angular-docs-cn/integration/cli-hello-world-lazy/check-output-for-ngdevmode.js

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const fs = require('fs');
const path = require('path');
const distPath = './dist/';
const ngDevModeVariable = 'ngDevMode';
const filesWithNgDevMode = fs.readdirSync(distPath)
.filter(p => p.endsWith('.js'))
.filter(p => fs.readFileSync(path.join(distPath, p), 'utf-8').includes(ngDevModeVariable));
if (filesWithNgDevMode.length > 0) {
throw new Error(`Found '${ngDevModeVariable}' referenced in ${filesWithNgDevMode}. These references should be tree-shaken away!`);
} else {
console.log(`No '${ngDevModeVariable}' references found in ${distPath}`)
}