function findRushJsonFolder()

in common/scripts/install-run.js [268:287]

• 20 lines of code
• 5 McCabe index (conditional complexity)

function findRushJsonFolder() {
    if (!_rushJsonFolder) {
        let basePath = __dirname;
        let tempPath = __dirname;
        do {
            const testRushJsonPath = path.join(basePath, exports.RUSH_JSON_FILENAME);
            if (fs.existsSync(testRushJsonPath)) {
                _rushJsonFolder = basePath;
                break;
            }
            else {
                basePath = tempPath;
            }
        } while (basePath !== (tempPath = path.dirname(basePath))); // Exit the loop when we hit the disk root
        if (!_rushJsonFolder) {
            throw new Error('Unable to find rush.json.');
        }
    }
    return _rushJsonFolder;
}