From 428bf9aa74b2d9396c54b916e85577e288aa815c Mon Sep 17 00:00:00 2001
From: PJ Eby <pje@telecommunity.com>
Date: Tue, 28 Jul 2020 17:09:24 -0400
Subject: [PATCH] Fix #3: Infinite loop if no project directory

---
 src/Project.php | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/Project.php b/src/Project.php
index a3649a4..d3d68ed 100644
--- a/src/Project.php
+++ b/src/Project.php
@@ -114,7 +114,9 @@ static function parent_of($filename) {
 			$dir = dirname($filename);
 			if ( static::basename($filename) == 'index.md' ) {
 				if ( static::is_project($dir) ) return null;
-				$dir = dirname($dir);
+				$newdir = dirname($dir);
+				if ( $newdir === $dir ) return null;
+				$dir = $newdir;
 			}
 			$filename = $dir == '.' ? 'index.md' : "$dir/index.md";
 		} while ( ! file_exists($filename) || ! filesize($filename) );