allow multiple extension convert, added dummy convert to keep entry but remove file content

hxd/fs/Convert.hx

@@ -3,7 +3,7 @@ package hxd.fs;
 @:keep @:keepSub
 class Convert {
 
-	public var sourceExt(default,null) : String;
+	public var sourceExts(default,null) : Array<String>;
 	public var destExt(default,null) : String;
 
 	/**
@@ -18,8 +18,8 @@ class Convert {
 	public var originalFilename : String;
 	public var srcBytes : haxe.io.Bytes;
 
-	public function new( sourceExt, destExt ) {
-		this.sourceExt = sourceExt;
+	public function new( sourceExts, destExt ) {
+		this.sourceExts = sourceExts == null ? null : sourceExts.split(",");
 		this.destExt = destExt;
 		this.version = 0;
 	}
@@ -51,18 +51,13 @@ class Convert {
 	}
 
 	static var converts = new Map<String,Array<Convert>>();
-	public static function register( ?c : Convert, ?arr : Array<Convert> ) : Int {
-		if( c != null ) {
-			var dest = converts.get(c.destExt);
-			if( dest == null ) {
-				dest = [];
-				converts.set(c.destExt, dest);
-			}
-			dest.unshift(c); // latest registered get priority ! (allow override defaults)
+	public static function register( c : Convert ) : Int {
+		var dest = converts.get(c.destExt);
+		if( dest == null ) {
+			dest = [];
+			converts.set(c.destExt, dest);
 		}
-		if( arr != null )
-			for( c in arr )
-				register(c);
+		dest.unshift(c); // latest registered get priority ! (allow override defaults)
 		return 0;
 	}
 
@@ -215,11 +210,16 @@ class CompressIMG extends Convert {
 		command("CompressonatorCLI", ["-silent","-fd",getParam("format"),srcPath,dstPath]);
 	}
 
-	static var _ = Convert.register([
-		new CompressIMG("png","dds"),
-		new CompressIMG("tga","dds"),
-		new CompressIMG("jpg","dds"),
-		new CompressIMG("jpeg","dds")
-	]);
+	static var _ = Convert.register(new CompressIMG("png,tga,jpg,jpeg","dds"));
+
+}
+
+class DummyConvert extends Convert {
+
+	override function convert() {
+		save(haxe.io.Bytes.alloc(0));
+	}
+
+	static var _ = Convert.register(new DummyConvert(null,"dummy"));
 
 }

hxd/fs/FileConverter.hx

@@ -184,12 +184,18 @@ class FileConverter {
 			outFile += "."+cmd.paramsStr;
 		var conv = null;
 		for( c in cmd.conv )
-			if( c.sourceExt == ext ) {
+			if( c.sourceExts == null || c.sourceExts.indexOf(ext) >= 0 ) {
 				conv = c;
 				break;
 			}
 		if( conv == null )
 			throw "No converter is registered that can convert "+e.path+" to "+cmd.conv[0].destExt;
+		if( conv.destExt == "dummy" ) {
+			e.file = baseDir + tmpDir + ".dummy";
+			if( !sys.FileSystem.exists(e.file) )
+				sys.io.File.saveContent(e.file,"");
+			return;
+		}
 		outFile += "."+conv.destExt;
 		convertAndCache(e, outFile, conv, cmd.params);
 		if( cmd.then != null ) {