rerere: un-nest merge() further

By consistently using "upon failure, set 'ret' and jump to out"
pattern, flatten the function further.

Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/rerere.c b/rerere.c
index 93fdeec809c44cab70c7ac439c9f13ce2d1f3d46..9bef24f5b29e43fdde3ef5f625940ea27872c801 100644 (file)
--- a/rerere.c
+++ b/rerere.c
@@ -580,6 +580,7 @@ int rerere_remaining(struct string_list *merge_rr)
  */
 static int merge(const struct rerere_id *id, const char *path)
 {
+       FILE *f;
        int ret;
        mmfile_t cur = {NULL, 0}, base = {NULL, 0}, other = {NULL, 0};
        mmbuffer_t result = {NULL, 0};
@@ -588,8 +589,10 @@ static int merge(const struct rerere_id *id, const char *path)
         * Normalize the conflicts in path and write it out to
         * "thisimage" temporary file.
         */
-       if (handle_file(path, NULL, rerere_path(id, "thisimage")) < 0)
-               return 1;
+       if (handle_file(path, NULL, rerere_path(id, "thisimage")) < 0) {
+               ret = 1;
+               goto out;
+       }
 
        if (read_mmfile(&cur, rerere_path(id, "thisimage")) ||
            read_mmfile(&base, rerere_path(id, "preimage")) ||
@@ -603,29 +606,28 @@ static int merge(const struct rerere_id *id, const char *path)
         * low-level merge driver settings.
         */
        ret = ll_merge(&result, path, &base, NULL, &cur, "", &other, "", NULL);
-       if (!ret) {
-               FILE *f;
+       if (ret)
+               goto out;
 
-               /*
-                * A successful replay of recorded resolution.
-                * Mark that "postimage" was used to help gc.
-                */
-               if (utime(rerere_path(id, "postimage"), NULL) < 0)
-                       warning("failed utime() on %s: %s",
-                               rerere_path(id, "postimage"),
-                               strerror(errno));
-
-               /* Update "path" with the resolution */
-               f = fopen(path, "w");
-               if (!f)
-                       return error("Could not open %s: %s", path,
-                                    strerror(errno));
-               if (fwrite(result.ptr, result.size, 1, f) != 1)
-                       error("Could not write %s: %s", path, strerror(errno));
-               if (fclose(f))
-                       return error("Writing %s failed: %s", path,
-                                    strerror(errno));
-       }
+       /*
+        * A successful replay of recorded resolution.
+        * Mark that "postimage" was used to help gc.
+        */
+       if (utime(rerere_path(id, "postimage"), NULL) < 0)
+               warning("failed utime() on %s: %s",
+                       rerere_path(id, "postimage"),
+                       strerror(errno));
+
+       /* Update "path" with the resolution */
+       f = fopen(path, "w");
+       if (!f)
+               return error("Could not open %s: %s", path,
+                            strerror(errno));
+       if (fwrite(result.ptr, result.size, 1, f) != 1)
+               error("Could not write %s: %s", path, strerror(errno));
+       if (fclose(f))
+               return error("Writing %s failed: %s", path,
+                            strerror(errno));
 
 out:
        free(cur.ptr);