template-check.yml

# Test if the committed files match templates.
# This checks each commit sequentially, so each commit must be correct.

name: Template check
on:
  pull_request

permissions:
  contents: read
  pull-requests: write

jobs:
  infra-reload-check:
    runs-on: ubuntu-22.04
    name: Templates match results

    steps:
      - name: Clone Anaconda repository
        uses: actions/checkout@v4
        with:
          # TODO: Are we able to remove ref, fetch-depth and Rebase task? Seems that the checkout
          # without ref is doing the rebase for us.
          # otherwise we are testing target branch instead of the PR branch (see pull_request_target trigger)
          ref: ${{ github.event.pull_request.head.sha }}
          fetch-depth: 0

      - name: Rebase to current
        run: |
          git config user.name github-actions
          git config user.email github-actions@github.com
          git log --oneline -1 origin/${{ github.event.pull_request.base.ref }}
          git rebase origin/${{ github.event.pull_request.base.ref }}

      - name: Determine commits to check
        id: get_commits
        run: |
          COMMITS=$(git rev-list origin/${{ github.event.pull_request.base.ref }}..HEAD | tac)
          # rev-list provides one hash per line, starting at HEAD, adding backwards.
          # Why `tac` - commits are listed from HEAD backwards, which is reversed order, and need
          # re-applying in the correct order.
          echo -e "Commits found:\n$COMMITS"
          COMMITS_ONELINE=$(echo $COMMITS | tr '\n' ' ')
          # GH actions truncates plain multiline variables to first line when passing as output/input,
          # so make it one line on our end and save the trouble.
          echo "commits=$COMMITS_ONELINE" >> $GITHUB_OUTPUT

      - name: Check all commits
        run: |
          git checkout -b temp origin/${{ github.event.pull_request.base.ref }}
          for COMMIT in ${{ steps.get_commits.outputs.commits }} ; do
            echo "Checking $COMMIT"
            git cherry-pick "$COMMIT"
            make -f Makefile.am reload-infra
            CHANGES=$(git status -s)
            if [[ -n $CHANGES ]] ; then
              echo "Templates out of sync after commit $COMMIT:"
              git log -1 "$COMMIT"
              git status
              exit 1
            fi
          done

  infra-template-main-match-check:
    runs-on: ubuntu-22.04
    name: Compare templates files with main branch
    if: github.event.pull_request.base.ref != 'main'

    steps:
      - name: Clone Anaconda repository
        uses: actions/checkout@v3
        with:
          # TODO: Are we able to remove ref, fetch-depth and Rebase task? Seems that the checkout
          # without ref is doing the rebase for us.
          # otherwise we are testing target branch instead of the PR branch (see pull_request_target trigger)
          ref: ${{ github.event.pull_request.head.sha }}
          fetch-depth: 0

      - name: Rebase to current
        run: |
          git config user.name github-actions
          git config user.email github-actions@github.com
          git log --oneline -1 origin/${{ github.event.pull_request.base.ref }}
          git rebase origin/${{ github.event.pull_request.base.ref }}

      - name: Check if all changed template files are matching main branch
        run: |
          changed_template_files_in_pr=$(git diff --diff-filter=M --name-only origin/${{ github.event.pull_request.base.ref }} "*.j2")
          if [ -z "$changed_template_files_in_pr" ]; then
            echo "----- No template files changed -----"

            exit 0
          fi

          changed_files=$(git diff --diff-filter=M --name-only origin/main "*.j2")

          if [ -n "$changed_files" ]; then
            # print for debugging
            echo "----- Template files differ with main branch -----"
            echo "$changed_files"
            echo "-------------------------"

            exit 1
          fi