Under the Hood of Git

This tutorial is based on the Git Internals Chapter of the Official Git Book.

Learning Objectives

After doing this tutorial you will know how to

Locate the internal contents of a git repository
Explain how git uses SHA1 hashes to track content
Distinguish between the types of objects stored internally by git (blobs, trees and commits)

You will also know how to use internal git commands that do the underlying work behind the git add, git commit and git branch commands:

Add files and blobs to git’s internal object store using the hash-object command
Add files to git’s staging area using the write-tree command
Create a git commit using the commit-tree command
Create a git branch using the internal git update-ref command

Prerequisites

To do these lessons you will need to have installed

Git
A command-line terminal program
A text editor

Lessons