Merge branch 'kl/setup-in-unreadable-worktree'

Disable the "do not remove the directory the user started Git in"
logic when Git cannot tell where that directory is.  Earlier we
refused to run in such a case.

* kl/setup-in-unreadable-worktree:
  setup: don't die if realpath(3) fails on getcwd(3)

Author: gitster

setup.c

@@ -459,7 +459,16 @@ static void setup_original_cwd(void)
 	 */
 
 	/* Normalize the directory */
-	strbuf_realpath(&tmp, tmp_original_cwd, 1);
+	if (!strbuf_realpath(&tmp, tmp_original_cwd, 0)) {
+		trace2_data_string("setup", the_repository,
+				   "realpath-path", tmp_original_cwd);
+		trace2_data_string("setup", the_repository,
+				   "realpath-failure", strerror(errno));
+		free((char*)tmp_original_cwd);
+		tmp_original_cwd = NULL;
+		return;
+	}
+
 	free((char*)tmp_original_cwd);
 	tmp_original_cwd = NULL;
 	startup_info->original_cwd = strbuf_detach(&tmp, NULL);