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306 lines
9.4 KiB
306 lines
9.4 KiB
/**
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* Run this script to convert the project to TypeScript. This is only guaranteed to work
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* on the unmodified default template; if you have done code changes you are likely need
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* to touch up the generated project manually.
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*/
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// @ts-check
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const fs = require('fs');
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const path = require('path');
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const { argv } = require('process');
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const projectRoot = argv[2] || path.join(__dirname, '..');
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const isRollup = fs.existsSync(path.join(projectRoot, "rollup.config.js"));
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function warn(message) {
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console.warn('Warning: ' + message);
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}
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function replaceInFile(fileName, replacements) {
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if (fs.existsSync(fileName)) {
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let contents = fs.readFileSync(fileName, 'utf8');
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let hadUpdates = false;
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replacements.forEach(([from, to]) => {
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const newContents = contents.replace(from, to);
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const isAlreadyApplied = typeof to !== 'string' || contents.includes(to);
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if (newContents !== contents) {
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contents = newContents;
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hadUpdates = true;
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} else if (!isAlreadyApplied) {
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warn(`Wanted to update "${from}" in ${fileName}, but did not find it.`);
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}
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});
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if (hadUpdates) {
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fs.writeFileSync(fileName, contents);
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} else {
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console.log(`${fileName} had already been updated.`);
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}
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} else {
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warn(`Wanted to update ${fileName} but the file did not exist.`);
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}
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}
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function createFile(fileName, contents) {
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if (fs.existsSync(fileName)) {
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warn(`Wanted to create ${fileName}, but it already existed. Leaving existing file.`);
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} else {
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fs.writeFileSync(fileName, contents);
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}
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}
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function addDepsToPackageJson() {
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const pkgJSONPath = path.join(projectRoot, 'package.json');
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const packageJSON = JSON.parse(fs.readFileSync(pkgJSONPath, 'utf8'));
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packageJSON.devDependencies = Object.assign(packageJSON.devDependencies, {
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...(isRollup ? { '@rollup/plugin-typescript': '^6.0.0' } : { 'ts-loader': '^8.0.4' }),
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'@tsconfig/svelte': '^1.0.10',
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'@types/compression': '^1.7.0',
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'@types/node': '^14.11.1',
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'@types/polka': '^0.5.1',
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'svelte-check': '^1.0.46',
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'svelte-preprocess': '^4.3.0',
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tslib: '^2.0.1',
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typescript: '^4.0.3'
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});
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// Add script for checking
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packageJSON.scripts = Object.assign(packageJSON.scripts, {
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validate: 'svelte-check --ignore src/node_modules/@sapper'
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});
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// Write the package JSON
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fs.writeFileSync(pkgJSONPath, JSON.stringify(packageJSON, null, ' '));
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}
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function changeJsExtensionToTs(dir) {
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const elements = fs.readdirSync(dir, { withFileTypes: true });
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for (let i = 0; i < elements.length; i++) {
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if (elements[i].isDirectory()) {
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changeJsExtensionToTs(path.join(dir, elements[i].name));
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} else if (elements[i].name.match(/^[^_]((?!json).)*js$/)) {
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fs.renameSync(path.join(dir, elements[i].name), path.join(dir, elements[i].name).replace('.js', '.ts'));
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}
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}
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}
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function updateSingleSvelteFile({ view, vars, contextModule }) {
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replaceInFile(path.join(projectRoot, 'src', `${view}.svelte`), [
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[/(?:<script)(( .*?)*?)>/gm, (m, attrs) => `<script${attrs}${!attrs.includes('lang="ts"') ? ' lang="ts"' : ''}>`],
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...(vars ? vars.map(({ name, type }) => [`export let ${name};`, `export let ${name}: ${type};`]) : []),
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...(contextModule ? contextModule.map(({ js, ts }) => [js, ts]) : [])
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]);
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}
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// Switch the *.svelte file to use TS
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function updateSvelteFiles() {
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[
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{
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view: 'components/Nav',
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vars: [{ name: 'segment', type: 'string' }]
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},
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{
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view: 'routes/_layout',
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vars: [{ name: 'segment', type: 'string' }]
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},
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{
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view: 'routes/_error',
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vars: [
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{ name: 'status', type: 'number' },
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{ name: 'error', type: 'Error' }
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]
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},
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{
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view: 'routes/blog/index',
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vars: [{ name: 'posts', type: '{ slug: string; title: string, html: any }[]' }],
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contextModule: [
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{
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js: '.then(r => r.json())',
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ts: '.then((r: { json: () => any; }) => r.json())'
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},
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{
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js: '.then(posts => {',
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ts: '.then((posts: { slug: string; title: string, html: any }[]) => {'
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}
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]
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},
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{
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view: 'routes/blog/[slug]',
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vars: [{ name: 'post', type: '{ slug: string; title: string, html: any }' }]
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}
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].forEach(updateSingleSvelteFile);
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}
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function updateRollupConfig() {
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// Edit rollup config
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replaceInFile(path.join(projectRoot, 'rollup.config.js'), [
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// Edit imports
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[
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/'rollup-plugin-terser';\n(?!import sveltePreprocess)/,
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`'rollup-plugin-terser';
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import sveltePreprocess from 'svelte-preprocess';
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import typescript from '@rollup/plugin-typescript';
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`
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],
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// Edit inputs
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[
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/(?<!THIS_IS_UNDEFINED[^\n]*\n\s*)onwarn\(warning\);/,
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`(warning.code === 'THIS_IS_UNDEFINED') ||\n\tonwarn(warning);`
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],
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[/input: config.client.input\(\)(?!\.replace)/, `input: config.client.input().replace(/\\.js$/, '.ts')`],
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[
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/input: config.server.input\(\)(?!\.replace)/,
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`input: { server: config.server.input().server.replace(/\\.js$/, ".ts") }`
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],
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[
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/input: config.serviceworker.input\(\)(?!\.replace)/,
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`input: config.serviceworker.input().replace(/\\.js$/, '.ts')`
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],
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// Add preprocess
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[/compilerOptions/g, 'preprocess: sveltePreprocess({ sourceMap: dev }),\n\t\t\t\tcompilerOptions'],
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// Add TypeScript
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[/commonjs\(\)(?!,\n\s*typescript)/g, 'commonjs(),\n\t\t\ttypescript({ sourceMap: dev })']
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]);
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}
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function updateWebpackConfig() {
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// Edit webpack config
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replaceInFile(path.join(projectRoot, 'webpack.config.js'), [
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// Edit imports
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[
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/require\('webpack-modules'\);\n(?!const sveltePreprocess)/,
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`require('webpack-modules');\nconst sveltePreprocess = require('svelte-preprocess');\n`
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],
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// Edit extensions
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[
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/\['\.mjs', '\.js', '\.json', '\.svelte', '\.html'\]/,
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`['.mjs', '.js', '.ts', '.json', '.svelte', '.html']`
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],
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// Edit entries
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[
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/entry: config\.client\.entry\(\)/,
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`entry: { main: config.client.entry().main.replace(/\\.js$/, '.ts') }`
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],
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[
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/entry: config\.server\.entry\(\)/,
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`entry: { server: config.server.entry().server.replace(/\\.js$/, '.ts') }`
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],
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[
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/entry: config\.serviceworker\.entry\(\)/,
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`entry: { 'service-worker': config.serviceworker.entry()['service-worker'].replace(/\\.js$/, '.ts') }`
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],
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// Add preprocess to the svelte config, this is tricky because there's no easy signifier.
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// Instead we look for 'hydratable: true,'
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[
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/hydratable: true(?!,\n\s*preprocess)/g,
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'hydratable: true,\n\t\t\t\t\t\t\tpreprocess: sveltePreprocess({ sourceMap: dev })'
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],
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// Add TypeScript rules for client and server
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[
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/module: {\n\s*rules: \[\n\s*(?!{\n\s*test: \/\\\.ts\$\/)/g,
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`module: {\n\t\t\trules: [\n\t\t\t\t{\n\t\t\t\t\ttest: /\\.ts$/,\n\t\t\t\t\tloader: 'ts-loader'\n\t\t\t\t},\n\t\t\t\t`
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],
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// Add TypeScript rules for serviceworker
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[
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/output: config\.serviceworker\.output\(\),\n\s*(?!module)/,
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`output: config.serviceworker.output(),\n\t\tmodule: {\n\t\t\trules: [\n\t\t\t\t{\n\t\t\t\t\ttest: /\\.ts$/,\n\t\t\t\t\tloader: 'ts-loader'\n\t\t\t\t}\n\t\t\t]\n\t\t},\n\t\t`
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],
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// Edit outputs
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[
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/output: config\.serviceworker\.output\(\),\n\s*(?!resolve)/,
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`output: config.serviceworker.output(),\n\t\tresolve: { extensions: ['.mjs', '.js', '.ts', '.json'] },\n\t\t`
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]
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]);
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}
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function updateServiceWorker() {
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replaceInFile(path.join(projectRoot, 'src', 'service-worker.ts'), [
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[`shell.concat(files);`, `(shell as string[]).concat(files as string[]);`],
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[`self.skipWaiting();`, `((self as any) as ServiceWorkerGlobalScope).skipWaiting();`],
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[`self.clients.claim();`, `((self as any) as ServiceWorkerGlobalScope).clients.claim();`],
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[`fetchAndCache(request)`, `fetchAndCache(request: Request)`],
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[`self.addEventListener('activate', event =>`, `self.addEventListener('activate', (event: ExtendableEvent) =>`],
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[`self.addEventListener('install', event =>`, `self.addEventListener('install', (event: ExtendableEvent) =>`],
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[`addEventListener('fetch', event =>`, `addEventListener('fetch', (event: FetchEvent) =>`],
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]);
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}
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function createTsConfig() {
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const tsconfig = `{
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"extends": "@tsconfig/svelte/tsconfig.json",
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"compilerOptions": {
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"lib": ["DOM", "ES2017", "WebWorker"]
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},
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"include": ["src/**/*", "src/node_modules/**/*"],
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"exclude": ["node_modules/*", "__sapper__/*", "static/*"]
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}`;
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createFile(path.join(projectRoot, 'tsconfig.json'), tsconfig);
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}
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// Adds the extension recommendation
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function configureVsCode() {
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const dir = path.join(projectRoot, '.vscode');
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if (!fs.existsSync(dir)) {
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fs.mkdirSync(dir);
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}
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createFile(path.join(projectRoot, '.vscode', 'extensions.json'), `{"recommendations": ["svelte.svelte-vscode"]}`);
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}
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function deleteThisScript() {
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fs.unlinkSync(path.join(__filename));
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// Check for Mac's DS_store file, and if it's the only one left remove it
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const remainingFiles = fs.readdirSync(path.join(__dirname));
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if (remainingFiles.length === 1 && remainingFiles[0] === '.DS_store') {
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fs.unlinkSync(path.join(__dirname, '.DS_store'));
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}
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// Check if the scripts folder is empty
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if (fs.readdirSync(path.join(__dirname)).length === 0) {
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// Remove the scripts folder
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fs.rmdirSync(path.join(__dirname));
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}
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}
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console.log(`Adding TypeScript with ${isRollup ? "Rollup" : "webpack" }...`);
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addDepsToPackageJson();
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changeJsExtensionToTs(path.join(projectRoot, 'src'));
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updateSvelteFiles();
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if (isRollup) {
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updateRollupConfig();
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} else {
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updateWebpackConfig();
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}
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updateServiceWorker();
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createTsConfig();
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configureVsCode();
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// Delete this script, but not during testing
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if (!argv[2]) {
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deleteThisScript();
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}
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console.log('Converted to TypeScript.');
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if (fs.existsSync(path.join(projectRoot, 'node_modules'))) {
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console.log(`
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Next:
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1. run 'npm install' again to install TypeScript dependencies
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2. run 'npm run build' for the @sapper imports in your project to work
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`);
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}
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