forked from mystiq/hydrogen-web
125 lines
4.6 KiB
JavaScript
125 lines
4.6 KiB
JavaScript
/*
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Copyright 2020 The Matrix.org Foundation C.I.C.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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const fsRoot = require("fs");
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const fs = fsRoot.promises;
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const path = require("path");
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const { rollup } = require('rollup');
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const { fileURLToPath } = require('url');
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const { dirname } = require('path');
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// needed to translate commonjs modules to esm
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const commonjs = require('@rollup/plugin-commonjs');
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const { nodeResolve } = require('@rollup/plugin-node-resolve');
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const projectDir = path.join(__dirname, "../");
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async function removeDirIfExists(targetDir) {
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try {
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await fs.rmdir(targetDir, {recursive: true});
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} catch (err) {
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if (err.code !== "ENOENT") {
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throw err;
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}
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}
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}
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/** function used to resolve common-js require calls below. */
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function packageIterator(request, start, defaultIterator) {
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// this is just working for bs58, would need to tune it further for other dependencies
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if (request === "safe-buffer") {
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return [path.join(projectDir, "/scripts/package-overrides/safe-buffer")];
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} else if (request === "buffer/") {
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return [path.join(projectDir, "/scripts/package-overrides/buffer")];
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} else {
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return defaultIterator();
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}
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}
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async function commonjsToESM(src, dst) {
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// create js bundle
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const bundle = await rollup({
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treeshake: {moduleSideEffects: false},
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input: src,
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plugins: [commonjs(), nodeResolve({
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browser: true,
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preferBuiltins: false,
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customResolveOptions: {packageIterator}
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})]
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});
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const {output} = await bundle.generate({
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format: 'es'
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});
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const code = output[0].code;
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await fs.writeFile(dst, code, "utf8");
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}
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async function populateLib() {
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const libDir = path.join(projectDir, "lib/");
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await removeDirIfExists(libDir);
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await fs.mkdir(libDir);
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const olmSrcDir = path.dirname(require.resolve("olm"));
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const olmDstDir = path.join(libDir, "olm/");
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await fs.mkdir(olmDstDir);
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for (const file of ["olm.js", "olm.wasm", "olm_legacy.js"]) {
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await fs.symlink(path.join(olmSrcDir, file), path.join(olmDstDir, file));
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}
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// transpile another-json to esm
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await fs.mkdir(path.join(libDir, "another-json/"));
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await commonjsToESM(
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require.resolve('another-json/another-json.js'),
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path.join(libDir, "another-json/index.js")
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);
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// transpile bs58 to esm
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await fs.mkdir(path.join(libDir, "bs58/"));
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await commonjsToESM(
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require.resolve('bs58/index.js'),
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path.join(libDir, "bs58/index.js")
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);
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// transpile base64-arraybuffer to esm
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await fs.mkdir(path.join(libDir, "base64-arraybuffer/"));
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await commonjsToESM(
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require.resolve('base64-arraybuffer/lib/base64-arraybuffer.js'),
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path.join(libDir, "base64-arraybuffer/index.js")
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);
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// this probably should no go in here, we can just import "aes-js" from legacy-extras.js
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// as that file is never loaded from a browser
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// transpile aesjs to esm
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await fs.mkdir(path.join(libDir, "aes-js/"));
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await commonjsToESM(
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require.resolve('aes-js/index.js'),
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path.join(libDir, "aes-js/index.js")
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);
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// es6-promise is already written as an es module,
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// but it does need to be babelified, and current we don't babelify
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// anything in node_modules in the build script, so make a bundle that
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// is conveniently not placed in node_modules rather than symlinking.
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await fs.mkdir(path.join(libDir, "es6-promise/"));
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await commonjsToESM(
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require.resolve('es6-promise/lib/es6-promise/promise.js'),
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path.join(libDir, "es6-promise/index.js")
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);
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// fake-indexeddb, used for tests (but unresolvable bare imports also makes the build complain)
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// and might want to use it for in-memory storage too, although we probably do ts->es6 with esm
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// directly rather than ts->es5->es6 as we do now. The bundle is 240K currently.
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await fs.mkdir(path.join(libDir, "fake-indexeddb/"));
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await commonjsToESM(
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path.join(projectDir, "/scripts/package-overrides/fake-indexeddb.js"),
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path.join(libDir, "fake-indexeddb/index.js")
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);
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}
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populateLib();
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