Use scripts to create levels, add level selector

game.gd

@@ -31,8 +31,36 @@ func load_state() -> bool:
 	savegame.close()
 	return true
 
+# Run a simple command given as a string, blocking, using execute.
 func run(command):
+	print("run: "+command)
 	var output = []
 	OS.execute(command, [], true, output, true)
 	# Remove trailing newline.
 	return output[0].substr(0,len(output[0])-1)
+
+func sh(command, wd="/tmp/"):
+	print("sh in "+wd+": "+command)
+	var cwd = game.run("pwd")
+	var output = []
+	
+	var hacky_command = command
+	hacky_command = "cd '"+wd+"';"+hacky_command
+	hacky_command = "export EDITOR=fake-editor;"+hacky_command
+	hacky_command = "export PATH=\"$PATH\":"+cwd+"/scripts;"+hacky_command
+	OS.execute("/bin/sh", ["-c",  hacky_command], true, output, true)
+	return output[0]
+
+func read_file(path):
+	var file = File.new()
+	file.open(path, File.READ)
+	var content = file.get_as_text()
+	file.close()
+	return content
+
+func write_file(path, content):
+	var file = File.new()
+	file.open(path, File.WRITE)
+	file.store_string(content)
+	file.close()
+	return true

levels/blobs/goal

@@ -0,0 +1,6 @@
+echo "Hi" > file1
+echo "Ho" > file1
+echo "Hu" > file1
+git hash-object -w file1
+git hash-object -w file2
+git hash-object -w file3

levels/first/goal

@@ -0,0 +1 @@
+git commit --allow-empty -m "Emtpy commit"

main.gd

@@ -6,21 +6,63 @@ var server
 var client_connection
 
 func _ready():
-	var level = "first"
-	var goal_repository_path = "goal"
-	var start_repository_path = "start"
-	var active_repository_path = "active"
-	var active_prefix = "/tmp/"
-	var levels_prefix = game.run("pwd")+"/levels/"+level+"/"
-	
-	OS.execute("rm", ["-r", active_prefix+active_repository_path], true)
-	OS.execute("cp", ["-ra", levels_prefix+start_repository_path, active_prefix+active_repository_path], true)
-	$GoalRepository.path = levels_prefix+goal_repository_path
-	$ActiveRepository.path = active_prefix+active_repository_path
+	# Initialize level select.
+	var options = $LevelSelect.get_popup()
+	for level in list_levels():
+		options.add_item(level)
+	options.connect("id_pressed", self, "load_level")
 	
+	# Initialize TCP server for fake editor.
 	server = TCP_Server.new()
 	server.listen(1234)
 	
+func list_levels():
+	var levels = []
+	var dir = Directory.new()
+	dir.open("levels")
+	dir.list_dir_begin()
+
+	while true:
+		var file = dir.get_next()
+		if file == "":
+			break
+		elif not file.begins_with("."):
+			levels.append(file)
+
+	dir.list_dir_end()
+	return levels
+
+func load_level(id):
+	var levels = list_levels()
+	
+	var level = levels[id]
+	var cwd = game.run("pwd")
+	var tmp_prefix = "/tmp/"
+	var level_prefix = cwd+"/levels/"
+	
+	var goal_repository_path = tmp_prefix+"goal/"
+	var active_repository_path = tmp_prefix+"active/"
+	var goal_script = level_prefix+level+"/goal"
+	var active_script = level_prefix+level+"/start"
+	
+	OS.execute("rm", ["-r", active_repository_path], true)
+	OS.execute("rm", ["-r", goal_repository_path], true)
+	construct_repo(goal_script, goal_repository_path)
+	construct_repo(active_script, active_repository_path)
+	
+	$GoalRepository.path = goal_repository_path
+	$ActiveRepository.path = active_repository_path
+	
+func construct_repo(script, path):
+	print(path)
+	game.sh("mkdir "+path)
+	game.sh("git init", path)
+	var commands = game.read_file(script).split("\n")
+	print(commands)
+	for command in commands:
+		print(command)
+		game.sh(command, path)
+	
 func _process(delta):
 	if server.is_connection_available():
 		client_connection = server.take_connection()
@@ -50,23 +92,12 @@ func _process(delta):
 func read_commit_message():
 	$CommitMessage.show()
 	$Terminal/Input.editable = false
-	var file_path = "/tmp/githydragit/.git/COMMIT_EDITMSG"
-	var file = File.new()
-	file.open(file_path, File.READ)
-	var content = file.get_as_text()
-	file.close()
-	$CommitMessage.text = content
+	$CommitMessage.text = game.read_file("/tmp/githydragit/.git/COMMIT_EDITMSG")
 
 func save_commit_message():
-	var file = File.new()
-	var file_path = "/tmp/githydragit/.git/COMMIT_EDITMSG"
-	file.open(file_path, File.WRITE)
-	var content = $CommitMessage.text
-	file.store_string(content)
-	file.close()
+	game.write_file("/tmp/githydragit/.git/COMMIT_EDITMSG", $CommitMessage.text)
 	print("disconnect")
 	client_connection.disconnect_from_host()
 	$Terminal/Input.editable = true
 	$CommitMessage.text = ""
 	$CommitMessage.hide()
-		

main.tscn

@@ -57,5 +57,16 @@ size = Vector2( 500, 1000 )
 [node name="ActiveRepository" parent="." instance=ExtResource( 3 )]
 position = Vector2( 704.399, 17.2594 )
 size = Vector2( 500, 1000 )
+
+[node name="LevelSelect" type="MenuButton" parent="."]
+margin_left = 11.5584
+margin_top = 11.1303
+margin_right = 109.558
+margin_bottom = 31.1303
+text = "Select level..."
+flat = false
+__meta__ = {
+"_edit_use_anchors_": false
+}
 [connection signal="text_entered" from="Terminal/Input" to="Terminal" method="send_command"]
 [connection signal="pressed" from="CommitMessage/Button" to="." method="save_commit_message"]

repository.gd

@@ -10,14 +10,20 @@ func _ready():
 
 func _process(delta):
 	if path:
-		update_head()
-		update_refs()
-		update_index()
-		update_objects()
-		apply_forces()
+		update_everything()
+		
+func update_everything():
+	update_head()
+	update_refs()
+	update_index()
+	update_objects()
+	apply_forces()
 
 func set_path(new_path):
 	path = new_path
+	for o in objects.values():
+		o.queue_free()
+	objects = {}
 	
 func get_path():
 	return path
@@ -126,6 +132,16 @@ func update_head():
 		add_child(n)
 	var n = objects["HEAD"]
 	n.children = {symref_target("HEAD"): ""}
+	if not objects.has(symref_target("HEAD")):
+		var n2 = node.instance()
+		var r = symref_target("HEAD")
+		n2.id = r
+		n2.type = "ref"
+		n2.content = ""
+		n2.repository = self
+		n2.position = random_position()
+		objects[r] = n2
+		add_child(n2)
 
 func all_objects():
 	return git("cat-file --batch-check=%(objectname) --batch-all-objects", true)

terminal.gd

@@ -7,15 +7,8 @@ func send_command(command):
 	thread.start(self, "run_command_in_a_thread", command)
 
 func run_command_in_a_thread(command):
-	var cwd = game.run("pwd")
-	var output = []
-	
-	var hacky_command = command
-	hacky_command = "cd /tmp/githydragit;"+hacky_command
-	hacky_command = "export EDITOR=fake-editor;"+hacky_command
-	hacky_command = "export PATH=\"$PATH\":"+cwd+"/scripts;"+hacky_command
-	OS.execute("/bin/sh", ["-c",  hacky_command], true, output, true)
+	var output = game.sh(command, "/tmp/active")
 	
 	$Input.text = ""
-	$Output.text = $Output.text + "$ " + command + "\n" + output[0]
+	$Output.text = $Output.text + "$ " + command + "\n" + output
 	$Output.scroll_vertical = 999999