blas-lapack-rs · bnaras · Feb 19, 2025 · Feb 19, 2025 · Feb 20, 2025 · Feb 20, 2025
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
@@ -1,230 +1,59 @@
-name: Tests
+name: cargo-test-on-r-platforms
 
 on:
   push:
-    branches:
-      - main
-      - master
+    branches: [main, master]
   pull_request:
-    branches:
-      - main
-      - master
+  workflow_dispatch:
 
-# 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 
-  tests:
+  cargo-test:
     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: "44",
-              features: "full-functionality",
-            }
-          - {
-              os: windows-latest,
-              r: "devel",
-              rust-version: "stable-msvc",
-              rtools-version: "44",
-              features: "default",
-            }
-          - {
-              os: windows-latest,
-              r: "oldrel",
-              rust-version: "stable-msvc",
-              rtools-version: "43",
-              features: "default",
-            }
-
-          - {
-              os: macOS-latest,
-              r: "release",
-              rust-version: "stable",
-              features: "full-functionality",
-            }
-          - {
-              os: ubuntu-latest,
-              r: "release",
-              rust-version: "stable",
-              features: "full-functionality",
-              check_fmt: true,
-            }
-          - {
-              os: ubuntu-latest,
-              r: "release",
-              rust-version: "nightly",
-              features: "full-functionality",
-              extra-args: ["-Zdoctest-xcompile"],
-            }
-          # R-devel requires LD_LIBRARY_PATH
-          - {
-              os: ubuntu-latest,
-              r: "devel",
-              rust-version: "stable",
-              features: "default",
-            }
-          - {
-              os: ubuntu-latest,
-              r: "oldrel",
-              rust-version: "stable",
-              features: "default",
-            }
-
+          # -------- OS / Rust target triple -----------------
+          - {os: ubuntu-latest,  rust: 'stable'}
+          - {os: macos-latest,   rust: 'stable'}
+          - {os: ubuntu-latest,  r: 'devel',   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
+      CARGO_TERM_COLOR: always
 
     steps:
-      - uses: actions/checkout@v3
-
-      - name: Set up Rust
-        uses: dtolnay/rust-toolchain@master
+      #------------------------------------------------------
+      # 1. Check out your repository
+      #------------------------------------------------------
+      - uses: actions/checkout@v4
+
+      #------------------------------------------------------
+      # 2. Install the same R binaries CRAN uses for R-CMD-check
+      #    (needed only for BLAS/LAPACK and R_HOME detection)
+      #------------------------------------------------------
+      - uses: r-lib/actions/setup-r@v2
         with:
-          toolchain: ${{ matrix.config.rust-version }}
-          components: rustfmt, clippy
-
-      - name: Set up R
-        uses: r-lib/actions/setup-r@v2
+          r-version: 'release'
+
+      #------------------------------------------------------
+      # 3. Install Rust
+      #    * On Windows we pick the GNU target so the linker
+      #      understands R's libRblas.dll.a / libRlapack.dll.a
+      #------------------------------------------------------
+      - uses: actions-rs/toolchain@v1
         with:
-          r-version: ${{ matrix.config.r }}
-          rtools-version: ${{ matrix.config.rtools-version }}
-          # TODO: enable RSPM when all the packages are available
-          use-public-rspm: false
-
-      - name: Set up Pandoc
-        uses: r-lib/actions/setup-pandoc@v2
-
-      - name: Configure Windows (R >= 4.2)
-        if: startsWith(runner.os, 'Windows') && matrix.config.r != '4.1'
-        run: |
-          if ("${{ matrix.config.rtools-version }}" -eq "42") {
-            $rtools_home = "C:\rtools42"   # for R 4.2
-          } else {
-            $rtools_home = "C:\rtools43"   # for R >= 4.3
-          }
-
-          # c.f. https://github.com/wch/r-source/blob/f1501504df8df1668a57d3a1b6f80167f24441d3/src/library/profile/Rprofile.windows#L70-L71
-          echo "${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 }}
-
-      # TODO: Remove this runner when we drop the support for R < 4.2
-      - name: Configure Windows (R < 4.2)
-        if: startsWith(runner.os, 'Windows') && matrix.config.r == '4.1'
-        # 1. Add rust target
-        # 2. Add target name to the $targets variable
-        # 3. Add mingw32/mingw64 bin folders to PATH
-        # 4. Add R x64/i386 folders to PATH
-        run: |
-          $targets=@()
-          if ($env:RUST_TOOLCHAIN -notlike "*x86_64*") {
-            rustup target add i686-pc-windows-gnu ;
-            $targets+="i686-pc-windows-gnu"
-            echo "${env:RTOOLS40_HOME}\mingw32\bin" | Out-File -FilePath $env:GITHUB_PATH -Encoding utf8 -Append ;
-            echo "$(Rscript.exe -e 'cat(normalizePath(R.home()))')\bin\i386"  | Out-File -FilePath $env:GITHUB_PATH -Encoding utf8 -Append ;
-          }
-          if ($env:RUST_TOOLCHAIN -notlike "*i686*") {
-            rustup target add x86_64-pc-windows-gnu ;
-            $targets+="x86_64-pc-windows-gnu"
-            echo "${env:RTOOLS40_HOME}\mingw64\bin" | Out-File -FilePath $env:GITHUB_PATH -Encoding utf8 -Append ;
-            echo "$(Rscript.exe -e 'cat(normalizePath(R.home()))')\bin\x64"  | Out-File -FilePath $env:GITHUB_PATH -Encoding utf8 -Append ;
-          }
-          echo "BUILD_TARGETS=$($targets -join ',')" | Out-File -FilePath $env:GITHUB_ENV -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"
-          }
-
+          profile: minimal
+          toolchain: ${{ matrix.config.rust }}
+          override: true
+          components: rustfmt
+
+      #------------------------------------------------------
+      # 4. Build once in release mode (catches link problems)
+      #------------------------------------------------------
+      - name: cargo build
+        run: cargo build --release --verbose
+
+      #------------------------------------------------------
+      # 5. Run the full test suite in release mode
+      #------------------------------------------------------
+      - name: cargo test
+        run: cargo test --all --release --verbose
diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -1,5 +1,9 @@
 # Changelog
 
+## [0.2.2] - 2025-02-19
+### Fixed
+- Rely on `R_HOME` env var first, then try `R RHOME`; panic if both fail.
+
 ## [0.2.1] - 2025-02-02
 ### Fixed
 - Reformatted code to conform to Rust formatting standards (no functional changes).

diff --git a/Cargo.toml b/Cargo.toml
@@ -1,8 +1,9 @@
 [package]
 name = "r-src"
-version = "0.2.1"
+version = "0.2.2"
 edition = "2021"
 license = "MIT"
+
 authors = ["Balasubramanian Narasimhan <[email protected]>"]
 description = "The package provides a source of BLAS and LAPACK via R."
 documentation = "https://docs.rs/r-src"

diff --git a/README.md b/README.md
@@ -26,9 +26,11 @@ but has extra platform-specific dependencies for `Windows` such as
 
 Two components are required to build the library:
 
-1. [`R`](https://cran.r-project.org/): It needs to be installed and
-   available in the search path. On `Windows`, the `Rtools` binaries
-   are also expected to be on the search path.
+1. [`R`](https://cran.r-project.org/): An environment variable
+   `R_HOME` indicating the value of `R_HOME` is first looked for and,
+   if not found, the command `R RHOME` is tried, so `R` must be on the
+   path for the latter. On `Windows`, the `Rtools` binaries are also
+   expected to be on the search path.
 2. [`Rust`](https://www.rust-lang.org/learn/get-started): It is
    recommended to install `Rust` using `rustup`; search path should
    include `Rust` binaries.