use do() instead of require() to include configuration

diff --git a/read-cache.c b/read-cache.c
index b6982eac416fe765e1a570cdb25298e83264c81e..20c9d494ac94380c9074997e9cb3c69ff1c04a3f 100644 (file)
--- a/read-cache.c
+++ b/read-cache.c
@@ -842,6 +842,23 @@ int read_cache_from(const char *path)
        die("index file corrupt");
 }
 
+int discard_cache()
+{
+       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;