Merge branch 'js/maint-merge-recursive-r-d-conflict' into maint

[git.git] / merge-recursive.c

diff --git a/merge-recursive.c b/merge-recursive.c
index 69e71522048a3eeb70a093ae3c17a225168e932b..b97026bd5cc1d2ef1b46a9ef3dcd7562ad52c377 100644 (file)
--- a/merge-recursive.c
+++ b/merge-recursive.c
@@ -447,6 +447,30 @@ static void flush_buffer(int fd, const char *buf, unsigned long size)
        }
 }
 
+static int would_lose_untracked(const char *path)
+{
+       int pos = cache_name_pos(path, strlen(path));
+
+       if (pos < 0)
+               pos = -1 - pos;
+       while (pos < active_nr &&
+              !strcmp(path, active_cache[pos]->name)) {
+               /*
+                * If stage #0, it is definitely tracked.
+                * If it has stage #2 then it was tracked
+                * before this merge started.  All other
+                * cases the path was not tracked.
+                */
+               switch (ce_stage(active_cache[pos])) {
+               case 0:
+               case 2:
+                       return 0;
+               }
+               pos++;
+       }
+       return file_exists(path);
+}
+
 static int make_room_for_path(const char *path)
 {
        int status;
@@ -462,6 +486,14 @@ static int make_room_for_path(const char *path)
                die(msg, path, "");
        }
 
+       /*
+        * Do not unlink a file in the work tree if we are not
+        * tracking it.
+        */
+       if (would_lose_untracked(path))
+               return error("refusing to lose untracked file at '%s'",
+                            path);
+
        /* Successful unlink is good.. */
        if (!unlink(path))
                return 0;