In this stage, you’ll implement the git init command. You’ll initialize a git repository by creating a .git directory and some files inside it.

In this stage, you’ll read a blob from your git repository by fetching its contents from the .git/objects directory.

You’ll do this using the first of multiple “plumbing” commands we’ll encounter in this challenge: git cat-file.

In the previous stage, we learnt how to read a blob. In this stage, we’ll persist a blob by implementing the git hash-object command.

Now that we’ve learnt how to read/write blobs, let’s move onto our next Git object: the tree. In this stage, you’ll read a tree object from storage by implementing the git ls-tree command.

In this stage, you’ll write a tree to git storage by implementing the git write-tree command.

To keep things simple, we won’t implement an index, we’ll just assume that all changes in the worktree are staged.

Let’s move on to the last git object we’ll be dealing with in this challenge: the commit. In this stage, you’ll create a commit by implementing the git commit-tree command.

This is the last stage of the challenge, and probably the hardest! In this stage, you’ll clone a public repository from GitHub. To do this, you’ll use one of Git’s Transfer protocols.