Summary - Git internals

Combine internal parts to draw an object map.

Overview of Git Internals

Git's internal structure consists of several core components working together. The .git directory contains this data; objects stores file contents and historical objects; and refs provides access to these objects through branches and tags.

.git/
├── objects/
└── refs/
    ├── heads/
    └── tags/

Understanding these components makes it easier to see how Git manages files and commit history.

Exercise Inspect a File in the Object Database

Store the contents of index.html in the Git object database and display the resulting object ID. Use the write option of the hash-object command.

Test yourself

Named references that provide access to a branch's commit ID belong to which structure?
- hooks
- refs
- Blob
- index
Show answer

refs — Refs stores named references such as branches and tags.

Complete the Git Internals Map

.git/
├── objects/
└── refs/
    ├── heads/
    └── tags/____

Show answer

.git/
├── objects/
└── refs/
    ├── heads/
    └── tags/refs

Parts of Git Internals

.git

Contains internal repository data
objects

Stores blob, tree, and commit objects
refs/heads

Points to local branches
refs/tags

Points to tags

Next lesson: Hook scripting

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