Re: [PATCH] merge: indicate remote tracking branches in merge message

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Jeff King <peff@xxxxxxxx> writes:

> Previously when merging directly from a local tracking
> branch like:
>
>   git merge origin/master
>
> The merge message said:
>
>    Merge commit 'origin/master'
>
>      * commit 'origin/master':
>        ...
>
> Instead, let's be more explicit about what we are merging:
>
>    Merge remote branch 'origin/master'
>
>      * origin/master:
>        ...
>
> We accomplish this by recognizing remote tracking branches
> in git-merge when we build the simulated FETCH_HEAD output
> that we feed to fmt-merge-msg.
>
> Signed-off-by: Jeff King <peff@xxxxxxxx>
> ---
> This is a repost of
>
>   http://article.gmane.org/gmane.comp.version-control.git/119909
>
> which got no response from you. I think it is a good idea, but I am not
> deeply committed to it. I mainly want a yes or no so I can clean it out
> of my patch queue.

I somewhat suspect that the patch was not applied because it also lacked
necessary adjustments to tests.  With this patch, I think the tests would
fail.

Nevertheless, I think it is a good thing to do.  But I am unsure about the
implementation.

Shouldn't it instead feed what it got from the end user to the dwim
machinery, and make sure it dwims into refs/remotes/ hierarchy?

In other words, like this.  Note that it would be much clearer to see
what's needed, if you want to extend it to refs/tags hierarchy ;-)

 builtin-merge.c |   20 ++++++++++++--------
 1 files changed, 12 insertions(+), 8 deletions(-)

diff --git a/builtin-merge.c b/builtin-merge.c
index 82b5466..f4de73f 100644
--- a/builtin-merge.c
+++ b/builtin-merge.c
@@ -358,6 +358,7 @@ static void merge_name(const char *remote, struct strbuf *msg)
 	struct strbuf buf = STRBUF_INIT;
 	struct strbuf bname = STRBUF_INIT;
 	const char *ptr;
+	char *found_ref;
 	int len, early;
 
 	strbuf_branchname(&bname, remote);
@@ -368,14 +369,17 @@ static void merge_name(const char *remote, struct strbuf *msg)
 	if (!remote_head)
 		die("'%s' does not point to a commit", remote);
 
-	strbuf_addstr(&buf, "refs/heads/");
-	strbuf_addstr(&buf, remote);
-	resolve_ref(buf.buf, branch_head, 0, NULL);
-
-	if (!hashcmp(remote_head->sha1, branch_head)) {
-		strbuf_addf(msg, "%s\t\tbranch '%s' of .\n",
-			sha1_to_hex(branch_head), remote);
-		goto cleanup;
+	if (dwim_ref(remote, strlen(remote), branch_head, &found_ref) > 0) {
+		if (!prefixcmp(found_ref, "refs/heads/")) {
+			strbuf_addf(msg, "%s\t\tbranch '%s' of .\n",
+				    sha1_to_hex(branch_head), remote);
+			goto cleanup;
+		}
+		if (!prefixcmp(found_ref, "refs/remotes/")) {
+			strbuf_addf(msg, "%s\t\tremote branch '%s' of .\n",
+				    sha1_to_hex(branch_head), remote);
+			goto cleanup;
+		}
 	}
 
 	/* See if remote matches <name>^^^.. or <name>~<number> */
--
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