2020-04-30 19:52:54 +08:00
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import * as cp from "child_process"
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import Bundler from "parcel-bundler"
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import * as path from "path"
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async function main(): Promise<void> {
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try {
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const watcher = new Watcher()
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await watcher.watch()
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} catch (error) {
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console.error(error.message)
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process.exit(1)
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}
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}
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class Watcher {
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private readonly rootPath = path.resolve(__dirname, "../..")
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private readonly vscodeSourcePath = path.join(this.rootPath, "lib/vscode")
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private static log(message: string, skipNewline = false): void {
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process.stdout.write(message)
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if (!skipNewline) {
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process.stdout.write("\n")
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}
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}
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public async watch(): Promise<void> {
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let server: cp.ChildProcess | undefined
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const restartServer = (): void => {
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if (server) {
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server.kill()
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}
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const s = cp.fork(path.join(this.rootPath, "out/node/entry.js"), process.argv.slice(2))
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console.log(`[server] spawned process ${s.pid}`)
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s.on("exit", () => console.log(`[server] process ${s.pid} exited`))
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server = s
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}
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const vscode = cp.spawn("yarn", ["watch"], { cwd: this.vscodeSourcePath })
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const tsc = cp.spawn("tsc", ["--watch", "--pretty", "--preserveWatchOutput"], { cwd: this.rootPath })
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2020-08-01 05:27:32 +08:00
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const plugin = cp.spawn("yarn", ["build", "--watch"], { cwd: process.env.PLUGIN_DIR })
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2020-04-30 19:52:54 +08:00
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const bundler = this.createBundler()
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const cleanup = (code?: number | null): void => {
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Watcher.log("killing vs code watcher")
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vscode.removeAllListeners()
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vscode.kill()
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Watcher.log("killing tsc")
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tsc.removeAllListeners()
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tsc.kill()
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2020-08-01 05:27:32 +08:00
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Watcher.log("killing plugin")
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plugin.removeAllListeners()
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plugin.kill()
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2020-04-30 19:52:54 +08:00
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if (server) {
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Watcher.log("killing server")
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server.removeAllListeners()
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server.kill()
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}
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Watcher.log("killing bundler")
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process.exit(code || 0)
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}
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process.on("SIGINT", () => cleanup())
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process.on("SIGTERM", () => cleanup())
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vscode.on("exit", (code) => {
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Watcher.log("vs code watcher terminated unexpectedly")
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cleanup(code)
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})
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tsc.on("exit", (code) => {
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Watcher.log("tsc terminated unexpectedly")
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cleanup(code)
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})
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2020-08-01 05:27:32 +08:00
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plugin.on("exit", (code) => {
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Watcher.log("plugin terminated unexpectedly")
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cleanup(code)
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})
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2020-04-30 19:52:54 +08:00
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const bundle = bundler.bundle().catch(() => {
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Watcher.log("parcel watcher terminated unexpectedly")
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cleanup(1)
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})
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bundler.on("buildEnd", () => {
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console.log("[parcel] bundled")
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})
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bundler.on("buildError", (error) => {
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console.error("[parcel]", error)
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})
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vscode.stderr.on("data", (d) => process.stderr.write(d))
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tsc.stderr.on("data", (d) => process.stderr.write(d))
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2020-08-01 05:27:32 +08:00
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plugin.stderr.on("data", (d) => process.stderr.write(d))
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2020-04-30 19:52:54 +08:00
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// From https://github.com/chalk/ansi-regex
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const pattern = [
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"[\\u001B\\u009B][[\\]()#;?]*(?:(?:(?:[a-zA-Z\\d]*(?:;[-a-zA-Z\\d\\/#&.:=?%@~_]*)*)?\\u0007)",
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"(?:(?:\\d{1,4}(?:;\\d{0,4})*)?[\\dA-PR-TZcf-ntqry=><~]))",
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].join("|")
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const re = new RegExp(pattern, "g")
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/**
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* Split stdout on newlines and strip ANSI codes.
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*/
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const onLine = (proc: cp.ChildProcess, callback: (strippedLine: string, originalLine: string) => void): void => {
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let buffer = ""
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if (!proc.stdout) {
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throw new Error("no stdout")
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}
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proc.stdout.setEncoding("utf8")
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proc.stdout.on("data", (d) => {
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const data = buffer + d
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const split = data.split("\n")
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const last = split.length - 1
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for (let i = 0; i < last; ++i) {
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callback(split[i].replace(re, ""), split[i])
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}
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// The last item will either be an empty string (the data ended with a
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// newline) or a partial line (did not end with a newline) and we must
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// wait to parse it until we get a full line.
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buffer = split[last]
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})
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}
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let startingVscode = false
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let startedVscode = false
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onLine(vscode, (line, original) => {
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console.log("[vscode]", original)
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// Wait for watch-client since "Finished compilation" will appear multiple
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// times before the client starts building.
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if (!startingVscode && line.includes("Starting watch-client")) {
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startingVscode = true
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} else if (startingVscode && line.includes("Finished compilation")) {
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if (startedVscode) {
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bundle.then(restartServer)
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}
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startedVscode = true
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}
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})
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onLine(tsc, (line, original) => {
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// tsc outputs blank lines; skip them.
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if (line !== "") {
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console.log("[tsc]", original)
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}
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if (line.includes("Watching for file changes")) {
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bundle.then(restartServer)
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}
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})
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2020-08-01 05:27:32 +08:00
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onLine(plugin, (line, original) => {
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// tsc outputs blank lines; skip them.
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if (line !== "") {
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console.log("[plugin]", original)
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}
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if (line.includes("Watching for file changes")) {
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bundle.then(restartServer)
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}
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})
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2020-04-30 19:52:54 +08:00
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}
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private createBundler(out = "dist"): Bundler {
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return new Bundler(
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2020-08-05 04:03:11 +08:00
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[
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path.join(this.rootPath, "src/browser/register.ts"),
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path.join(this.rootPath, "src/browser/serviceWorker.ts"),
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2020-08-05 04:03:22 +08:00
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path.join(this.rootPath, "src/browser/pages/login.ts"),
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path.join(this.rootPath, "src/browser/pages/vscode.ts"),
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2020-08-05 04:03:11 +08:00
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],
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2020-04-30 19:52:54 +08:00
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{
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outDir: path.join(this.rootPath, out),
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cacheDir: path.join(this.rootPath, ".cache"),
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minify: !!process.env.MINIFY,
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logLevel: 1,
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2020-07-30 04:02:14 +08:00
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publicUrl: ".",
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2020-04-30 19:52:54 +08:00
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},
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)
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}
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}
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main()
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