cargo_cache:
  folder: $CARGO_HOME/registry
  fingerprint_script: cat Cargo.lock || echo ""

env:
  # Build by default; don't just check
  BUILD: build
  CLIPPYFLAGS: -D warnings
  RUSTFLAGS: -D warnings
  RUSTDOCFLAGS: -D warnings
  TOOL: cargo
  # The MSRV
  TOOLCHAIN: 1.46.0
  ZFLAGS:

# Tests that don't require executing the build binaries
build: &BUILD
  build_script:
    - . $HOME/.cargo/env || true
    - $TOOL +$TOOLCHAIN $BUILD $ZFLAGS --target $TARGET --all-targets
    - $TOOL +$TOOLCHAIN doc $ZFLAGS --no-deps --target $TARGET
    - $TOOL +$TOOLCHAIN clippy $ZFLAGS --target $TARGET -- $CLIPPYFLAGS

# Tests that do require executing the binaries
test: &TEST
  << : *BUILD
  test_script:
    - . $HOME/.cargo/env || true
    - $TOOL +$TOOLCHAIN test --target $TARGET

# Test FreeBSD in a full VM.  Test the i686 target too, in the
# same VM.  The binary will be built in 32-bit mode, but will execute on a
# 64-bit kernel and in a 64-bit environment.  Our tests don't execute any of
# the system's binaries, so the environment shouldn't matter.
task:
  name: FreeBSD amd64 & i686
  env:
    TARGET: x86_64-unknown-freebsd
  freebsd_instance:
    image: freebsd-12-2-release-amd64
  setup_script:
    - fetch https://sh.rustup.rs -o rustup.sh
    - sh rustup.sh -y --profile=minimal --default-toolchain $TOOLCHAIN
    - . $HOME/.cargo/env
    - rustup target add i686-unknown-freebsd
    - rustup component add --toolchain $TOOLCHAIN clippy
  << : *TEST
  i386_test_script:
    - . $HOME/.cargo/env
    - cargo build --target i686-unknown-freebsd
    - cargo doc --no-deps --target i686-unknown-freebsd
    - cargo test --target i686-unknown-freebsd
  before_cache_script: rm -rf $CARGO_HOME/registry/index

# Test OSX in a full VM
task:
  matrix:
    - name: OSX x86_64
      env:
        TARGET: x86_64-apple-darwin
  osx_instance:
    image: catalina-xcode
  setup_script:
    - curl --proto '=https' --tlsv1.2 -sSf -o rustup.sh https://sh.rustup.rs
    - sh rustup.sh -y --profile=minimal --default-toolchain $TOOLCHAIN
    - . $HOME/.cargo/env
    - rustup component add --toolchain $TOOLCHAIN clippy
  << : *TEST
  before_cache_script: rm -rf $CARGO_HOME/registry/index

# Use cross for QEMU-based testing
# cross needs to execute Docker, so we must use Cirrus's Docker Builder task.
task:
  env:
    RUST_TEST_THREADS: 1            # QEMU works best with 1 thread
    HOME: /tmp/home
    PATH: $HOME/.cargo/bin:$PATH
    RUSTFLAGS: --cfg qemu -D warnings
    TOOL: cross
  matrix:
    - name: Linux arm gnueabi
      env:
        TARGET: arm-unknown-linux-gnueabi
    - name: Linux armv7 gnueabihf
      env:
        TARGET: armv7-unknown-linux-gnueabihf
    - name: Linux i686
      env:
        TARGET: i686-unknown-linux-gnu
    - name: Linux i686 musl
      env:
        TARGET: i686-unknown-linux-musl
    - name: Linux MIPS
      env:
        TARGET: mips-unknown-linux-gnu
    - name: Linux MIPS64
      env:
        TARGET: mips64-unknown-linux-gnuabi64
    - name: Linux MIPS64 el
      env:
        TARGET: mips64el-unknown-linux-gnuabi64
    - name: Linux mipsel
      env:
        TARGET: mipsel-unknown-linux-gnu
    - name: Linux powerpc64le
      env:
        TARGET: powerpc64le-unknown-linux-gnu
  compute_engine_instance:
    image_project: cirrus-images
    image: family/docker-builder
    platform: linux
    cpu: 1                          # Since QEMU will only use 1 thread
    memory: 4G
  setup_script:
    - mkdir /tmp/home
    - curl --proto '=https' --tlsv1.2 -sSf -o rustup.sh https://sh.rustup.rs
    - sh rustup.sh -y --profile=minimal --default-toolchain $TOOLCHAIN
    - . $HOME/.cargo/env
    - cargo install cross
  << : *TEST
  before_cache_script: rm -rf $CARGO_HOME/registry/index

# Tasks for Linux native builds
task:
  matrix:
    - name: Rust Stable
      container:
        image: rust:latest
      env:
        TARGET: x86_64-unknown-linux-gnu
        TOOLCHAIN:
    - name: Linux aarch64
      arm_container:
        image: rust:1.46
      env:
        RUSTFLAGS: --cfg graviton -D warnings
        TARGET: aarch64-unknown-linux-gnu
    - name: Linux x86_64
      container:
        image: rust:1.46
      env:
        TARGET: x86_64-unknown-linux-gnu
    - name: Linux x86_64 musl
      container:
        image: rust:1.46
      env:
        TARGET: x86_64-unknown-linux-musl
  setup_script:
    - rustup target add $TARGET
    - rustup component add clippy
  << : *TEST
  before_cache_script: rm -rf $CARGO_HOME/registry/index

# Tasks for cross-compiling, but no testing
task:
  container:
    image: rust:1.46
  env:
    BUILD: check
  matrix:
    # Cross claims to support Android, but when it tries to run Nix's tests it
    # reports undefined symbol references.
    - name: Android aarch64
      env:
        TARGET: aarch64-linux-android
    - name: Android arm
      env:
        TARGET: arm-linux-androideabi
    - name: Android armv7
      env:
        TARGET: armv7-linux-androideabi
    - name: Android i686
      env:
        TARGET: i686-linux-android
    - name: Android x86_64
      env:
        TARGET: x86_64-linux-android
    - name: Linux arm-musleabi
      env:
        TARGET: arm-unknown-linux-musleabi
    - name: Fuchsia x86_64
      env:
        TARGET: x86_64-fuchsia
    - name: Illumos
      env:
        TARGET: x86_64-unknown-illumos
        # illumos toolchain isn't available via rustup until 1.50
        TOOLCHAIN: 1.50.0
      container:
        image: rust:1.50
    # Cross claims to support running tests on iOS, but it actually doesn't.
    # https://github.com/rust-embedded/cross/issues/535
    - name: iOS aarch64
      env:
        TARGET: aarch64-apple-ios
        # Rustup only supports cross-building from arbitrary hosts for iOS at
        # 1.49.0 and above.  Below that it's possible to cross-build from an OSX
        # host, but OSX VMs are more expensive than Linux VMs.
        TOOLCHAIN: 1.49.0
    - name: iOS x86_64
      env:
        TARGET: x86_64-apple-ios
        TOOLCHAIN: 1.49.0
    # Cross testing on powerpc fails with "undefined reference to renameat2".
    # Perhaps cross is using too-old a version?
    - name: Linux powerpc
      env:
        TARGET: powerpc-unknown-linux-gnu
    # Cross claims to support Linux powerpc64, but it really doesn't.
    # https://github.com/rust-embedded/cross/issues/441
    - name: Linux powerpc64
      env:
        TARGET: powerpc64-unknown-linux-gnu
    - name: Linux s390x
      env:
        TARGET: s390x-unknown-linux-gnu
    - name: Linux x32
      env:
        TARGET: x86_64-unknown-linux-gnux32
    - name: NetBSD x86_64
      env:
        TARGET: x86_64-unknown-netbsd
    - name: Redox x86_64
      env:
        TARGET: x86_64-unknown-redox
        # Redox requires a nightly compiler.
        # If stuff breaks, change nightly to the date in the toolchain_*
        # directory at https://static.redox-os.org
        TOOLCHAIN: nightly-2020-08-04
  setup_script:
    - rustup target add $TARGET
    - rustup toolchain install $TOOLCHAIN --profile minimal --target $TARGET
    - rustup component add --toolchain $TOOLCHAIN clippy
  << : *BUILD
  before_cache_script: rm -rf $CARGO_HOME/registry/index

# Rust Tier 3 targets can't use Rustup
task:
  container:
    image: rustlang/rust:nightly
  env:
    BUILD: check
    # Must allow here rather than in lib.rs because this lint doesn't exist
    # prior to Rust 1.57.0
    # https://github.com/rust-lang/rust-clippy/issues/7718
    CLIPPYFLAGS: -D warnings -A clippy::if_then_panic
    TOOLCHAIN: nightly
    ZFLAGS: -Zbuild-std
  matrix:
    - name: DragonFly BSD x86_64
      env:
        TARGET: x86_64-unknown-dragonfly
    - name: OpenBSD x86_64
      env:
        TARGET: x86_64-unknown-openbsd
  setup_script:
    - rustup component add rust-src
  << : *BUILD
  before_cache_script: rm -rf $CARGO_HOME/registry/index

# Test that we can build with the lowest version of all dependencies.
# "cargo test" doesn't work because some of our dev-dependencies, like
# rand, can't build with their own minimal dependencies.
task:
  name: Minver
  env:
    TOOLCHAIN: nightly
  container:
    image: rustlang/rust:nightly
  setup_script:
    - cargo update -Zminimal-versions
  script:
    - cargo check
  before_cache_script: rm -rf $CARGO_HOME/registry/index