Avoid segfault with 'git branch' when the HEAD is detached

[git.git] / commit.c

diff --git a/commit.c b/commit.c
index 10e532afe1b383a2f49702f9ff0e932ccab43a43..aa3b35b6a86891ac9d0628e20a6a46d506bf7700 100644 (file)
--- a/commit.c
+++ b/commit.c
@@ -5,7 +5,6 @@
 #include "utf8.h"
 #include "diff.h"
 #include "revision.h"
-#include "notes.h"
 
 int save_commit_buffer = 1;
 
@@ -706,6 +705,21 @@ struct commit_list *get_merge_bases(struct commit *one, struct commit *two,
        return get_merge_bases_many(one, 1, &two, cleanup);
 }
 
+int is_descendant_of(struct commit *commit, struct commit_list *with_commit)
+{
+       if (!with_commit)
+               return 1;
+       while (with_commit) {
+               struct commit *other;
+
+               other = with_commit->item;
+               with_commit = with_commit->next;
+               if (in_merge_bases(other, &commit, 1))
+                       return 1;
+       }
+       return 0;
+}
+
 int in_merge_bases(struct commit *commit, struct commit **reference, int num)
 {
        struct commit_list *bases, *b;