-tree without --git-dir 2011-01-21 14:31:24 -08:00
sha1-lookup.c
sha1-lookup.h
sha1_file.c Correctly report corrupted objects 2011-01-20 13:18:51 -08:00
sha1_name.c Merge branch 'tf/commit-list-prefix' 2010-12-22 14:40:17 -08:00
shallow.c
shell.c
shortlog.h
show-index.c
sideband.c
sideband.h
sigchain.c
sigchain.h
strbuf.c
strbuf.h
string-list.c
string-list.h
submodule.c fetch_populated_submodules(): document dynamic allocation 2010-12-09 23:42:05 -08:00
submodule.h
symlinks.c do not overwrite files in leading path 2010-12-14 08:55:12 -08:00
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-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 setup_work_tree: adjust relative $GIT_WORK_TREE after moving cwd 2010-12-27 08:34:19 -08:00
test-svn-fe.c
test-treap.c treap: make treap_insert return inserted node 2010-12-07 16:03:55 -08:00
thread-utils.c
thread-utils.h thread-utils.h: simplify the inclusion 2010-12-10 12:58:06 -08:00
trace.c trace.c: ensure NULL is not passed to printf 2011-01-06 12:21:49 -08:00
transport-helper.c thread-utils.h: simplify the inclusion 2010-12-10 12:58:06 -08:00
transport.c
transport.h
tree-diff.c
tree-walk.c
tree-walk.h
tree.c
tree.h
unimplemented.sh
unpack-trees.c Merge branch 'nd/maint-fix-add-typo-detection' 2010-12-22 14:40:26 -08:00
unpack-trees.h use persistent memory for rejected paths 2010-12-14 08:55:13 -08:00
upload-pack.c
url.c
url.h
usage.c
userdiff.c Merge branch 'as/userdiff-pascal' 2011-01-24 10:54:12 -08:00
userdiff.h
utf8.c
utf8.h
walker.c
walker.h
wrap-for-bin.sh
wrapper.c set_try_to_free_routine(NULL) means "do nothing special" 2010-12-21 09:25:14 -08:00
write_or_die.c
ws.c
wt-status.c Merge branch 'aa/status-hilite-branch' 2010-12-16 12:50:03 -08:00
wt-status.h
xdiff-interface.c Merge branch 'rs/maint-diff-fd-leak' into maint 2010-12-26 11:18:39 -08:00
xdiff-interface.h
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.
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.