+static char *unable_to_lock_message(const char *path, int err)
+{
+ struct strbuf buf = STRBUF_INIT;
+
+ if (err == EEXIST) {
+ strbuf_addf(&buf, "Unable to create '%s.lock': %s.\n\n"
+ "If no other git process is currently running, this probably means a\n"
+ "git process crashed in this repository earlier. Make sure no other git\n"
+ "process is running and remove the file manually to continue.",
+ make_nonrelative_path(path), strerror(err));
+ } else
+ strbuf_addf(&buf, "Unable to create '%s.lock': %s",
+ make_nonrelative_path(path), strerror(err));
+ return strbuf_detach(&buf, NULL);
+}
+
+int unable_to_lock_error(const char *path, int err)
+{
+ char *msg = unable_to_lock_message(path, err);
+ error("%s", msg);
+ free(msg);
+ return -1;
+}
+
+NORETURN void unable_to_lock_index_die(const char *path, int err)
+{
+ die("%s", unable_to_lock_message(path, err));
+}
+