label-epic-task.yml

name: Label Child Issues

on:
  issues:
    types: [opened, edited]

jobs:
  label_child_issues:
    runs-on: ubuntu-latest
    steps:
      - name: Fetch Linked Issues
        id: get_linked_issues
        run: |
          linked_issues=$(curl -s -H "Authorization: token ${{ secrets.GITHUB_TOKEN }}" \
            -H "Accept: application/vnd.github.v3+json" \
            https://api.github.com/repos/${{ github.repository }}/issues/${{ github.event.issue.number }}/timeline \
            | jq -r '.[] | select(.event == "cross-referenced") | .source.issue.number')

          echo "Linked Issues: $linked_issues"

          # Assuming there's only one linked parent issue
          echo "PARENT_ISSUE=$(echo $linked_issues | head -n 1)" >> $GITHUB_ENV

      - name: Get Labels from Parent Issue
        id: get_labels
        if: env.PARENT_ISSUE
        run: |
          labels=$(curl -s -H "Authorization: token ${{ secrets.GITHUB_TOKEN }}" \
            -H "Accept: application/vnd.github.v3+json" \
            https://api.github.com/repos/${{ github.repository }}/issues/${PARENT_ISSUE} \
            | jq -r '.labels[] | select(.name != "epic") | .name')

          # Format labels into a newline-separated string, required by action-add-labels
          formatted_labels=$(echo "$labels" | tr '\n' '\n')
          echo "LABELS=$formatted_labels" >> $GITHUB_ENV

      - name: Append epic-task Label
        id: append_epic_task
        if: env.PARENT_ISSUE
        run: |
          echo -e "${{ env.LABELS }}\nepic-task" > final_labels.txt

      - name: Apply Labels to Child Issue
        if: env.PARENT_ISSUE
        uses: actions-ecosystem/action-add-labels@v1
        with:
          github_token: ${{ secrets.GITHUB_TOKEN }}
          labels: |
            $(cat final_labels.txt)