Build script to help exporting Godot project.

build.gd

tool
extends SceneTree

const PLATFORM_ANDROID = "Android"
const PLATFORM_HTML5 = "HTML5"
const PLATFORM_IOS = "iOS"
const PLATFORM_LINUX = "Linux/X11"
const PLATFORM_MAC = "Mac OSX" 
const PLATFORM_UWP = "UWP"
const PLATFORM_WINDOWS = "Windows Desktop"

const ALL_PLATFORMS = [
	PLATFORM_ANDROID, PLATFORM_HTML5, PLATFORM_IOS, PLATFORM_LINUX, PLATFORM_MAC, PLATFORM_UWP, PLATFORM_WINDOWS
]

var include_platforms = []
var cwd = ProjectSettings.globalize_path("res://")

var _start_time = 0

# Run "godot --no-window -s build.gd" to build. Pass platform names(case-sensitive), otherwise, all preset will be exported.
# Always "export" runnable("Export Project" in editor) and "pack" non-runnable("Export PCK/ZIP" in editor)
# Export will be ignored if "export_path" is not set.
func _initialize():
	var args = OS.get_cmdline_args()
	# Trim unwanted args passed to godot executable
	for arg in Array(args):
		args.remove(0)
		if "build.gd" in arg:
			break

	if args.empty():
		include_platforms = ALL_PLATFORMS.duplicate()
	else:
		include_platforms = []
		for arg in args:
			var platform = platform_alias_to_key(arg)
			if platform:
				include_platforms.append(platform)
	print("Included platforms: ", include_platforms)
	
	_start_time = OS.get_system_time_msecs()
	var export_preset = ConfigFile.new()
	var result = export_preset.load("res://export_presets.cfg")
	if result != OK:
		printerr("Failed to load export_presets.cfg(%d)" % result)
		return

	var sections = []
	# Filter export & Remove {SECTION_NAME}.option
	for section in export_preset.get_sections():
		if "options" in section:
			continue
		
		var name = export_preset.get_value(section, "name", "")
		var platform = export_preset.get_value(section, "platform", null)
		
		var export_path = export_preset.get_value(section, "export_path", null)
		if not name:
			printerr("Nameless export at %s" % section)
			continue
		if not platform:
			printerr("Skip \"%s\", undefined platform" % name)
			continue
		if not (platform in include_platforms):
			# print("Skip %s from %s" % [name, platform])
			continue
		if not export_path:
			printerr("Skip \"%s\", undefined export_path" % name)
			continue
		sections.append(section)
	print("%d export found:" % sections.size())
	for section in sections:
		var name = export_preset.get_value(section, "name", "")
		var runnable = export_preset.get_value(section, "runnable", false)
		print("- %s %s" % [name, "(Runnable)" if runnable else ""])
	print("\n")

	for section in sections:
		var name = export_preset.get_value(section, "name", null)
		var runnable = export_preset.get_value(section, "runnable", false)
		var export_path = export_preset.get_value(section, "export_path", null)
		
		var cmd
		if runnable:
			cmd = "godot --no-window --quiet --export-debug \"%s\"" % name
			print("Exporting %s..." % name)
		else:
			cmd = "godot --no-window --quiet --export-pack \"%s\"" % name
			print("Packing %s..." % name)
		result = execute(cmd)
		if result == OK:
			if runnable:
				print("Successfully export %s to: \n- %s" % [name, export_path])
			else:
				print("Successfully packed %s to: \n- %s" % [name, export_path])
		else:
			print("Failed to export %s (%d)" % [name, result])
		print("\n")

	print("Finished, elapsed %.3fs" % ((OS.get_system_time_msecs() - _start_time) / 1000.0))
	quit()

func execute(command, blocking=true, output=[], read_stderr=false):
	var cmd = "cd %s && %s" % [cwd, command]
	# NOTE: OS.execute() seems to ignore read_stderr
	var exit = FAILED
	match OS.get_name():
		"Windows":
			cmd = cmd if read_stderr else "%s 2> nul" % cmd
			# print("Execute \"%s\"" % cmd)
			exit = OS.execute("cmd", ["/C", cmd], blocking, output, read_stderr)
		"X11", "OSX", "Server":
			cmd = cmd if read_stderr else "%s 2>/dev/null" % cmd
			# print("Execute \"%s\"" % cmd)
			exit = OS.execute("bash", ["-c", cmd], blocking, output, read_stderr)
		var unhandled_os:
			printerr("Unexpected OS: %s" % unhandled_os)
	# print("Execution ended(code:%d): %s" % [exit, output])
	return exit			

func platform_alias_to_key(v):
	match v:
		PLATFORM_ANDROID, "android":
			return PLATFORM_ANDROID
		PLATFORM_HTML5, "html", "html5":
			return PLATFORM_HTML5
		PLATFORM_IOS, "ios":
			return PLATFORM_IOS
		PLATFORM_LINUX, "linux", "x11":
			return PLATFORM_LINUX
		PLATFORM_MAC, "mac":
			return PLATFORM_MAC
		PLATFORM_UWP, "uwp":
			return PLATFORM_UWP
		PLATFORM_WINDOWS, "window", "windows":
			return PLATFORM_WINDOWS

Build script to help exporting Godot project. Run godot --no-window -s build.gd to build.
Filter export by passing platform name as argument, for example, godot --no-window -s build.gd windows

Always "export" runnable("Export Project" in editor) and "pack" non-runnable("Export PCK/ZIP" in editor).
Export will be ignored if export_path is not set.