[PATCH] git commit: Repaint the output format bikeshed (again)

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Since we want the most important information furthest
left while at the same time preserving valuable screen
estate, we move the branch-name to the leftmost side
of the commit result output. To make it read properly
we get rid of "Created", which I just can't fit into
a sentence without putting the branch-name last.

Having taken inspiration from the "git reset" command,
output for the three conceivable cases now look thus:

 normal commit
 <branch> is now at b930c4a (i386: Snib the sprock)

 detached commit
 DETACHED HEAD is now at b930c4a (i386: Snib the sprock)

 initial commit
 History has begun anew. Root-commit created.
 <branch> is now at bc930c4a (i386: Snib the sprock)

As a nice side-effect, we can get rid of the get_commit_format
helper function and thereby remove more code than we add.

This is a substantial rewrite of a patch originally sent by
Jeff King <peff@xxxxxxxx>.

Signed-off-by: Andreas Ericsson <ae@xxxxxx>
---

"Created" is a problem when one wants to put branch-name before the
subject line, because the subject has to follow the hash (it doesn't
describe the pre-state of the branch/detached head), but the newly
added commit. "Created, on branch, hash (subject)" just looks
stilted and stupid, so I had to change it. Hopefully this can be
accepted. If not, count me out.

I'm not sure if the last "else" case setting branch = head; can
ever happen, but I figured it can't hurt to make sure. Feel free
to modify commentary around it or the entire section when applying.

This is based on current next (798a2a426a).

builtin-commit.c |   47 ++++++++++++++++++-----------------------------
1 files changed, 18 insertions(+), 29 deletions(-)

diff --git a/builtin-commit.c b/builtin-commit.c
index e4e1448..3b43344 100644
--- a/builtin-commit.c
+++ b/builtin-commit.c
@@ -878,35 +878,12 @@ int cmd_status(int argc, const char **argv, const char *prefix)
	return commitable ? 0 : 1;
}

-static char *get_commit_format_string(void)
-{
-	unsigned char sha[20];
-	const char *head = resolve_ref("HEAD", sha, 0, NULL);
-	struct strbuf buf = STRBUF_INIT;
-
-	/* use shouty-caps if we're on detached HEAD */
-	strbuf_addf(&buf, "format:%s", strcmp("HEAD", head) ? "" : "DETACHED commit");
-	strbuf_addstr(&buf, "%h (%s)");
-
-	if (!prefixcmp(head, "refs/heads/")) {
-		const char *cp;
-		strbuf_addstr(&buf, " on ");
-		for (cp = head + 11; *cp; cp++) {
-			if (*cp == '%')
-				strbuf_addstr(&buf, "%x25");
-			else
-				strbuf_addch(&buf, *cp);
-		}
-	}
-
-	return strbuf_detach(&buf, NULL);
-}
-
static void print_summary(const char *prefix, const unsigned char *sha1)
{
	struct rev_info rev;
	struct commit *commit;
-	char *format = get_commit_format_string();
+	unsigned char head_sha1[20];
+	const char *branch, *head, *format = "format:%h (%s)";

	commit = lookup_commit(sha1);
	if (!commit)
@@ -931,15 +908,27 @@ static void print_summary(const char *prefix, const unsigned char *sha1)
	rev.diffopt.break_opt = 0;
	diff_setup_done(&rev.diffopt);

-	printf("Created %s", initial_commit ? "root-commit " : "");
+	/* a pretty rare occurrance, so let's celebrate it specially */
+	if (initial_commit)
+		printf("History has begun anew. Root-commit created.\n");
+
+	head = resolve_ref("HEAD", head_sha1, 0, NULL);
+	if (!strcmp(head, "HEAD"))
+		branch = "DETACHED HEAD";
+	else if (!prefixcmp(head, "refs/heads/"))
+		branch = &head[strlen("refs/heads/")];
+	else {
+		/* refs/git-svn, fe */
+		branch = head;
+	}
+
+	printf("%s is now at ", branch);

	if (!log_tree_commit(&rev, commit)) {
		struct strbuf buf = STRBUF_INIT;
		format_commit_message(commit, format + 7, &buf, DATE_NORMAL);
-		printf("%s\n", buf.buf);
-		strbuf_release(&buf);
+		printf("%s\n", strbuf_detach(&buf, NULL));
	}
-	free(format);
}

static int git_commit_config(const char *k, const char *v, void *cb)
--
1.6.0.2.529.g37dbc.dirty

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