fetch_pack(): update sought->nr to reflect number of unique entries

fetch_pack() removes duplicates from the "sought" list, thereby
shrinking the list.  But previously, the caller was not informed about
the shrinkage.  This would cause a spurious error message to be
emitted by cmd_fetch_pack() if "git fetch-pack" is called with
duplicate refnames.

Instead, remove duplicates using string_list_remove_duplicates(),
which adjusts sought->nr to reflect the new length of the list.

The last test of t5500 inexplicably *required* "git fetch-pack" to
fail when fetching a list of references that contains duplicates;
i.e., it insisted on the buggy behavior.  So change the test to expect
the correct behavior.

Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/builtin/fetch-pack.c b/builtin/fetch-pack.c
index 63d455f..6cd734a 100644 (file)
--- a/builtin/fetch-pack.c
+++ b/builtin/fetch-pack.c
@@ -858,19 +858,6 @@ static struct ref *do_fetch_pack(int fd[2],
        return ref;
 }
 
-static int remove_duplicates(struct string_list *sought)
-{
-       int src, dst;
-
-       if (!sought->nr)
-               return 0;
-
-       for (src = dst = 1; src < sought->nr; src++)
-               if (strcmp(sought->items[src].string, sought->items[dst-1].string))
-                       sought->items[dst++] = sought->items[src];
-       return dst;
-}
-
 static int fetch_pack_config(const char *var, const char *value, void *cb)
 {
        if (strcmp(var, "fetch.unpacklimit") == 0) {
@@ -1090,7 +1077,7 @@ struct ref *fetch_pack(struct fetch_pack_args *my_args,
 
        if (sought->nr) {
                sort_string_list(sought);
-               remove_duplicates(sought);
+               string_list_remove_duplicates(sought, 0);
        }
 
        if (!ref) {

diff --git a/t/t5500-fetch-pack.sh b/t/t5500-fetch-pack.sh
index 15d277f..acd41e8 100755 (executable)
--- a/t/t5500-fetch-pack.sh
+++ b/t/t5500-fetch-pack.sh
@@ -391,7 +391,7 @@ test_expect_success 'fetch mixed refs from cmdline and stdin' '
 test_expect_success 'test duplicate refs from stdin' '
        (
        cd client &&
-       test_must_fail git fetch-pack --stdin --no-progress .. <../input.dup
+       git fetch-pack --stdin --no-progress .. <../input.dup
        ) >output &&
        cut -d " " -f 2 <output | sort >actual &&
        test_cmp expect actual