test.yml

name: Tests

on:
  push:
    branches:
      - main
      - master
  pull_request:
    branches:
      - main
      - master

# cargo error handling is wrapped by ci-cargo, for simplicity and better logging.
# To use ci-cargo in a step, source ci-cargo.ps1 (using `. ./ci-cargo.ps`, note the extra dot in front).
# ci-cargo does not handle correctly -- separator, so wrap it in quotes ('--')
# A special named parameter called `ActionName` can be used to set the name of current ci-cargo action,
# used as `ci-cargo .... -ActionName "Called for documentation purposes"`.
jobs:
  # All tests under this job are run with pre-computed libR-sys bindings.
  tests_no_bindgen:
    runs-on: ${{ matrix.config.os }}

    name: ${{ matrix.config.os }} (R-${{ matrix.config.r }} rust-${{ matrix.config.rust-version }})

    strategy:
      fail-fast: false
      matrix:
        config:
          - { os: windows-latest, r: 'release', rust-version: 'stable-msvc', rtools-version: '43' }
          - { os: windows-latest, r: 'devel',   rust-version: 'stable-msvc', rtools-version: '43' }
          - { os: windows-latest, r: 'oldrel',  rust-version: 'stable-msvc', rtools-version: '42' }

          - { os: macOS-latest,   r: 'release', rust-version: 'stable' }
          # - {os: macOS-latest,   r: 'release', rust-version: 'nightly'}
          # - {os: macOS-latest,   r: 'devel', rust-version: 'stable'}
          # - {os: macOS-latest,   r: 'oldrel', rust-version: 'stable'}

          - { os: ubuntu-latest,   r: 'release', rust-version: 'stable', check_fmt: true }
          - { os: ubuntu-latest,   r: 'release', rust-version: 'nightly' }
          # R-devel requires LD_LIBRARY_PATH
          - { os: ubuntu-latest,   r: 'devel',   rust-version: 'stable' }
          - { os: ubuntu-latest,   r: 'oldrel',  rust-version: 'stable' }



    env:
      R_REMOTES_NO_ERRORS_FROM_WARNINGS: true

      # This environment variable enables support for pseudo multi-target cargo builds.
      # Current stable Rust does not support multi-targeting,
      # see https://github.com/rust-lang/cargo/issues/8176
      # The variable is treated as a comma-separated list of valid Rust targets.
      # 'default' value emits no '--target' flag.
      # E.g.: BUILD_TARGETS=i686-pc-windows-gnu,x86_64-pc-windows-gnu builds two times,
      # each time providing '--target=*-pc-windows-gnu' flag to cargo.
      BUILD_TARGETS: default
    
    # PowerShell core is available on all platforms and can be used to unify scripts
    defaults:
      run:
        shell: pwsh

    steps:
      - uses: actions/checkout@v4
      
      - name: Set up Rust
        uses: dtolnay/rust-toolchain@master
        with:
          toolchain: ${{ matrix.config.rust-version }}
          components: rustfmt, clippy

      - name: Install cargo-expand
        uses: dtolnay/install@master
        if: startsWith(runner.os, 'Windows') != true
        with:
          crate: cargo-expand

        # https://github.com/dtolnay/install/issues/12
      - name: Install cargo-expand (dtolnay/install#12 workaround)
        if: startsWith(runner.os, 'Windows')
        run: cargo install cargo-expand

      - name: Set up R
        uses: r-lib/actions/setup-r@v2
        with:
          r-version: ${{ matrix.config.r }}
          rtools-version: ${{ matrix.config.rtools-version }}
          # TODO: enable RSPM when all the packages are available
          use-public-rspm: false

      - name: Set up Pandoc
        uses: r-lib/actions/setup-pandoc@v2

      - name: Configure Windows
        if: startsWith(runner.os, 'Windows')
        run: |
          $rtools_home = "C:\rtools${{ matrix.config.rtools-version }}"

          # c.f. https://github.com/wch/r-source/blob/f1501504df8df1668a57d3a1b6f80167f24441d3/src/library/profile/Rprofile.windows#L70-L71
          echo "${rtools_home}\x86_64-w64-mingw32.static.posix\bin"      | Out-File -FilePath $env:GITHUB_PATH -Encoding utf8 -Append ;
          echo "${rtools_home}\usr\bin"                                  | Out-File -FilePath $env:GITHUB_PATH -Encoding utf8 -Append ;
          echo "$(Rscript.exe -e 'cat(normalizePath(R.home()))')\bin\x64"  | Out-File -FilePath $env:GITHUB_PATH -Encoding utf8 -Append ;

          # Add target
          rustup target add x86_64-pc-windows-gnu
          echo "BUILD_TARGETS=x86_64-pc-windows-gnu" | Out-File -FilePath $env:GITHUB_ENV -Encoding utf8 -Append ;

          # The following lines add two tweaks:
          #
          #  1. Change the linker name to "x86_64-w64-mingw32.static.posix-gcc.exe".
          #  2. Add empty libgcc_s.a and libgcc_eh.a, and add them to the compiler's
          #     library search paths via `LIBRARY_PATH` envvar.
          # 
          # The first tweak is needed because Rtools42 doesn't contain 
          # "x86_64-w64-mingw32-gcc," which `rustc` uses as the default linker 
          # for the `x86_64-pc-windows-gnu` target.
          #  
          # If we use the Rtools' toolchain, the second tweak is also required.
          # `rustc` adds `-lgcc_eh` and `-lgcc_s` flags to the compiler, but
          # Rtools' GCC doesn't have `libgcc_eh` or `libgcc_s` due to the 
          # compilation settings. So, in order to please the compiler, we need
          # to add empty `libgcc_eh` or `libgcc_s` to the library search paths.
          # 
          # For more details, please refer to https://github.com/r-windows/rtools-packages/blob/2407b23f1e0925bbb20a4162c963600105236318/mingw-w64-gcc/PKGBUILD#L313-L316

          New-Item -Path libgcc_mock -Type Directory
          New-Item -Path libgcc_mock\libgcc_eh.a -Type File
          New-Item -Path libgcc_mock\libgcc_s.a -Type File

          New-Item -Path .cargo -ItemType Directory -Force
          $pwd_slash = echo "${PWD}" | % {$_ -replace '\\','/'}
          @"
          [target.x86_64-pc-windows-gnu]
          linker = "x86_64-w64-mingw32.static.posix-gcc.exe"

          [env]
          LIBRARY_PATH = "${pwd_slash}/libgcc_mock"
          "@ | Out-File -FilePath .cargo/config.toml -Encoding utf8 -Append ;
        env:
          RUST_TOOLCHAIN: ${{ matrix.config.rust-version }}

      # This is required for ubuntu r-devel
      # 'Del alias:R' removes 'R' alias which prevents running R 
      - name: Configure Linux
        if: startsWith(runner.os, 'linux')
        run: |
          Del alias:R
          echo "LD_LIBRARY_PATH=$(R -s -e 'cat(normalizePath(R.home()))')/lib" | Out-File -FilePath $env:GITHUB_ENV -Encoding utf8 -Append

      # Check code formatting. As this doesn't depend on the platform, do this only on one platform.
      - name: Check code formatting
        if: matrix.config.check_fmt
        run: cargo fmt -- --check

      # For each target in the BUILD_TARGETS comma-separated list, run cargo build with appropriate target
      # Required by Windows builds, does not affect other platforms
      - name: Build
        run: |
          . ./ci-cargo.ps1
          foreach($target in ($env:BUILD_TARGETS).Split(',')) {
            ci-cargo build $(if($target -ne 'default') {"--target=$target"} ) -ActionName "Building for $target target"
          }
      # For each target in the BUILD_TARGETS comma-separated list, run cargo test with appropriate target
      # Required by Windows builds, does not affect other platforms
      # ! ci-cargo requires '--' to be wrapped in quotes (passed as an explicit string)
      - name: Run tests
        run: |
          . ./ci-cargo.ps1
          foreach($target in ($env:BUILD_TARGETS).Split(',')) {
            # Note: no feature is specified, which means such features like graphics, serde, ndarray, and num-complex are not tested here. 
            ci-cargo test $(if($target -ne 'default') {"--target=$target"} ) '--' --nocapture -ActionName "Testing for $target target"
          }
        env:
          RUST_BACKTRACE: 1

      # c.f. https://github.com/actions/checkout#checkout-multiple-repos-side-by-side
      - name: Obtain 'rextendr'
        uses: actions/checkout@v4
        with:
          repository: extendr/rextendr
          path: ./tests/rextendr

      - name: Install dependencies for extendrtests and rcmdcheck
        uses: r-lib/actions/setup-r-dependencies@v2
        with:
          cache-version: 4
          working-directory: tests/extendrtests
          extra-packages: any::rcmdcheck

      - name: Install dependencies for rextendr
        uses: r-lib/actions/setup-r-dependencies@v2
        with:
          cache-version: 4
          working-directory: tests/rextendr
      
      
      # TODO: allow warnings on oldrel (cf., https://stat.ethz.ch/pipermail/r-package-devel/2023q2/009229.html)
      - name: Check R version
        id: error-on
        run: |
          output <- Sys.getenv("GITHUB_OUTPUT")
          if (.Platform$OS.type == "windows" && getRversion() < "4.3.0") {
            cat('level=error', file = output, append = TRUE)
          } else {
            cat('level=warning', file = output, append = TRUE)
          }
        shell: Rscript {0}

      - name: Run R integration tests using {extendrtests} and `cargo extendr r-cmd-check`
        run: |
          cargo extendr r-cmd-check --error-on ${{ steps.error-on.outputs.level }} --check-dir extendrtests_check

      # With https://github.com/extendr/rextendr/pull/31
      # rextendr can be configured using environment variables.
      # 'patch.crates_io' is used to point libraries to local copies of
      # extendr-api and extendr-macros, so rextendr tests current version of extendr-*
      - name: Prepare for R integration tests using {rextendr}
        id: rextendr_check
        env:
          _R_CHECK_CRAN_INCOMING_REMOTE_: false
        run: |
          cat("::group::Preparing 'rextendr'\n")

          patch.crates_io <-
            paste(
              paste0(
                "extendr-api = { path = \"",
                normalizePath(file.path(getwd(), "extendr-api"), winslash = "/"),
                "\" }"),

              paste0(
                "extendr-macros = { path = \"",
                normalizePath(file.path(getwd(), "extendr-macros"), winslash = "/"),
                "\" }"),

              # uncomment this line when we need to depend on the dev version of libR-sys
              #'libR-sys = { git = "https://github.com/extendr/libR-sys" }',

              sep = ";")
          
          patch.crates_io <- paste0("REXTENDR_PATCH_CRATES_IO=", patch.crates_io)

          github_env_file <- Sys.getenv("GITHUB_ENV")
          cat(patch.crates_io, file = github_env_file, append = TRUE)

          cat("::endgroup::\n")
        shell: Rscript {0}

      - name: Run R integration tests using {rextendr}
        uses: r-lib/actions/check-r-package@v2
        with:
          args: 'c("--no-manual", "--as-cran", "--force-multiarch")'
          working-directory: 'tests/rextendr'
          check-dir: '"rextendr_check"'
          error-on: '"${{ steps.error-on.outputs.level }}"'

  # All tests under this job are run with R devel and freshly generated bindings.
  # Run bindgen tests without cross-compilation.
  # Cross-compilation prevents from running doc tests
  # if toolchain does not match target (Windows x86_64/i686 case), see
  #  > https://github.com/rust-lang/rust/issues/64245
  #  > https://github.com/rust-lang/cargo/issues/7040
  bindgen:
    runs-on: ${{ matrix.config.os }}

    name: ${{ matrix.config.os }} w/ bindgen (R-${{ matrix.config.r }} rust-${{ matrix.config.rust-version }} ${{join(matrix.config.rust-targets, ',')}})
    
    strategy:
      fail-fast: false
      matrix:
        config:
          - { os: ubuntu-latest,  r: 'devel',   rust-version: 'stable' }
          - { os: macOS-latest,   r: 'devel',   rust-version: 'stable' }
          - { os: windows-latest, r: 'release', rust-version: 'stable-msvc',  rust-targets: [ 'x86_64-pc-windows-gnu' ], rtools-version: '43' }
          - { os: windows-latest, r: 'devel',   rust-version: 'stable-msvc',  rust-targets: [ 'x86_64-pc-windows-gnu' ], rtools-version: '43' }
          # When the MSVC target is used, since it's cross-compilation from MSVC
          # to GNU, the doc tests are usually skipped. Adding `-Zdoctest-xcompile`
          # lets the doctests run, which accordingly require the nightly toolchain.
          - { os: windows-latest, r: 'release', rust-version: 'nightly-msvc', rust-targets: [ 'x86_64-pc-windows-gnu' ], rtools-version: '43', extra-args: [ '-Zdoctest-xcompile' ] }
          - { os: windows-latest, r: 'oldrel',  rust-version: 'nightly-msvc', rust-targets: [ 'x86_64-pc-windows-gnu' ], rtools-version: '42', extra-args: [ '-Zdoctest-xcompile' ] }

    env:
      R_REMOTES_NO_ERRORS_FROM_WARNINGS: true

    # PowerShell core is available on all platforms and can be used to unify scripts
    defaults:
      run:
        shell: pwsh

    steps:
      - uses: actions/checkout@v4

      - name: Set up Rust
        uses: dtolnay/rust-toolchain@master
        with:
          toolchain: ${{ matrix.config.rust-version }}

      # 1. Update rustup
      # 2. For each target add respective toolchain &
      #    update target for that toolchain
      - name: Set up Rust targets
        run: |
          $targets = $env:RUST_TARGETS.Split(',')
          foreach ($target in $targets) {
            echo "::group::Setting up $env:RUST_TOOLCHAIN $target"
            if ($target -ne '') {
              rustup target add $target --toolchain "$env:RUST_TOOLCHAIN"
              if(!$?) {
                throw "Last exit code $LASTEXITCODE"
              }
            }
            echo "::endgroup::"
          }
        env:
          RUST_TARGETS: ${{ join(matrix.config.rust-targets, ',') }}
          RUST_TOOLCHAIN: ${{ matrix.config.rust-version }}

      - name: Set up R
        uses: r-lib/actions/setup-r@v2
        with:
          r-version: ${{ matrix.config.r }}
          rtools-version: ${{ matrix.config.rtools-version }}
          use-public-rspm: true
          windows-path-include-mingw: false

      - name: Configure Windows
        if: startsWith(runner.os, 'Windows')
        run: |
          $rtools_home = "C:\rtools${{ matrix.config.rtools-version }}"

          echo "::group::Setting up x86_64"
          echo "C:\msys64\mingw64\bin" | Out-File -FilePath $env:GITHUB_PATH -Encoding utf8 -Append
          # c.f. https://github.com/wch/r-source/blob/f1501504df8df1668a57d3a1b6f80167f24441d3/src/library/profile/Rprofile.windows#L70-L71
          echo "${rtools_home}\x86_64-w64-mingw32.static.posix\bin"      | Out-File -FilePath $env:GITHUB_PATH -Encoding utf8 -Append ;
          echo "${rtools_home}\usr\bin"                                  | Out-File -FilePath $env:GITHUB_PATH -Encoding utf8 -Append ;
          echo "$(Rscript.exe -e 'cat(normalizePath(R.home()))')\bin\x64"  | Out-File -FilePath $env:GITHUB_PATH -Encoding utf8 -Append
          echo "::endgroup::"
          
          # The following lines add two tweaks:
          #
          #  1. Change the linker name to "x86_64-w64-mingw32.static.posix-gcc.exe".
          #  2. Add empty libgcc_s.a and libgcc_eh.a, and add them to the compiler's
          #     library search paths via `LIBRARY_PATH` envvar.
          # 
          # The first tweak is needed because Rtools42 doesn't contain 
          # "x86_64-w64-mingw32-gcc," which `rustc` uses as the default linker 
          # for the `x86_64-pc-windows-gnu` target.
          #  
          # If we use the Rtools' toolchain, the second tweak is also required.
          # `rustc` adds `-lgcc_eh` and `-lgcc_s` flags to the compiler, but
          # Rtools' GCC doesn't have `libgcc_eh` or `libgcc_s` due to the 
          # compilation settings. So, in order to please the compiler, we need
          # to add empty `libgcc_eh` or `libgcc_s` to the library search paths.
          # 
          # For more details, please refer to https://github.com/r-windows/rtools-packages/blob/2407b23f1e0925bbb20a4162c963600105236318/mingw-w64-gcc/PKGBUILD#L313-L316

          New-Item -Path libgcc_mock -Type Directory
          New-Item -Path libgcc_mock\libgcc_eh.a -Type File
          New-Item -Path libgcc_mock\libgcc_s.a -Type File

          New-Item -Path .cargo -ItemType Directory -Force
          $pwd_slash = echo "${PWD}" | % {$_ -replace '\\','/'}
          @"
          [target.x86_64-pc-windows-gnu]
          linker = "x86_64-w64-mingw32.static.posix-gcc.exe"

          [env]
          LIBRARY_PATH = "${pwd_slash}/libgcc_mock"
          "@ | Out-File -FilePath .cargo/config.toml -Encoding utf8 -Append ;
        env:
          RUST_TARGETS: ${{ join(matrix.config.rust-targets, ',') }}

      - name: Configure Linux
        if: startsWith(runner.os, 'linux')
        run: |
          Del alias:R
          echo "LD_LIBRARY_PATH=$(R -s -e 'cat(normalizePath(R.home()))')/lib" | Out-File -FilePath $env:GITHUB_ENV -Encoding utf8 -Append

      # 1. Retrieve targets
      # 2. Retrieve 'libcalng' paths
      # 3. For each target run
      # 3.1 Select correct $target & $toolchain
      # 3.x Run build commands, checking for errors, providing explicit toolchain & target
      - name: Build
        run: |
          . ./ci-cargo.ps1
          $targets = $env:BUILD_TARGETS.Split(',')
          $toolchain = $env:RUST_TOOLCHAIN
          $itt = 0..($targets.Length - 1)
          foreach($i in $itt) {
            if ($targets[$i] -eq "") {
              $target = 'default'
            }
            else {
              $target = $targets[$i]
            }

            ci-cargo +$toolchain build --manifest-path extendr-api/Cargo.toml --features tests-all $(if($target -ne 'default') {"--target=$target"} ) -ActionName "Build extendr-api for $toolchain/$target"
          
            ci-cargo +$toolchain build --manifest-path extendr-engine/Cargo.toml --features tests-all $(if($target -ne 'default') {"--target=$target"} ) -ActionName "Build extendr-engine for $toolchain/$target"
          
          }
        env:
          BUILD_TARGETS: ${{ join(matrix.config.rust-targets, ',') }}
          RUST_TOOLCHAIN: ${{ matrix.config.rust-version }}

      # Identical to the build process, but running more test commands
      # ! ci-cargo requires '--' to be wrapped in quotes (passed as an explicit string)
      - name: Run tests
        run: |
          . ./ci-cargo.ps1
          $targets = $env:BUILD_TARGETS.Split(',')
          $toolchain = $env:RUST_TOOLCHAIN
          $itt = 0..($targets.Length - 1)
          foreach($i in $itt) {
            if ($targets[$i] -eq "") {
              $target = 'default'
            }
            else {
              $target = $targets[$i]
            }

            ci-cargo +$toolchain test --manifest-path extendr-engine/Cargo.toml --features tests-all $(if($target -ne 'default') {"--target=$target"} ) $env:EXTRA_ARGS '--' --nocapture -ActionName "Test extendr-engine \w tests-all for $target target"

            ci-cargo +$toolchain test --manifest-path extendr-api/Cargo.toml --features tests $(if($target -ne 'default') {"--target=$target"} ) $env:EXTRA_ARGS '--' --nocapture -ActionName "Test extendr-api \w tests for $target target"

            # graphics tests requires --test-threads=1
            ci-cargo +$toolchain test graphics_tests:: --manifest-path extendr-api/Cargo.toml --features tests-graphics $(if($target -ne 'default') {"--target=$target"} ) $env:EXTRA_ARGS '--' --nocapture --test-threads=1 -ActionName "Test extendr-api \w graphics for $target target"

            ci-cargo +$toolchain test --manifest-path extendr-api/Cargo.toml --features tests-minimal $(if($target -ne 'default') {"--target=$target"} ) $env:EXTRA_ARGS '--' --nocapture -ActionName "Test extendr-api \w tests-minimal for $target target"
          
            ci-cargo +$toolchain test --manifest-path extendr-macros/Cargo.toml  $(if($target -ne 'default') {"--target=$target"} ) $env:EXTRA_ARGS '--' --nocapture -ActionName "Test extendr-macros for $target target"
          
          }
        env:
          BUILD_TARGETS: ${{ join(matrix.config.rust-targets, ',') }}
          RUST_TOOLCHAIN: ${{ matrix.config.rust-version }}
          EXTRA_ARGS: ${{ join(matrix.config.extra-args, ',') }}