update_version.yaml

name: Create PRs for new CoreDNS versions

on:
  workflow_dispatch:
  schedule:
    - cron: "0 10 * * *"
  pull_request:
    branches:
      - main

jobs:
  generator:
    name: Generate Step for new CoreDNS versions
    runs-on: ubuntu-latest
    outputs:
      tags: ${{ steps.fetch-upstream.outputs.tags }}
    steps:
      - name: Prepare environment
        run: |
          export DEBIAN_FRONTEND=noninteractive
          sudo apt-get -qq update
          sudo apt-get -qq install -y jq
          sudo snap install yq

      - name: Checkout rock repository
        uses: actions/checkout@v4
        with:
          path: coredns-rock
          ref: ${{ github.head_ref || 'main' }}

      - name: Checkout coredns repository
        uses: actions/checkout@v4
        with:
          repository: coredns/coredns
          path: coredns
          fetch-tags: true
          fetch-depth: 0

      - name: Itemize all releases
        id: releases
        run: |
          rm -rf versions.txt
          for rockcraft in $(find coredns-rock -name 'rockcraft.yaml'); do
            echo $(yq '.version' $rockcraft) >> versions.txt
          done
          
      - name: Craft from Upstream tags
        id: fetch-upstream
        run: |
          current_releases=( $(sort -V versions.txt) )
          min_tag="v${current_releases[0]}"
          coredns_tags=( $(git -C coredns tag --sort=v:refname | sed -n '/'${min_tag}'/,$p') )
          new_tags=()

          for coredns_tag in "${coredns_tags[@]}"
          do
             if [[ ! -e coredns-rock/${coredns_tag:1}/rockcraft.yaml ]]; then
               new_tag=${coredns_tag:1}
               new_tags+=($new_tag)
               tag=${new_tag} envsubst < coredns-rock/template/rockcraft.yaml > coredns-rock/${new_tag}/rockcraft.yaml
             fi
          done

          if [ ${#new_tags[@]} -eq 0 ]; then
              tags='[]'
          else
              tags=$(printf '%s\n' "${new_tags[@]}" | jq -R . | jq --compact-output -s .)
          fi

          echo $tags
          echo "tags=$tags" >> $GITHUB_OUTPUT

      - name: Commit and push new rockcraft.yaml
        id: commit-rockcraft
        if: ${{ steps.fetch-upstream.outputs.tags != '[]' }}
        uses: peter-evans/create-pull-request@v7
        with:
          commit-message: Update CoreDNS versions with ${{ join(fromJSON(steps.fetch-upstream.outputs.tags), ', ') }}
          title: "Update CoreDNS versions"
          body: Update CoreDNS versions with ${{ join(fromJSON(steps.fetch-upstream.outputs.tags), ', ') }}
          branch: autoupdate/sync/coredns
          delete-branch: true
          base: main