Add strbuf_read_file().

diff --git a/read-cache.c b/read-cache.c
index 2e40a344209e010e664758865846b63dc9546c1f..56202d13dfcfe4ed583fee7b4063596bc1ef417e 100644 (file)
--- a/read-cache.c
+++ b/read-cache.c
@@ -1136,7 +1136,7 @@ int write_index(struct index_state *istate, int newfd)
 {
        SHA_CTX c;
        struct cache_header hdr;
-       int i, removed;
+       int i, err, removed;
        struct cache_entry **cache = istate->cache;
        int entries = istate->cache_nr;
 
@@ -1165,16 +1165,15 @@ int write_index(struct index_state *istate, int newfd)
 
        /* Write extension data here */
        if (istate->cache_tree) {
-               unsigned long sz;
-               void *data = cache_tree_write(istate->cache_tree, &sz);
-               if (data &&
-                   !write_index_ext_header(&c, newfd, CACHE_EXT_TREE, sz) &&
-                   !ce_write(&c, newfd, data, sz))
-                       free(data);
-               else {
-                       free(data);
+               struct strbuf sb;
+
+               strbuf_init(&sb, 0);
+               cache_tree_write(&sb, istate->cache_tree);
+               err = write_index_ext_header(&c, newfd, CACHE_EXT_TREE, sb.len) < 0
+                       || ce_write(&c, newfd, sb.buf, sb.len) < 0;
+               strbuf_release(&sb);
+               if (err)
                        return -1;
-               }
        }
        return ce_flush(&c, newfd);
 }