[PATCH] ls-remote: print URL when no repo is specified

[Tay Ray Chuan <rctay89@gmail.com>]

After 9c00de5 (ls-remote: fall-back to default remotes when no remote
specified), when no repository is specified, ls-remote may use
the URL/remote in the config "branch.<name>.remote" or the remote
"origin"; it may not be immediately obvious to the user which was used.

In such cases, print a simple "From <URL>" line to indicate which
repository was used. This message is similar to git-fetch's, and is
printed to stderr to avoid breaking existing scripts that depend on
ls-remote's output behaviour.

It can also be disabled with -q/--quiet.

Modify tests related to falling back on default remotes to check for
this as well, and add a test to check for suppression of the message.

Signed-off-by: Tay Ray Chuan <rctay89@gmail.com>
---

  This is a logical follow-up to the "optional repo" form of ls-remote
  feature. Myself, I was using the "no-repo" form of ls-remote and
  sometimes wondered where it was listing remotes from.

  Johnathan, do you think the tests involved might have any cross-
  platform issues?

 builtin/ls-remote.c  |   10 +++++++++-
 t/t5512-ls-remote.sh |   19 +++++++++++++++----
 2 files changed, 24 insertions(+), 5 deletions(-)

diff --git a/builtin/ls-remote.c b/builtin/ls-remote.c
index 8ee91eb..34480cf 100644
--- a/builtin/ls-remote.c
+++ b/builtin/ls-remote.c
@@ -5,7 +5,7 @@

 static const char ls_remote_usage[] =
 "git ls-remote [--heads] [--tags]  [-u <exec> | --upload-pack <exec>]\n"
-"                     [<repository> [<refs>...]]";
+"                     [-q|--quiet] [<repository> [<refs>...]]";

 /*
  * Is there one among the list of patterns that match the tail part
@@ -34,6 +34,7 @@ int cmd_ls_remote(int argc, const char **argv, const char *prefix)
 	const char *dest = NULL;
 	int nongit;
 	unsigned flags = 0;
+	int quiet = 0;
 	const char *uploadpack = NULL;
 	const char **pattern = NULL;

@@ -67,6 +68,10 @@ int cmd_ls_remote(int argc, const char **argv, const char *prefix)
 				flags |= REF_NORMAL;
 				continue;
 			}
+			if (!strcmp("--quiet", arg) || !strcmp("-q", arg)) {
+				quiet = 1;
+				continue;
+			}
 			usage(ls_remote_usage);
 		}
 		dest = arg;
@@ -99,6 +104,9 @@ int cmd_ls_remote(int argc, const char **argv, const char *prefix)
 	ref = transport_get_remote_refs(transport);
 	if (transport_disconnect(transport))
 		return 1;
+
+	if (!dest && !quiet)
+		fprintf(stderr, "From %s\n", *remote->url);
 	for ( ; ref; ref = ref->next) {
 		if (!check_ref_type(ref, flags))
 			continue;
diff --git a/t/t5512-ls-remote.sh b/t/t5512-ls-remote.sh
index 3cf1b3d..8508df8 100755
--- a/t/t5512-ls-remote.sh
+++ b/t/t5512-ls-remote.sh
@@ -57,12 +57,21 @@ test_expect_success 'dies when no remote specified and no default remotes found'

 test_expect_success 'use "origin" when no remote specified' '

-	git remote add origin "$(pwd)/.git" &&
-	git ls-remote >actual &&
+	URL="$(pwd)/.git" &&
+	git remote add origin "$URL" &&
+	git ls-remote 2>actual_err >actual &&
+	grep "From $URL" actual_err &&
 	test_cmp expected.all actual

 '

+test_expect_success 'suppress "From <url>" with -q' '
+
+	git ls-remote -q 2>actual_err &&
+	test_must_fail grep "From $URL" actual_err
+
+'
+
 test_expect_success 'use branch.<name>.remote if possible' '

 	#
@@ -78,10 +87,12 @@ test_expect_success 'use branch.<name>.remote if possible' '
 		git show-ref	| sed -e "s/ /	/"
 	) >exp &&

-	git remote add other other.git &&
+	URL="other.git" &&
+	git remote add other $URL &&
 	git config branch.master.remote other &&

-	git ls-remote >actual &&
+	git ls-remote 2>actual_err >actual &&
+	grep "From $URL" actual_err &&
 	test_cmp exp actual

 '
--
1.7.1.189.g07419