name: CI

on:
  push:
    branches: [ main ]
  pull_request:
    branches: [ main ]

concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true

env:
  CARGO_TERM_COLOR: always
  CARGO_NET_GIT_FETCH_WITH_CLI: "true"

jobs:
  opa-lint:
    name: Lint and test OPA policies
    runs-on: ubuntu-latest

    permissions:
      contents: read

    steps:
      - name: Checkout the code
        uses: actions/checkout@v3

      - name: Setup OPA
        uses: open-policy-agent/setup-opa@v2.0.1
        with:
          version: 0.45.0

      - name: Lint policies
        working-directory: ./policies
        run: make lint

      - name: Run OPA tests
        working-directory: ./policies
        run: make test

      - name: Run OPA tests with coverage
        working-directory: ./policies
        run: make coverage

      - name: Upload to codecov.io
        uses: codecov/codecov-action@v3
        with:
          files: policies/coverage.json
          flags: policies

  frontend-lint:
    name: Check frontend style
    runs-on: ubuntu-latest

    permissions:
      contents: read

    steps:
      - name: Checkout the code
        uses: actions/checkout@v3

      - name: Install Node
        uses: actions/setup-node@v3
        with:
          node-version: 16
          cache: 'npm'
          cache-dependency-path: frontend/package-lock.json

      - name: Install Node dependencies
        working-directory: ./frontend
        run: npm ci

      - name: Lint
        working-directory: ./frontend
        run: npm run lint


  frontend-test:
    name: Run the frontend test suite
    runs-on: ubuntu-latest

    permissions:
      contents: read

    steps:
      - name: Checkout the code
        uses: actions/checkout@v3

      - name: Install Node
        uses: actions/setup-node@v3
        with:
          node-version: 16
          cache: 'npm'
          cache-dependency-path: frontend/package-lock.json

      - name: Install Node dependencies
        working-directory: ./frontend
        run: npm ci

      - name: Test
        working-directory: ./frontend
        run: npm test

      - name: Upload to codecov.io
        uses: codecov/codecov-action@v3
        with:
          directory: frontend/coverage/
          flags: frontend


  rustfmt:
    name: Check Rust style
    runs-on: ubuntu-latest

    permissions:
      contents: read

    steps:
      - name: Checkout the code
        uses: actions/checkout@v3

      - name: Install toolchain
        run: |
          rustup toolchain install nightly
          rustup default nightly
          rustup component add rustfmt

      - name: Check style
        run: cargo fmt --all -- --check

  
  check-schema:
    name: Check schema
    runs-on: ubuntu-latest

    permissions:
      contents: read

    steps:
      - name: Checkout the code
        uses: actions/checkout@v3

      - name: Install Rust toolchain
        run: |
          rustup toolchain install stable
          rustup default stable

      - name: Setup Rust cache
        uses: Swatinem/rust-cache@v2

      - name: Install Node
        uses: actions/setup-node@v3
        with:
          node-version: 16
          cache: 'npm'
          cache-dependency-path: frontend/package-lock.json

      - name: Install Node dependencies
        working-directory: ./frontend
        run: npm ci

      - name: Update the schemas
        run: sh ./misc/update.sh

      - name: Check that the workspace is clean
        run: |
          [[ -z $(git status -s) ]]


  clippy:
    name: Run Clippy
    needs: [rustfmt, opa-lint]
    runs-on: ubuntu-latest

    permissions:
      contents: read

    steps:
      - name: Checkout the code
        uses: actions/checkout@v3

      - name: Install toolchain
        run: |
          rustup toolchain install 1.65.0
          rustup default 1.65.0
          rustup component add clippy

      - name: Setup OPA
        uses: open-policy-agent/setup-opa@v2.0.1
        with:
          version: 0.45.0

      - name: Compile OPA policies
        working-directory: ./policies
        run: make

      - name: Setup Rust cache
        uses: Swatinem/rust-cache@v2

      - name: Run clippy
        run: |
          cargo clippy --workspace -- -D warnings


  test:
    name: Run test suite with Rust ${{ matrix.toolchain }}
    needs: [rustfmt, opa-lint]
    runs-on: ubuntu-latest

    permissions:
      contents: read

    strategy:
      fail-fast: false # Continue other jobs if one fails to help filling the cache
      matrix:
        toolchain:
          - stable
          - beta
          - nightly

    services:
      postgres:
        image: docker.io/library/postgres:14.4
        env:
          POSTGRES_USER: postgres
          POSTGRES_PASSWORD: postgres
          POSTGRES_DB: postgres
        options: >-
          --health-cmd pg_isready
          --health-interval 10s
          --health-timeout 5s
          --health-retries 5
        ports:
          - "5432:5432"

    steps:
      - name: Checkout the code
        uses: actions/checkout@v3

      - name: Install toolchain
        run: |
          rustup toolchain install ${{ matrix.toolchain }}
          rustup default ${{ matrix.toolchain }}

      - name: Setup OPA
        uses: open-policy-agent/setup-opa@v2.0.1
        with:
          version: 0.45.0

      - name: Compile OPA policies
        working-directory: ./policies
        run: make

      - name: Setup Rust cache
        uses: Swatinem/rust-cache@v2

      - name: Test
        id: test
        env:
          DATABASE_URL: postgresql://postgres:postgres@localhost/postgres
          SQLX_OFFLINE: '1'
        run: |
          cargo test --workspace

        # Ignore errors on the nightly toolchain
        continue-on-error: "${{ matrix.toolchain == 'nightly' }}"

      - name: Emit error annotation on failures
        if: steps.test.outcome == 'failure'
        run: |
          echo "::error ::Test suite failed on ${{ matrix.toolchain }} toolchain"


  coverage:
    name: Code coverage
    needs: [rustfmt, opa-lint]
    runs-on: ubuntu-latest

    permissions:
      contents: read

    services:
      postgres:
        image: docker.io/library/postgres:14.4
        env:
          POSTGRES_USER: postgres
          POSTGRES_PASSWORD: postgres
          POSTGRES_DB: postgres
        options: >-
          --health-cmd pg_isready
          --health-interval 10s
          --health-timeout 5s
          --health-retries 5
        ports:
          - "5432:5432"

    steps:
      - name: Checkout the code
        uses: actions/checkout@v3

      - name: Install toolchain
        run: |
          rustup toolchain install stable
          rustup default stable
          rustup component add llvm-tools-preview

      - name: Setup OPA
        uses: open-policy-agent/setup-opa@v2.0.1
        with:
          version: 0.45.0

      - name: Compile OPA policies
        working-directory: ./policies
        run: make

      - name: Setup Rust cache
        uses: Swatinem/rust-cache@v2

      - name: Download grcov
        run: |
          mkdir -p "${HOME}/.local/bin"
          curl -sL https://github.com/mozilla/grcov/releases/download/v0.8.13/grcov-x86_64-unknown-linux-gnu.tar.bz2 | tar jxf - -C "${HOME}/.local/bin"
          echo "$HOME/.local/bin" >> $GITHUB_PATH

      - name: Run test suite with profiling enabled
        run: |
          cargo test --no-fail-fast --workspace
        env:
          RUSTFLAGS: '-Cinstrument-coverage'
          LLVM_PROFILE_FILE: "cargo-test-%p-%m.profraw"
          DATABASE_URL: postgresql://postgres:postgres@localhost/postgres
          SQLX_OFFLINE: '1'

      - name: Build grcov report
        run: |
          mkdir -p target/coverage
          grcov . --binary-path ./target/debug/deps/ -s . -t lcov --branch --ignore-not-existing --ignore '../*' --ignore "/*" -o target/coverage/tests.lcov

      - name: Upload to codecov.io
        uses: codecov/codecov-action@v3
        with:
          files: target/coverage/*.lcov
          flags: unit


  build-image:
    name: Build and push Docker image
    needs: [rustfmt, opa-lint]
    runs-on: ubuntu-latest
    env:
      IMAGE: ghcr.io/matrix-org/matrix-authentication-service

    permissions:
      contents: read
      packages: write
      id-token: write

    steps:
      - name: Checkout the code
        uses: actions/checkout@v3

      - name: Docker meta
        id: meta
        uses: docker/metadata-action@v4
        with:
          images: "${{ env.IMAGE }}"
          bake-target: docker-metadata-action
          tags: |
            type=ref,event=branch
            type=semver,pattern={{version}}
            type=semver,pattern={{major}}.{{minor}}
            type=semver,pattern={{major}}
            type=sha

      - name: Docker meta (debug variant)
        id: meta-debug
        uses: docker/metadata-action@v4
        with:
          images: "${{ env.IMAGE }}"
          bake-target: docker-metadata-action-debug
          tags: |
            type=ref,event=branch,suffix=-debug
            type=semver,pattern={{version}},suffix=-debug
            type=semver,pattern={{major}}.{{minor}},suffix=-debug
            type=semver,pattern={{major}},suffix=-debug
            type=sha,suffix=-debug

      - name: Setup Cosign
        uses: sigstore/cosign-installer@v2.8.1

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v2
        with:
          config-inline: |
            [registry."docker.io"]
              mirrors = ["mirror.gcr.io"]

      - name: Login to GitHub Container Registry
        if: github.event_name != 'pull_request'
        uses: docker/login-action@v2
        with:
          registry: ghcr.io
          username: ${{ github.repository_owner }}
          password: ${{ secrets.GITHUB_TOKEN }}

      # For pull-requests, only read from the cache, do not try to push to the
      # cache or the image itself
      # We only build for the amd64 platform in pull-requests to speed-up CI
      - name: Build
        uses: docker/bake-action@v2
        if: github.event_name == 'pull_request'
        with:
          files: |
            docker-bake.hcl
            ${{ steps.meta.outputs.bake-file }}
            ${{ steps.meta-debug.outputs.bake-file }}
          set: |
            base.context=https://github.com/${{ github.repository }}.git#${{ github.ref }}
            base.platform=linux/amd64
            base.cache-from=type=registry,ref=${{ env.IMAGE }}:buildcache

      - name: Build and push
        uses: docker/bake-action@v2
        if: github.event_name != 'pull_request'
        with:
          files: |
            docker-bake.hcl
            ${{ steps.meta.outputs.bake-file }}
            ${{ steps.meta-debug.outputs.bake-file }}
          set: |
            base.context=https://github.com/${{ github.repository }}.git#${{ github.ref }}
            base.output=type=image,push=true
            base.cache-from=type=registry,ref=${{ env.IMAGE }}:buildcache
            base.cache-to=type=registry,ref=${{ env.IMAGE }}:buildcache,mode=max

      - name: Sign the images with GitHub Actions provided token
        # Only sign on tags and on commits on main branch
        if: |
          github.event_name != 'pull_request'
          && (startsWith(github.ref, 'refs/tags/v') || github.ref == 'refs/heads/main')

        run: cosign sign ${TAGS}
        env:
          TAGS: "${{ steps.meta.outputs.tags }} ${{ steps.meta-debug.outputs.tags }}"
          COSIGN_EXPERIMENTAL: 1


  tests-done:
    name: Tests done
    if: ${{ always() }}
    needs:
      - opa-lint
      - frontend-lint
      - frontend-test
      - rustfmt
      - clippy
      - check-schema
      - test
      - coverage
      - build-image
    runs-on: ubuntu-latest

    steps:
      - uses: matrix-org/done-action@v2
        with:
          needs: ${{ toJSON(needs) }}