It uses the jit syntax, at least for now. 0-xxxx is the first parent of xxxx,
while 1-xxxx is the second, and so on. You can use just "-xxxx" for the first
parent, but a lot of commands will think that the initial '-' implies a
command line flag.

This allows the programs to use various simplified versions of
the SHA1 names, eg just say "HEAD" for the SHA1 pointed to by
the .git/HEAD file etc.

For example, this commit has been done with

	git-commit-tree $(git-write-tree) -p HEAD

instead of the traditional "$(cat .git/HEAD)" syntax.

And be a bitmore careful about matching: if we don't recognize a word
or a number, we skip the whole thing, rather than trying the next character
in that word/number.

Finally: since ctime() adds the final '\n', don't add another one in test-date.

(and some added checks for truly non-sensical stuff)

I found this during a conflict merge testing.  The original did
not have either DF (a file) or DF/DF (a file DF/DF under a
directory DF).  One side created DF, the other created DF/DF.  I
first resolved DF as a new file by taking what the first side
did.  After that, the entry DF/DF cannot be resolved by running
git-update-cache --remove although it does not exist on the
filesystem.

    $ /bin/ls -F
    AN  DF  MN  NM  NN  SS  Z/
    $ git-ls-files --stage | grep DF
    100644 71420ab81e254145d26d6fc0cddee64c1acd4787 0 DF
    100644 68a6d8b91da11045cf4aa3a5ab9f2a781c701249 2 DF/DF
    $ git-update-cache --remove DF/DF
    fatal: Unable to add DF/DF to database

It turns out that the errno from open() in this case was not
ENOENT but ENOTDIR, which the code did not check.  Here is a
fix.
Signed-off-by: NJunio C Hamano <junkio@cox.net>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

The merge-cache program was updated to pass executable bits when
calling git-merge-one-file-script, but the called script
supplied as an example were not using them carefully.

This patch fixes the following problems in the script:

 * When a new file is created in a directory, which is a file in
   the work tree, it tried to create leading directory but did
   not check for failure from the "mkdir -p" command.

 * The script did not check the exit status from the
   git-update-cache command at all.

 * The parameter "$4" to the script is a file name that can
   contain almost any characters, so it must be quoted with
   double quotes and also needs to be preceded with -- to mark
   it as a non-option when passed to certain commands.

 * The chmod command was used with parameter "$6" or "$7" to set
   the mode bits.  This contradicts with the strategy taken by
   checkout-cache, where we honor user's umask and force only
   the executable bits.  With this patch, it creates a new file
   by redirecting into it (thus honoring user's default umask),
   and then uses "chmod +x" if we want the resulting file
   executable.  Without this fix, the merge result becomes 0644
   or 0755 for users whose umask is 002 for whom it should
   become 0664 or 0775.

 * When "$1 -> $2 -> $3" case was not handled, the script did
   not say which path it was working on, which was not so useful
   when used with the -a option of git-merge-cache.
Signed-off-by: NJunio C Hamano <junkio@cox.net>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

I said:

     - Stop attempting to be compatible with cg-patch, and drop
       (mode:XXXXXX) bits from the diff.

     - Do keep the /dev/null change for created and deleted case.

     - No "Index:" line, no "Mode change:" line, anywhere in the
       output.  Anything that wants the mode bits and sha1 hash can
       do things from GIT_EXTERNAL_DIFF mechanism.  Maybe document
       suggested usage better.

This adds an example script git-apply-patch-script, that can be
used as the GIT_EXTERNAL_DIFF to apply changes between two trees
directly on the current work tree, like this:

 GIT_EXTERNAL_DIFF=git-apply-patch-script git-diff-tree -p <tree> <tree>
Signed-off-by: NJunio C Hamano <junkio@cox.net>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Linus says,

    The fewer lines there are that don't usually tell a human
    anything, the better. Dense is good.

This patch makes the default diff output more dense.  This
removes the previous misguided attempt to be cg-patch
compatible.
Signed-off-by: NJunio C Hamano <junkio@cox.net>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Diff-tree-helper take two patch inadvertently dropped the
support of -R option, which is necessary to produce reverse diff
based on diff-cache and diff-files output (diff-tree does not
matter since you can feed two trees in reverse order).  This
patch restores it.
Signed-off-by: NJunio C Hamano <junkio@cox.net>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

The method for deciding what to pull is useful separately from any of the
ways of actually fetching the objects.

So split out "pull" functionality from http-pull and rpull
Signed-off-by: NDaniel Barkalow <barkalow@iabervon.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

We used to have all these time-related issues, long gone now.

We'd get the sign wrong for the minutes part of a negative offset.

Also, add EEST (hey, it's Finland).

This still doesn't actually really _use_ it properly, nor make any
distinction between different DST rules, but at least we could (if
we wanted to) fake it a bit better.

Right now the code actually still says "it's always summer". I'm
from Finland, I don't like winter.

We looked at the year one character too early, and we
didn't accept a two-character year date after 2000.

Signed-off-by: NNicolas Pitre <nico@cam.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

This date parser turns line-noise into a date. Cool.

Show the types of objects involved in broken links, and don't bother
warning about unreachable tag files (if somebody cares about tags,
they'll use the --tags flag to see them).

As suggested by Nicolas Pitre

we play with the d_type compatibility macros.

There's no AF_LOCAL in POSIX

Not everybody has "d_type".

Older zlib's don't have deflateBound()

...since everything out there is either strange (libc mktime has issues
with timezones) or introduces unnecessary dependencies for people (libcurl).

This goes back to the old date parsing, but moves it out into a file of
its own, and does the "struct tm" to "seconds since epoch" handling by
hand. 

I grepped through the tz-database and it seems there's one "country"
left that has non-60-minute DST: Lord Howe Island.  All others dropped
that before 1970. 

This switches git-commit-tree to using curl_getdate() for the
AUTHOR_DATE, and thus fixes the problem with "mktime()" parsing dates in
the local timezone.  It also ends up being more permissive about the
format of the date. 
Signed-off-by: NTony Luck <tony.luck@intel.com>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Gracefully handle non-commit IDs instead of segfaulting.
Signed-off-by: NJonas Fonseca <fonseca@diku.dk>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Write commit ID to global extended pax header at the beginning of the tar
file, if possible.  get-tar-commit-id.c is an example program to get the
ID back out of such a tar archive.
Signed-off-by: NRene Scharfe <rene.scharfe@lsrfire.ath.cx>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Linus said:

    "Let's see what else I forgot.."

Not that many, but here they are.
Signed-off-by: NJunio C Hamano <junkio@cox.net>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Here is another.  This one belongs to a clean-up category.
Signed-off-by: NJunio C Hamano <junkio@cox.net>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

Let's see what else I forgot..

This fixes the git-export which calls diff-tree.
Signed-off-by: NJunio C Hamano <junkio@cox.net>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

This also regularizes the make. The source files themselves don't get
the "git-" prefix, because that's just inconvenient. So instead we just
make the rule that "git-xxxx" depends on "xxxx.c", and do that for
all the core programs (ie the old "git-mktag.c" got renamed to just
"mktag.c" to match everything else).

And "show-diff" got renamed to "git-diff-files" while at it, since
that's what it really should be to match the other git-diff-xxx cases.

If you set SHA1_FILE_DIRECTORY to something else than .git/objects
git-pull-script will store the fetched files in a location the rest of
the tools does not expect.

git-prune-script also ignores this setting, but I think this is good,
because pruning a shared tree to fit a single project means throwing
away a lot of useful data. :-)
Signed-off-by: NRene Scharfe <rene.scharfe@lsrfire.ath.cx>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

This patch replaces the usage of read_tree_with_tree_or_commit_sha1()
with read_object_with_reference() in tar-tree.  As a result the code
that tries to figure out the commit time doesn't need to open the commit
object 'by hand' any more.

Signed-off-by: Rene Scharfe <lsrfire.ath.cx>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

This patch renames read_tree_with_tree_or_commit_sha1() to
read_object_with_reference() and extends it to automatically
dereference not just "commit" objects but "tag" objects.  With
this patch, you can say e.g.:

    ls-tree $tag
    read-tree -m $(merge-base $tag $HEAD) $tag $HEAD
    diff-cache $tag
    diff-tree $tag $HEAD
Signed-off-by: NJunio C Hamano <junkio@cox.net>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

The show-files long options are cumbersome to type.  This patch adds
equivalent short options.

Also add missing "unmerged" to usage string.

Finally reduce the number of lines for argument parsing in half.
Signed-off-by: NNicolas Pitre <nico@cam.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

No need to pass -r anymore, since diff-tree -p implies recursive
behaviour these days.
Signed-off-by: NJunio C Hamano <junkio@cox.net>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

This is an improved version of tar-tree, a streaming archive creator for
GIT.  The major added feature is blocking; all write(2) calls now have a
size of 10240, just as GNU tar (and tape drives) likes them.  The
buffering overhead does not seem to degrade performance because most
files in the repositories I tested this with are smaller than 10KB, so
we need fewer system calls. 

File names are still restricted to 500 bytes and the archive format
currently only allows for files up to 8GB.  Both restrictions can be
lifted if need be with more pax extended headers. 

The archive format used is the pax interchange format, i.e.  POSIX tar
format.  It can be read by (and created with) GNU tar.  If I read the
specs correctly tar-tree should now be standards compliant (modulo
bugs). 

Because it streams the archive (think ls-tree merged with cat-file),
tar-tree doesn't need to create any temporary files.  That makes it
quite fast. 

It accepts tree IDs and commit IDs as first parameter.  In the latter
case tar-tree tries to get the commit date out of the committer line. 
Else all files in the archive are time-stamped with the current time. 

An optional second parameter is used as a path prefix for all files in
the archive.  Example:

   $ tar-tree a2755a80f40e5794ddc20e00f781af9d6320fafb \
   linux-2.6.12-rc3 | bzip9 -9 > linux-2.6.12-rc3.tar.bz2
Signed-off-by: NRene Scharfe <rene.scharfe@lsrfire.ath.cx>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

This can be used with the famous dontdiff file as follows to find out
about uncommitted files just like dontdiff is used with the diff
command:

    show-files --others --exclude-from=dontdiff

and the exclude list can be reversed with the --ignore switch.
Signed-off-by: NNicolas Pitre <nico@cam.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>