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, 5 insertions, 4 deletions

diff --git a/rev-list.c b/rev-list.c
index d3c0dd90e..a4d72af6e 100644
--- a/rev-list.c
+++ b/rev-list.c
@@ -41,13 +41,14 @@ struct rev_info revs;
 static int bisect_list = 0;
 static int show_timestamp = 0;
 static int hdr_termination = 0;
+static const char *header_prefix;
 
 static void show_commit(struct commit *commit)
 {
 	if (show_timestamp)
 		printf("%lu ", commit->date);
-	if (*revs.header_prefix)
-		fputs(revs.header_prefix, stdout);
+	if (header_prefix)
+		fputs(header_prefix, stdout);
 	if (commit->object.flags & BOUNDARY)
 		putchar('-');
 	if (revs.abbrev_commit && revs.abbrev)
@@ -322,9 +323,9 @@ int main(int argc, const char **argv)
 		/* The command line has a --pretty  */
 		hdr_termination = '\n';
 		if (revs.commit_format == CMIT_FMT_ONELINE)
-			revs.header_prefix = "";
+			header_prefix = "";
 		else
-			revs.header_prefix = "commit ";
+			header_prefix = "commit ";
 	}
 	else if (revs.verbose_header)
 		/* Only --header was specified */