mirror of https://github.com/webpack/webpack.git
95 lines
2.5 KiB
JavaScript
95 lines
2.5 KiB
JavaScript
const path = require("path");
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const fs = require("fs");
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const terser = require("terser");
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const prettier = require("prettier");
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// When --write is set, files will be written in place
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// Otherwise it only prints outdated files
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const doWrite = process.argv.includes("--write");
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const files = ["lib/util/semver.js"];
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(async () => {
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for (const file of files) {
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const filePath = path.resolve(__dirname, "..", file);
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const content = fs.readFileSync(filePath, "utf-8");
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const exports = require(`../${file}`);
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const regexp =
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/\n\/\/#region runtime code: (.+)\n[\s\S]+?\/\/#endregion\n/g;
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const replaces = new Map();
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let match = regexp.exec(content);
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while (match) {
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const [fullMatch, name] = match;
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const originalCode = exports[name].toString();
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const header =
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/** @type {RegExpExecArray} */
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(/^\(?([^=)]+)\)?\s=> \{/.exec(originalCode));
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const body = originalCode.slice(header[0].length, -1);
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const result = await terser.minify(
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{
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["input.js"]: body
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},
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{
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compress: true,
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mangle: true,
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ecma: 5,
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toplevel: true,
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parse: {
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bare_returns: true
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}
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}
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);
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if (!result.code) {
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throw new Error(`No code generated for ${name} in ${file}`);
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}
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const args = header[1];
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if (/`|const|let|=>|\.\.\./.test(result.code)) {
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throw new Error(`Code Style of ${name} in ${file} is too high`);
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}
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let templateLiteral = false;
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const code = result.code
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.replace(/\\/g, "\\\\")
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.replace(/'/g, "\\'")
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.replace(/function\(([^)]+)\)/g, (m, args) => {
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templateLiteral = true;
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return `\${runtimeTemplate.supportsArrowFunction() ? '${
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args.includes(",") ? `(${args})` : args
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}=>' : 'function(${args})'}`;
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});
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replaces.set(
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fullMatch,
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`
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//#region runtime code: ${name}
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exports.${name}RuntimeCode = runtimeTemplate => \`var ${name} = \${runtimeTemplate.basicFunction("${args}", [
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"// see webpack/${file} for original code",
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${templateLiteral ? `\`${code}\`` : `'${code}'`}
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])}\`;
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//#endregion
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`
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);
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match = regexp.exec(content);
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}
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const prettierConfig = await prettier.resolveConfig(filePath);
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const newContent = await prettier.format(
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content.replace(regexp, match => replaces.get(match)),
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{ filepath: filePath, ...prettierConfig }
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);
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if (newContent !== content) {
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if (doWrite) {
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fs.writeFileSync(filePath, newContent, "utf-8");
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console.error(`${file} updated`);
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} else {
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console.error(`${file} need to be updated`);
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process.exitCode = 1;
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}
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}
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}
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})();
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