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config.js
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config.js
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'use strict';
const fs = require('fs');
const mime = require('mime');
const path = require('path');
const rimraf = require('rimraf');
const send = require('send');
const JS_MIME_TYPES = {
'application/javascript': ['js', 'jsx', 'ts', 'tsx']
};
const TESTING = process.env.NODE_ENV === 'test';
// Prevent parallel test runs from reading from same cache
const DIR = `.dvlp${TESTING ? process.getuid() : ''}`;
const VERSION = process.env.DVLP_VERSION;
const bundleDirName = `${path.join(DIR, `bundle-${VERSION}`)}`;
const bundleDir = path.resolve(bundleDirName);
const maxModuleBundlerWorkers = parseInt(process.env.BUNDLE_WORKERS, 10) || 0;
const port = process.env.PORT ? Number(process.env.PORT) : 8080;
mime.define(JS_MIME_TYPES, true);
send.mime.define(JS_MIME_TYPES, true);
const dir = path.resolve(DIR);
// Work around rollup-plugin-commonjs require.main.filename
if (TESTING || process.env.DVLP_LAUNCHER === 'cmd') {
const bundleDirExists = fs.existsSync(bundleDir);
const dirExists = fs.existsSync(dir);
const rm = dirExists && !bundleDirExists;
if (rm) {
const contents = fs.readdirSync(dir).map((item) => path.resolve(dir, item));
for (const item of contents) {
// Delete all subdirectories
if (fs.statSync(item).isDirectory()) {
rimraf.sync(item);
}
}
}
if (!dirExists) {
fs.mkdirSync(dir);
}
if (!bundleDirExists) {
fs.mkdirSync(bundleDir);
}
if (TESTING) {
process.on('exit', () => {
rimraf.sync(dir);
});
}
}
/**
* @typedef { object } Config
* @property { number } activePort,
* @property { string } bundleDir,
* @property { string } bundleDirName,
* @property { Array<string> } directories,
* @property { object } extensionsByType,
* @property { Array<string> } extensionsByType.css,
* @property { Array<string> } extensionsByType.html,
* @property { Array<string> } extensionsByType.js,
* @property { number } latency,
* @property { string } maxAge,
* @property { number } maxModuleBundlerWorkers,
* @property { number } port,
* @property { string } testing,
* @property { object } typesByExtension,
*/
module.exports = {
activePort: port,
bundleDir,
bundleDirName,
directories: [],
// Ordered to trigger transpiling if necessary
extensionsByType: {
css: ['.sass', '.scss', '.less', '.styl', '.stylus', '.css'],
html: [
'.nunjs',
'.nunjucks',
'.hbs',
'.handlebars',
'.dust',
'.html',
'.htm'
],
js: ['.ts', '.tsx', '.mjs', '.jsx', '.js', '.json']
},
latency: 50,
maxAge: '10m',
maxModuleBundlerWorkers,
port,
rollupConfigPath: path.join(dir, 'rollup.config.js'),
testing: TESTING,
typesByExtension: {
'.css': 'css',
'.sass': 'css',
'.scss': 'css',
'.less': 'css',
'.styl': 'css',
'.stylus': 'css',
'.html': 'html',
'.htm': 'html',
'.nunjs': 'html',
'.nunjucks': 'html',
'.hbs': 'html',
'.handlebars': 'html',
'.dust': 'html',
'.js': 'js',
'.mjs': 'js',
'.json': 'js',
'.jsx': 'js',
'.ts': 'js',
'.tsx': 'js'
}
};