# Run backward compatibility tests
name: Backward compatibility Tests on CPU

env:
  CARGO_TERM_COLOR: always
  ACTION_RUN_URL: ${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}
  RUSTFLAGS: "-C target-cpu=native"
  RUST_BACKTRACE: "full"
  RUST_MIN_STACK: "8388608"
  SLACK_CHANNEL: ${{ secrets.SLACK_CHANNEL }}
  SLACK_ICON: https://pbs.twimg.com/profile_images/1274014582265298945/OjBKP9kn_400x400.png
  SLACK_USERNAME: ${{ secrets.BOT_USERNAME }}
  SLACK_WEBHOOK: ${{ secrets.SLACK_WEBHOOK }}
  SLACKIFY_MARKDOWN: true
  PULL_REQUEST_MD_LINK: ""
  CHECKOUT_TOKEN: ${{ secrets.REPO_CHECKOUT_TOKEN || secrets.GITHUB_TOKEN }}
  # Secrets will be available only to zama-ai organization members
  SECRETS_AVAILABLE: ${{ secrets.JOB_SECRET != '' }}
  EXTERNAL_CONTRIBUTION_RUNNER: "large_ubuntu_16"

on:
  # Allows you to run this workflow manually from the Actions tab as an alternative.
  workflow_dispatch:
  pull_request:

permissions:
  contents: read

jobs:
  setup-instance:
    name: Setup instance (backward-compat-tests)
    runs-on: ubuntu-latest
    outputs:
      runner-name: ${{ steps.start-remote-instance.outputs.label || steps.start-github-instance.outputs.runner_group }}
    steps:
      - name: Start remote instance
        id: start-remote-instance
        if: env.SECRETS_AVAILABLE == 'true'
        uses: zama-ai/slab-github-runner@79939325c3c429837c10d6041e4fd8589d328bac
        with:
          mode: start
          github-token: ${{ secrets.SLAB_ACTION_TOKEN }}
          slab-url: ${{ secrets.SLAB_BASE_URL }}
          job-secret: ${{ secrets.JOB_SECRET }}
          backend: aws
          profile: cpu-small

      # This instance will be spawned especially for pull-request from forked repository
      - name: Start GitHub instance
        id: start-github-instance
        if: env.SECRETS_AVAILABLE == 'false'
        run: |
          echo "runner_group=${EXTERNAL_CONTRIBUTION_RUNNER}" >> "$GITHUB_OUTPUT"

  backward-compat-tests:
    name: Backward compatibility tests
    needs: [ setup-instance ]
    concurrency:
      group: ${{ github.workflow_ref }}
      cancel-in-progress: true
    runs-on: ${{ needs.setup-instance.outputs.runner-name }}
    steps:
      - name: Checkout tfhe-rs
        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683
        with:
          persist-credentials: 'false'
          token: ${{ env.CHECKOUT_TOKEN }}

      - name: Install latest stable
        uses: dtolnay/rust-toolchain@b3b07ba8b418998c39fb20f53e8b695cdcc8de1b # zizmor: ignore[stale-action-refs] this action doesn't create releases
        with:
          toolchain: stable

      # Cache key is an aggregated hash of lfs files hashes
      - name: Get LFS data sha
        id: hash-lfs-data
        run: |
          SHA=$(git lfs ls-files -l -I utils/tfhe-backward-compat-data | sha256sum | cut -d' ' -f1)
          echo "sha=${SHA}" >> "${GITHUB_OUTPUT}"

      - name: Retrieve data from cache
        id: retrieve-data-cache
        uses: actions/cache/restore@5a3ec84eff668545956fd18022155c47e93e2684 #v4.2.3
        with:
          path: |
            utils/tfhe-backward-compat-data/**/*.cbor
            utils/tfhe-backward-compat-data/**/*.bcode
          key: ${{ steps.hash-lfs-data.outputs.sha }}

      - name: Pull test data
        if: steps.retrieve-data-cache.outputs.cache-hit != 'true'
        run: |
          make pull_backward_compat_data

      - name: Run backward compatibility tests
        run: |
          make test_backward_compatibility_ci

      - name: Store data in cache
        if: steps.retrieve-data-cache.outputs.cache-hit != 'true'
        continue-on-error: true
        uses: actions/cache/save@5a3ec84eff668545956fd18022155c47e93e2684 #v4.2.3
        with:
          path: |
            utils/tfhe-backward-compat-data/**/*.cbor
            utils/tfhe-backward-compat-data/**/*.bcode
          key: ${{ steps.hash-lfs-data.outputs.sha }}

      - name: Set pull-request URL
        if: ${{ failure() && github.event_name == 'pull_request' }}
        run: |
          echo "PULL_REQUEST_MD_LINK=[pull-request](${PR_BASE_URL}${PR_NUMBER}), "  >> "${GITHUB_ENV}"
        env:
          PR_BASE_URL: ${{ vars.PR_BASE_URL }}
          PR_NUMBER: ${{ github.event.pull_request.number }}

      - name: Slack Notification
        if: ${{ failure() || (cancelled() && github.event_name != 'pull_request') }}
        continue-on-error: true
        uses: rtCamp/action-slack-notify@e31e87e03dd19038e411e38ae27cbad084a90661
        env:
          SLACK_COLOR: ${{ job.status }}
          SLACK_MESSAGE: "Backward compatibility tests finished with status: ${{ job.status }}. (${{ env.PULL_REQUEST_MD_LINK }}[action run](${{ env.ACTION_RUN_URL }}))"

  teardown-instance:
    name: Teardown instance (backward-compat-tests)
    if: ${{ always() && needs.setup-instance.result == 'success' }}
    needs: [ setup-instance, backward-compat-tests ]
    runs-on: ubuntu-latest
    steps:
      - name: Stop remote instance
        id: stop-instance
        if: env.SECRETS_AVAILABLE == 'true'
        uses: zama-ai/slab-github-runner@79939325c3c429837c10d6041e4fd8589d328bac
        with:
          mode: stop
          github-token: ${{ secrets.SLAB_ACTION_TOKEN }}
          slab-url: ${{ secrets.SLAB_BASE_URL }}
          job-secret: ${{ secrets.JOB_SECRET }}
          label: ${{ needs.setup-instance.outputs.runner-name }}

      - name: Slack Notification
        if: ${{ failure() }}
        continue-on-error: true
        uses: rtCamp/action-slack-notify@e31e87e03dd19038e411e38ae27cbad084a90661
        env:
          SLACK_COLOR: ${{ job.status }}
          SLACK_MESSAGE: "Instance teardown (backward-compat-tests) finished with status: ${{ job.status }}. (${{ env.ACTION_RUN_URL }})"