wild swing at per-microgame PR builds

.github/workflows/build-pull-request.yml

@@ -28,6 +28,11 @@ jobs:
             const path = require('path');
             const script = require(path.resolve('.github/workflows/update-credits.js'));
             await script(github, context)
+      - name: Setup Godot
+        uses: lihop/setup-godot@v2
+      - name: Override config to launch specific microgame
+        shell: bash
+        run: godot -s .github/workflows/get_mg_scene_from_dir.gd --no-window "pixelart"
       - name: export with Godot Engine
         uses: firebelley/[email protected]
         with:

.github/workflows/get_mg_scene_from_dir.gd

@@ -0,0 +1,25 @@
+extends SceneTree
+
+
+func _init():
+    var mg_dir : String = OS.get_cmdline_args()[2]
+    var def : MicrogameDefinition = Utility.find_microgame_definitions_in_dir(
+        "res://microgames/" + mg_dir
+    )[0]
+    var mg_scene_path : String
+
+    for filepath in Utility.list_all_files(def.resource_path.get_base_dir(), "tscn"):
+        var scene_node = load(filepath).instance()
+        var is_microgame_scene : bool = scene_node.get_class() == "Microgame"
+        scene_node.free()
+
+        if is_microgame_scene:
+            mg_scene_path = filepath
+            break
+
+    var override_filepath := "override.cfg"
+
+    ProjectSettings.set_setting("application/run/main_scene", mg_scene_path)
+    ProjectSettings.save_custom(override_filepath)
+
+    quit()

core/microgame/microgame.gd

@@ -22,6 +22,10 @@ var is_timer_running : bool = false
 var is_success : bool = false
 
 
+func get_class() -> String:
+	return "Microgame"
+
+
 func _ready() -> void:
 	# set default success state
 	is_success = win_by_default

core/utility.gd

@@ -24,8 +24,11 @@ static func find_microgame_definitions_in_dir(directory_to_search : String = "re
 	return microgame_defs
 
 
-static func get_definition_from_microgame_scene(scene_path) -> MicrogameDefinition:
-	return find_microgame_definitions_in_dir(scene_path.get_base_dir())[0]
+static func get_definition_from_microgame_scene(scene_path : String) -> MicrogameDefinition:
+	var defs = find_microgame_definitions_in_dir(
+		scene_path.get_base_dir()
+	)
+	return defs[0] if defs.size() > 0 else null
 
 
 static func list_all_files(path: String, extension: String = "") -> Array: