Add new "git replace" command

diff --git a/builtin-push.c b/builtin-push.c
index 122fdcfbdc13a11388a091e5ec33d077648fab0a..c869974013b5c1bb563d4f9b306820362545c9ea 100644 (file)
--- a/builtin-push.c
+++ b/builtin-push.c
@@ -48,13 +48,81 @@ static void set_refspecs(const char **refs, int nr)
        }
 }
 
+static void setup_push_tracking(void)
+{
+       struct strbuf refspec = STRBUF_INIT;
+       struct branch *branch = branch_get(NULL);
+       if (!branch)
+               die("You are not currently on a branch.");
+       if (!branch->merge_nr)
+               die("The current branch %s is not tracking anything.",
+                   branch->name);
+       if (branch->merge_nr != 1)
+               die("The current branch %s is tracking multiple branches, "
+                   "refusing to push.", branch->name);
+       strbuf_addf(&refspec, "%s:%s", branch->name, branch->merge[0]->src);
+       add_refspec(refspec.buf);
+}
+
+static const char *warn_unconfigured_push_msg[] = {
+       "You did not specify any refspecs to push, and the current remote",
+       "has not configured any push refspecs. The default action in this",
+       "case is to push all matching refspecs, that is, all branches",
+       "that exist both locally and remotely will be updated.  This may",
+       "not necessarily be what you want to happen.",
+       "",
+       "You can specify what action you want to take in this case, and",
+       "avoid seeing this message again, by configuring 'push.default' to:",
+       "  'nothing'  : Do not push anything",
+       "  'matching' : Push all matching branches (default)",
+       "  'tracking' : Push the current branch to whatever it is tracking",
+       "  'current'  : Push the current branch"
+};
+
+static void warn_unconfigured_push(void)
+{
+       int i;
+       for (i = 0; i < ARRAY_SIZE(warn_unconfigured_push_msg); i++)
+               warning("%s", warn_unconfigured_push_msg[i]);
+}
+
+static void setup_default_push_refspecs(void)
+{
+       git_config(git_default_config, NULL);
+       switch (push_default) {
+       case PUSH_DEFAULT_UNSPECIFIED:
+               warn_unconfigured_push();
+               /* fallthrough */
+
+       case PUSH_DEFAULT_MATCHING:
+               add_refspec(":");
+               break;
+
+       case PUSH_DEFAULT_TRACKING:
+               setup_push_tracking();
+               break;
+
+       case PUSH_DEFAULT_CURRENT:
+               add_refspec("HEAD");
+               break;
+
+       case PUSH_DEFAULT_NOTHING:
+               die("You didn't specify any refspecs to push, and "
+                   "push.default is \"nothing\".");
+               break;
+       }
+}
+
 static int do_push(const char *repo, int flags)
 {
        int i, errs;
        struct remote *remote = remote_get(repo);
 
-       if (!remote)
-               die("bad repository '%s'", repo);
+       if (!remote) {
+               if (repo)
+                       die("bad repository '%s'", repo);
+               die("No destination configured to push to.");
+       }
 
        if (remote->mirror)
                flags |= (TRANSPORT_PUSH_MIRROR|TRANSPORT_PUSH_FORCE);
@@ -76,11 +144,12 @@ static int do_push(const char *repo, int flags)
                return error("--all and --mirror are incompatible");
        }
 
-       if (!refspec
-               && !(flags & TRANSPORT_PUSH_ALL)
-               && remote->push_refspec_nr) {
-               refspec = remote->push_refspec;
-               refspec_nr = remote->push_refspec_nr;
+       if (!refspec && !(flags & TRANSPORT_PUSH_ALL)) {
+               if (remote->push_refspec_nr) {
+                       refspec = remote->push_refspec;
+                       refspec_nr = remote->push_refspec_nr;
+               } else if (!(flags & TRANSPORT_PUSH_MIRROR))
+                       setup_default_push_refspecs();
        }
        errs = 0;
        for (i = 0; i < remote->url_nr; i++) {
@@ -129,7 +198,7 @@ int cmd_push(int argc, const char **argv, const char *prefix)
                OPT_END()
        };
 
-       argc = parse_options(argc, argv, options, push_usage, 0);
+       argc = parse_options(argc, argv, prefix, options, push_usage, 0);
 
        if (tags)
                add_refspec("refs/tags/*");