autoconf: Checks for libraries

diff --git a/fetch-pack.c b/fetch-pack.c
index 8daa93d024158e6d8daff304db57ac80d1803c65..f2c51ebe4b2b524e5d5bce6af8aa3105df19f177 100644 (file)
--- a/fetch-pack.c
+++ b/fetch-pack.c
@@ -18,8 +18,14 @@ static const char *exec = "git-upload-pack";
 #define SEEN           (1U << 3)
 #define POPPED         (1U << 4)
 
+/*
+ * After sending this many "have"s if we do not get any new ACK , we
+ * give up traversing our history.
+ */
+#define MAX_IN_VAIN 256
+
 static struct commit_list *rev_list = NULL;
-static int non_common_revs = 0, multi_ack = 0, use_thin_pack = 0;
+static int non_common_revs = 0, multi_ack = 0, use_thin_pack = 0, use_sideband;
 
 static void rev_list_push(struct commit *commit, int mark)
 {
@@ -40,7 +46,7 @@ static int rev_list_insert_ref(const char *path, const unsigned char *sha1)
 {
        struct object *o = deref_tag(parse_object(sha1), path, 0);
 
-       if (o && o->type == commit_type)
+       if (o && o->type == TYPE_COMMIT)
                rev_list_push((struct commit *)o, SEEN);
 
        return 0;
@@ -134,6 +140,8 @@ static int find_common(int fd[2], unsigned char *result_sha1,
        int fetching;
        int count = 0, flushes = 0, retval;
        const unsigned char *sha1;
+       unsigned in_vain = 0;
+       int got_continue = 0;
 
        for_each_ref(rev_list_insert_ref);
 
@@ -157,9 +165,14 @@ static int find_common(int fd[2], unsigned char *result_sha1,
                        continue;
                }
 
-               packet_write(fd[1], "want %s%s%s\n", sha1_to_hex(remote),
-                            (multi_ack ? " multi_ack" : ""),
-                            (use_thin_pack ? " thin-pack" : ""));
+               if (!fetching)
+                       packet_write(fd[1], "want %s%s%s%s\n",
+                                    sha1_to_hex(remote),
+                                    (multi_ack ? " multi_ack" : ""),
+                                    (use_sideband ? " side-band" : ""),
+                                    (use_thin_pack ? " thin-pack" : ""));
+               else
+                       packet_write(fd[1], "want %s\n", sha1_to_hex(remote));
                fetching++;
        }
        packet_flush(fd[1]);
@@ -172,6 +185,7 @@ static int find_common(int fd[2], unsigned char *result_sha1,
                packet_write(fd[1], "have %s\n", sha1_to_hex(sha1));
                if (verbose)
                        fprintf(stderr, "have %s\n", sha1_to_hex(sha1));
+               in_vain++;
                if (!(31 & ++count)) {
                        int ack;
 
@@ -200,9 +214,16 @@ static int find_common(int fd[2], unsigned char *result_sha1,
                                                lookup_commit(result_sha1);
                                        mark_common(commit, 0, 1);
                                        retval = 0;
+                                       in_vain = 0;
+                                       got_continue = 1;
                                }
                        } while (ack);
                        flushes--;
+                       if (got_continue && MAX_IN_VAIN < in_vain) {
+                               if (verbose)
+                                       fprintf(stderr, "giving up\n");
+                               break; /* give up */
+                       }
                }
        }
 done:
@@ -235,14 +256,14 @@ static int mark_complete(const char *path, const unsigned char *sha1)
 {
        struct object *o = parse_object(sha1);
 
-       while (o && o->type == tag_type) {
+       while (o && o->type == TYPE_TAG) {
                struct tag *t = (struct tag *) o;
                if (!t->tagged)
                        break; /* broken repository */
                o->flags |= COMPLETE;
                o = parse_object(t->tagged->sha1);
        }
-       if (o && o->type == commit_type) {
+       if (o && o->type == TYPE_COMMIT) {
                struct commit *commit = (struct commit *)o;
                commit->object.flags |= COMPLETE;
                insert_by_date(commit, &complete);
@@ -336,7 +357,7 @@ static int everything_local(struct ref **refs, int nr_match, char **match)
                 * in sync with the other side at some time after
                 * that (it is OK if we guess wrong here).
                 */
-               if (o->type == commit_type) {
+               if (o->type == TYPE_COMMIT) {
                        struct commit *commit = (struct commit *)o;
                        if (!cutoff || cutoff < commit->date)
                                cutoff = commit->date;
@@ -355,7 +376,7 @@ static int everything_local(struct ref **refs, int nr_match, char **match)
                struct object *o = deref_tag(lookup_object(ref->old_sha1),
                                             NULL, 0);
 
-               if (!o || o->type != commit_type || !(o->flags & COMPLETE))
+               if (!o || o->type != TYPE_COMMIT || !(o->flags & COMPLETE))
                        continue;
 
                if (!(o->flags & SEEN)) {
@@ -405,6 +426,11 @@ static int fetch_pack(int fd[2], int nr_match, char **match)
                        fprintf(stderr, "Server supports multi_ack\n");
                multi_ack = 1;
        }
+       if (server_supports("side-band")) {
+               if (verbose)
+                       fprintf(stderr, "Server supports side-band\n");
+               use_sideband = 1;
+       }
        if (!ref) {
                packet_flush(fd[1]);
                die("no matching remote head");
@@ -421,9 +447,9 @@ static int fetch_pack(int fd[2], int nr_match, char **match)
                        fprintf(stderr, "warning: no common commits\n");
 
        if (keep_pack)
-               status = receive_keep_pack(fd, "git-fetch-pack", quiet);
+               status = receive_keep_pack(fd, "git-fetch-pack", quiet, use_sideband);
        else
-               status = receive_unpack_pack(fd, "git-fetch-pack", quiet);
+               status = receive_unpack_pack(fd, "git-fetch-pack", quiet, use_sideband);
 
        if (status)
                die("git-fetch-pack: fetch failed.");