Adding Custom Commands in Git

Git is flexible and allows you to extend its functionality. You can add your own custom commands in two main ways: aliases and custom scripts.

1. Git Aliases

Aliases are shortcuts that let you run common Git commands faster or create combinations of options.

Example: Simple Alias

git config --global alias.co checkout

Now, instead of typing:

git checkout branch-name

you can type:

git co branch-name

Example: Complex Alias

git config --global alias.hist "log --oneline --graph --decorate --all"

This creates a git hist command that shows a visual log of commits.

2. Git Custom Scripts

If you want a brand new Git command, you can create a script. Git will recognize any executable script in your PATH with the format git-<command> as a new command.

Steps to Create a Custom Command

Create a script
```
touch ~/bin/git-hello
```

Add content

#!/bin/bash
echo "Hello from custom git command!"

Make it executable
```
chmod +x ~/bin/git-hello
```
Ensure ~/bin is in your PATH

Now you can run:

git hello

And see:

Hello from custom git command!

3. Advanced Example

You can create scripts that interact directly with Git.

Undo Last Commit (but keep changes staged)

#!/bin/bash
# Save this as git-uncommit

git reset --soft HEAD~1

Usage:

git uncommit

This will remove the last commit while keeping your changes staged.

Summary

Aliases: Best for shortcuts and simple combinations of Git commands.
Scripts: Best for creating completely new commands.

By using both methods, you can make Git work exactly the way you want.