140 lines
3.8 KiB
JavaScript
140 lines
3.8 KiB
JavaScript
const outputFile = require("output-file-sync");
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const kebabCase = require("lodash/kebabCase");
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const coreDefinitions = require("babel-plugin-transform-runtime").definitions;
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const helpers = require("babel-helpers");
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const babel = require("../../babel-core");
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const t = require("../../babel-types");
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const paths = ["is-iterable", "get-iterator"];
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Object.keys(coreDefinitions.builtins).forEach((key) => {
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const path = coreDefinitions.builtins[key];
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paths.push(path);
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});
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Object.keys(coreDefinitions.methods).forEach((key) => {
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const props = coreDefinitions.methods[key];
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Object.keys(props).forEach((key2) => {
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const path = props[key2];
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paths.push(path);
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});
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});
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paths.forEach(function(path) {
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writeFile(
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"core-js/" + path + ".js",
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defaultify(`require("core-js/library/fn/${path}")`)
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);
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});
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function relative(filename) {
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return `${__dirname}/../${filename}`;
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}
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function defaultify(name) {
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return `module.exports = { "default": '${name}", __esModule: true };`;
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}
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function writeRootFile(filename, content) {
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filename = relative(filename);
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//console.log(filename);
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outputFile(filename, content);
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}
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function writeFile(filename, content) {
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return writeRootFile(filename, content);
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}
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function makeTransformOpts(modules, useBuiltIns) {
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const opts = {
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presets: [[require("../../babel-preset-es2015"), { modules: false }]],
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plugins: [
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[
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require("../../babel-plugin-transform-runtime"),
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{ useBuiltIns, useESModules: modules === false },
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],
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],
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};
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if (modules === "commonjs") {
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opts.plugins.push([
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require("../../babel-plugin-transform-es2015-modules-commonjs"),
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{ loose: true, strict: false },
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]);
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} else if (modules !== false) {
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throw new Error("Unsupported module type");
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}
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return opts;
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}
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function buildRuntimeRewritePlugin(relativePath, helperName) {
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return {
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pre(file) {
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const original = file.get("helperGenerator");
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file.set("helperGenerator", (name) => {
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// make sure that helpers won't insert circular references to themselves
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if (name === helperName) return false;
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return original(name);
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});
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},
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visitor: {
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ImportDeclaration(path) {
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path.get("source").node.value = path
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.get("source")
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.node.value.replace(/^babel-runtime/, relativePath);
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},
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CallExpression(path) {
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if (
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!path.get("callee").isIdentifier({ name: "require" }) ||
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path.get("arguments").length !== 1 ||
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!path.get("arguments")[0].isStringLiteral()
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) {
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return;
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}
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// replace any reference to babel-runtime with a relative path
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path.get("arguments")[0].node.value = path
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.get("arguments")[0]
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.node.value.replace(/^babel-runtime/, relativePath);
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},
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},
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};
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}
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function buildHelper(helperName, modules, useBuiltIns) {
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const helper = helpers.get(helperName);
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// avoid an unneccessary TDZ in the easy case
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if (helper.type === "FunctionExpression") {
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helper.type = "FunctionDeclaration";
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}
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const tree = t.program([t.exportDefaultDeclaration(helper)]);
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const transformOpts = makeTransformOpts(modules, useBuiltIns);
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const relative = useBuiltIns ? "../.." : "..";
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return babel.transformFromAst(tree, null, {
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presets: transformOpts.presets,
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plugins: transformOpts.plugins.concat([
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buildRuntimeRewritePlugin(
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modules === false ? `../${relative}` : relative,
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helperName
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),
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]),
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}).code;
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}
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for (const modules of ["commonjs", false]) {
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for (const builtin of [false, true]) {
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const dirname = `helpers/${builtin ? "builtin/" : ""}${!modules ? "es6/" : ""}`;
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for (const helperName of helpers.list) {
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writeFile(
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`${dirname}${helperName}.js`,
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buildHelper(helperName, modules, builtin)
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);
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}
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}
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}
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