Log message printout cleanups

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: Linus Torvalds <torvalds@osdl.org>
Signed-off-by: Junio C Hamano <junkio@cox.net>

1 files changed, 2 insertions, 2 deletions

diff --git a/t/t1200-tutorial.sh b/t/t1200-tutorial.sh
index 10024133e3..16b3ea9157 100755
--- a/t/t1200-tutorial.sh
+++ b/t/t1200-tutorial.sh
@@ -49,7 +49,7 @@ test_expect_success 'git diff HEAD' 'cmp diff.expect diff.output'
 #test_expect_success 'git-read-tree --reset HEAD' "git-read-tree --reset HEAD ; test \"hello: needs update\" = \"$(git-update-index --refresh)\""
 
 cat > whatchanged.expect << EOF
-diff-tree VARIABLE (from root)
+commit VARIABLE
 Author: VARIABLE
 Date:   VARIABLE
 
@@ -72,7 +72,7 @@ index 0000000..557db03
 EOF
 
 git-whatchanged -p --root | \
-	sed -e "1s/^\(.\{10\}\).\{40\}/\1VARIABLE/" \
+	sed -e "1s/^\(.\{7\}\).\{40\}/\1VARIABLE/" \
 		-e "2,3s/^\(.\{8\}\).*$/\1VARIABLE/" \
 > whatchanged.output
 test_expect_success 'git-whatchanged -p --root' 'cmp whatchanged.expect whatchanged.output'