fix macro not running without explicit import

standalone-openfl-app/build.hxml

@@ -25,4 +25,5 @@
 --macro keep("Main")
 --macro keep("Assets")
 --macro keep("AssetMacro")
+--macro macros.AssetMacro.includeAssets()
 # --macro macros.MacroLoader.run()

standalone-openfl-app/src/Main.hx

@@ -25,7 +25,7 @@ class Main extends Sprite {
         }
         
         // test a data asset
-        var testAsset = dataLibrary.getText("img/placeholder.txt");
+        var testAsset = dataLibrary.getText("txt/placeholder.txt");
         trace("Successfully loaded asset: " + testAsset);
         // test an image asset
         var testImage = imageLibrary.getImage("logo.png");

standalone-openfl-app/src/macros/AssetMacro.hx

@@ -1,8 +1,8 @@
 package macros;
 
+#if macro
 import haxe.macro.Context;
 import haxe.macro.Expr;
-import haxe.macro.Type;
 import sys.FileSystem;
 import sys.io.File;
 import haxe.Json;
@@ -16,6 +16,11 @@ class AssetMacro {
     // Track all assets processed
     private static var assetMap:Map<String, Array<{id:String, path:String, size:Int, type:String}>> = new Map();
 
+    /** Force Assets to be typed, which invokes its @:build macro. */
+    public static function includeAssets():Void {
+        Context.getType("Assets");
+    }
+    
     /**
      * Entry point for the macro - called during compilation
      */
@@ -41,7 +46,10 @@ class AssetMacro {
         var manifestDir = outputDir + "/manifest";
         var assetsOutputDir = outputDir + "/assets";
         
-        // Create directories if they don't exist
+        // These directories are owned by this macro. Recreate them so removed or
+        // renamed source assets cannot survive as stale build output.
+        removeDirectory(manifestDir);
+        removeDirectory(assetsOutputDir);
         createDirectory(manifestDir);
         createDirectory(assetsOutputDir);
         copyLimeNativeLibrary(outputDir);
@@ -241,6 +249,20 @@ class AssetMacro {
         }
     }
     
+    private static function removeDirectory(path:String):Void {
+        if (!FileSystem.exists(path)) return;
+
+        for (entry in FileSystem.readDirectory(path)) {
+            var entryPath = path + "/" + entry;
+            if (FileSystem.isDirectory(entryPath)) {
+                removeDirectory(entryPath);
+            } else {
+                FileSystem.deleteFile(entryPath);
+            }
+        }
+        FileSystem.deleteDirectory(path);
+    }
+
     /** Stage the Lime CFFI module that matches the selected haxelib version. */
     private static function copyLimeNativeLibrary(outputDir:String):Void {
         var platformDirectory = if (Context.defined("linux")) {
@@ -313,3 +335,4 @@ class AssetMacro {
         }).toUpperCase();
     }
 }
+#end