openai-review.yml

name: PR Review with OpenAI

on:
  pull_request:
    types: [opened, synchronize, reopened]

permissions:
  pull-requests: write
  issues: write

jobs:
  review:
    runs-on: ubuntu-latest

    steps:
    - name: Checkout code
      uses: actions/checkout@v3
      with:
        repository: 'alefinvest/CTO'
        ref: ${{ github.event.pull_request.head.ref }}
        token: ${{ secrets.TOKEN }}

    - name: Fetch the pull request ref and default branch
      run: |
        git fetch origin +refs/pull/${{ github.event.pull_request.number }}/merge:pr-merge
        git fetch origin ${{ github.event.repository.default_branch }}:${{ github.event.repository.default_branch }}

    - name: Ensure we're on the PR merge commit
      run: git checkout pr-merge

    - name: Get PR Diff (Limit to Specific File Types)
      run: git diff ${{ github.event.repository.default_branch }} pr-merge > diff.txt

    - name: Split Diff into Chunks
      run: |
        split -l 500 diff.txt diff_chunk_

    - name: Send Diff Chunks to OpenAI
      run: |
        for chunk in diff_chunk_*; do
          DIFF_CONTENT=$(cat $chunk)
          PROMPT="You are a Blockchain Ethereum and Ton protocol seniour develooper as well as NextJs and Python senior developer reviewing a pull request. The following diff shows lines that have been added or removed as well as context:\n\n${DIFF_CONTENT}\n\nPlease review the changes and provide any recommended improvements or point out specific issues. Focus your feedback on the lines that have been added or removed."
          
          ESCAPED_PROMPT=$(echo "$PROMPT" | jq -Rs .)

          RESPONSE=$(curl https://api.openai.com/v1/chat/completions \
            -H "Content-Type: application/json" \
            -H "Authorization: Bearer ${{ secrets.OPENAI_API_KEY }}" \
            -d "{
              \"model\": \"gpt-4o-mini\",
              \"messages\": [{
                \"role\": \"user\",
                \"content\": $ESCAPED_PROMPT
              }],
              \"max_tokens\": 500
            }")
          echo "$RESPONSE" >> responses.txt
        done

    - name: Parse OpenAI Response
      id: parse_response
      run: |
        REVIEW=$(cat responses.txt | jq -r '.choices[0].message.content')
        echo "review<<EOF" >> $GITHUB_OUTPUT
        echo "$REVIEW" >> $GITHUB_OUTPUT
        echo "EOF" >> $GITHUB_OUTPUT

    - name: Create comment
      uses: peter-evans/create-or-update-comment@v3
      with:
        token: ${{ secrets.TOKEN }}
        issue-number: ${{ github.event.pull_request.number }}
        body: |
          OpenAI Review Result:

          ${{ steps.parse_response.outputs.review }}