git-branch -D: make it work even when on a yet-to-be-born branch

diff --git a/read-cache.c b/read-cache.c
index b6982eac416fe765e1a570cdb25298e83264c81e..eae4745d284e00e279b5b8f4b032bdb9ca433984 100644 (file)
--- a/read-cache.c
+++ b/read-cache.c
@@ -347,11 +347,13 @@ int add_file_to_index(const char *path, int verbose)
        ce->ce_mode = create_ce_mode(st.st_mode);
        if (!trust_executable_bit) {
                /* If there is an existing entry, pick the mode bits
-                * from it.
+                * from it, otherwise assume unexecutable.
                 */
                int pos = cache_name_pos(path, namelen);
                if (pos >= 0)
                        ce->ce_mode = active_cache[pos]->ce_mode;
+               else if (S_ISREG(st.st_mode))
+                       ce->ce_mode = create_ce_mode(S_IFREG | 0666);
        }
 
        if (index_path(ce->sha1, path, &st, 1))
@@ -842,6 +844,23 @@ int read_cache_from(const char *path)
        die("index file corrupt");
 }
 
+int discard_cache(void)
+{
+       int ret;
+
+       active_nr = active_cache_changed = 0;
+       index_file_timestamp = 0;
+       cache_tree_free(&active_cache_tree);
+       if (cache_mmap == NULL)
+               return 0;
+       ret = munmap(cache_mmap, cache_mmap_size);
+       cache_mmap = NULL;
+       cache_mmap_size = 0;
+
+       /* no need to throw away allocated active_cache */
+       return ret;
+}
+
 #define WRITE_BUFFER_SIZE 8192
 static unsigned char write_buffer[WRITE_BUFFER_SIZE];
 static unsigned long write_buffer_len;