Fix "git diff blob1 blob2" showing the diff in reverse.

diff --git a/send-pack.c b/send-pack.c
index ad22da56e9d43b6dc36a1f9542d07e4b3da459ef..10bc8bc35935c6ba3af70456781d6194c55ba274 100644 (file)
--- a/send-pack.c
+++ b/send-pack.c
@@ -27,7 +27,7 @@ static int is_zero_sha1(const unsigned char *sha1)
 
 static void exec_pack_objects(void)
 {
-       static char *args[] = {
+       static const char *args[] = {
                "pack-objects",
                "--stdout",
                NULL
@@ -38,29 +38,47 @@ static void exec_pack_objects(void)
 
 static void exec_rev_list(struct ref *refs)
 {
-       static char *args[1000];
-       int i = 0;
+       struct ref *ref;
+       static const char *args[1000];
+       int i = 0, j;
 
        args[i++] = "rev-list"; /* 0 */
        if (use_thin_pack)      /* 1 */
                args[i++] = "--objects-edge";
        else
                args[i++] = "--objects";
-       while (refs) {
-               char *buf = malloc(100);
-               if (i > 900)
+
+       /* First send the ones we care about most */
+       for (ref = refs; ref; ref = ref->next) {
+               if (900 < i)
                        die("git-rev-list environment overflow");
-               if (!is_zero_sha1(refs->old_sha1) &&
-                   has_sha1_file(refs->old_sha1)) {
+               if (!is_zero_sha1(ref->new_sha1)) {
+                       char *buf = malloc(100);
                        args[i++] = buf;
-                       snprintf(buf, 50, "^%s", sha1_to_hex(refs->old_sha1));
+                       snprintf(buf, 50, "%s", sha1_to_hex(ref->new_sha1));
                        buf += 50;
+                       if (!is_zero_sha1(ref->old_sha1) &&
+                           has_sha1_file(ref->old_sha1)) {
+                               args[i++] = buf;
+                               snprintf(buf, 50, "^%s",
+                                        sha1_to_hex(ref->old_sha1));
+                       }
                }
-               if (!is_zero_sha1(refs->new_sha1)) {
+       }
+
+       /* Then a handful of the remainder
+        * NEEDSWORK: we would be better off if used the newer ones first.
+        */
+       for (ref = refs, j = i + 16;
+            i < 900 && i < j && ref;
+            ref = ref->next) {
+               if (is_zero_sha1(ref->new_sha1) &&
+                   !is_zero_sha1(ref->old_sha1) &&
+                   has_sha1_file(ref->old_sha1)) {
+                       char *buf = malloc(42);
                        args[i++] = buf;
-                       snprintf(buf, 50, "%s", sha1_to_hex(refs->new_sha1));
+                       snprintf(buf, 42, "^%s", sha1_to_hex(ref->old_sha1));
                }
-               refs = refs->next;
        }
        args[i] = NULL;
        execv_git_cmd(args);
@@ -133,12 +151,12 @@ static int ref_newer(const unsigned char *new_sha1,
         * old.  Otherwise we require --force.
         */
        o = deref_tag(parse_object(old_sha1), NULL, 0);
-       if (!o || o->type != commit_type)
+       if (!o || o->type != OBJ_COMMIT)
                return 0;
        old = (struct commit *) o;
 
        o = deref_tag(parse_object(new_sha1), NULL, 0);
-       if (!o || o->type != commit_type)
+       if (!o || o->type != OBJ_COMMIT)
                return 0;
        new = (struct commit *) o;
 
@@ -221,7 +239,7 @@ static int send_pack(int in, int out, int nr_refspec, char **refspec)
        int expect_status_report = 0;
 
        /* No funny business with the matcher */
-       remote_tail = get_remote_heads(in, &remote_refs, 0, NULL, 1);
+       remote_tail = get_remote_heads(in, &remote_refs, 0, NULL, REF_NORMAL);
        get_local_heads();
 
        /* Does the other end support the reporting? */
@@ -344,6 +362,8 @@ int main(int argc, char **argv)
        pid_t pid;
 
        setup_git_directory();
+       git_config(git_default_config);
+
        argv++;
        for (i = 1; i < argc; i++, argv++) {
                char *arg = *argv;