Git Commit Message AI

add_to_zshrc.sh

# -----------------------------------------------------------------------------
# AI-powered Git Commit Function
# Copy paste this gist into your ~/.bashrc or ~/.zshrc to gain the `gcm` command. It:
# 1) gets the current staged changed diff
# 2) sends them to an LLM to write the git commit message
# 3) allows you to easily accept, edit, regenerate, cancel
# But - just read and edit the code however you like
# the `llm` CLI util is awesome, can get it here: https://llm.datasette.io/en/stable/

gcm() {
    # Function to generate commit message
    generate_commit_message() {
        git diff --cached | llm "
Below is a diff of all staged changes, coming from the command:

\`\`\`
git diff --cached
\`\`\`

Please generate a concise, one-line commit message for these changes."
    }

    # Function to read user input compatibly with both Bash and Zsh
    read_input() {
        if [ -n "$ZSH_VERSION" ]; then
            echo -n "$1"
            read -r REPLY
        else
            read -p "$1" -r REPLY
        fi
    }

    # Main script
    echo "Generating AI-powered commit message..."
    commit_message=$(generate_commit_message)

    while true; do
        echo -e "\nProposed commit message:"
        echo "$commit_message"

        read_input "Do you want to (a)ccept, (e)dit, (r)egenerate, or (c)ancel? "
        choice=$REPLY

        case "$choice" in
            a|A )
                if git commit -m "$commit_message"; then
                    echo "Changes committed successfully!"
                    return 0
                else
                    echo "Commit failed. Please check your changes and try again."
                    return 1
                fi
                ;;
            e|E )
                read_input "Enter your commit message: "
                commit_message=$REPLY
                if [ -n "$commit_message" ] && git commit -m "$commit_message"; then
                    echo "Changes committed successfully with your message!"
                    return 0
                else
                    echo "Commit failed. Please check your message and try again."
                    return 1
                fi
                ;;
            r|R )
                echo "Regenerating commit message..."
                commit_message=$(generate_commit_message)
                ;;
            c|C )
                echo "Commit cancelled."
                return 1
                ;;
            * )
                echo "Invalid choice. Please try again."
                ;;
        esac
    done
}

i suggest adding a parameter to bypass the ai-generated message when the user passes the -m flag

so that gcm -m 'my user-generated commit msg' allows a user to enter their own message without pinging the llm.

to do that you can add the following to line 11.

 # Check if -m flag is provided
if [ "$1" = "-m" ] && [ -n "$2" ]; then
    # Use the provided message directly
    if git commit -m "$2"; then
        echo "Changes committed successfully with your message!"
        return 0
    else
        echo "Commit failed. Please check your message and try again."
        return 1
    fi
fi

Here's a more convenient git ai copilot: https://github.com/Undertone0809/gcop

Benefits:

• Easier to use with git alias, which means just use the git command
• Compatible with all LLMs, easy to configure no matter what model you're using.
• Various git alias extensions to help you use git commands more easily.

If you're using a different model other then gpt-4o-mini, you can change the default model that llm uses with
llm models default <insert model>

I wanted to try this out with a local model so I followed the guide for setting up llama3.2 on llm:

# Install the plugin
llm install llm-ollama

# Download and run a prompt against the Orca Mini 7B model
ollama pull llama3.2:latest
llm -m llama3.2:latest 'What is the capital of France?'

and then set llama3.2 as my default:
llm models default llama3.2:latest

guys, use https://github.com/di-sukharev/opencommit, it's the most feature rich open-source tool

run npm i -g opencommit, then oco config set OCO_OPENAI_API_KEY=your_key and then sumply run oco to generate your git commit messages.

🚀🚀🚀

Awesome!!! 👍👍👍

In case anyone runs into the same error as me, you might need to unalias gcm before the gist above:

# Unalias gcm to allow for custom function
unalias gcm 2>/dev/null

For me this was set to git checkout main previously by the Oh My Zsh plugin

Oh, nice job! Thx! 👍