function getNpmPath()

in common/scripts/install-run.js [149:174]

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

function getNpmPath() {
    if (!_npmPath) {
        try {
            if (os.platform() === 'win32') {
                // We're on Windows
                const whereOutput = childProcess.execSync('where npm', { stdio: [] }).toString();
                const lines = whereOutput.split(os.EOL).filter((line) => !!line);
                // take the last result, we are looking for a .cmd command
                // see https://github.com/microsoft/rushstack/issues/759
                _npmPath = lines[lines.length - 1];
            }
            else {
                // We aren't on Windows - assume we're on *NIX or Darwin
                _npmPath = childProcess.execSync('command -v npm', { stdio: [] }).toString();
            }
        }
        catch (e) {
            throw new Error(`Unable to determine the path to the NPM tool: ${e}`);
        }
        _npmPath = _npmPath.trim();
        if (!fs.existsSync(_npmPath)) {
            throw new Error('The NPM executable does not exist');
        }
    }
    return _npmPath;
}