builtin/merge.c: collect other parents early

Move the code around to populate remoteheads list early in the process
before any decision regarding twohead vs octopus and fast-forwardness is
made.

Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/builtin/merge.c b/builtin/merge.c
index c5ca70b..2cef2f6 100644 (file)
--- a/builtin/merge.c
+++ b/builtin/merge.c
@@ -1137,6 +1137,21 @@ static int default_edit_option(void)
                st_stdin.st_mode == st_stdout.st_mode);
 }
 
+static struct commit_list *collect_parents(int argc, const char **argv)
+{
+       int i;
+       struct commit_list *remoteheads = NULL;
+       struct commit_list **remotes = &remoteheads;
+
+       for (i = 0; i < argc; i++) {
+               struct commit *commit = get_merge_parent(argv[i]);
+               if (!commit)
+                       die(_("%s - not something we can merge"), argv[i]);
+               remotes = &commit_list_insert(commit, remotes)->next;
+       }
+       *remotes = NULL;
+       return remoteheads;
+}
 
 int cmd_merge(int argc, const char **argv, const char *prefix)
 {
@@ -1150,8 +1165,7 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
        int best_cnt = -1, merge_was_ok = 0, automerge_was_ok = 0;
        struct commit_list *common = NULL;
        const char *best_strategy = NULL, *wt_strategy = NULL;
-       struct commit_list *remoteheads = NULL;
-       struct commit_list **remotes = &remoteheads;
+       struct commit_list *remoteheads, *p;
        void *branch_to_free;
 
        if (argc == 2 && !strcmp(argv[1], "-h"))
@@ -1256,6 +1270,7 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
                head_arg = argv[1];
                argv += 2;
                argc -= 2;
+               remoteheads = collect_parents(argc, argv);
        } else if (!head_commit) {
                struct commit *remote_head;
                /*
@@ -1271,7 +1286,8 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
                if (!allow_fast_forward)
                        die(_("Non-fast-forward commit does not make sense into "
                            "an empty head"));
-               remote_head = get_merge_parent(argv[0]);
+               remoteheads = collect_parents(argc, argv);
+               remote_head = remoteheads->item;
                if (!remote_head)
                        die(_("%s - not something we can merge"), argv[0]);
                read_empty(remote_head->object.sha1, 0);
@@ -1289,8 +1305,9 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
                 * the standard merge summary message to be appended
                 * to the given message.
                 */
-               for (i = 0; i < argc; i++)
-                       merge_name(argv[i], &merge_names);
+               remoteheads = collect_parents(argc, argv);
+               for (p = remoteheads; p; p = p->next)
+                       merge_name(merge_remote_util(p->item)->name, &merge_names);
 
                if (!have_message || shortlog_len) {
                        struct fmt_merge_msg_opts opts;
@@ -1309,19 +1326,16 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
                        builtin_merge_options);
 
        strbuf_addstr(&buf, "merge");
-       for (i = 0; i < argc; i++)
-               strbuf_addf(&buf, " %s", argv[i]);
+       for (p = remoteheads; p; p = p->next)
+               strbuf_addf(&buf, " %s", merge_remote_util(p->item)->name);
        setenv("GIT_REFLOG_ACTION", buf.buf, 0);
        strbuf_reset(&buf);
 
-       for (i = 0; i < argc; i++) {
-               struct commit *commit = get_merge_parent(argv[i]);
-               if (!commit)
-                       die(_("%s - not something we can merge"), argv[i]);
-               remotes = &commit_list_insert(commit, remotes)->next;
+       for (p = remoteheads; p; p = p->next) {
+               struct commit *commit = p->item;
                strbuf_addf(&buf, "GITHEAD_%s",
                            sha1_to_hex(commit->object.sha1));
-               setenv(buf.buf, argv[i], 1);
+               setenv(buf.buf, merge_remote_util(commit)->name, 1);
                strbuf_reset(&buf);
                if (!fast_forward_only &&
                    merge_remote_util(commit) &&