Git commit logs can be tedious to write...

but are useful for long term maintenance and code audit.

Turns out that GPT4 is fantastic for generating git logs from git diffs, making the process a breeze.

The following shell script gets staged code and generates a diff and calls the GTP4 api to write a git log:

#!/bin/bash

diff_content="Write a commit message in the style of conventional commits specification, using bullet points, for the following: \n $(git --no-pager diff --cached)"

echo $diff_content

payload=$(jq -nc --arg content "$diff_content" '{
    "model": "gpt-4",
    "messages": [
        {"role": "system", "content": "You are ChatGPT, a large language model trained by OpenAI. Carefully heed the users instructions Respond using Markdown."},
        {
            "role": "user",
            "content": $content
        }
    ],
   "temperature": 1
}')

# Pass the payload to the OpenAI API chat completions endpoint
response=$(curl -s -X POST https://api.openai.com/v1/chat/completions \
    -H "Content-Type: application/json" \
    -H "Authorization: Bearer $OPENAI_API_KEY" \
    --data "$payload")

echo $response | jq -r '.choices[0].message.content'

Save the file somewhere locally, e.g ~/git_diff_to_gpt4.sh, and set it to executable chmod +x ~/git_diff_to_gpt4.sh. Then add to either your .zshrc or .bashrc, an alias and the openai api key as an environmental variable, i.e.

export OPENAI_API_KEY="YOUR_OPENAI_API_KEY"
alias gdiffgpt4='~/git_diff_to_gpt4.sh'

Then, either restart the shell or reload it (e.g. 'source ~/.zshrc'), stage your code and run the shell alias i.e.

git add .
gdiffgpt4

Note, this sends your git diff to OpenAI, and should not used for proprietary codebases without permission. It should be possible to modify this code to us a locally hosted LLM such as LLAMA2 or CodeLLAMA.