Build system for ue4 projects for Sublime Text 3

build.js

#!/usr/bin/env node

const { spawn } = require('child_process');
const path = require('path');

// Set the paths where your UE4 is located
const UE4Source = {
	Win: 'D:/Work/github/UnrealEngine',
	Mac: '/Users/Shared/Epic Games/UE_4.20'
};

const isWin = /^win/.test(process.platform);
let example = `${isWin ? 'X:' : ''}/Path/To/MyProjectName/MyProjectName.uproject`;

let args = process.argv.slice(2);

if (args.length != 2) {
	process.stdout.write(`Usage example:\n node build.js MyProjectName ${example}\n`);
	return;
}

let project = args[0];
let projectPath = path.resolve(args[1]);
let cwd = process.cwd();

if (!project || project == '--help' || project == '/?' || project == '-h') {
	process.stdout.write(`Usage example:\n node build.js MyProjectName ${example}\n`);
	return;
}

let build;
if (isWin) {
	let cmd_args = [
		'/c',
		'd:', '&', 'cd', `"${cwd}"`,'&',
		path.join(UE4Source.Win, 'Engine/Binaries/DotNET/UnrealBuildTool.exe'),
		'Development',
		'Win64',
		`-Project="${projectPath}"`,
		'-TargetType=Editor',
		'-Progress',
		'-NoHotReloadFromIDE',
	];

	console.log(`build.js command: ${cmd_args.join(' ')}`);

	build = spawn('cmd.exe', cmd_args);
} else /* if (isMac) */ {
	let cmd_args = [
		project,
		'Development',
		'Mac',
		`-project="${projectPath}"`,
		'-editorrecompile',
		'-progress',
		'NoHotReloadFromIDE',
	];

	// TODO: find the reason why this thing is crashing Sublime Text 3 plugin_host process
	build = spawn('Engine/Build/BatchFiles/Mac/Build.sh', cmd_args, {
		cwd: UE4Source.Mac
	});
}

build.stdout.on('data', (data) => {
	process.stdout.write(data);
});

build.stderr.on('data', (data) => {
	process.stderr.write(data);
});

build.on('close', (code) => {
	console.log(`build process exited with code ${code}`);
});

build.sublime-build

{
	"cmd": [
		"node",
		"build.js",
		"ProjectName",
		"D:/Path/To/YourProject/ProjectName.uproject",
	],
	"shell": true,
	"working_dir": "D:/Path/To/YourProject",
	"file_regex": "^(D:[^\\(]+)\\((\\d+)\\)"
}