[PATCH 5/5] refs.c: add an err argument to pack_refs

@@ -10,6 +10,7 @@ static char const * const pack_refs_usage[] = {
 int cmd_pack_refs(int argc, const char **argv, const char *prefix)
 {
 	unsigned int flags = PACK_REFS_PRUNE;
+	struct strbuf err = STRBUF_INIT;
 	struct option opts[] = {
 		OPT_BIT(0, "all",   &flags, N_("pack everything"), PACK_REFS_ALL),
 		OPT_BIT(0, "prune", &flags, N_("prune loose refs (default)"), PACK_REFS_PRUNE),

@@ -17,5 +18,10 @@ int cmd_pack_refs(int argc, const char **argv, const char *prefix)
 	};
 	if (parse_options(argc, argv, prefix, opts, pack_refs_usage, 0))
 		usage_with_options(pack_refs_usage, opts);
-	return pack_refs(flags);
+	if (pack_refs(flags, &err)) {
+		error("%s", err.buf);
+		strbuf_release(&err);
+		return 1;
+	}
+	return 0;
 }

@@ -2328,7 +2328,7 @@ static int commit_packed_refs(struct strbuf *err)
 		strbuf_addf(err, "error writing packed-refs. %s",
 			    strerror(errno));
 		return -1;
-       }
+	}
 
 	data.fd = packed_ref_cache->lock->fd;
 	data.err = err;

@@ -2482,24 +2482,23 @@ static void prune_refs(struct ref_to_prune *r)
 	}
 }
 
-int pack_refs(unsigned int flags)
+int pack_refs(unsigned int flags, struct strbuf *err)
 {
 	struct pack_refs_cb_data cbdata;
-	struct strbuf err = STRBUF_INIT;
 
 	memset(&cbdata, 0, sizeof(cbdata));
 	cbdata.flags = flags;
 
-	if (lock_packed_refs(&err))
-		die("%s", err.buf);
+	if (lock_packed_refs(err))
+		return -1;
 
 	cbdata.packed_refs = get_packed_refs(&ref_cache);
 
 	do_for_each_entry_in_dir(get_loose_refs(&ref_cache), 0,
 				 pack_if_possible_fn, &cbdata);
 
-	if (commit_packed_refs(&err))
-		die("%s", err.buf);
+	if (commit_packed_refs(err))
+		return -1;
 
 	prune_refs(cbdata.ref_to_prune);
 	return 0;

@@ -122,8 +122,9 @@ extern void warn_dangling_symrefs(FILE *fp, const char *msg_fmt, const struct st
 /*
  * Write a packed-refs file for the current repository.
  * flags: Combination of the above PACK_REFS_* flags.
+ * Returns 0 on success and fills in err on failure.
  */
-int pack_refs(unsigned int flags);
+int pack_refs(unsigned int flags, struct strbuf *err);
 
 extern int ref_exists(const char *);