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Gulpfile.mjs
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Gulpfile.mjs
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import path from "path";
import fs from "fs";
import { cpus } from "os";
import { createRequire } from "module";
import { fileURLToPath } from "url";
import plumber from "gulp-plumber";
import through from "through2";
import chalk from "chalk";
import filter from "gulp-filter";
import gulp from "gulp";
import { rollup } from "rollup";
import {
babel as rollupBabel,
getBabelOutputPlugin,
} from "@rollup/plugin-babel";
import rollupCommonJs from "@rollup/plugin-commonjs";
import rollupJson from "@rollup/plugin-json";
import rollupPolyfillNode from "rollup-plugin-polyfill-node";
import rollupNodeResolve from "@rollup/plugin-node-resolve";
import rollupReplace from "@rollup/plugin-replace";
import rollupTerser from "@rollup/plugin-terser";
import rollupDts from "rollup-plugin-dts";
import rollupDts5 from "rollup-plugin-dts-5";
import { Worker as JestWorker } from "jest-worker";
import { Glob } from "glob";
import { resolve as importMetaResolve } from "import-meta-resolve";
import rollupBabelSource from "./scripts/rollup-plugin-babel-source.js";
import rollupStandaloneInternals from "./scripts/rollup-plugin-standalone-internals.js";
import rollupDependencyCondition from "./scripts/rollup-plugin-dependency-condition.js";
import formatCode from "./scripts/utils/formatCode.js";
import { log } from "./scripts/utils/logger.cjs";
import { USE_ESM, commonJS } from "$repo-utils";
const { require, __dirname: monorepoRoot } = commonJS(import.meta.url);
const defaultPackagesGlob = "./@(codemods|packages|eslint)/*";
const defaultSourcesGlob = `${defaultPackagesGlob}/src/**/{*.js,*.cjs,!(*.d).ts}`;
const babelStandalonePluginConfigGlob =
"./packages/babel-standalone/scripts/pluginConfig.json";
const buildTypingsWatchGlob = [
"./packages/babel-types/lib/definitions/**/*.js",
"./packages/babel-types/scripts/generators/*.js",
];
// env vars from the cli are always strings, so !!ENV_VAR returns true for "false"
function bool(value) {
return value && value !== "false" && value !== "0";
}
/**
* map source code path to the generated artifacts path
* @example
* mapSrcToLib("packages/babel-core/src/index.js")
* // returns "packages/babel-core/lib/index.js"
* @example
* mapSrcToLib("packages/babel-template/src/index.ts")
* // returns "packages/babel-template/lib/index.js"
* @example
* mapSrcToLib("packages/babel-template/src/index.d.ts")
* // returns "packages/babel-template/lib/index.d.ts"
* @param {string} srcPath
* @returns {string}
*/
function mapSrcToLib(srcPath) {
const parts = srcPath.replace(/(?<!\.d)\.ts$/, ".js").split("/");
parts[2] = "lib";
return parts.join("/");
}
function mapToDts(packageName) {
return packageName.replace(
/(?<=\\|\/|^)(packages|eslint|codemods)(?=\\|\/)/,
"dts/$1"
);
}
function getIndexFromPackage(name) {
try {
fs.statSync(`./${name}/src/index.ts`);
return `${name}/src/index.ts`;
} catch {
return `${name}/src/index.js`;
}
}
function errorsLogger() {
return plumber({
errorHandler(err) {
log(err.stack);
},
});
}
function rename(fn) {
return through.obj(function (file, enc, callback) {
file.path = fn(file);
callback(null, file);
});
}
/**
* @param {string} generator
* @param {string} pkg
* @param {string} filename
* @param {string} message
*/
function generateHelpers(generator, dest, filename, message) {
const stream = gulp
.src(".", { base: monorepoRoot })
.pipe(errorsLogger())
.pipe(
through.obj(async (file, enc, callback) => {
const { default: generateCode } = await import(generator);
file.path = filename;
file.contents = Buffer.from(
await formatCode(await generateCode(filename), dest + file.path)
);
log(`${chalk.green("✔")} Generated ${message}`);
callback(null, file);
})
)
.pipe(gulp.dest(dest, { mode: 0o644 }));
return finish(stream);
}
/**
*
* @typedef {("asserts" | "builders" | "constants" | "validators")} TypesHelperKind
* @param {TypesHelperKind} helperKind
* @param {string} filename
*/
async function generateTypeHelpers(helperKind, filename = "index.ts") {
return generateHelpers(
`./packages/babel-types/scripts/generators/${helperKind}.js`,
`./packages/babel-types/src/${helperKind}/generated/`,
filename,
`@babel/types -> ${helperKind}`
);
}
/**
*
* @typedef {("asserts" | "validators")} TraverseHelperKind
* @param {TraverseHelperKind} helperKind
*/
function generateTraverseHelpers(helperKind) {
return generateHelpers(
`./packages/babel-traverse/scripts/generators/${helperKind}.js`,
`./packages/babel-traverse/src/path/generated/`,
`${helperKind}.d.ts`,
`@babel/traverse -> ${helperKind}`
);
}
async function generateRuntimeHelpers() {
await generateHelpers(
`./packages/babel-helpers/scripts/generate-regenerator-runtime.js`,
`./packages/babel-helpers/src/helpers`,
"regeneratorRuntime.js",
"@babel/helpers -> regeneratorRuntime"
);
return generateHelpers(
`./packages/babel-helpers/scripts/generate-helpers.js`,
`./packages/babel-helpers/src/`,
"helpers-generated.ts",
"@babel/helpers"
);
}
const kebabToCamel = str => str.replace(/-[a-z]/g, c => c[1].toUpperCase());
function generateStandalone() {
const dest = "./packages/babel-standalone/src/generated/";
return gulp
.src(babelStandalonePluginConfigGlob, { base: monorepoRoot })
.pipe(
through.obj(async (file, enc, callback) => {
log("Generating @babel/standalone files");
const pluginConfig = JSON.parse(file.contents);
let imports = `import makeNoopPlugin from "../make-noop-plugin.ts";`;
let exportDecls = "";
let exportsList = "";
let allList = "";
for (const plugin of pluginConfig.noopPlugins) {
const camelPlugin = kebabToCamel(plugin);
exportDecls += `${camelPlugin} = makeNoopPlugin(),`;
allList += `"${plugin}": ${camelPlugin},`;
}
for (const plugin of pluginConfig.externalPlugins) {
const camelPlugin = kebabToCamel(plugin);
imports += `import ${camelPlugin} from "@babel/plugin-${plugin}";`;
exportsList += `${camelPlugin},`;
allList += `"${plugin}": ${camelPlugin},`;
}
const fileContents = `/*
* This file is auto-generated! Do not modify it directly.
* To re-generate run 'yarn gulp generate-standalone'
*/
${imports}
export const ${exportDecls.slice(0, -1)};
export {${exportsList}};
export const all: { [k: string]: any } = {${allList}};`;
file.path = "plugins.ts";
file.contents = Buffer.from(
await formatCode(fileContents, dest + file.path)
);
callback(null, file);
})
)
.pipe(gulp.dest(dest));
}
function finish(stream) {
return new Promise((resolve, reject) => {
stream.on("end", resolve);
stream.on("finish", resolve);
stream.on("error", reject);
});
}
function getFiles(glob, { include, exclude }) {
let stream = gulp.src(glob, { base: monorepoRoot });
if (exclude) {
const filters = exclude.map(p => `!**/${p}/**`);
filters.unshift("**");
stream = stream.pipe(filter(filters));
}
if (include) {
const filters = include.map(p => `**/${p}/**`);
stream = stream.pipe(filter(filters));
}
return stream;
}
function createWorker(useWorker) {
const numWorkers = Math.ceil(Math.max(cpus().length, 1) / 2) - 1;
if (
numWorkers === 0 ||
!useWorker ||
// For some reason, on CircleCI the workers hang indefinitely.
process.env.CIRCLECI
) {
return require("./babel-worker.cjs");
}
const worker = new JestWorker(require.resolve("./babel-worker.cjs"), {
numWorkers,
exposedMethods: ["transform"],
});
worker.getStdout().pipe(process.stdout);
worker.getStderr().pipe(process.stderr);
return worker;
}
async function buildBabel(useWorker, ignore = []) {
const worker = createWorker(useWorker);
const files = new Glob(defaultSourcesGlob, {
ignore: ignore.map(p => `${p.src}/**`),
posix: true,
});
const promises = [];
for await (const file of files) {
// @example ./packages/babel-parser/src/index.js
const dest = "./" + mapSrcToLib(file);
promises.push(
worker.transform(file, dest, {
sourceMaps: !file.endsWith(".d.ts"),
})
);
}
return Promise.allSettled(promises)
.then(results => {
results.forEach(result => {
if (result.status == "rejected") {
if (process.env.WATCH_SKIP_BUILD) {
console.error(result.reason);
} else {
throw result.reason;
}
}
});
})
.finally(() => {
worker.end?.();
});
}
/**
* Resolve a nested dependency starting from the given file
*/
function resolveChain(baseUrl, ...packages) {
const require = createRequire(baseUrl);
return packages.reduce(
(base, pkg) =>
path.dirname(require.resolve(pkg + "/package.json", { paths: [base] })),
path.dirname(fileURLToPath(baseUrl))
);
}
// If this build is part of a pull request, include the pull request number in
// the version number.
let versionSuffix = "";
if (process.env.CIRCLE_PR_NUMBER) {
versionSuffix = "+pr." + process.env.CIRCLE_PR_NUMBER;
}
const babelVersion =
require("./packages/babel-core/package.json").version + versionSuffix;
function buildRollup(packages, buildStandalone) {
const sourcemap = process.env.NODE_ENV === "production";
return Promise.all(
packages.map(
async ({
src,
format,
input,
dest,
name,
filename,
envName = "rollup",
}) => {
const pkgJSON = require("./" + src + "/package.json");
const version = pkgJSON.version + versionSuffix;
const { dependencies = {}, peerDependencies = {} } = pkgJSON;
const external = [
...Object.keys(dependencies),
...Object.keys(peerDependencies),
// @babel/compat-data sub exports
/@babel\/compat-data\/.*/,
// Ideally they should be constructed from package.json exports
// required by modules-commonjs
/babel-plugin-dynamic-import-node\/utils/,
// required by preset-env
/@babel\/preset-modules\/.*/,
];
log(`Compiling '${chalk.cyan(input)}' with rollup ...`);
const bundle = await rollup({
input,
external: buildStandalone ? [] : external,
// all node modules are resolved as if they were placed in the n_m folder of package root
preserveSymlinks: true,
onwarn(warning, warn) {
switch (warning.code) {
case "CIRCULAR_DEPENDENCY":
case "SOURCEMAP_ERROR": // Rollup warns about the babel-polyfills source maps
return;
case "UNUSED_EXTERNAL_IMPORT":
warn(warning);
return;
case "MISSING_EXPORT":
// Rollup warns about using babel.default at
// https://github.com/babel/babel-polyfills/blob/4ac92be5b70b13e3d8a34614d8ecd900eb3f40e4/packages/babel-helper-define-polyfill-provider/src/types.js#L5
// We can safely ignore this warning, and let Rollup replace it with undefined.
if (
warning.exporter
.replace(/\\/g, "/")
.endsWith("packages/babel-core/src/index.ts") &&
warning.binding === "default" &&
[
"@babel/helper-define-polyfill-provider",
"babel-plugin-polyfill-corejs2",
"babel-plugin-polyfill-corejs3",
"babel-plugin-polyfill-regenerator",
].some(pkg => warning.id.replace(/\\/g, "/").includes(pkg))
) {
return;
}
}
// We use console.warn here since it prints more info than just "warn",
// in case we want to stop throwing for a specific message.
console.warn(warning);
// https://github.com/babel/babel/pull/12011#discussion_r540434534
throw new Error("Rollup aborted due to warnings above");
},
plugins: [
buildStandalone && rollupStandaloneInternals(),
rollupBabelSource(),
process.env.STRIP_BABEL_8_FLAG &&
rollupDependencyCondition(!!bool(process.env.BABEL_8_BREAKING)),
rollupReplace({
preventAssignment: true,
values: {
"process.env.NODE_ENV": JSON.stringify(process.env.NODE_ENV),
BABEL_VERSION: JSON.stringify(babelVersion),
VERSION: JSON.stringify(version),
},
}),
rollupCommonJs({
include: [
// Bundle node_modules only when building standalone
buildStandalone ? /node_modules/ : "./node_modules/*/*.js",
"packages/babel-runtime/regenerator/**",
"packages/babel-runtime/helpers/*.js",
"packages/babel-preset-env/data/*.js",
// Rollup doesn't read export maps, so it loads the cjs fallback
"packages/babel-compat-data/*.js",
// Used by @babel/standalone
"packages/babel-compat-data/scripts/data/legacy-plugin-aliases.js",
"packages/*/src/**/*.cjs",
],
dynamicRequireTargets: [
// https://github.com/mathiasbynens/regexpu-core/blob/ffd8fff2e31f4597f6fdfee75d5ac1c5c8111ec3/rewrite-pattern.js#L48
resolveChain(
import.meta.url,
"./packages/babel-helper-create-regexp-features-plugin",
"regexpu-core",
"regenerate-unicode-properties"
).replace(/\\/g, "/") + "/**/*.js", // Must be posix path in rollup 3
],
// Never delegate to the native require()
ignoreDynamicRequires: false,
// Align with the Node.js behavior
defaultIsModuleExports: true,
}),
rollupBabel({
envName,
babelHelpers: "bundled",
configFile: "./babel.config.js",
extensions: [".ts", ".js", ".mjs", ".cjs"],
ignore: ["packages/babel-runtime/helpers/*.js"],
}),
rollupNodeResolve({
extensions: [".ts", ".js", ".mjs", ".cjs", ".json"],
browser: buildStandalone,
exportConditions: buildStandalone ? ["browser"] : [],
// It needs to be set to 'false' when using rollupNodePolyfills
// https://github.com/rollup/plugins/issues/772
preferBuiltins: !buildStandalone,
}),
rollupJson(),
src === "packages/babel-parser" &&
getBabelOutputPlugin({
configFile: false,
babelrc: false,
plugins: [
function babelPluginInlineConstNumericObjects({ types: t }) {
return {
visitor: {
VariableDeclarator(path) {
const { node } = path;
if (
!t.isIdentifier(node.id) ||
!t.isObjectExpression(node.init)
) {
return;
}
const binding = path.scope.getBinding(node.id.name);
if (!binding.constant) return;
const vals = new Map();
for (const { key, value } of node.init.properties) {
if (!t.isIdentifier(key)) return;
if (!t.isNumericLiteral(value)) return;
vals.set(key.name, value.value);
}
let all = true;
binding.referencePaths.forEach(({ parentPath }) => {
const { node } = parentPath;
if (
!t.isMemberExpression(node) ||
!t.isIdentifier(node.property) ||
node.computed ||
!vals.has(node.property.name)
) {
all = false;
return;
}
parentPath.replaceWith(
t.numericLiteral(vals.get(node.property.name))
);
});
if (all) path.remove();
},
},
};
},
],
}),
buildStandalone &&
rollupPolyfillNode({
sourceMap: sourcemap,
include: "**/*.{js,mjs,cjs,ts}",
}),
].filter(Boolean),
acorn: {
// babel-cli/src/babel/index.ts has shebang
allowHashBang: true,
},
});
const outputFile = path.join(src, dest, filename || "index.js");
await bundle.write({
esModule: true,
file: outputFile,
format,
name,
sourcemap: sourcemap,
exports: "named",
interop(id) {
// We have manually applied commonjs-esm interop to the source
// for library not in this monorepo
// https://github.com/babel/babel/pull/12795
if (!id.startsWith("@babel/")) return "compat";
// Some syntax plugins have been archived
if (id.includes("plugin-syntax")) {
const srcPath = path.join(
path.dirname(fileURLToPath(import.meta.url)),
"/packages/" + id.replace("@babel/", "babel-")
);
if (!fs.existsSync(srcPath)) return "compat";
}
if (id.includes("@babel/preset-modules")) {
return "compat";
}
return "auto";
},
});
// Only minify @babel/standalone
if (!buildStandalone) {
return;
}
if (!process.env.IS_PUBLISH) {
log(
chalk.yellow(
`Skipped minification of '${chalk.cyan(
outputFile
)}' because not publishing`
)
);
return undefined;
}
log(`Minifying '${chalk.cyan(outputFile)}'...`);
await bundle.write({
file: outputFile.replace(/\.js$/, ".min.js"),
format,
esModule: true,
interop: "compat",
name,
sourcemap: sourcemap,
exports: "named",
plugins: [
rollupTerser({
// workaround https://bugs.webkit.org/show_bug.cgi?id=212725
format: {
ascii_only: true,
},
maxWorkers: process.env.CIRCLECI ? 1 : undefined,
}),
],
});
}
)
);
}
function buildRollupDts(packages) {
async function build(input, output, banner) {
log(`Bundling '${chalk.cyan(output)}' with rollup ...`);
const bundle = await rollup({
input,
plugins: [
bool(process.env.BABEL_8_BREAKING) ? rollupDts() : rollupDts5(),
],
});
await bundle.write({
file: output,
format: "es",
banner,
});
}
const tasks = packages.map(async packageName => {
const input = `${mapToDts(packageName)}/src/index.d.ts`;
const output = `${packageName}/lib/index.d.ts`;
await build(input, output);
});
tasks.push(
build(
"packages/babel-parser/typings/babel-parser.source.d.ts",
"packages/babel-parser/typings/babel-parser.d.ts",
"// This file is auto-generated! Do not modify it directly.\n/* eslint-disable import/no-extraneous-dependencies, @typescript-eslint/consistent-type-imports, prettier/prettier */"
)
);
return Promise.all(tasks);
}
function copyDts(packages) {
return getFiles(`${defaultPackagesGlob}/src/**/*.d.ts`, { include: packages })
.pipe(rename(file => path.resolve(file.base, mapToDts(file.relative))))
.pipe(gulp.dest(monorepoRoot));
}
function* libBundlesIterator() {
const noBundle = new Set([
// @rollup/plugin-commonjs will mess up with babel-helper-fixtures
"babel-helper-fixtures",
// babel-standalone is handled by rollup-babel-standalone task
"babel-standalone",
// todo: Rollup hangs on allowHashBang: true with babel-cli/src/babel/index.ts hashbang
"babel-cli",
// todo: @rollup/node-resolve 'browsers' option does not work when package.json contains `exports`
// https://github.com/rollup/plugins/tree/master/packages/node-resolve#browser
"babel-register",
"babel-core",
"babel-plugin-transform-runtime",
// @babel/node invokes internal lib/_babel-node.js
"babel-node",
// todo: test/helpers/define-helper requires internal lib/helpers access
"babel-helpers",
// multiple exports
"babel-plugin-transform-react-jsx",
// rollup bug https://github.com/babel/babel/pull/16001
"babel-helper-builder-react-jsx",
]);
for (const packageDir of ["packages", "codemods"]) {
for (const dir of fs.readdirSync(new URL(packageDir, import.meta.url))) {
if (noBundle.has(dir)) continue;
const src = `${packageDir}/${dir}`;
let pkgJSON;
try {
pkgJSON = JSON.parse(
fs.readFileSync(new URL(`${src}/package.json`, import.meta.url))
);
} catch (err) {
if (err.code !== "ENOENT" && err.code !== "ENOTDIR") throw err;
continue;
}
if (pkgJSON.main) {
yield {
src,
format: USE_ESM ? "esm" : "cjs",
dest: "lib",
input: getIndexFromPackage(src),
};
} else if (pkgJSON.bin) {
for (const binPath of Object.values(pkgJSON.bin)) {
const filename = binPath.slice(binPath.lastIndexOf("/") + 1);
const input =
dir === "babel-cli" && filename === "babel.js"
? `${src}/src/babel/index.ts`
: `${src}/src/${filename.slice(0, -3) + ".ts"}`;
yield {
src,
format: USE_ESM ? "esm" : "cjs",
dest: "lib",
filename,
input,
};
}
}
}
}
}
let libBundles;
if (bool(process.env.BABEL_8_BREAKING)) {
libBundles = Array.from(libBundlesIterator());
} else {
libBundles = [
"packages/babel-parser",
"packages/babel-plugin-proposal-destructuring-private",
"packages/babel-plugin-transform-object-rest-spread",
"packages/babel-plugin-transform-optional-chaining",
"packages/babel-preset-react",
"packages/babel-plugin-transform-destructuring",
"packages/babel-preset-typescript",
"packages/babel-helper-member-expression-to-functions",
"packages/babel-plugin-bugfix-v8-spread-parameters-in-optional-chaining",
"packages/babel-plugin-bugfix-v8-static-class-fields-redefine-readonly",
"packages/babel-plugin-bugfix-safari-id-destructuring-collision-in-function-expression",
].map(src => ({
src,
format: USE_ESM ? "esm" : "cjs",
dest: "lib",
input: getIndexFromPackage(src),
}));
}
const cjsBundles = [
// This is used by @babel/register and @babel/eslint-parser
{ src: "packages/babel-parser" },
];
const dtsBundles = ["packages/babel-types"];
const standaloneBundle = [
{
src: "packages/babel-standalone",
format: "umd",
name: "Babel",
filename: "babel.js",
dest: "",
version: babelVersion,
envName: "standalone",
input: getIndexFromPackage("packages/babel-standalone"),
},
];
gulp.task("generate-type-helpers", () => {
log("Generating @babel/types and @babel/traverse dynamic functions");
return Promise.all([
generateTypeHelpers("asserts"),
generateTypeHelpers("builders"),
generateTypeHelpers("builders", "uppercase.js"),
generateTypeHelpers("constants"),
generateTypeHelpers("validators"),
generateTypeHelpers("ast-types"),
generateTraverseHelpers("asserts"),
generateTraverseHelpers("validators"),
]);
});
gulp.task("generate-runtime-helpers", () => {
log("Generating @babel/helpers runtime helpers");
return generateRuntimeHelpers();
});
gulp.task("generate-standalone", () => generateStandalone());
gulp.task("build-rollup", () => buildRollup(libBundles));
gulp.task("rollup-babel-standalone", () => buildRollup(standaloneBundle, true));
gulp.task(
"build-babel-standalone",
gulp.series("generate-standalone", "rollup-babel-standalone")
);
gulp.task("copy-dts", () => copyDts(dtsBundles));
gulp.task(
"bundle-dts",
gulp.series("copy-dts", () => buildRollupDts(dtsBundles))
);
gulp.task("build-babel", () => buildBabel(true, /* exclude */ libBundles));
gulp.task("build-vendor", async () => {
const input = fileURLToPath(
importMetaResolve("import-meta-resolve", import.meta.url)
);
const output = "./packages/babel-core/src/vendor/import-meta-resolve.js";
const bundle = await rollup({
input,
onwarn(warning, warn) {
if (warning.code === "CIRCULAR_DEPENDENCY") return;
warn(warning);
},
plugins: [
rollupCommonJs({ defaultIsModuleExports: true }),
rollupNodeResolve({
extensions: [".js", ".mjs", ".cjs", ".json"],
preferBuiltins: true,
}),
{
// Remove the node: prefix from imports, so that it works in old Node.js version
// TODO(Babel 8): This can be removed.
transform: code => code.replace(/(?<=from ["'"])node:/g, ""),
},
],
});
await bundle.write({
file: output,
format: "es",
sourcemap: false,
exports: "named",
banner: String.raw`
/****************************************************************************\
* NOTE FROM BABEL AUTHORS *
* This file is inlined from https://github.com/wooorm/import-meta-resolve, *
* because we need to compile it to CommonJS. *
\****************************************************************************/
/*
${fs.readFileSync(path.join(path.dirname(input), "license"), "utf8")}*/
`,
});
fs.writeFileSync(
output.replace(".js", ".d.ts"),
`export function resolve(specifier: string, parent: string): string;`
);
});
gulp.task("build-cjs-bundles", () => {
if (!USE_ESM) {
log(
chalk.yellow(
"Skipping CJS-compat bundles for ESM-based builds, because not compiling to ESM"
)
);
return Promise.resolve();
}
return Promise.all(
cjsBundles.map(async ({ src, external = [] }) => {
const input = `./${src}/lib/index.js`;
const output = `./${src}/lib/index.cjs`;
const bundle = await rollup({
input,
external,
onwarn(warning, warn) {
if (warning.code === "CIRCULAR_DEPENDENCY") return;
warn(warning);
},
plugins: [
rollupCommonJs({ defaultIsModuleExports: true }),
rollupNodeResolve({
extensions: [".js", ".mjs", ".cjs", ".json"],
preferBuiltins: true,
}),
],
});
await bundle.write({
file: output,
format: "cjs",
interop: "compat",
sourcemap: false,
});
})
);
});
gulp.task(
"build",
gulp.series(
"build-vendor",
gulp.parallel("build-rollup", "build-babel"),
gulp.parallel("generate-type-helpers", "generate-runtime-helpers"),
// rebuild @babel/types and @babel/helpers since
// type-helpers and generated helpers may be changed
"build-babel",
gulp.parallel("generate-standalone", "build-cjs-bundles")
)
);
gulp.task("default", gulp.series("build"));
// First build on worker processes for compilation speed
gulp.task("build-no-bundle", () => buildBabel(true));
// Incremental builds take place in main process
gulp.task("build-no-bundle-watch", () => buildBabel(false));
gulp.task(
"build-dev",
gulp.series(
"build-vendor",
"build-no-bundle",
gulp.parallel(
"generate-standalone",
"generate-runtime-helpers",
gulp.series(
"generate-type-helpers",
// rebuild @babel/types since type-helpers may be changed
"build-no-bundle",
"build-cjs-bundles"
)
)
)
);
function watch() {
gulp.watch(defaultSourcesGlob, gulp.task("build-no-bundle-watch"));
gulp.watch(babelStandalonePluginConfigGlob, gulp.task("generate-standalone"));
gulp.watch(buildTypingsWatchGlob, gulp.task("generate-type-helpers"));
gulp.watch(
[
"./packages/babel-helpers/src/helpers/*.js",
"!./packages/babel-helpers/src/helpers/regeneratorRuntime.js",
],
gulp.task("generate-runtime-helpers")
);
if (USE_ESM) {
gulp.watch(
cjsBundles.map(({ src }) => `./${src}/lib/**.js`),
gulp.task("build-cjs-bundles")
);
}
}
gulp.task(
"watch",
process.env.WATCH_SKIP_BUILD ? watch : gulp.series("build-dev", watch)
);