Switching to esbuild (wip)

Author: moonglum

.github/workflows/nodejs.yml

@@ -7,8 +7,9 @@ jobs:
         strategy:
             matrix:
                 node-version:
-                - 10.x
                 - 12.x
+                - 14.x
+                - 16.x
         steps:
         - uses: actions/checkout@v1
         - uses: actions/setup-node@v1

CHANGELOG.md

@@ -2,6 +2,20 @@ faucet-pipeline-js version history
 ==================================
 
 
+v3.0.0
+------
+
+_unreleased_
+
+* Switch from rollup to esbuild
+* Support for TypeScript, JSX and minification built-in (no plugin required)
+* ESM is the default output format
+* `--compact` defaults to minify, mangle remains opt-in
+* Drop support for:
+    * transpilation to pre-ES6 code
+    * UMD, CJS and IIFE output format (only ESM is supported)
+
+
 v2.1.6
 ------
 

lib/bundle.js

@@ -0,0 +1,42 @@
+"use strict";
+
+let esbuild = require("esbuild");
+let { abort } = require("faucet-pipeline-core/lib/util");
+
+module.exports = class Bundle {
+	constructor(entryPoint, target, config) {
+		if(config.format && config.format !== "esm") {
+			abort(`Unsupported format ${config.format}`);
+		}
+
+		this.entryPoints = [entryPoint];
+		this.target = target;
+		this.fingerprint = config.fingerprint;
+		this.compact = config.compact;
+		this.jsx = config.jsx;
+	}
+
+	// TODO: skip if files are not relevant
+	// via: Object.keys(res.metafile.inputs);
+	async compile(filepaths) {
+		let result = esbuild.buildSync({
+			entryPoints: this.entryPoints,
+			bundle: true,
+			format: "esm",
+			write: false,
+			charset: "utf8",
+			metafile: true,
+			minifyWhitespace: !!this.compact,
+			minifyIdentifiers: this.compact === "mangle",
+			outdir: "out",
+			jsxFactory: this.jsx && this.jsx.pragma,
+			jsxFragment: this.jsx && this.jsx.fragment
+		});
+
+		// TODO: write error if error occurred
+		// TODO: outputFiles is an array of all files that would have been written
+		return {
+			code: result.outputFiles[0].text
+		};
+	}
+};