feat: example bundler + minifier + brotli compressor script

.gitignore

@@ -21,3 +21,4 @@ bundle*.js
 bundle*.js.zip
 bundle.terserjs.zip
 *.zip
+www

build.mjs

@@ -0,0 +1,85 @@
+import { exec } from "child_process";
+import program from "commander";
+import fs from "fs";
+import glob from "glob";
+import makeDir from "make-dir";
+import path from "path";
+import process from "process";
+
+program
+  .name("build")
+  .option("-r, --rootDir <dirpath>", "the root of the source directory tree")
+  .option("-g, --glob <glob>", "the search within the source directory")
+  .option("-o, --outDir <dirpath>", "the root of the output directory tree")
+  .option("-m, --minify", "minify the code")
+  .option("-c, --compress", "compress the code using brotli")
+  .option("-v, --verboseLevel <level>", "higher numbers means more output", parseInt);
+program.parse(process.argv);
+
+async function asyncCommandLine(commandLine) {
+  return new Promise(function (resolve, reject) {
+    exec(commandLine, (error, stdout, stderr) => {
+      if (error) {
+        return reject(error);
+      }
+      return resolve();
+    });
+  });
+}
+async function bundle(inputFilePath, outputFilePath) {
+  return asyncCommandLine(`yarn rollup ${inputFilePath} --file ${outputFilePath} --format iife --minifyInternalExport`);
+}
+
+async function minify(inputFilePath, outputFilePath) {
+  return asyncCommandLine(
+    `yarn terser --compress --mangle --mangle-props -- ${inputFilePath} --output ${outputFilePath}`,
+  );
+}
+
+async function compress(inputFilePath) {
+  return asyncCommandLine(`brotli ${inputFilePath}`);
+}
+
+async function transpile() {
+  return asyncCommandLine(`yarn tgt ${program.minify ? "--minify" : ""}`);
+}
+
+async function main() {
+  await transpile();
+  const globRegex = `${program.rootDir}/${program.glob}`;
+  glob(globRegex, {}, function (er, sourceFileNames) {
+    sourceFileNames.forEach(async (sourceFileName) => {
+      const sourceDirectory = path.dirname(sourceFileName);
+      const outputDirectory = sourceDirectory.replace(program.rootDir, program.outDir);
+
+      const sourceExtension = path.extname(sourceFileName);
+      const sourceBaseName = path.basename(sourceFileName, sourceExtension);
+      const bundledFileName = `${outputDirectory}/${sourceBaseName}.rollup${sourceExtension}`;
+      const minifiedFileName = `${outputDirectory}/${sourceBaseName}${sourceExtension}`;
+      //const outputFileName = `${outputDirectory}/${sourceBaseName}.${sourceExtension}`;
+      if (!fs.existsSync(outputDirectory)) {
+        makeDir.sync(outputDirectory);
+      }
+      await bundle(sourceFileName, bundledFileName);
+      sourceFileName = bundledFileName;
+      if (program.minify) {
+        await minify(sourceFileName, minifiedFileName);
+        fs.unlinkSync(sourceFileName);
+        sourceFileName = minifiedFileName;
+      } else {
+        fs.renameSync(sourceFileName, minifiedFileName);
+      }
+
+      const compressedFileName = sourceFileName + ".br";
+      if (fs.existsSync(compressedFileName)) {
+        fs.unlinkSync(sourceFileName + ".br");
+      }
+
+      if (program.compress) {
+        await compress(sourceFileName);
+      }
+    });
+  });
+}
+
+main();

package.json

@@ -21,6 +21,7 @@
   },
   "scripts": {
     "build": "tgt & tsc",
+    "build-examples": "node  --experimental-modules build.mjs -g **/index.js -r ./dist -o ./www -m -c -v 0",
     "dev": "npm run watch & npm start",
     "lint": "eslint ./src/",
     "start": "es-dev-server --node-resolve --watch",
@@ -34,12 +35,17 @@
   "devDependencies": {
     "@commitlint/cli": "^8.3.5",
     "@commitlint/config-conventional": "^8.3.4",
+    "@rollup/plugin-multi-entry": "^3.0.1",
     "@semantic-release/changelog": "^5.0.1",
     "@semantic-release/git": "^9.0.0",
     "@semantic-release/release-notes-generator": "^9.0.1",
+    "@types/glob": "^7.1.2",
     "@types/jest": "^26.0.0",
+    "@types/rollup": "^0.54.0",
     "@typescript-eslint/eslint-plugin": "^3.1.0",
     "@typescript-eslint/parser": "^3.1.0",
+    "brotli": "^1.3.2",
+    "commander": "^5.1.0",
     "commitizen": "^4.1.2",
     "cz-conventional-changelog": "^3.2.0",
     "es-dev-server": "^1.53.0",
@@ -49,7 +55,9 @@
     "eslint-plugin-cflint": "^1.0.0",
     "eslint-plugin-import": "^2.20.2",
     "eslint-plugin-prettier": "^3.1.3",
+    "glob": "^7.1.6",
     "jest": "^26.0.1",
+    "make-dir": "^3.1.0",
     "prettier": "^2.0.5",
     "rollup": "^2.18.0",
     "semantic-release": "^17.0.8",