name: auto-update-jenkins-lts

on:
  schedule:
    - cron: '0 7 * * 0'
  workflow_dispatch:

permissions:
  contents: write
  pull-requests: write

jobs:
  check-and-update-jenkins-lts:
    runs-on: ubuntu-latest
    steps:
      - name: Check out code
        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5

      - name: Set up env vars
        run: |
          echo "GO111MODULE=on" >> $GITHUB_ENV
          echo "GO_VERSION=v$(sed -n 's/GO_VERSION=//p' config.base.env | tr -d '\n' | tr -d '"')" >> $GITHUB_ENV
          echo "KIND_CLUSTER_NAME=$(sed -n 's/KIND_CLUSTER_NAME=//p' config.base.env | tr -d '\n' | tr -d '"')" >> $GITHUB_ENV
          echo "GOPATH=/home/runner/go" >> $GITHUB_ENV

      - name: Check if update needed
        id: check
        run: |
          CURRENT=$(sed -n 's/LATEST_LTS_VERSION=//p' config.base.env | tr -d '\n' | tr -d '"')
          LATEST=$(curl -s https://www.jenkins.io/changelog-stable/ | grep -oP 'changelog/\K\d+\.\d+\.\d+' | head -1)

          echo "current=$CURRENT" >> $GITHUB_OUTPUT
          echo "latest=$LATEST" >> $GITHUB_OUTPUT

          if [ "$CURRENT" != "$LATEST" ]; then
            echo "needs_update=true" >> $GITHUB_OUTPUT
          else
            echo "needs_update=false" >> $GITHUB_OUTPUT
          fi

      - name: Prepare go environment
        if: steps.check.outputs.needs_update == 'true'
        uses: actions/setup-go@44694675825211faa026b3c33043df3e48a5fa00 # v6
        with:
          go-version: ${{ env.GO_VERSION }}

      - name: Ensure Golang runtime dependencies
        if: steps.check.outputs.needs_update == 'true'
        run: make go-dependencies

      - name: Update Jenkins lts version
        if: steps.check.outputs.needs_update == 'true'
        run: make update-jenkins-lts

      - name: Update Jenkins base plugins
        if: steps.check.outputs.needs_update == 'true'
        run: make update-plugins

      - name: Run verify
        if: steps.check.outputs.needs_update == 'true'
        run: make verify

      - name: Create Pull Request
        if: steps.check.outputs.needs_update == 'true'
        uses: peter-evans/create-pull-request@271a8d0340265f705b14b6d32b9829c1cb33d45e # v7.0.8
        with:
          token: ${{ secrets.GITHUB_TOKEN }}
          commit-message: "chore: update Jenkins lts version to ${{ steps.check.outputs.latest }}"
          title: "chore: update Jenkins lts version to ${{ steps.check.outputs.latest }}"
          body: "auto-update Jenkins lts version from ${{ steps.check.outputs.current }} to ${{ steps.check.outputs.latest }}"
          branch: auto-update-jenkins-lts-${{ steps.check.outputs.latest }}
          delete-branch: true