completion: list short refs from a remote given as a URL

e832f5c09680 (completion: avoid ls-remote in certain scenarios,
2013-05-28) turned a 'git ls-remote <remote>' query into a 'git
for-each-ref refs/remotes/<remote>/' to improve responsiveness of
remote refs completion by avoiding potential network communication.
However, it inadvertently made impossible to complete short refs from
a remote given as a URL, e.g. 'git fetch git://server.com/repo.git
<TAB>', because there is, of course, no such thing as
'refs/remotes/git://server.com/repo.git'.

Since the previous commit we tell apart configured remotes, i.e. those
that can have a hierarchy under 'refs/remotes/', from others that
don't, including remotes given as URL, so we know when we can't use
the faster 'git for-each-ref'-based approach.

Resurrect the old, pre-e832f5c09680 'git ls-remote'-based code for the
latter case to support listing short refs from remotes given as a URL.
The code is slightly updated from the original to

  - take into account the path to the repository given on the command
    line (if any), and
  - omit 'ORIG_HEAD' from the query, as 'git ls-remote' will never
    list it anyway.

When the remote given to __git_refs() doesn't exist, then it will be
handled by this resurrected 'git ls-remote' query.  This code path
doesn't list 'HEAD' unconditionally, which has the nice side effect of
fixing two more expected test failures.

Signed-off-by: SZEDER Gábor <szeder.dev@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 3 insertions, 3 deletions

diff --git a/t/t9902-completion.sh b/t/t9902-completion.sh
index 5b4defa..500505d 100755
--- a/t/t9902-completion.sh
+++ b/t/t9902-completion.sh
@@ -540,7 +540,7 @@ test_expect_success '__git_refs - configured remote - remote name matches a dire
 	test_cmp expected "$actual"
 '
 
-test_expect_failure '__git_refs - URL remote' '
+test_expect_success '__git_refs - URL remote' '
 	cat >expected <<-EOF &&
 	HEAD
 	branch-in-other
@@ -567,7 +567,7 @@ test_expect_success '__git_refs - URL remote - full refs' '
 	test_cmp expected "$actual"
 '
 
-test_expect_failure '__git_refs - non-existing remote' '
+test_expect_success '__git_refs - non-existing remote' '
 	(
 		cur= &&
 		__git_refs non-existing >"$actual"
@@ -583,7 +583,7 @@ test_expect_success '__git_refs - non-existing remote - full refs' '
 	test_must_be_empty "$actual"
 '
 
-test_expect_failure '__git_refs - non-existing URL remote' '
+test_expect_success '__git_refs - non-existing URL remote' '
 	(
 		cur= &&
 		__git_refs "file://$ROOT/non-existing" >"$actual"