On Sun, 16 Apr 2006, Junio C Hamano wrote:
>
> In the mid-term, I am hoping we can drop the generate_header()
> callchain _and_ the custom code that formats commit log in-core,
> found in cmd_log_wc().

Ok, this was nastier than expected, just because the dependencies between
the different log-printing stuff were absolutely _everywhere_, but here's
a patch that does exactly that.

The patch is not very easy to read, and the "--patch-with-stat" thing is
still broken (it does not call the "show_log()" thing properly for
merges). That's not a new bug. In the new world order it _should_ do
something like

	if (rev->logopt)
		show_log(rev, rev->logopt, "---\n");

but it doesn't. I haven't looked at the --with-stat logic, so I left it
alone.

That said, this patch removes more lines than it adds, and in particular,
the "cmd_log_wc()" loop is now a very clean:

	while ((commit = get_revision(rev)) != NULL) {
		log_tree_commit(rev, commit);
		free(commit->buffer);
		commit->buffer = NULL;
	}

so it doesn't get much prettier than this. All the complexity is entirely
hidden in log-tree.c, and any code that needs to flush the log literally
just needs to do the "if (rev->logopt) show_log(...)" incantation.

I had to make the combined_diff() logic take a "struct rev_info" instead
of just a "struct diff_options", but that part is pretty clean.

This does change "git whatchanged" from using "diff-tree" as the commit
descriptor to "commit", and I changed one of the tests to reflect that new
reality. Otherwise everything still passes, and my other tests look fine
too.
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
Signed-off-by: NJunio C Hamano <junkio@cox.net>

Initial fix prepared by Johannes, but I did it slightly differently.
Signed-off-by: NJunio C Hamano <junkio@cox.net>

Make sure "git show" always show the header, regardless of whether there
is a diff or not.

Also, make sure "always_show_header" actually works, since generate_header
only tested it in one out of three return paths.
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
Signed-off-by: NJunio C Hamano <junkio@cox.net>

This moves the decision to print the log message, while diff
options are in effect, to log-tree.  It gives behaviour closer
to the traditional one.
Signed-off-by: NJunio C Hamano <junkio@cox.net>

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

* master:
  pager: do not fork a pager if PAGER is set to empty.
  diff-options: add --patch-with-stat
  diff-files --stat: do not dump core with unmerged index.
  Support "git cmd --help" syntax
  diff --stat: do not do its own three-dashes.
  diff-tree: typefix.
  GIT v1.3.0-rc4
  xdiff: post-process hunks to make them consistent.

This skips an extra pipe, and helps debugging tremendously.

[jc: PAGER=cat is a questionable hack and should be done as a separate
patch. ]
Signed-off-by: NJohannes Schindelin <Johannes.Schindelin@gmx.de>
Signed-off-by: NJunio C Hamano <junkio@cox.net>

This uses the "--no-walk" flag that I never actually implemented (but I'm
sure I mentioned it) to make "git show" be essentially the same thing as
"git whatchanged --no-walk".

It just refuses to add more interesting parents to the revision walking
history, so you don't actually get any history, you just get the commit
you asked for.

I was going to add "--no-walk" as a real argument flag to git-rev-list
too, but I'm not sure anybody actually needs it. Although it might be
useful for porcelain, so I left the door open.

[jc: ported to the unified option structure by Linus]
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
Signed-off-by: NJunio C Hamano <junkio@cox.net>

Split internal "git log" into reusable piece and add "git
whatchanged".  This is based on the option parsing unification
work Linus did.
Signed-off-by: NJunio C Hamano <junkio@cox.net>

The big option parser unification broke rev-list the big way;
this makes it use options from the parsed revs structure.
Signed-off-by: NJunio C Hamano <junkio@cox.net>

Merging all three option parsers related to whatchanged is
unarguably the right thing, but the fallout was too big to scare
me away.  Let's try it once again, but once step at time.

This splits out init_revisions() call from setup_revisions(), so
that the callers can set different defaults to match the
traditional benaviour.

The rev-list command is still broken in a big way, which is the
topic of next step.
Signed-off-by: NJunio C Hamano <junkio@cox.net>

With this option, git prepends a diffstat in front of the patch.

Since I really, really do not know what a diffstat of a combined diff
("merge diff") should look like, the diffstat is not generated for these.
Signed-off-by: NJohannes Schindelin <Johannes.Schindelin@gmx.de>
Signed-off-by: NJunio C Hamano <junkio@cox.net>

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

The "--help" argument is special, in that it is (along with "--version")
in that is taken by the "git" program itself rather than the sub-command,
and thus we've had the syntax "git --help cmd".

However, as anybody who has ever used CVS or some similar devil-spawn
program, it's confusing as h*ll when options before the sub-command act
differently from options after the sub-command, so this quick hack just
makes it acceptable to do "git cmd --help" instead, and get the exact same
result.

It may be hacky, but it's simple and does the trick.

Of course, this does not help if you use one of the non-builtin commands
without using the "git" helper. Ie you won't be getting a man-page just
because you do "git-rev-list --help". Don't expect us to be quite _that_
helpful.
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
Signed-off-by: NJunio C Hamano <junkio@cox.net>

I missed that "git-diff-* --stat" spits out three-dash separator
on its own without being asked.  Remove it.

When we output commit log followed by diff, perhaps --patch-with-stat,
for downstream consumer, we _would_ want the three-dash between
the message and the diff material, but that logic belongs to the
caller, not diff generator.
Signed-off-by: NJunio C Hamano <junkio@cox.net>

Recent diff_tree_setup_paths() update made it take a second
argument of type "struct diff_options", but we passed another
struct that happenes to have that type at the beginning by
mistake.
Signed-off-by: NJunio C Hamano <junkio@cox.net>

I've merged everything I think is ready for 1.3.0, so this is
the final round -- hopefully I can release this with minimum
last-minute fixup as v1.3.0 early next week.
Signed-off-by: NJunio C Hamano <junkio@cox.net>

* dl/xdiff:
  xdiff: post-process hunks to make them consistent.

rev-list does not take diff options, so barf after seeing some.
Signed-off-by: NJunio C Hamano <junkio@cox.net>

The default abbreviation precision should be DEFAULT_ABBREV as before.
Signed-off-by: NJunio C Hamano <junkio@cox.net>

This basically does a few things that are sadly somewhat interdependent,
and nontrivial to split out

 - get rid of "struct log_tree_opt"

   The fields in "log_tree_opt" are moved into "struct rev_info", and all
   users of log_tree_opt are changed to use the rev_info struct instead.

 - add the parsing for the log_tree_opt arguments to "setup_revision()"

 - make setup_revision set a flag (revs->diff) if the diff-related
   arguments were used. This allows "git log" to decide whether it wants
   to show diffs or not.

 - make setup_revision() also initialize the diffopt part of rev_info
   (which we had from before, but we just didn't initialize it)

 - make setup_revision() do all the "finishing touches" on it all (it will
   do the proper flag combination logic, and call "diff_setup_done()")

Now, that was the easy and straightforward part.

The slightly more involved part is that some of the programs that want to
use the new-and-improved rev_info parsing don't actually want _commits_,
they may want tree'ish arguments instead. That meant that I had to change
setup_revision() to parse the arguments not into the "revs->commits" list,
but into the "revs->pending_objects" list.

Then, when we do "prepare_revision_walk()", we walk that list, and create
the sorted commit list from there.

This actually cleaned some stuff up, but it's the less obvious part of the
patch, and re-organized the "revision.c" logic somewhat. It actually paves
the way for splitting argument parsing _entirely_ out of "revision.c",
since now the argument parsing really is totally independent of the commit
walking: that didn't use to be true, since there was lots of overlap with
get_commit_reference() handling etc, now the _only_ overlap is the shared
(and trivial) "add_pending_object()" thing.

However, I didn't do that file split, just because I wanted the diff
itself to be smaller, and show the actual changes more clearly. If this
gets accepted, I'll do further cleanups then - that includes the file
split, but also using the new infrastructure to do a nicer "git diff" etc.

Even in this form, it actually ends up removing more lines than it adds.

It's nice to note how simple and straightforward this makes the built-in
"git log" command, even though it continues to support all the diff flags
too. It doesn't get much simpler that this.

I think this is worth merging soonish, because it does allow for future
cleanup and even more sharing of code. However, it obviously touches
"revision.c", which is subtle. I've tested that it passes all the tests we
have, and it passes my "looks sane" detector, but somebody else should
also give it a good look-over.

[jc: squashed the original and three "oops this too" updates, with
 another fix-up.]
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
Signed-off-by: NJunio C Hamano <junkio@cox.net>

* js/diffstat:
  diff --stat: no need to ask funcnames nor context.
  diff-options: add --stat (take 2)
  diff-options: add --stat (take 2)

* jc/fix5500:
  t5500: test fix

Partly because we've messed up and now have some commits with trailing
whitespace, but partly because this also just simplifies the code, let's
remove trailing whitespace from the end when pretty-printing commits.
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
Signed-off-by: NJunio C Hamano <junkio@cox.net>

Wrappers that use sh-setup took --help but not -h.  Noticed by
Sébastien Pierre.
Signed-off-by: NJunio C Hamano <junkio@cox.net>

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

Noticed by Johannes.  We do not install it anymore, but still have
been shipping the source, which was crazy.
Signed-off-by: NJunio C Hamano <junkio@cox.net>

This fixes f4ee3eb6 breakage, which
added an extra trailing blank line after stripping trailing blank lines
by mistake.
Signed-off-by: NJunio C Hamano <junkio@cox.net>

Relying on eye-candy progress bar was fragile to begin with.
Run fetch-pack with -k option, and count the objects that are in
the pack that were transferred from the other end.
Signed-off-by: NJunio C Hamano <junkio@cox.net>

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

The regexp on the right hand side of expr : operator somehow was
broken.

	expr 'z+pu:refs/tags/ko-pu' : 'z\+\(.*\)'

does not strip '+'; write 'z+\(.*\)' instead.

We probably should switch to shell based substring post 1.3.0;
that's not bashism but just POSIX anyway.
Signed-off-by: NJunio C Hamano <junkio@cox.net>

... and a fix for an invalid free():
Signed-off-by: NJunio C Hamano <junkio@cox.net>

Now, you can say "git diff --stat" (to get an idea how many changes are
uncommitted), or "git log --stat".
Signed-off-by: NJohannes Schindelin <Johannes.Schindelin@gmx.de>
Signed-off-by: NJunio C Hamano <junkio@cox.net>

Some words, e.g., `match', are special to expr(1), and cause strange
parsing effects.  Track down all uses of expr and mangle the arguments
so that this isn't a problem.
Signed-off-by: NMark Wooding <mdw@distorted.org.uk>
Signed-off-by: NJunio C Hamano <junkio@cox.net>

When running t3600-rm test under fakeroot (or as root), we
cannot make a file unremovable with "chmod a-w .".  Detect this
case early and skip that test.
Signed-off-by: NJunio C Hamano <junkio@cox.net>

This trivially avoids keeping the commit message data around after we
don't need it any more, avoiding a continually growing "git log" memory
footprint.

It's not a huge deal, but it's somewhat noticeable. For the current kernel
tree, doing a full "git log" I got

 - before: /usr/bin/time git log > /dev/null
	0.81user 0.02system 0:00.84elapsed 100%CPU (0avgtext+0avgdata 0maxresident)k
	0inputs+0outputs (0major+8851minor)pagefaults 0swaps

 - after: /usr/bin/time git log > /dev/null
	0.79user 0.03system 0:00.83elapsed 100%CPU (0avgtext+0avgdata 0maxresident)k
	0inputs+0outputs (0major+5039minor)pagefaults 0swaps

ie the touched pages dropped from 8851 to 5039. For the historic kernel
archive, the numbers are 18357->11037 minor page faults.

We could/should in theory free the commits themselves, but that's really a
lot harder, since during revision traversal we may hit the same commit
twice through different children having it as a parent, even after we've
shown it once (when that happens, we'll silently ignore it next time, but
we still need the "struct commit" to know).

And as the commit message data is clearly the biggest part of the commit,
this is the really easy 60% solution.
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
Signed-off-by: NJunio C Hamano <junkio@cox.net>

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

This target lists undocumented commands, and/or whose document
is not referenced from the main git documentation.

For now, there are some exceptions I added primarily because I
lack the energy to document them myself:

 - merge backends (we should really document them)
 - ssh-push/ssh-pull (does anybody still use them?)
 - annotate and blame (maybe after one of them eats the other ;-)
Signed-off-by: NJunio C Hamano <junkio@cox.net>

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