Exploring the required modules

We will use several modules to make our life easier, which are listed as follows:

• fs: This gives us access to the filesystem, and is a built-in feature of the Node.js module.

• optimist: This is a module that parses the parameters passed to our Node.js script.

• readline: This allows the reading of a stream (such as process.stdin) on a line-by-line basis. We will use it for getting input from the user while our application is still running. The module is added in Node.js by default.

• glob: This module reads a directory and returns all the existing files that match a predefined specific pattern.

• open: At some point, we will need to open a page in the user's default browser. Node.js runs on different operating systems that have different commands to open the default browser. This module helps us by providing one API.

• flapi: This is the Flickr API wrapper used to communicate with Flickr's services.

Based on the preceding list, we can write and use the following package...