Rename scripts folder to js-build

js-build/babel-worker.js

@@ -0,0 +1,94 @@
+/* global onmessage: true, postMessage: false */
+'use strict';
+
+const fs = require('fs-extra');
+const path = require('path');
+const babel = require('@babel/core');
+const multimatch = require('multimatch');
+const options = JSON.parse(fs.readFileSync('.babelrc'));
+const cluster = require('cluster');
+const { comparePaths } = require('./utils');
+
+/* exported onmessage */
+async function babelWorker(ev) {
+	const t1 = Date.now();
+	const sourcefile = ev.file;
+	const localOptions = {
+		filename: sourcefile
+	};
+	const outfile = path.join('build', sourcefile.replace('.jsx', '.js'));
+	const postError = (error) => {
+		process.send({
+			sourcefile,
+			outfile,
+			error
+		});
+	};
+
+	var isSkipped = false;
+	var transformed;
+
+	try {
+		let contents = await fs.readFile(sourcefile, 'utf8');
+		// Patch react
+		if (comparePaths(sourcefile, 'resource/react.js')) {
+			transformed = contents.replace('instanceof Error', '.constructor.name == "Error"')
+		}
+		// Patch react-dom
+		else if (comparePaths(sourcefile, 'resource/react-dom.js')) {
+			transformed = contents.replace(/ ownerDocument\.createElement\((.*?)\)/gi, 'ownerDocument.createElementNS(HTML_NAMESPACE, $1)')
+				.replace('element instanceof win.HTMLIFrameElement',
+					'typeof element != "undefined" && element.tagName.toLowerCase() == "iframe"')
+				.replace("isInputEventSupported = false", 'isInputEventSupported = true');
+		}
+		// Patch react-virtualized
+		else if (comparePaths(sourcefile, 'resource/react-virtualized.js')) {
+			transformed = contents.replace('scrollDiv = document.createElement("div")', 'scrollDiv = document.createElementNS("http://www.w3.org/1999/xhtml", "div")')
+				.replace('document.body.appendChild(scrollDiv)', 'document.documentElement.appendChild(scrollDiv)')
+				.replace('document.body.removeChild(scrollDiv)', 'document.documentElement.removeChild(scrollDiv)');
+		}
+		// Patch single-file
+		else if (sourcefile === 'resource/SingleFile/lib/single-file.js') {
+			// Change for what I assume is a bug in Firefox. We create a singlefile
+			// sandbox which is based on a document.defaultView of a hidden browser.
+			// The minified single-file then uses globalThis.Set which for some reason
+			// doesn't properly support iterating over and throws an error. The normal
+			// `Set` object accessible in the sandbox does not have this problem.
+			// I've tried using a proxy for globalThis with a custom Set, but that
+			// manifest its own issues. Setting the globalThis to sandbox produced
+			// issues with monkey-patching that singleFile does for default interfaces.
+			transformed = contents.replace('globalThis.Set', 'Set')
+				.replace('globalThis.Map', 'Map');
+		}
+
+		else if ('ignore' in options && options.ignore.some(ignoreGlob => multimatch(sourcefile, ignoreGlob).length)) {
+			transformed = contents;
+			isSkipped = true;
+		} else {
+			try {
+				({ code: transformed } = await babel.transformAsync(
+					contents,
+					Object.assign(
+						localOptions,
+						options
+					)
+				));
+			} catch (error) { return postError(`Babel error: ${error}`);}
+		}
+
+		await fs.outputFile(outfile, transformed);
+		const t2 = Date.now();
+		process.send({
+			isSkipped,
+			sourcefile,
+			outfile,
+			processingTime: t2 - t1
+		});
+	} catch (error) { return postError(`I/O error: ${error}`); }
+}
+
+module.exports = babelWorker;
+
+if (cluster.isWorker) {
+	process.on('message', babelWorker);
+}