Currently "git fetch REMOTE SHA1" silently exits 1 if the server doesn't
allow requests for unadvertised objects by sha1.  Change it to print a
meaningful error message.

Signed-off-by: Matt McCutchen <m...@mattmccutchen.net>
---

The fetch code looks unbelievably complicated to me and I don't understand all
the cases that can arise.  Hopefully this patch is an acceptable solution to the
problem.

 fetch-pack.c          | 31 ++++++++++++++++---------------
 t/t5516-fetch-push.sh |  3 ++-
 2 files changed, 18 insertions(+), 16 deletions(-)

diff --git a/fetch-pack.c b/fetch-pack.c
index 601f077..117874c 100644
--- a/fetch-pack.c
+++ b/fetch-pack.c
@@ -598,23 +598,24 @@ static void filter_refs(struct fetch_pack_args *args,
        }
 
        /* Append unmatched requests to the list */
-       if ((allow_unadvertised_object_request &
-           (ALLOW_TIP_SHA1 | ALLOW_REACHABLE_SHA1))) {
-               for (i = 0; i < nr_sought; i++) {
-                       unsigned char sha1[20];
+       for (i = 0; i < nr_sought; i++) {
+               unsigned char sha1[20];
 
-                       ref = sought[i];
-                       if (ref->matched)
-                               continue;
-                       if (get_sha1_hex(ref->name, sha1) ||
-                           ref->name[40] != '\0' ||
-                           hashcmp(sha1, ref->old_oid.hash))
-                               continue;
+               ref = sought[i];
+               if (ref->matched)
+                       continue;
+               if (get_sha1_hex(ref->name, sha1) ||
+                   ref->name[40] != '\0' ||
+                   hashcmp(sha1, ref->old_oid.hash))
+                       continue;
 
-                       ref->matched = 1;
-                       *newtail = copy_ref(ref);
-                       newtail = &(*newtail)->next;
-               }
+               if (!(allow_unadvertised_object_request &
+                   (ALLOW_TIP_SHA1 | ALLOW_REACHABLE_SHA1)))
+                       die(_("Server does not allow request for unadvertised 
object %s"), ref->name);
+
+               ref->matched = 1;
+               *newtail = copy_ref(ref);
+               newtail = &(*newtail)->next;
        }
        *refs = newlist;
 }
diff --git a/t/t5516-fetch-push.sh b/t/t5516-fetch-push.sh
index 0fc5a7c..177897e 100755
--- a/t/t5516-fetch-push.sh
+++ b/t/t5516-fetch-push.sh
@@ -1098,7 +1098,8 @@ test_expect_success 'fetch exact SHA1' '
                test_must_fail git cat-file -t $the_commit &&
 
                # fetching the hidden object should fail by default
-               test_must_fail git fetch -v ../testrepo 
$the_commit:refs/heads/copy &&
+               test_must_fail git fetch -v ../testrepo 
$the_commit:refs/heads/copy 2>err &&
+               test_i18ngrep "Server does not allow request for unadvertised 
object" err &&
                test_must_fail git rev-parse --verify refs/heads/copy &&
 
                # the server side can allow it to succeed
-- 
2.9.3


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