mirror of
https://github.com/denoland/deno.git
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334 lines
11 KiB
JavaScript
334 lines
11 KiB
JavaScript
// Copyright 2018 the Deno authors. All rights reserved. MIT license.
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// @ts-check
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import * as fs from "fs";
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import path from "path";
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import alias from "rollup-plugin-alias";
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import { plugin as analyze } from "rollup-plugin-analyzer";
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import commonjs from "rollup-plugin-commonjs";
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import globals from "rollup-plugin-node-globals";
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import nodeResolve from "rollup-plugin-node-resolve";
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import typescriptPlugin from "rollup-plugin-typescript2";
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import { createFilter } from "rollup-pluginutils";
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import typescript from "typescript";
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import MagicString from "magic-string";
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const mockPath = path.resolve(__dirname, "js/mock_builtin.js");
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const platformPath = path.resolve(__dirname, "js/platform.ts");
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const tsconfig = path.resolve(__dirname, "tsconfig.json");
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const typescriptPath = path.resolve(
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__dirname,
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"third_party/node_modules/typescript/lib/typescript.js"
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);
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// We will allow generated modules to be resolvable by TypeScript based on
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// the current build path
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const tsconfigOverride = {
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compilerOptions: {
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paths: {
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"*": ["*", path.resolve("*")]
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}
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}
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};
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/** this is a rollup plugin which will look for imports ending with `!string` and resolve
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* them with a module that will inline the contents of the file as a string. Needed to
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* support `js/assets.ts`.
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* @param {any} param0
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*/
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function strings(
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{ include, exclude } = { include: undefined, exclude: undefined }
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) {
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if (!include) {
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throw new Error("include option must be passed");
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}
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const filter = createFilter(include, exclude);
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return {
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name: "strings",
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/**
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* @param {string} importee
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*/
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resolveId(importee) {
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if (importee.endsWith("!string")) {
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// strip the `!string` from `importee`
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importee = importee.slice(0, importee.lastIndexOf("!string"));
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if (!importee.startsWith("gen/")) {
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// this is a static asset which is located relative to the root of
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// the source project
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return path.resolve(path.join(__dirname, importee));
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}
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// this is an asset which has been generated, therefore it will be
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// located within the build path
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return path.resolve(path.join(process.cwd(), importee));
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}
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},
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/**
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* @param {any} code
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* @param {string} id
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*/
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transform(code, id) {
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if (filter(id)) {
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return {
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code: `export default ${JSON.stringify(code)};`,
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map: { mappings: "" }
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};
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}
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}
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};
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}
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const archNodeToDeno = {
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x64: "x64"
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};
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const osNodeToDeno = {
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win32: "win",
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darwin: "mac",
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linux: "linux"
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};
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/** Inject deno.platform.arch and deno.platform.os
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* @param {any} param0
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*/
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function platform({ include, exclude } = {}) {
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if (!include) {
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throw new Error("include option must be passed");
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}
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const filter = createFilter(include, exclude);
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return {
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name: "platform",
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/**
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* @param {any} _code
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* @param {string} id
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*/
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transform(_code, id) {
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if (filter(id)) {
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// Adapted from https://github.com/rollup/rollup-plugin-inject/blob/master/src/index.js
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const arch = archNodeToDeno[process.arch];
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const os = osNodeToDeno[process.platform];
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// We do not have to worry about the interface here, because this is just to generate
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// the actual runtime code, not any type information integrated into Deno
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const magicString = new MagicString(`
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export const platform = { arch: "${arch}", os:"${os}" };`);
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return {
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code: magicString.toString(),
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map: magicString.generateMap()
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};
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}
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}
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};
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}
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// This plugin resolves at bundle time any generated resources that are
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// in the build path under `gen` and specified with a MID starting with `gen/`.
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// The plugin assumes that the MID needs to have the `.ts` extension appended.
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function resolveGenerated() {
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return {
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name: "resolve-msg-generated",
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resolveId(importee) {
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if (importee.startsWith("gen/msg_generated")) {
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return path.resolve(`${importee}.ts`);
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}
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}
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};
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}
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function generateDepFile({ outputFile, sourceFiles = [], configFiles = [] }) {
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let timestamp = new Date();
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// Save the depfile just before the node process exits.
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process.once("beforeExit", () =>
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writeDepFile({ outputFile, sourceFiles, configFiles, timestamp })
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);
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return {
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name: "depfile",
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load(sourceFile) {
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// The 'globals' plugin adds generated files that don't exist on disk.
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// Don't add them to the depfile.
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if (/^[0-9a-f]{30}$/.test(sourceFile)) {
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return;
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}
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sourceFiles.push(sourceFile);
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// Remember the time stamp that we last resolved a dependency.
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// We'll set the last modified time of the depfile to that.
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timestamp = new Date();
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}
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};
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}
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function writeDepFile({ outputFile, sourceFiles, configFiles, timestamp }) {
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const buildDir = process.cwd();
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const outputDir = path.dirname(outputFile);
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// Assert that the discovered bundle inputs are files that exist on disk.
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sourceFiles.forEach(f => fs.accessSync(f));
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// Since we also want to rebuild the bundle if rollup configuration or the the
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// tooling changes (e.g. when typescript is updated), add the currently loaded
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// node.js modules to the list of dependencies.
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let inputs = [...sourceFiles, ...configFiles, ...Object.keys(require.cache)];
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// Deduplicate the list of inputs.
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inputs = Array.from(new Set(inputs.map(f => path.resolve(f))));
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// Turn filenames into relative paths and format/escape them for a Makefile.
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inputs = inputs.map(formatPath);
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// Build a list of output filenames and normalize those too.
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const depFile = path.join(
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outputDir,
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path.basename(outputFile, path.extname(outputFile)) + ".d"
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);
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const outputs = [outputFile, depFile].map(formatPath);
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// Generate depfile contents.
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const depFileContent = [
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...outputs.map(filename => `${filename}: ` + inputs.join(" ") + "\n\n"),
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...inputs.map(filename => `${filename}:\n`)
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].join("");
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// Since we're writing the depfile when node's "beforeExit" hook triggers,
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// it's getting written _after_ the regular outputs are saved to disk.
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// Therefore, after writing the depfile, reset its timestamps to when we last
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// discovered a dependency, which was certainly before the bundle was built.
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fs.writeFileSync(depFile, depFileContent);
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fs.utimesSync(depFile, timestamp, timestamp);
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// Renders path to make it suitable for a depfile.
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function formatPath(filename) {
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// Make the path relative to the root build directory.
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filename = path.relative(buildDir, filename);
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// Use forward slashes on Windows.
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if (process.platform === "win32") {
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filename = filename.replace(/\\/g, "/");
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}
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// Escape spaces with a backslash. This is what rust and clang do too.
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filename = filename.replace(/ /g, "\\ ");
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return filename;
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}
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}
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export default function makeConfig(commandOptions) {
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return {
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output: {
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format: "iife",
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name: "denoMain",
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sourcemap: true,
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sourcemapExcludeSources: true
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},
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plugins: [
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// inject platform and arch from Node
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platform({
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include: [platformPath]
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}),
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// would prefer to use `rollup-plugin-virtual` to inject the empty module, but there
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// is an issue with `rollup-plugin-commonjs` which causes errors when using the
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// virtual plugin (see: rollup/rollup-plugin-commonjs#315), this means we have to use
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// a physical module to substitute
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alias({
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fs: mockPath,
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path: mockPath,
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os: mockPath,
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crypto: mockPath,
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buffer: mockPath,
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module: mockPath
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}),
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// Provides inlining of file contents for `js/assets.ts`
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strings({
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include: [
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"*.d.ts",
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`${__dirname}/**/*.d.ts`,
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`${process.cwd()}/**/*.d.ts`
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]
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}),
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// Resolves any resources that have been generated at build time
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resolveGenerated(),
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// Allows rollup to resolve modules based on Node.js resolution
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nodeResolve({
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jsnext: true,
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main: true
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}),
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// Allows rollup to import CommonJS modules
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commonjs({
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namedExports: {
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// Static analysis of `typescript.js` does detect the exports properly, therefore
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// rollup requires them to be explicitly defined to make them available in the
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// bundle
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[typescriptPath]: [
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"createLanguageService",
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"formatDiagnosticsWithColorAndContext",
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"ModuleKind",
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"ScriptKind",
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"ScriptSnapshot",
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"ScriptTarget",
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"version"
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]
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}
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}),
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typescriptPlugin({
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// The build script is invoked from `out/:target` so passing an absolute file path is needed
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tsconfig,
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// This provides any overrides to the `tsconfig.json` that are needed to bundle
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tsconfigOverride,
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// This provides the locally configured version of TypeScript instead of the plugins
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// default version
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typescript,
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// By default, the include path only includes the cwd and below, need to include the root of the project
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// and build path to be passed to this plugin. This is different front tsconfig.json include
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include: ["*.ts", `${__dirname}/**/*.ts`, `${process.cwd()}/**/*.ts`],
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// d.ts files are not bundled and by default like include, it only includes the cwd and below
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exclude: [
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"*.d.ts",
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`${__dirname}/**/*.d.ts`,
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`${process.cwd()}/**/*.d.ts`
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]
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}),
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// Provide some concise information about the bundle
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analyze({
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skipFormatted: true,
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onAnalysis({
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bundleSize,
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bundleOrigSize,
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bundleReduction,
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moduleCount
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}) {
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if (!commandOptions.silent) {
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console.log(
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`Bundle size: ${Math.round((bundleSize / 1000000) * 100) / 100}Mb`
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);
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console.log(
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`Original size: ${Math.round((bundleOrigSize / 1000000) * 100) /
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100}Mb`
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);
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console.log(`Reduction: ${bundleReduction}%`);
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console.log(`Module count: ${moduleCount}`);
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}
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}
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}),
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// source-map-support, which is required by TypeScript to support source maps, requires Node.js Buffer
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// implementation. This needs to come at the end of the plugins because of the impact it has on
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// the existing runtime environment, which breaks other plugins and features of the bundler.
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globals(),
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generateDepFile({
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outputFile: commandOptions.o,
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configFiles: [commandOptions.c, tsconfig]
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})
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]
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};
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}
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