auto-pull-request.yml

name: Auto Create Pull Request

on:
  push:
    branches:
      - 'feat/#*'
      - 'refactor/#*'
      - 'fix/#*'

jobs:
  auto-pull-request:
    runs-on: ubuntu-latest

    steps:
      - name: Checkout code
        uses: actions/checkout@v4

      - name: Extract Branch Prefix, Issue Number
        id: extract
        run: |
          branch_name="${GITHUB_REF#refs/heads/}"
          echo "BRANCH_NAME=$branch_name" >> $GITHUB_ENV
          
          if [[ "$branch_name" =~ ^(feat|fix|refactor)/#([0-9]+)$ ]]; then
            branch_prefix="${BASH_REMATCH[1]}"
            issue_number="${BASH_REMATCH[2]}"
            echo "BRANCH_PREFIX=$branch_prefix" >> $GITHUB_ENV
            echo "ISSUE_NUMBER=$issue_number" >> $GITHUB_ENV
          else
            exit 0
          fi

      - name: Check for Already Exist
        id: check_pr
        run: |
          branch_name=${{ env.BRANCH_NAME }}
          existing_pr=$(gh pr list --state open -H "$branch_name" -B develop --json number -q '.[] | .number')
          
          if [ -n "$existing_pr" ]; then
            echo "EXISTED=TRUE" >> $GITHUB_ENV
            echo "Alreadt Exist in https://github.com/${{ github.repository }}/pull/$existing_pr"
            exit 0
          fi
        env:
          GH_TOKEN: ${{ github.token }}

      - name: Fetch Issue Detail
        if: ${{ !env.EXISTED }}
        run: |
          issue_number="${{ env.ISSUE_NUMBER }}"
          
          response=$(curl -s -H "Authorization: token ${{ secrets.GITHUB_TOKEN }}" \
                            -H "Accept: application/vnd.github.v3+json" \
                            "https://api.github.com/repos/${{ github.repository }}/issues/$issue_number")
          
          assignees=$(echo "$response" | jq -r '.assignees[].login' | tr '\n' ', ' | sed 's/, $//')
          assignees=$(echo "$assignees" | rev | cut -c 2- | rev)
          
          title=$(echo "$response" | jq -r '.title')
          
          labels=$(echo "$response" | jq -r '.labels[].name' | tr '\n' ', ' | sed 's/, $//')
          labels=$(echo "$labels" | rev | cut -c 2- | rev)
          
          pr_title="${title}(#${issue_number})"
          
          echo "$response" | jq -r '.body' > issue_body.txt
          
          echo "ASSIGNEES=$assignees" >> $GITHUB_ENV
          echo "LABELS=$labels" >> $GITHUB_ENV
          echo "TITLE=$title" >> $GITHUB_ENV
          echo "PR_TITLE=$pr_title" >> $GITHUB_ENV
          echo "ISSUE_BODY_FILE=issue_body.txt" >> $GITHUB_ENV

      - name: Generate PR Body
        if: ${{ !env.EXISTED }}
        id: generate-body
        run: |
          issue_number="${{ env.ISSUE_NUMBER }}"
          
          echo "## 📌 관련 이슈" >> body.md
          echo "" >> body.md
          echo "- closed : #${issue_number} " >> body.md
          echo "" >> body.md
          echo "## ✨ PR 세부 내용" >> body.md
          echo "" >> body.md
          echo "<!-- 수정/추가한 내용을 적어주세요. -->" >> body.md
          
          summary=$(cat body.md)
          echo "PR_BODY<<EOF" >> $GITHUB_ENV
          echo "$summary" >> $GITHUB_ENV
          echo "EOF" >> $GITHUB_ENV

      - name: Create Pull Request
        if: ${{ !env.EXISTED }}
        run: |
          gh pr create --title "${{ env.PR_TITLE }}" --body "${{ env.PR_BODY }}" --base "develop" --label "${{ env.LABELS }}"
        env:
          GH_TOKEN: ${{ github.token }}