ci.yml

name: Rust CI/CD

on:
  push:
    branches:
      - master
  pull_request:

env:
  IMAGE: paritytech/ci-unified:bullseye-1.79.0
concurrency:
  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
  cancel-in-progress: true
jobs:
  set-image:
    # GitHub Actions does not allow using 'env' in a container context.
    # This workaround sets the container image for each job using 'set-image' job output.
    runs-on: ubuntu-latest
    outputs:
      IMAGE: ${{ steps.set_image.outputs.IMAGE }}
    steps:
      - id: set_image
        run: echo "IMAGE=${{ env.IMAGE }}" >> $GITHUB_OUTPUT

# Checks
  fmt:
    runs-on: ubuntu-latest
    needs: [set-image]
    container: ${{ needs.set-image.outputs.IMAGE }}
    steps:
      - name: Checkout code
        uses: actions/checkout@v4

      - name: Show Cargo version
        run: cargo +nightly -vV

      - name: Cargo fmt
        run: cargo +nightly fmt --all -- --check

  clippy:
    runs-on: ubuntu-latest
    needs: [set-image]
    container: ${{ needs.set-image.outputs.IMAGE }}
    steps:
      - name: Checkout code/.
        uses: actions/checkout@v4

      - name: Show Rust version
        run: |
          cargo -vV
          rustc -vV
          rustup show

      - name: Cache Rust dependencies
        uses: swatinem/rust-cache@v2
        with:
          key: ${{ runner.os }}-rust-${{ hashFiles('**/Cargo.lock') }}

      - name: Run Clippy
        run: |
          cargo +stable clippy --locked -- -Dwarnings
          cargo +stable clippy --locked -p parity-scale-codec-derive -- -Dwarnings
          cargo +stable clippy --locked --test clippy -- -Dwarnings

  checks:
    runs-on: ubuntu-latest
    needs: [set-image]
    container: ${{ needs.set-image.outputs.IMAGE }}
    steps:
      - name: Checkout code
        uses: actions/checkout@v4

      - name: Show Rust version
        run: |
          cargo -vV
          rustc -vV
          rustup show

      - name: Cache Rust dependencies
        uses: swatinem/rust-cache@v2
        with:
          key: ${{ runner.os }}-rust-${{ hashFiles('**/Cargo.lock') }}

      - name: Check Rust Stable (no_derive_no_std)
        run: time cargo +stable check --verbose --no-default-features --features bit-vec,bytes,generic-array

      - name: Check Rust Stable (no_std-chain-error)
        run: |
          export RUSTFLAGS='-Cdebug-assertions=y -Dwarnings'
          time cargo +stable check --verbose --no-default-features --features chain-error

      - name: check-rust-stable-no_derive
        run: |
          export RUSTFLAGS='-Cdebug-assertions=y -Dwarnings'
          time cargo +stable check --verbose --features bit-vec,bytes,generic-array

      - name: check-rust-stable-only_mel
        run: |
          export RUSTFLAGS='-Cdebug-assertions=y -Dwarnings'
          time cargo +stable check --verbose --features max-encoded-len

# Tests
  tests:
    runs-on: ubuntu-latest
    needs: [set-image]
    container: ${{ needs.set-image.outputs.IMAGE }}
    steps:
      - name: Checkout code
        uses: actions/checkout@v4

      - name: Show Rust version
        run: |
          cargo -vV
          rustc -vV
          rustup show

      - name: Cache Rust dependencies
        uses: swatinem/rust-cache@v2
        with:
          key: ${{ runner.os }}-rust-${{ hashFiles('**/Cargo.lock') }}

      - name: Test Rust Stable
        run: |
          export RUSTFLAGS='-Cdebug-assertions=y -Dwarnings'
          time cargo +stable test --verbose --all --features bit-vec,bytes,generic-array,derive,max-encoded-len

      - name: Test Rust Stable (no_derive)
        run: |
          export RUSTFLAGS='-Cdebug-assertions=y -Dwarnings'
          time cargo +stable test --verbose --features bit-vec,bytes,generic-array

      - name: Test Rust Stable (only_mel)
        run: |
          export RUSTFLAGS='-Cdebug-assertions=y -Dwarnings'
          time cargo +stable test --verbose --features max-encoded-len

      - name: Test Rust Stable (only_mel-no_default_std)
        run: |
          export RUSTFLAGS='-Cdebug-assertions=y -Dwarnings'
          time cargo +stable test --verbose --features max-encoded-len,std --no-default-features

# Benches
  bench-rust-nightly:
    runs-on: ubuntu-latest
    needs: [set-image]
    strategy:
      matrix:
        feature: [bit-vec,bytes,generic-array,derive,max-encoded-len]
    container: ${{ needs.set-image.outputs.IMAGE }}
    steps:
      - name: Checkout code
        uses: actions/checkout@v4

      - name: Cache Rust dependencies
        uses: swatinem/rust-cache@v2
        with:
          key: ${{ runner.os }}-rust-${{ hashFiles('**/Cargo.lock') }}

      - name: Bench Rust Nightly
        run: |
          export RUSTFLAGS='-Cdebug-assertions=y -Dwarnings'
          time cargo +nightly bench --features ${{ matrix.feature }}

  miri:
    runs-on: ubuntu-latest
    needs: [set-image]
    strategy:
      matrix:
        feature: [bit-vec,bytes,generic-array,arbitrary]
    container: ${{ needs.set-image.outputs.IMAGE }}
    steps:
      - name: Checkout code
        uses: actions/checkout@v4

      - name: Cache Rust dependencies
        uses: swatinem/rust-cache@v2
        with:
          key: ${{ runner.os }}-rust-${{ hashFiles('**/Cargo.lock') }}

      - name: Run Miri
        run: |
          export RUST_BACKTRACE=1
          export RUSTFLAGS='-Cdebug-assertions=y -Dwarnings'
          export MIRIFLAGS='-Zmiri-disable-isolation'
          time cargo +nightly miri test --features ${{ matrix.feature }} --release

# Build

  build-linux-ubuntu-amd64:
    runs-on: ubuntu-latest
    needs: [set-image, clippy, checks, tests]
    container: ${{ needs.set-image.outputs.IMAGE }}
    steps:
      - name: Checkout code
        uses: actions/checkout@v4

      - name: Cache Rust dependencies
        uses: swatinem/rust-cache@v2
        with:
          key: ${{ runner.os }}-rust-${{ hashFiles('**/Cargo.lock') }}

      - name: Build for Linux (Ubuntu, AMD64)
        run: cargo build --verbose --release --features bit-vec,bytes,generic-array,derive

  publish-dry-run:
    runs-on: ubuntu-latest
    needs: [set-image, build-linux-ubuntu-amd64]
    container: ${{ needs.set-image.outputs.IMAGE }}
    steps:
      - name: Checkout code
        uses: actions/checkout@v4

      - name: Cache Rust dependencies
        uses: swatinem/rust-cache@v2
        with:
          key: ${{ runner.os }}-rust-${{ hashFiles('**/Cargo.lock') }}

      - name: Dry Run Publish
        if: github.event_name == 'pull_request'
        run: cargo publish -p parity-scale-codec --dry-run