pr-title-changer.yml

name: Pull Request Title Modifier

on:
  pull_request:
    paths-ignore:
      - src/**
      - static/**
      - tailwind.config.*
      - package.json

env:
  PREFIX: infra

jobs:
  pr-title-modifier:
    name: PR Title Modifier
    runs-on: ubuntu-latest
    if: github.event.pull_request.user.login != 'dependabot[bot]' && github.event.pull_request.user.login != 'renovate[bot]' && github.event.pull_request.user.login != 'emeraldstudio-bot'
    permissions:
      pull-requests: write

    steps:
      - name: 📂 Checkout
        uses: actions/checkout@v4
        with:
          ref: ${{ github.event.pull_request.head.ref }}
          fetch-depth: 2

      - name: 📋 Count all changed files for this commit
        id: infra-changed-files
        run: |
          count=$(git diff --name-only HEAD^ HEAD | grep -E '.github/|.husky/|.gitignore|LICENSE|README.md' | wc -l)
          if [ $count -gt 0 ]; then
            echo "$count infrastructure files changed in the last commit"
            echo "infra_changes=true" >> $GITHUB_OUTPUT
          else
            echo "No infrastructure files changed in the last commit"
            echo "infra_changes=false" >> $GITHUB_OUTPUT
          fi

      - name: 📝 Modify PR Title
        if: steps.infra-changed-files.outputs.infra_changes == 'true'
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          current_title=$(gh pr view --json title --jq '.title')
          if [[ $current_title != "${{ env.PREFIX }}: "* ]]; then
            gh pr edit --title "${{ env.PREFIX }}: $current_title"
          fi