Mirror: 🎩 A tiny but capable push & pull stream library for TypeScript and Flow
Move bs-platform minification to chunk plugin
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rollup.config.js
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rollup.config.js
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import { terser } from 'rollup-plugin-terser';
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import compiler from '@ampproject/rollup-plugin-closure-compiler';
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import minifyBucklescript from './scripts/minify-bucklescript-plugin';
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const cwd = process.cwd();
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const pkgInfo = require('./package.json');
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const name = basename(pkgInfo.main, '.js');
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},
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});
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const unwrapStatePlugin = ({ types: t }) => ({
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pre() {
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this.props = new Map();
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this.test = (node) =>
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/state$/i.test(node.id.name) ||
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(node.init.properties.length === 1 && node.init.properties[0].key.name === 'contents');
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},
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visitor: {
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VariableDeclarator(path) {
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if (
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t.isIdentifier(path.node.id) &&
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t.isObjectExpression(path.node.init) &&
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path.node.init.properties.every(
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(prop) => t.isObjectProperty(prop) && t.isIdentifier(prop.key)
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) &&
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this.test(path.node)
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) {
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const id = path.node.id.name;
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const properties = path.node.init.properties;
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const propNames = new Set(properties.map((x) => x.key.name));
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const decl = properties.map((prop) => {
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const key = `${id}$${prop.key.name}`;
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return t.variableDeclarator(t.identifier(key), prop.value);
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});
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this.props.set(id, propNames);
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path.parentPath.replaceWithMultiple(t.variableDeclaration('let', decl));
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}
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},
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MemberExpression(path) {
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if (
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t.isIdentifier(path.node.object) &&
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this.props.has(path.node.object.name) &&
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t.isIdentifier(path.node.property) &&
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this.props.get(path.node.object.name).has(path.node.property.name)
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) {
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const id = path.node.object.name;
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const propName = path.node.property.name;
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path.replaceWith(t.identifier(`${id}$${propName}`));
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}
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},
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},
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});
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const curryGuaranteePlugin = ({ types: t }) => {
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const curryFnName = /^_(\d)$/;
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const lengthId = t.identifier('length');
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const bindId = t.identifier('bind');
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return {
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visitor: {
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CallExpression(path) {
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if (
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!t.isMemberExpression(path.node.callee) ||
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!t.isIdentifier(path.node.callee.object) ||
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!t.isIdentifier(path.node.callee.property) ||
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!path.node.callee.object.name === 'Curry' ||
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!curryFnName.test(path.node.callee.property.name)
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)
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return;
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const callFn = path.node.arguments[0];
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const callArgs = path.node.arguments.slice(1);
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if (t.isExpressionStatement(path.parent)) {
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path.replaceWith(t.callExpression(callFn, callArgs));
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return;
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}
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const arityLiteral = t.numericLiteral(callArgs.length);
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const argIds = callArgs.map((init) => {
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if (t.isIdentifier(init)) return init;
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const id = path.scope.generateUidIdentifierBasedOnNode(path.node.id);
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path.scope.push({ id, init });
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return id;
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});
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path.replaceWith(
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t.conditionalExpression(
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t.binaryExpression('===', t.memberExpression(callFn, lengthId), arityLiteral),
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t.callExpression(callFn, argIds),
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t.callExpression(t.memberExpression(callFn, bindId), [t.nullLiteral()].concat(argIds))
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)
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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 makePlugins = (isProduction) =>
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[
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babel({
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extensions: ['ts', 'tsx', 'js'],
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exclude: 'node_modules/**',
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presets: [],
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plugins: ['babel-plugin-closure-elimination', unwrapStatePlugin, curryGuaranteePlugin],
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plugins: ['babel-plugin-closure-elimination'],
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}),
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minifyBucklescript(),
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compiler({
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formatting: 'PRETTY_PRINT',
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compilation_level: 'SIMPLE_OPTIMIZATIONS',
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scripts/minify-bucklescript-plugin.js
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scripts/minify-bucklescript-plugin.js
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import { transformSync as transform } from '@babel/core';
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import { createFilter } from 'rollup-pluginutils';
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function unwrapStatePlugin({ types: t }) {
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return {
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pre() {
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this.props = new Map();
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this.test = (node) =>
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/state$/i.test(node.id.name) ||
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(node.init.properties.length === 1 && node.init.properties[0].key.name === 'contents');
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},
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visitor: {
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VariableDeclarator(path) {
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if (
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t.isIdentifier(path.node.id) &&
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t.isObjectExpression(path.node.init) &&
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path.node.init.properties.every(
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(prop) => t.isObjectProperty(prop) && t.isIdentifier(prop.key)
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) &&
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this.test(path.node)
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) {
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const id = path.node.id.name;
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const properties = path.node.init.properties;
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const propNames = new Set(properties.map((x) => x.key.name));
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const decl = properties.map((prop) => {
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const key = `${id}$${prop.key.name}`;
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return t.variableDeclarator(t.identifier(key), prop.value);
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});
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this.props.set(id, propNames);
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path.parentPath.replaceWithMultiple(t.variableDeclaration('let', decl));
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}
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},
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MemberExpression(path) {
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if (
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t.isIdentifier(path.node.object) &&
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this.props.has(path.node.object.name) &&
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t.isIdentifier(path.node.property) &&
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this.props.get(path.node.object.name).has(path.node.property.name)
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) {
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const id = path.node.object.name;
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const propName = path.node.property.name;
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path.replaceWith(t.identifier(`${id}$${propName}`));
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}
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},
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},
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};
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}
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function curryGuaranteePlugin({ types: t }) {
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const curryFnName = /^_(\d)$/;
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const lengthId = t.identifier('length');
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const bindId = t.identifier('bind');
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return {
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visitor: {
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CallExpression(path) {
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if (!t.isIdentifier(path.node.callee) || !curryFnName.test(path.node.callee.name)) {
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return;
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}
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const callFn = path.node.arguments[0];
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const callArgs = path.node.arguments.slice(1);
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if (t.isExpressionStatement(path.parent)) {
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path.replaceWith(t.callExpression(callFn, callArgs));
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return;
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}
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if (t.isIdentifier(callFn) && path.scope.hasBinding(callFn.name)) {
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const callFnDefinition = path.scope.getBinding(callFn.name).path.node;
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if (
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t.isFunctionDeclaration(callFnDefinition) &&
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callFnDefinition.params.length === callArgs.length
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) {
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path.replaceWith(t.callExpression(callFn, callArgs));
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return;
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}
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}
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const arityLiteral = t.numericLiteral(callArgs.length);
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const argIds = callArgs.map((init) => {
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if (t.isIdentifier(init)) return init;
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const id = path.scope.generateUidIdentifierBasedOnNode(path.node.id);
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path.scope.push({ id, init });
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return id;
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});
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path.replaceWith(
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t.conditionalExpression(
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t.binaryExpression('===', t.memberExpression(callFn, lengthId), arityLiteral),
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t.callExpression(callFn, argIds),
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t.callExpression(t.memberExpression(callFn, bindId), [t.nullLiteral()].concat(argIds))
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)
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);
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},
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},
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};
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}
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function cleanup(opts = {}) {
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const filter = createFilter(opts.include, opts.exclude, {
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resolve: false,
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});
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return {
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name: 'minifyBucklescript',
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renderChunk(code, chunk) {
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if (!filter(chunk.fileName)) {
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return null;
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}
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return transform(code, {
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plugins: [unwrapStatePlugin, curryGuaranteePlugin],
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babelrc: false,
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});
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},
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};
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}
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export default cleanup;