compile_project.js

const EventEmitter = require('events');
const fs = require("fs");
const path = require("path");
const spawn = require("child_process").spawn;
const jsonc = require("jsonc-parser");

const
{
	printQuotation,
	printErr,
	printOk,
	printWarning,
	tr
} = require("./print.js");

/**
 * 编译LayaAir项目。
 * 利用位于项目目录中的 .laya/tasks.json 中提供的参数调用编译器。
 * 目前并非支持完整的 tasks.json
 */
class LayaProjectCompiler extends EventEmitter
{
	constructor(project_dir)
	{
		super();
		if (project_dir)
			this.compile(project_dir);
	}

	compile(project_dir)
	{
		this.project_dir = project_dir;

		let tasksFile = path.resolve(".laya", "tasks.json");
		if (!fs.existsSync(tasksFile))
		{
			console.log(tr("no tasks.json, skip compile.").green);
			this.emit("success");
			return;
		}

		// 读取和解析 tasks.json
		let tasksFileInString = fs.readFileSync(tasksFile).toString();
		let errors = [];
		let tasks = jsonc.parse(tasksFileInString, errors);
		if (errors.length)
		{
			errors.forEach((e) => console.error(e));
		}
		else
		{
			// windows调用tsc必须是tsc.cmd
			if (fs.existsSync(path.join(project_dir, "tsconfig.json")) &&
				process.platform == "win32")
			{
				tasks.command = tasks.command.replace(/\btsc\b/, "tsc.cmd");
			}

			// 替换${workspaceRoot}变量为其值
			let command = tasks.command.replace("${workspaceRoot}", process.cwd());
			let args = tasks.args.map((arg) => arg = arg.replace("${workspaceRoot}", process.cwd()));

			let fullCommand = tasks.command;

			// 打印命令
			tasks.args.forEach((arg) => fullCommand += " " + arg);
			console.log(fullCommand.yellow);

			let sp = spawn(command, args);
			sp.stdout.on("data", this.emitStdout.bind(this));
			sp.stderr.on("data", this.emitStderr.bind(this));
			sp.on("close", (data) =>
			{
				if (data == 0)
				{
					if (fs.existsSync(path.join(project_dir, "tsconfig.json")))
						this.tsSortScript();

					printOk(tr("Compile completed."));
					this.emit("success");
				}
				else
				{
					this.emit("failed");
				}
			});
		}
	}

	emitStdout(data)
	{
		this.emit("stdout", data);
	}

	emitStderr(data)
	{
		this.emit("stderr", data);
	}

	tsSortScript()
	{
		require("./tools/tsSort.js").htmlHandlerScript(
		{
			workspacePath: this.project_dir
		});
	}
}

exports.LayaProjectCompiler = LayaProjectCompiler;