This is the promised cleaned-up version of teaching directory traversal
(ie the "read_directory()" logic) about subprojects. That makes "git add"
understand to add/update subprojects.

It now knows to look at the index file to see if a directory is marked as
a subproject, and use that as information as whether it should be recursed
into or not.

It also generally cleans up the handling of directory entries when
traversing the working tree, by splitting up the decision-making process
into small functions of their own, and adding a fair number of comments.

Finally, it teaches "add_file_to_cache()" that directory names can have
slashes at the end, since the directory traversal adds them to make the
difference between a file and a directory clear (it always did that, but
my previous too-ugly-to-apply subproject patch had a totally different
path for subproject directories and avoided the slash for that case).
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: NJunio C Hamano <junkio@cox.net>

This fixes a total thinko in my original series: subprojects do *not* sort
like directories, because the index is sorted purely by full pathname, and
since a subproject shows up in the index as a normal NUL-terminated
string, it never has the issues with sorting with the '/' at the end.

So if you have a subproject "proj" and a file "proj.c", the subproject
sorts alphabetically before the file in the index (and must thus also sort
that way in a tree object, since trees sort as the index).

In contrast, it you have two files "proj/file" and "proj.c", the "proj.c"
will sort alphabetically before "proj/file" in the index. The index
itself, of course, does not actually contain an entry "proj/", but in the
*tree* that gets written out, the tree entry "proj" will sort after the
file entry "proj.c", which is the only real magic sorting rule.

In other words: the magic sorting rule only affects tree entries, and
*only* affects tree entries that point to other trees (ie are of the type
S_IFDIR).

Anyway, that thinko just means that we should remove the special case to
make S_ISDIRLNK entries sort like S_ISDIR entries. They don't.  They sort
like normal files.
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: NJunio C Hamano <junkio@cox.net>

This teaches the really fundamental core SHA1 object handling routines
about gitlinks.  We can compare trees with gitlinks in them (although we
can not actually generate patches for them yet - just raw git diffs),
and they show up as commits in "git ls-tree".

We also know to compare gitlinks as if they were directories (ie the
normal "sort as trees" rules apply).

[jc: amended a cut&paste error]
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: NJunio C Hamano <junkio@cox.net>

Since the subprojects don't necessarily even exist in the current tree,
much less in the current git repository (they are totally independent
repositories), we do not want to try to follow the chain from one git
repository to another through a gitlink.

This involves teaching fsck to ignore references to gitlink objects from
a tree and from the current index.
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: NJunio C Hamano <junkio@cox.net>

This just adds the basic helper functions to recognize and work with git
tree entries that are links to other git repositories ("subprojects").
They still aren't actually connected up to any of the code-paths, but
now all the infrastructure is in place.

The next commit will start actually adding actual subproject support.
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: NJunio C Hamano <junkio@cox.net>

This new function resolves a ref in *another* git repository.  It's
named for its intended use: to look up the git link to a subproject.

It's not actually wired up to anything yet, but we're getting closer to
having fundamental plumbing support for "links" from one git directory
to another, which is the basis of subproject support.

[jc: amended a FILE* leak]
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: NJunio C Hamano <junkio@cox.net>

This just makes sure that when we do a read_directory(), we check
that the filename fits in the buffer we allocated (with a bit of
slop)
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: NJunio C Hamano <junkio@cox.net>

The diff helpers used to do the magic mode canonicalization and all the
other special mode handling by hand ("trust executable bit" and "has
symlink support" handling).

That's bogus. Use "ce_mode_from_stat()" that does this all for us.

This is also going to be required when we add support for links to other
git repositories.
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: NJunio C Hamano <junkio@cox.net>

As noted by Junio, --format=tar should be assumed if no format
was specified.
Signed-off-by: NRene Scharfe <rene.scharfe@lsrfire.ath.cx>
Signed-off-by: NJunio C Hamano <junkio@cox.net>

* jc/push:
  git-push to multiple locations does not stop at the first failure
  git-push reports the URL after failing.

* jc/merge-subtree:
  A new merge stragety 'subtree'.

It is safe to merge this early as this is a feature that user
explicitly needs to ask for and would not trigger otherwise.  A
known issue with the current implementation is that the subtree
matching heuristics is very stupid.  It could run ls-tree twice
and try to count intersection.

Giving it wider audience would help it to get improved by
motivated volunteers.
Signed-off-by: NJunio C Hamano <junkio@cox.net>

* js/fetch-progress:
  git-fetch: add --quiet

* maint:
  Add Documentation/cmd-list.made to .gitignore
  git-svn: fix log command to avoid infinite loop on long commit messages
  git-svn: dcommit/rebase confused by patches with git-svn-id: lines
  git-svn: bail out on incorrect command-line options

Noticed by Randal L. Schwartz.
Signed-off-by: NJunio C Hamano <junkio@cox.net>

This bug has been around since the the conversion to use the
Git.pm library back in October or November.  Eventually I'd like
"git rev-list/log" to have the option to not truncate overly
long messages.
Signed-off-by: NEric Wong <normalperson@yhbt.net>
Signed-off-by: NJunio C Hamano <junkio@cox.net>

When patches are merged from another git-svn managed branch,
they will have the git-svn-id: metadata line in them (generated
by git-format-patch).

When doing rebase or dcommit via git-svn, this would cause
git-svn to find the wrong upstream branch.  We now verify
that the commit is consistent with the value in the .rev_db
file.
Signed-off-by: NEric Wong <normalperson@yhbt.net>
Signed-off-by: NJunio C Hamano <junkio@cox.net>

"git svn log" is the only command that needs the pass-through
option in Getopt::Long; otherwise we will bail out and let the
user know something is wrong.

Also, avoid printing out unaccepted mixed-case options (that
are reserved for the command-line) such as --useSvmProps
in the usage() function.
Signed-off-by: NEric Wong <normalperson@yhbt.net>
Signed-off-by: NJunio C Hamano <junkio@cox.net>

Signed-off-by: NJunio C Hamano <junkio@cox.net>

* 'jc/read-tree-df' (early part):
  Fix switching to a branch with D/F when current branch has file D.
  Fix twoway_merge that passed d/f conflict marker to merged_entry().
  Fix read-tree --prefix=dir/.
  unpack-trees: get rid of *indpos parameter.
  unpack_trees.c: pass unpack_trees_options structure to keep_entry() as well.
  add_cache_entry(): removal of file foo does not conflict with foo/bar

* maint:
  Prepare for 1.5.1.1
  cvsserver: small corrections to asciidoc documentation

Signed-off-by: NJunio C Hamano <junkio@cox.net>

Fix a typo: s/Not/Note/

Some formating fixes: Use ` ` syntax for all filenames and
' ' syntax for all commandline switches.
Signed-off-by: NFrank Lichtenheld <frank@lichtenheld.de>
Signed-off-by: NJunio C Hamano <junkio@cox.net>

This merge strategy largely piggy-backs on git-merge-recursive.
When merging trees A and B, if B corresponds to a subtree of A,
B is first adjusted to match the tree structure of A, instead of
reading the trees at the same level.  This adjustment is also
done to the common ancestor tree.

If you are pulling updates from git-gui repository into git.git
repository, the root level of the former corresponds to git-gui/
subdirectory of the latter.  The tree object of git-gui's toplevel
is wrapped in a fake tree object, whose sole entry has name 'git-gui'
and records object name of the true tree, before being used by
the 3-way merge code.

If you are merging the other way, only the git-gui/ subtree of
git.git is extracted and merged into git-gui's toplevel.

The detection of corresponding subtree is done by comparing the
pathnames and types in the toplevel of the tree.

Heuristics galore!  That's the git way ;-).
Signed-off-by: NJunio C Hamano <junkio@cox.net>

When pushing into multiple repositories with git push, via
multiple URL in .git/remotes/$shorthand or multiple url
variables in [remote "$shorthand"] section, we used to stop upon
the first failure.  Continue the operation and report the
failure at the end.
Signed-off-by: NJunio C Hamano <junkio@cox.net>

This came up on #git when somebody was getting 'unable to create
./objects/tmp_oXXXX' but sweared he had write permission to that
directory.  It turned out that the repository URL was changed
and he was accessing a repository he does not have a write
permission anymore.

I am not sure how much this would have helped somebody who
believed he was accessing location when the permission of that
location was changed while he was looking the other way, though.
But giving more information on the error path would be better,
and the next change would be helped with this as well.
Signed-off-by: NJunio C Hamano <junkio@cox.net>

* jc/index-output:
  git-read-tree --index-output=<file>
  _GIT_INDEX_OUTPUT: allow plumbing to output to an alternative index file.

Conflicts:

	builtin-apply.c

* fp/make-j:
  Makefile: Add '+' to QUIET_SUBDIR0 to fix parallel make.

* cc/bisect:
  git-bisect: allow bisecting with only one bad commit.
  t6030: add a bit more tests to git-bisect
  git-bisect: modernization
  Documentation: bisect: "start" accepts one bad and many good commits
  Bisect: teach "bisect start" to optionally use one bad and many good revs.

* 'jc/checkout' (early part):
  checkout: allow detaching to HEAD even when switching to the tip of a branch

* maint:
  Documentation: tighten dependency for git.{html,txt}
  Makefile: iconv() on Darwin has the old interface
  t5300-pack-object.sh: portability issue using /usr/bin/stat
  t3200-branch.sh: small language nit
  usermanual.txt: some capitalization nits
  Make builtin-branch.c handle the git config file
  rename_ref(): only print a warning when config-file update fails
  Distinguish branches by more than case in tests.
  Avoid composing too long "References" header.
  cvsimport: Improve formating consistency
  cvsimport: Reorder options in documentation for better understanding
  cvsimport: Improve usage error reporting
  cvsimport: Improve documentation of CVSROOT and CVS module determination
  cvsimport: sync usage lines with existing options

Conflicts:

	Documentation/Makefile

Every time _any_ documentation page changed, cmds-*.txt files
were regenerated, which caused git.{html,txt} to be remade.  Try
not to update cmds-*.txt files if their new contents match the
old ones.
Signed-off-by: NJunio C Hamano <junkio@cox.net>

The libiconv on Darwin uses the old iconv() interface (2nd argument is a
const char **, instead of a char **).  Add OLD_ICONV to the Darwin
variable definitions to handle this.
Signed-off-by: NArjen Laarhoven <arjen@yaph.org>
Acked-by: NBrian Gernhardt <benji@silverinsanity.com>
Signed-off-by: NJunio C Hamano <junkio@cox.net>

In the test 'compare delta flavors', /usr/bin/stat is used to get file size.
This isn't portable.  There already is a dependency on Perl, use its '-s'
operator to get the file size.
Signed-off-by: NArjen Laarhoven <arjen@yaph.org>
Signed-off-by: NJunio C Hamano <junkio@cox.net>

This allows you to say:

	git bisect start
	git bisect bad $bad
	git bisect next

to start bisection without knowing a good commit.  This would
have you try a commit that is half-way since the beginning of
the history, which is rather wasteful if you already know a good
commit, but if you don't (or your history is short enough that
you do not care), there is no reason not to allow this.
Signed-off-by: NJunio C Hamano <junkio@cox.net>

Verify that git-bisect does not start before getting one bad and
one good commit.
Signed-off-by: NJunio C Hamano <junkio@cox.net>

Signed-off-by: NJunio C Hamano <junkio@cox.net>

Signed-off-by: NArjen Laarhoven <arjen@yaph.org>
Signed-off-by: NJunio C Hamano <junkio@cox.net>

This moves the knowledge about .git/config usage out of refs.c and into
builtin-branch.c instead, which allows git-branch to update HEAD to point
at the moved branch before attempting to update the config file. It also
allows git-branch to exit with an error code if updating the config file
should fail.
Signed-off-by: NLars Hjemli <hjemli@gmail.com>
Signed-off-by: NJunio C Hamano <junkio@cox.net>

If git_config_rename_section() fails, rename_ref() used to return 1, which
left HEAD pointing to an absent refs/heads file (since the actual renaming
had already occurred).
Signed-off-by: NLars Hjemli <hjemli@gmail.com>
Signed-off-by: NJunio C Hamano <junkio@cox.net>

The renaming without config test changed a branch from q to Q, which
fails on non-case sensitive file systems.  Change the test to use q
and q2.
Signed-off-by: NJunio C Hamano <junkio@cox.net>