ci.yml

name: "CI"

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


jobs:

  envs:
    name: "Find environments"
    runs-on: "ubuntu-latest"

    outputs:
      envs_test: "${{ steps.envs.outputs.envs_test }}"
      envs_push: "${{ steps.envs.outputs.envs_push }}"

    steps:
      - name: "Checkout"
        uses: "actions/checkout@v4"
        with:
          fetch-depth: 5
          ref: ${{ github.head_ref }}

      - name: "Find environment"
        id: "envs"
        run: |
          envs_test="["
          envs_push="["

          update_all=
          if git diff --name-only HEAD~1 HEAD -- | grep -E "flake.nix|flake.lock|.github" ; then
            echo detected major change
            update_all=true
          fi

          while IFS= read manifest_path; do
            env_path=$(realpath -s $(dirname $manifest_path)/../..)
            rel_env_path="${env_path#$PWD/}"
            if [ -f "$env_path/test.sh" ]; then
              name=$(basename $env_path)

              if [ "$update_all" != "true" ] && ( git diff --name-only HEAD~1 HEAD | grep -qv "$rel_env_path/" ; ) ; then
                continue
              fi

              num_of_services=$(yq -oy '.services | length' $manifest_path)
              start_services="true"
              if [ "$num_of_services" -eq 0 ]; then
                start_services="false"
              fi

              readarray systems < <(yq e -o=j -I=0 '.options.systems[]' $manifest_path)
              comma_test=""
              if [ "$envs_test" != "[" ]; then comma_test=","; fi
              for system in "${systems[@]}"; do
                system=$(echo $system | xargs)
                envs_test="$envs_test$comma_test{\"example\":\"$name\",\"system\":\"$system\",\"start_services\":$start_services}"
                comma_test=","
              done

              comma_push=""
              if [ "$envs_push" != "[" ]; then comma_push=","; fi
              envs_push="$envs_push$comma_push{\"example\":\"$name\"}"
            fi
          done <<< "$(find $PWD -name manifest.toml)"
          envs_test="$envs_test]"
          envs_push="$envs_push]"

          echo "-- ENVS_TEST ---------------"
          echo "$envs_test" | jq
          echo "----------------------------"

          echo "-- ENVS_PUSH ---------------"
          echo "$envs_push" | jq
          echo "----------------------------"

          echo "envs_test=$envs_test" >> "$GITHUB_OUTPUT"
          echo "envs_push=$envs_push" >> "$GITHUB_OUTPUT"

  test:
    name: "Test '${{ matrix.example }}' example on '${{ matrix.system }}'"
    runs-on: "ubuntu-latest"

    needs:
      - "envs"

    strategy:
      fail-fast: false
      matrix:
        include: ${{ fromJSON(needs.envs.outputs.envs_test ) }}

    steps:
      - name: "Setup SSH"
        uses: "webfactory/ssh-agent@v0.9.0"
        with:
          ssh-private-key: "${{ secrets.MANAGED_FLOXBOT_SSH_KEY }}"

      - name: "Setup Tailscale"
        uses: "tailscale/github-action@v2"
        with:
          args: "--timeout 30s --login-server ${{ vars.MANAGED_TAILSCALE_URL }}"
          tags: "tag:ci"
          authkey: "${{ secrets.MANAGED_TAILSCALE_AUTH_KEY }}"

      - name: "Find remote server to run tests on"
        run: |
          set -eo pipefail
          echo "${{ vars.MANAGED_REMOTE_BUILDERS }}" > machines
          export REMOTE_SERVER=$(cat machines | grep ${{ matrix.system }} | cut -f1 -d' ' | cut -f3 -d'/' | head -1 | sed 's/nixbld@//' ; )
          export REMOTE_SERVER_USER_KNOWN_HOSTS_FILE=$(mktemp)
          export REMOTE_PUBLIC_HOST_KEY=$(cat machines | grep ${{ matrix.system }} | tr -s ' ' | cut -f8 -d' ' | base64 -d ; )
          printf "%s %s\n" "$REMOTE_SERVER" "$REMOTE_PUBLIC_HOST_KEY" > "$REMOTE_SERVER_USER_KNOWN_HOSTS_FILE"
          echo "REMOTE_SERVER: $REMOTE_SERVER"
          echo "REMOTE_SERVER_USER_KNOWN_HOSTS_FILE: $REMOTE_SERVER_USER_KNOWN_HOSTS_FILE"
          cat $REMOTE_SERVER_USER_KNOWN_HOSTS_FILE
          echo "REMOTE_SERVER=$REMOTE_SERVER" >> $GITHUB_ENV
          echo "REMOTE_SERVER_USER_KNOWN_HOSTS_FILE=$REMOTE_SERVER_USER_KNOWN_HOSTS_FILE" >> $GITHUB_ENV

      - name: "Test environment"
        run: |
          ssh github@$REMOTE_SERVER \
            -oUserKnownHostsFile=$REMOTE_SERVER_USER_KNOWN_HOSTS_FILE \
            nix run \
                --accept-flake-config \
                --extra-experimental-features '"nix-command flakes"' \
                --option access-tokens "github.com=${{ secrets.MANAGED_FLOXBOT_GITHUB_ACCESS_TOKEN_REPO_SCOPE }}" \
                github:flox/floxenvs/${{ github.sha }}#apps.${{ matrix.system }}.test-${{ matrix.example }} -- ${{ matrix.start_services }}

  push:
    name: "Sync '${{ matrix.example }}' manifest"
    runs-on: "ubuntu-latest"

    if: (github.event_name == 'push' && github.ref_name == 'main') || github.event_name == 'workflow_dispatch' || github.event_name == 'schedule'

    needs:
      - "envs"
      - "test"

    env:
      FLOX_BIN:           "flox -vvv"
      FLOX_REMOTE_OWNER:  "flox"
      FLOX_AUTH0_URL:     "https://auth.flox.dev"

    strategy:
      matrix:
        include: ${{ fromJSON(needs.envs.outputs.envs_push ) }}

    steps:
      - name: "Checkout"
        uses: "actions/checkout@v4"

      - name: "Install flox"
        uses: "flox/install-flox-action@main"

      - name: "Get FloxHub token"
        run: |
          echo "FLOX_FLOXHUB_TOKEN=$(
            curl --request POST \
              --url $FLOX_AUTH0_URL/oauth/token \
              --header 'content-type: application/x-www-form-urlencoded' \
              --data "client_id=${{ secrets.MANAGED_FLOXENVS_AUTH0_CLIENT_ID }}" \
              --data "audience=https://hub.flox.dev/api" \
              --data "grant_type=client_credentials" \
              --data "client_secret=${{ secrets.MANAGED_FLOXENVS_AUTH0_CLIENT_SECRET }}" \
                | jq .access_token -r)" >> $GITHUB_ENV

      - name: "Pull or Create remote environment"
        run: |
          pushd ./${{ matrix.example }}
          if flox list --config --remote "$FLOX_REMOTE_OWNER/${{ matrix.example }}" >/dev/null; then
            $FLOX_BIN pull --remote "$FLOX_REMOTE_OWNER/${{ matrix.example }}" --dir "remote"
          else
            echo "WARN: No environment $FLOX_REMOTE_OWNER/${{ matrix.example }} found on FloxHub"
            echo "WARN: Creating a new environment ${{ matrix.example }}"
            $FLOX_BIN init --name ${{ matrix.example }} --dir "remote"
            $FLOX_BIN push --dir "remote"
          fi
          popd

      - name: "Sync to remote environment"
        run: |
          pushd ./${{ matrix.example }}
          cp -rf .flox/env/* remote/.flox/env/
          $FLOX_BIN edit --sync --dir "remote"
          popd

      - name: "Push to remote environment"
        run: |
          pushd ./${{ matrix.example }}
          $FLOX_BIN push --dir "remote"
          popd


  report-failure:
    name: "Report Failure"
    runs-on: "ubuntu-latest"

    if: ${{ failure() && github.ref == 'refs/heads/main' && (github.event_name == 'push' || github.event_name == 'schedule') }}

    needs:
      - "test"
      - "push"

    steps:
      - name: "Slack Notification"
        uses: "rtCamp/action-slack-notify@v2"
        env:
          SLACK_TITLE:      "Something broke CI for floxenvs"
          SLACK_FOOTER:     "Thank you for caring"
          SLACK_WEBHOOK:    "${{ secrets.MANAGED_SLACK_WEBHOOK }}"
          SLACK_USERNAME:   "GitHub"
          SLACK_ICON_EMOJI: ":poop:"
          SLACK_COLOR:      "#ff2800"  # ferrari red -> https://encycolorpedia.com/ff2800
          SLACK_LINK_NAMES: true