revision: ignore side parents while running simplify-merges

diff --git a/revision.c b/revision.c
index 814b96ff53dd9f03cb1356bb9b0ab8683952d334..d1a4ef5da01d982ab4952acc0fc148fce8837026 100644 (file)
--- a/revision.c
+++ b/revision.c
@@ -1949,8 +1949,9 @@ static struct commit_list **simplify_one(struct rev_info *revs, struct commit *c
        }
 
        /*
-        * Do we know what commit all of our parents should be rewritten to?
-        * Otherwise we are not ready to rewrite this one yet.
+        * Do we know what commit all of our parents that matter
+        * should be rewritten to?  Otherwise we are not ready to
+        * rewrite this one yet.
         */
        for (cnt = 0, p = commit->parents; p; p = p->next) {
                pst = locate_simplify_state(revs, p->item);
@@ -1958,6 +1959,8 @@ static struct commit_list **simplify_one(struct rev_info *revs, struct commit *c
                        tail = &commit_list_insert(p->item, tail)->next;
                        cnt++;
                }
+               if (revs->first_parent_only)
+                       break;
        }
        if (cnt) {
                tail = &commit_list_insert(commit, tail)->next;
@@ -1970,8 +1973,13 @@ static struct commit_list **simplify_one(struct rev_info *revs, struct commit *c
        for (p = commit->parents; p; p = p->next) {
                pst = locate_simplify_state(revs, p->item);
                p->item = pst->simplified;
+               if (revs->first_parent_only)
+                       break;
        }
-       cnt = remove_duplicate_parents(commit);
+       if (!revs->first_parent_only)
+               cnt = remove_duplicate_parents(commit);
+       else
+               cnt = 1;
 
        /*
         * It is possible that we are a merge and one side branch