Rinze/scripts/setupTypeScript.js

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2021-01-24 18:21:43 +00:00
/**
* Run this script to convert the project to TypeScript. This is only guaranteed to work
* on the unmodified default template; if you have done code changes you are likely need
* to touch up the generated project manually.
*/
// @ts-check
const fs = require('fs');
const path = require('path');
const { argv } = require('process');
const projectRoot = argv[2] || path.join(__dirname, '..');
const isRollup = fs.existsSync(path.join(projectRoot, "rollup.config.js"));
function warn(message) {
console.warn('Warning: ' + message);
}
function replaceInFile(fileName, replacements) {
if (fs.existsSync(fileName)) {
let contents = fs.readFileSync(fileName, 'utf8');
let hadUpdates = false;
replacements.forEach(([from, to]) => {
const newContents = contents.replace(from, to);
const isAlreadyApplied = typeof to !== 'string' || contents.includes(to);
if (newContents !== contents) {
contents = newContents;
hadUpdates = true;
} else if (!isAlreadyApplied) {
warn(`Wanted to update "${from}" in ${fileName}, but did not find it.`);
}
});
if (hadUpdates) {
fs.writeFileSync(fileName, contents);
} else {
console.log(`${fileName} had already been updated.`);
}
} else {
warn(`Wanted to update ${fileName} but the file did not exist.`);
}
}
function createFile(fileName, contents) {
if (fs.existsSync(fileName)) {
warn(`Wanted to create ${fileName}, but it already existed. Leaving existing file.`);
} else {
fs.writeFileSync(fileName, contents);
}
}
function addDepsToPackageJson() {
const pkgJSONPath = path.join(projectRoot, 'package.json');
const packageJSON = JSON.parse(fs.readFileSync(pkgJSONPath, 'utf8'));
packageJSON.devDependencies = Object.assign(packageJSON.devDependencies, {
...(isRollup ? { '@rollup/plugin-typescript': '^6.0.0' } : { 'ts-loader': '^8.0.4' }),
'@tsconfig/svelte': '^1.0.10',
'@types/compression': '^1.7.0',
'@types/node': '^14.11.1',
'@types/polka': '^0.5.1',
'svelte-check': '^1.0.46',
'svelte-preprocess': '^4.3.0',
tslib: '^2.0.1',
typescript: '^4.0.3'
});
// Add script for checking
packageJSON.scripts = Object.assign(packageJSON.scripts, {
validate: 'svelte-check --ignore src/node_modules/@sapper'
});
// Write the package JSON
fs.writeFileSync(pkgJSONPath, JSON.stringify(packageJSON, null, ' '));
}
function changeJsExtensionToTs(dir) {
const elements = fs.readdirSync(dir, { withFileTypes: true });
for (let i = 0; i < elements.length; i++) {
if (elements[i].isDirectory()) {
changeJsExtensionToTs(path.join(dir, elements[i].name));
} else if (elements[i].name.match(/^[^_]((?!json).)*js$/)) {
fs.renameSync(path.join(dir, elements[i].name), path.join(dir, elements[i].name).replace('.js', '.ts'));
}
}
}
function updateSingleSvelteFile({ view, vars, contextModule }) {
replaceInFile(path.join(projectRoot, 'src', `${view}.svelte`), [
[/(?:<script)(( .*?)*?)>/gm, (m, attrs) => `<script${attrs}${!attrs.includes('lang="ts"') ? ' lang="ts"' : ''}>`],
...(vars ? vars.map(({ name, type }) => [`export let ${name};`, `export let ${name}: ${type};`]) : []),
...(contextModule ? contextModule.map(({ js, ts }) => [js, ts]) : [])
]);
}
// Switch the *.svelte file to use TS
function updateSvelteFiles() {
[
{
view: 'components/Nav',
vars: [{ name: 'segment', type: 'string' }]
},
{
view: 'routes/_layout',
vars: [{ name: 'segment', type: 'string' }]
},
{
view: 'routes/_error',
vars: [
{ name: 'status', type: 'number' },
{ name: 'error', type: 'Error' }
]
},
{
view: 'routes/blog/index',
vars: [{ name: 'posts', type: '{ slug: string; title: string, html: any }[]' }],
contextModule: [
{
js: '.then(r => r.json())',
ts: '.then((r: { json: () => any; }) => r.json())'
},
{
js: '.then(posts => {',
ts: '.then((posts: { slug: string; title: string, html: any }[]) => {'
}
]
},
{
view: 'routes/blog/[slug]',
vars: [{ name: 'post', type: '{ slug: string; title: string, html: any }' }]
}
].forEach(updateSingleSvelteFile);
}
function updateRollupConfig() {
// Edit rollup config
replaceInFile(path.join(projectRoot, 'rollup.config.js'), [
// Edit imports
[
/'rollup-plugin-terser';\n(?!import sveltePreprocess)/,
`'rollup-plugin-terser';
import sveltePreprocess from 'svelte-preprocess';
import typescript from '@rollup/plugin-typescript';
`
],
// Edit inputs
[
/(?<!THIS_IS_UNDEFINED[^\n]*\n\s*)onwarn\(warning\);/,
`(warning.code === 'THIS_IS_UNDEFINED') ||\n\tonwarn(warning);`
],
[/input: config.client.input\(\)(?!\.replace)/, `input: config.client.input().replace(/\\.js$/, '.ts')`],
[
/input: config.server.input\(\)(?!\.replace)/,
`input: { server: config.server.input().server.replace(/\\.js$/, ".ts") }`
],
[
/input: config.serviceworker.input\(\)(?!\.replace)/,
`input: config.serviceworker.input().replace(/\\.js$/, '.ts')`
],
// Add preprocess
[/compilerOptions/g, 'preprocess: sveltePreprocess(),\n\t\t\t\tcompilerOptions'],
// Add TypeScript
[/commonjs\(\)(?!,\n\s*typescript)/g, 'commonjs(),\n\t\t\ttypescript({ sourceMap: dev })']
]);
}
function updateWebpackConfig() {
// Edit webpack config
replaceInFile(path.join(projectRoot, 'webpack.config.js'), [
// Edit imports
[
/require\('webpack-modules'\);\n(?!const sveltePreprocess)/,
`require('webpack-modules');\nconst sveltePreprocess = require('svelte-preprocess');\n`
],
// Edit extensions
[
/\['\.mjs', '\.js', '\.json', '\.svelte', '\.html'\]/,
`['.mjs', '.js', '.ts', '.json', '.svelte', '.html']`
],
// Edit entries
[
/entry: config\.client\.entry\(\)/,
`entry: { main: config.client.entry().main.replace(/\\.js$/, '.ts') }`
],
[
/entry: config\.server\.entry\(\)/,
`entry: { server: config.server.entry().server.replace(/\\.js$/, '.ts') }`
],
[
/entry: config\.serviceworker\.entry\(\)/,
`entry: { 'service-worker': config.serviceworker.entry()['service-worker'].replace(/\\.js$/, '.ts') }`
],
// Add preprocess to the svelte config, this is tricky because there's no easy signifier.
// Instead we look for 'hydratable: true,'
[
/hydratable: true(?!,\n\s*preprocess)/g,
'hydratable: true,\n\t\t\t\t\t\t\tpreprocess: sveltePreprocess()'
],
// Add TypeScript rules for client and server
[
/module: {\n\s*rules: \[\n\s*(?!{\n\s*test: \/\\\.ts\$\/)/g,
`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`
],
// Add TypeScript rules for serviceworker
[
/output: config\.serviceworker\.output\(\),\n\s*(?!module)/,
`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`
],
// Edit outputs
[
/output: config\.serviceworker\.output\(\),\n\s*(?!resolve)/,
`output: config.serviceworker.output(),\n\t\tresolve: { extensions: ['.mjs', '.js', '.ts', '.json'] },\n\t\t`
]
]);
}
function updateServiceWorker() {
replaceInFile(path.join(projectRoot, 'src', 'service-worker.ts'), [
[`shell.concat(files);`, `(shell as string[]).concat(files as string[]);`],
[`self.skipWaiting();`, `((self as any) as ServiceWorkerGlobalScope).skipWaiting();`],
[`self.clients.claim();`, `((self as any) as ServiceWorkerGlobalScope).clients.claim();`],
[`fetchAndCache(request)`, `fetchAndCache(request: Request)`],
[`self.addEventListener('activate', event =>`, `self.addEventListener('activate', (event: ExtendableEvent) =>`],
[`self.addEventListener('install', event =>`, `self.addEventListener('install', (event: ExtendableEvent) =>`],
[`addEventListener('fetch', event =>`, `addEventListener('fetch', (event: FetchEvent) =>`],
]);
}
function createTsConfig() {
const tsconfig = `{
"extends": "@tsconfig/svelte/tsconfig.json",
"compilerOptions": {
"lib": ["DOM", "ES2017", "WebWorker"]
},
"include": ["src/**/*", "src/node_modules/**/*"],
"exclude": ["node_modules/*", "__sapper__/*", "static/*"]
}`;
createFile(path.join(projectRoot, 'tsconfig.json'), tsconfig);
}
// Adds the extension recommendation
function configureVsCode() {
const dir = path.join(projectRoot, '.vscode');
if (!fs.existsSync(dir)) {
fs.mkdirSync(dir);
}
createFile(path.join(projectRoot, '.vscode', 'extensions.json'), `{"recommendations": ["svelte.svelte-vscode"]}`);
}
function deleteThisScript() {
fs.unlinkSync(path.join(__filename));
// Check for Mac's DS_store file, and if it's the only one left remove it
const remainingFiles = fs.readdirSync(path.join(__dirname));
if (remainingFiles.length === 1 && remainingFiles[0] === '.DS_store') {
fs.unlinkSync(path.join(__dirname, '.DS_store'));
}
// Check if the scripts folder is empty
if (fs.readdirSync(path.join(__dirname)).length === 0) {
// Remove the scripts folder
fs.rmdirSync(path.join(__dirname));
}
}
console.log(`Adding TypeScript with ${isRollup ? "Rollup" : "webpack" }...`);
addDepsToPackageJson();
changeJsExtensionToTs(path.join(projectRoot, 'src'));
updateSvelteFiles();
if (isRollup) {
updateRollupConfig();
} else {
updateWebpackConfig();
}
updateServiceWorker();
createTsConfig();
configureVsCode();
// Delete this script, but not during testing
if (!argv[2]) {
deleteThisScript();
}
console.log('Converted to TypeScript.');
if (fs.existsSync(path.join(projectRoot, 'node_modules'))) {
console.log(`
Next:
1. run 'npm install' again to install TypeScript dependencies
2. run 'npm run build' for the @sapper imports in your project to work
`);
}