Generate git commit message using bash and openai api

gistfile1.txt

#!/bin/bash

# Generate patch for uncommitted changes
patch=$(git diff)
if [ -z "$patch" ]; then
  echo "No uncommitted changes found."
  exit 0
fi

# Check for the OpenAI API key
if [ -z "$OPENAI_API_KEY" ]; then
  echo "Error: Please set the OPENAI_API_KEY environment variable."
  exit 1
fi

# Check if jq is installed
if ! command -v jq &> /dev/null; then
  echo "Error: jq is not installed. Please install jq to parse JSON responses."
  exit 1
fi

# Prepare the prompt with your instructions and the git diff patch
read -r -d '' prompt <<'EOF'
You are my assistant for writing commit messages and merge request (MR) descriptions. I will provide you with a git diff patch each time, and you need to do the following:

Write a concise, professional commit message. First line should be a precise and short summary, preferably under 80 characters. A bullet list of specific changes or technical considerations from the diff should follow, each line should be prefixed with ' - ' and be less than 100 chars. Follow best commit message practices.

Instructions:

Always derive the commit message directly from the git diff patch (the actual code changes).
Consider only latest commit from the git diff patch.
Maintain a professional tone and avoid generic statements.
Be concise but provide enough detail to clarify the context of the changes.

Diff:
EOF

# Append the actual diff patch to the prompt
prompt="$prompt"$'\n'"$patch"

# Use jq to construct the JSON payload. This ensures proper escaping.
payload=$(jq -n --arg prompt "$prompt" '{
  model: "gpt-3.5-turbo",
  messages: [
    { role: "user", content: $prompt }
  ]
}')

# Send the prompt to ChatGPT using the OpenAI API and capture the response
response=$(curl -s https://api.openai.com/v1/chat/completions \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer $OPENAI_API_KEY" \
  -d "$payload")

# For debugging, uncomment the following line to see the full API response
# echo "$response" | jq .

# Extract and print only the content from the response
content=$(echo "$response" | jq -r '.choices[0].message.content')

if [ "$content" = "null" ] || [ -z "$content" ]; then
  echo "Error: Received an empty response. Full response:"
  echo "$response" | jq .
  exit 1
fi

echo "Generated Commit Message:"
echo "$content"

# Check if the current directory is part of a git repository
if git rev-parse --is-inside-work-tree > /dev/null 2>&1; then
  # Determine the correct .git directory path
  git_dir=$(git rev-parse --git-dir)
  commit_msg_path="$git_dir/COMMIT_EDITMSG"

  # Write the commit message to the COMMIT_EDITMSG file
  echo "$content" > "$commit_msg_path"
  echo "Commit message written to $commit_msg_path"
else
  echo "Not a git repository. Commit message not saved."
fi%