Lua : add missing FileSystem members, clean up some of the lfs extern declarations

std/lua/_std/sys/FileSystem.hx

@@ -21,8 +21,77 @@
  */
 package sys;
 
+import lua.lib.lfs.Lfs;
+import lua.Io;
+import lua.Os;
+import lua.Lib;
+import haxe.io.Path;
+
 class FileSystem {
 	public static function exists( path : String ) : Bool {
+		if (path == null) return false;
+		else{
+			var f = Io.open(path);
+			if (f == null) return false;
+			else {
+				f.close();
+				return true;
+			}
+		}
+	}
+
+	public inline static function rename( path : String, newPath : String ) : Void {
+		return  Os.rename(path, newPath);
+	}
+
+	public inline static function stat( path : String ) : FileStat {
+		// the lua lfs attributes command uses a string for "mode".
+		// we just need to patch it.
+
+		var attr : sys.FileStat = cast Lfs.attributes(path);
+		var lfs_mode : String = cast(attr.mode, String);
+		var mode = switch(lfs_mode){
+			case "file"         : 0x0100000;
+			case "directory"    : 0x0040000;
+			case "link"         : 0x0120000;
+			case "socket"       : 0x0140000;
+			case "named pipe"   : 0x0010000;
+			case "char device"  : 0x0020000;
+			case "block device" : 0x0060000;
+			default             : 0x0000000;
+		}
+		attr.mode = mode;
+		return attr;
+	}
+
+	public inline static function fullPath( relPath : String ) : String {
+		return Path.normalize(absolutePath(relPath));
+	}
+
+	public inline static function absolutePath( relPath : String ) : String {
+		if (relPath == null) return null;
+		var pwd = Lfs.currentdir() ;
+		if (pwd == null) return relPath;
+		return Path.join([pwd, relPath]);
+	}
+
+	public inline static function deleteFile( path : String ) : Void {
+		lua.Os.remove(path);
+	}
+
+	public inline static function readDirectory( path : String ) : Array<String> {
+		return lua.Lib.fillArray(Lfs.dir(path));
+	}
+
+	public inline static function isDirectory( path : String ) : Bool {
+		return  Lfs.attributes(path, "mode") ==  "directory";
+	}
+
+	public inline static function deleteDirectory( path : String ) : Void {
+		Lfs.rmdir(path);
+	}
 
+	public inline static function createDirectory( path : String ) : Void {
+	   Lfs.mkdir(path);
 	}
 }

std/lua/lib/lfs/Lfs.hx

@@ -22,7 +22,9 @@
 package lua.lib.lfs;
 @:luaRequire("lfs")
 extern class Lfs {
-	public static function attributes(filepath : String, ?aname : String) : Table<String, String>;
+	@:overload(   function			 (filepath : String, aname : String) : Dynamic {})
+	public static function attributes(filepath : String) : LfsFileStat;
+
 	public static function chdir(path : String) : Bool;
 	public static function lock_dir(path : String, ?second_stale : Int) : String; 
 	public static function currentdir() : String;

std/lua/lib/lfs/LfsFileStat.hx

@@ -0,0 +1,46 @@
+/*
+ * Copyright (C)2005-2016 Haxe Foundation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+package lua.lib.lfs;
+
+/**
+	File informations, as given by [sys.FileSystem.stat]
+**/
+typedef LfsFileStat = {
+	/** the user group id for the file **/
+	var gid : Int;
+	/** the user id for the file **/
+	var uid : Int;
+	/** the last access time for the file (when enabled by the file system) **/
+	var atime : Date;
+	/** the last modification time for the file **/
+	var mtime : Date;
+	/** the creation time for the file (not all filesystems support this) **/
+	var ctime : Date;
+	/** the size of the file **/
+	var size : Int;
+	var dev : Int;
+	var ino : Int;
+	var nlink : Int;
+	var rdev : Int;
+	var mode : String;
+}
+