chore: use esbuild to reduce the size of the action (#1334)

action-src/build.mjs

@@ -0,0 +1,20 @@
+#!/usr/bin/env node
+/* eslint-disable node/no-unpublished-import */
+
+import * as esbuild from 'esbuild';
+import { fileURLToPath } from 'url';
+
+const __dirname = fileURLToPath(new URL('.', import.meta.url));
+
+async function buildAll() {
+    // Note: cjs is the only possible option at this moment.
+    await esbuild.build({
+        absWorkingDir: __dirname,
+        entryPoints: ['src/main_root.ts'],
+        bundle: true,
+        platform: 'node',
+        outfile: '../action/lib/main_root.js',
+    });
+}
+
+buildAll();

action-src/cspell.json

@@ -11,5 +11,8 @@
     "ignoreWords": [
         "EDITMSG",
         "pollyjs"
+    ],
+    "words": [
+        "outfile"
     ]
 }

action-src/package.json

@@ -3,18 +3,19 @@
   "version": "0.0.0",
   "private": true,
   "scripts": {
-    "build": "yarn compile",
-    "compile": "tsc -p .",
+    "build": "node ./build.mjs",
     "clean-build": "yarn clean && yarn build",
-    "clean": "shx rm -rf ../action/lib",
+    "clean": "shx rm -rf ../action/lib dist",
     "eslint": "eslint 'action-source/**/*.ts'",
     "prettier": "prettier -w \"**/*.{md,yaml,yml,json,ts}\"",
     "prepublishOnly": "yarn build",
     "smoke-test-push": "env-cmd -f ./fixtures/push.json node ./action/lib/main_root.js",
     "smoke-test": "env-cmd -f ./fixtures/pull_request.json node ./action/lib/main_root.js",
-    "watch": "tsc -p . --watch",
     "test": "jest"
   },
+  "bin": {
+    "build": "./build.mjs"
+  },
   "workspaces": {
     "nohoist": [
       "**"
@@ -28,6 +29,7 @@
     "@octokit/rest": "^19.0.13",
     "cspell": "^6.31.3",
     "cspell-glob": "^6.31.3",
+    "esbuild": "^0.19.2",
     "vscode-uri": "^3.0.7"
   }
 }

action-src/tsconfig.json

@@ -6,7 +6,7 @@
         "noUnusedParameters": true,
         "noUnusedLocals": true,
         "moduleResolution": "node",
-        "outDir": "../action/lib",
+        "outDir": "dist",
         "rootDir": "./src"
     },
     "include": ["src/**/*"],