treat non-existing files as success on delete

_test/tests/inc/io_rmdir.test.php

@@ -2,6 +2,66 @@
 
 class io_rmdir_test extends DokuWikiTest {
 
+    function test_nopes(){
+        // set up test dir
+        $dir = io_mktmpdir();
+        $top = dirname($dir);
+        $this->assertTrue($dir !== false);
+        $this->assertTrue(is_dir($dir));
+
+        // switch into it
+        $this->assertTrue(chdir($dir));
+        $this->assertEquals($dir, getcwd());
+
+
+        $this->assertFalse(io_rmdir('', false));
+        clearstatcache();
+        $this->assertTrue(is_dir($dir));
+        $this->assertTrue(is_dir($top));
+
+        $this->assertFalse(io_rmdir('', true));
+        clearstatcache();
+        $this->assertTrue(is_dir($dir));
+        $this->assertTrue(is_dir($top));
+
+        $this->assertFalse(io_rmdir(null, false));
+        clearstatcache();
+        $this->assertTrue(is_dir($dir));
+        $this->assertTrue(is_dir($top));
+
+        $this->assertFalse(io_rmdir(null, true));
+        clearstatcache();
+        $this->assertTrue(is_dir($dir));
+        $this->assertTrue(is_dir($top));
+
+        $this->assertFalse(io_rmdir(false, false));
+        clearstatcache();
+        $this->assertTrue(is_dir($dir));
+        $this->assertTrue(is_dir($top));
+
+        $this->assertFalse(io_rmdir(false, true));
+        clearstatcache();
+        $this->assertTrue(is_dir($dir));
+        $this->assertTrue(is_dir($top));
+
+        $this->assertFalse(io_rmdir(array(), false));
+        clearstatcache();
+        $this->assertTrue(is_dir($dir));
+        $this->assertTrue(is_dir($top));
+
+        $this->assertFalse(io_rmdir(array(), true));
+        clearstatcache();
+        $this->assertTrue(is_dir($dir));
+        $this->assertTrue(is_dir($top));
+
+        $this->assertFileNotExists("$dir/this/does/not/exist");
+        $this->assertTrue(io_rmdir("$dir/this/does/not/exist"));
+        clearstatcache();
+        $this->assertFileNotExists("$dir/this/does/not/exist");
+        $this->assertTrue(is_dir($dir));
+        $this->assertTrue(is_dir($top));
+    }
+
 
     function test_empty_single(){
         // set up test dir

inc/io.php

@@ -410,6 +410,7 @@ function io_mkdir_p($target){
  */
 function io_rmdir($path, $removefiles = false) {
     if(!is_string($path) || $path == "") return false;
+    if(!file_exists($path)) return true; // it's already gone or was never there, count as success
 
     if(is_dir($path) && !is_link($path)) {
         $dirs  = array();