function downloadFile()

in common/update-cli.js [20:44]

• 24 lines of code
• 6 McCabe index (conditional complexity)

function downloadFile(url, destinationPath) {
    return new Promise((resolve, reject) => {
        const protocol = url.startsWith("https") ? https : http;

        protocol.get(url, response => {
            if (response.statusCode === 200) {
                const file = fs.createWriteStream(destinationPath);
                response.pipe(file);
                file.on("finish", () => {
                    file.close(resolve);
                });
            } else if (response.statusCode >= 300 && response.statusCode < 400 && response.headers.location) {
                downloadFile(response.headers.location, destinationPath)
                  .then(resolve)
                  .catch(reject);
            } else {
                reject(new Error(`Failed to download file. Status code: ${response.statusCode}`));
            }
        }).on("error", err => {
            fs.unlink(destinationPath, () => {
            });
            reject(err);
        });
    });
}