add cli commands

package.json

@@ -31,7 +31,7 @@
   "license": "MIT",
   "main": "bin/index.js",
   "bin": {
-    "buttler": "./bin/index.js"
+    "buttler": "./bin/cli.js"
   },
   "files": [
     "bin/"
@@ -48,6 +48,7 @@
   },
   "dependencies": {
     "@figma/nodegit": "^0.28.0-figma.6",
+    "commander": "^12.1.0",
     "dockerode": "^4.0.2",
     "dotenv": "^16.4.5",
     "express": "^4.19.2",

src/cli.ts

@@ -0,0 +1,66 @@
+#!/usr/bin/env node
+import { spawn } from "node:child_process";
+import fs from "node:fs/promises";
+import { dirname, resolve } from "node:path";
+import { fileURLToPath } from "node:url";
+import { Command } from "commander";
+
+const program = new Command();
+
+async function checkFile(filePath: string) {
+  try {
+    await fs.access(filePath);
+    return true;
+  } catch {
+    return false;
+  }
+}
+
+function spawnChildProcess(detached: boolean) {
+  const __filename = fileURLToPath(import.meta.url);
+  const __dirname = dirname(__filename);
+  const appPath = resolve(__dirname, "index.js");
+  const child = spawn("node", [appPath], {
+    detached,
+    stdio: detached ? "ignore" : "inherit",
+    env: {
+      PORT: "2083",
+    },
+  });
+  if (detached) child.unref();
+  return child.pid;
+}
+
+program.command("start").description("starts the application").action(async () => {
+  const pidFilePath = resolve(process.cwd(), "PID");
+  const exists = await checkFile(pidFilePath);
+  if (exists) {
+    return console.warn("the application is already running");
+  }
+  const pid = spawnChildProcess(true);
+  await fs.writeFile(pidFilePath, `${pid}`, "utf8");
+  console.log("the application has started");
+});
+
+program.command("stop").description("stops the application").action(async () => {
+  const pidFilePath = resolve(process.cwd(), "PID");
+  const exists = await checkFile(pidFilePath);
+  if (!exists) {
+    return console.warn("the application was not running");
+  }
+  const content = await fs.readFile(pidFilePath, "utf-8");
+  const pid = parseInt(content);
+  if (isNaN(pid)) {
+    return console.error("Invalid PID");
+  }
+  try {
+    process.kill(pid);
+    console.log("the application is stopped");
+  } catch {
+    console.warn("the application was crashed");
+  } finally {
+    await fs.unlink(pidFilePath);
+  }
+});
+
+program.parse(process.argv);

src/index.ts

@@ -1,4 +1,3 @@
-#!/usr/bin/env node
 import http from "node:http";
 import readline from "node:readline";
 import dotenv from "dotenv";