index-pack: work around thread-unsafe pread()

diff --git a/builtin/push.c b/builtin/push.c
index a73982a30879f89be939034e462df68ee2c51c0b..0e50ddbb01342128d9118217118726000bdeaff6 100644 (file)
--- a/builtin/push.c
+++ b/builtin/push.c
@@ -35,35 +35,75 @@ static void add_refspec(const char *ref)
        refspec[refspec_nr-1] = ref;
 }
 
-static void set_refspecs(const char **refs, int nr)
+static const char *map_refspec(const char *ref,
+                              struct remote *remote, struct ref *local_refs)
 {
+       struct ref *matched = NULL;
+
+       /* Does "ref" uniquely name our ref? */
+       if (count_refspec_match(ref, local_refs, &matched) != 1)
+               return ref;
+
+       if (remote->push) {
+               struct refspec query;
+               memset(&query, 0, sizeof(struct refspec));
+               query.src = matched->name;
+               if (!query_refspecs(remote->push, remote->push_refspec_nr, &query) &&
+                   query.dst) {
+                       struct strbuf buf = STRBUF_INIT;
+                       strbuf_addf(&buf, "%s%s:%s",
+                                   query.force ? "+" : "",
+                                   query.src, query.dst);
+                       return strbuf_detach(&buf, NULL);
+               }
+       }
+
+       if (push_default == PUSH_DEFAULT_UPSTREAM &&
+           !prefixcmp(matched->name, "refs/heads/")) {
+               struct branch *branch = branch_get(matched->name + 11);
+               if (branch->merge_nr == 1 && branch->merge[0]->src) {
+                       struct strbuf buf = STRBUF_INIT;
+                       strbuf_addf(&buf, "%s:%s",
+                                   ref, branch->merge[0]->src);
+                       return strbuf_detach(&buf, NULL);
+               }
+       }
+
+       return ref;
+}
+
+static void set_refspecs(const char **refs, int nr, const char *repo)
+{
+       struct remote *remote = NULL;
+       struct ref *local_refs = NULL;
        int i;
+
        for (i = 0; i < nr; i++) {
                const char *ref = refs[i];
                if (!strcmp("tag", ref)) {
-                       char *tag;
-                       int len;
+                       struct strbuf tagref = STRBUF_INIT;
                        if (nr <= ++i)
                                die(_("tag shorthand without <tag>"));
-                       len = strlen(refs[i]) + 11;
-                       if (deleterefs) {
-                               tag = xmalloc(len+1);
-                               strcpy(tag, ":refs/tags/");
-                       } else {
-                               tag = xmalloc(len);
-                               strcpy(tag, "refs/tags/");
+                       ref = refs[i];
+                       if (deleterefs)
+                               strbuf_addf(&tagref, ":refs/tags/%s", ref);
+                       else
+                               strbuf_addf(&tagref, "refs/tags/%s", ref);
+                       ref = strbuf_detach(&tagref, NULL);
+               } else if (deleterefs) {
+                       struct strbuf delref = STRBUF_INIT;
+                       if (strchr(ref, ':'))
+                               die(_("--delete only accepts plain target ref names"));
+                       strbuf_addf(&delref, ":%s", ref);
+                       ref = strbuf_detach(&delref, NULL);
+               } else if (!strchr(ref, ':')) {
+                       if (!remote) {
+                               /* lazily grab remote and local_refs */
+                               remote = remote_get(repo);
+                               local_refs = get_local_heads();
                        }
-                       strcat(tag, refs[i]);
-                       ref = tag;
-               } else if (deleterefs && !strchr(ref, ':')) {
-                       char *delref;
-                       int len = strlen(ref)+1;
-                       delref = xmalloc(len+1);
-                       strcpy(delref, ":");
-                       strcat(delref, ref);
-                       ref = delref;
-               } else if (deleterefs)
-                       die(_("--delete only accepts plain target ref names"));
+                       ref = map_refspec(ref, remote, local_refs);
+               }
                add_refspec(ref);
        }
 }
@@ -501,7 +541,7 @@ int cmd_push(int argc, const char **argv, const char *prefix)
 
        if (argc > 0) {
                repo = argv[0];
-               set_refspecs(argv + 1, argc - 1);
+               set_refspecs(argv + 1, argc - 1, repo);
        }
 
        rc = do_push(repo, flags);