action-update-pr-with-jira.yml

name: Auto-fill PR with Jira info
on:
  pull_request:
    branches: [ master ]
    types: [ opened ]

permissions:
  pull-requests: write
  contents: read

jobs:
  fill-pr:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4

      - name: Extract Jira issue key from branch
        id: extract-key
        run: |
          ISSUE_KEY=$(echo "${{ github.head_ref }}" | grep -oiE '[a-z]+-[0-9]+' | head -1)
          echo "JIRA_KEY=${ISSUE_KEY^^}" >> $GITHUB_OUTPUT

      - name: Get Jira issue details
        id: jira
        if: steps.extract-key.outputs.JIRA_KEY
        env:
          JIRA_API_TOKEN: ${{ secrets.JIRA_API_TOKEN }}
          JIRA_EMAIL: ${{ secrets.JIRA_EMAIL }}
          JIRA_BASE_URL: "https://your-jira-instance.atlassian.net"
        run: |
          RESPONSE=$(curl -s -u "$JIRA_EMAIL:$JIRA_API_TOKEN" \
            "$JIRA_BASE_URL/rest/api/3/issue/${{ steps.extract-key.outputs.JIRA_KEY }}?fields=summary,description,subtasks")
          TITLE=$(echo "$RESPONSE" | jq -r '.fields.summary // "No title"')
          echo "JIRA_TITLE=$TITLE" >> $GITHUB_OUTPUT
          echo "JIRA_URL=$JIRA_BASE_URL/browse/${{ steps.extract-key.outputs.JIRA_KEY }}" >> $GITHUB_OUTPUT

      - name: Update PR description
        uses: actions/github-script@v6
        if: steps.jira.outputs.JIRA_TITLE
        with:
          script: |
            const prNumber = context.payload.pull_request.number;
            const title = `[${{ steps.extract-key.outputs.JIRA_KEY }}] ${{ steps.jira.outputs.JIRA_TITLE }}`;
            await github.rest.pulls.update({
              owner: context.repo.owner,
              repo: context.repo.repo,
              pull_number: prNumber,
              title
            });