Add CI tests and releases for Windows arm64 (#940)

Author: lionel-

.github/workflows/release-windows.yml

@@ -13,7 +13,7 @@ on:
 jobs:
     build_windows:
         name: Build Windows
-        runs-on: windows-latest
+        runs-on: ${{ matrix.runs_on }}
         timeout-minutes: 40
 
         env:
@@ -22,11 +22,15 @@ jobs:
 
         strategy:
             matrix:
-                arch: [x64]
+                arch: [x64, arm64]
                 flavor: [debug, release]
                 include:
                     - arch: x64
+                      runs_on: windows-latest
                       rust_target_prefix: x86_64
+                    - arch: arm64
+                      runs_on: windows-11-arm
+                      rust_target_prefix: aarch64
 
         steps:
             - name: Checkout sources

.github/workflows/release.yml

@@ -121,6 +121,11 @@ jobs:
               with:
                   name: ark-${{ matrix.flavor }}-windows-x64-archive
 
+            - name: Download Windows arm64 kernel (${{ matrix.flavor}})
+              uses: actions/download-artifact@v4
+              with:
+                  name: ark-${{ matrix.flavor }}-windows-arm64-archive
+
             - name: Download Linux x64 kernel (${{ matrix.flavor}})
               uses: actions/download-artifact@v4
               with:
@@ -147,6 +152,14 @@ jobs:
                   tag_name: ${{ needs.get_version.outputs.ARK_VERSION }}
                   files: ark-${{ needs.get_version.outputs.ARK_VERSION }}${{ env.DEBUG_FLAG }}-windows-x64.zip
 
+            - name: Upload Windows release artifact (arm64)
+              uses: softprops/action-gh-release@v2
+              env:
+                  GITHUB_TOKEN: ${{ github.token }}
+              with:
+                  tag_name: ${{ needs.get_version.outputs.ARK_VERSION }}
+                  files: ark-${{ needs.get_version.outputs.ARK_VERSION }}${{ env.DEBUG_FLAG }}-windows-arm64.zip
+
             - name: Upload Linux release artifacts (x64)
               uses: softprops/action-gh-release@v2
               env:

.github/workflows/test-windows.yml

@@ -6,13 +6,21 @@ on:
 
 jobs:
   windows:
-    runs-on: windows-latest
-    name: "Rust: ${{ matrix.config.rust }}, R: ${{ matrix.config.r }}"
+    runs-on: ${{ matrix.runs_on }}
+    name: "Rust: ${{ matrix.config.rust }}, R: ${{ matrix.config.r }}, Arch: ${{ matrix.arch }}"
+
     strategy:
       fail-fast: false
       matrix:
+        arch: [x64, arm64]
         config:
           - { rust: 'stable', r: 'release' }
+        include:
+          - arch: x64
+            runs_on: windows-latest
+          - arch: arm64
+            runs_on: windows-11-arm
+
     timeout-minutes: 30
     env:
       GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
@@ -30,13 +38,32 @@ jobs:
         with:
           tool: cargo-nextest
 
-      - name: Install R
+      # x86_64: Use setup-r
+      - name: Install R (x64)
+        if: matrix.arch == 'x64'
         uses: r-lib/actions/setup-r@v2
         with:
           r-version: ${{ matrix.config.r }}
           use-public-rspm: true
 
-      - name: Install R Packages Required For Tests
+      # arm64: Manual R install (until setup-r supports arm64)
+      - name: Install R (arm64)
+        if: matrix.arch == 'arm64'
+        run: |
+          curl -L -o R-installer.exe https://www.r-project.org/nosvn/winutf8/aarch64/R-4-signed/R-4.5.1-aarch64.exe
+          Start-Process -Wait -FilePath .\R-installer.exe -ArgumentList '/VERYSILENT', '/DIR=C:\R'
+          echo "C:\R\bin" >> $env:GITHUB_PATH
+
+      # arm64: Install Rtools (until setup-r supports arm64)
+      - name: Install Rtools45 (arm64)
+        if: matrix.arch == 'arm64'
+        run: |
+          curl -L -o rtools45-installer.exe https://github.com/r-hub/rtools45/releases/download/latest/rtools45-aarch64.exe
+          Start-Process -Wait -FilePath .\rtools45-installer.exe -ArgumentList '/VERYSILENT'
+
+      # x86_64: Use setup-r-dependencies
+      - name: Install R Packages Required For Tests (x64)
+        if: matrix.arch == 'x64'
         uses: r-lib/actions/setup-r-dependencies@v2
         with:
           packages:
@@ -48,6 +75,12 @@ jobs:
             R6
             survival
 
+      # arm64: Manual install.packages (until setup-r-dependencies supports arm64)
+      - name: Install R Packages Required For Tests (arm64)
+        if: matrix.arch == 'arm64'
+        run: |
+          Rscript -e "install.packages(c('data.table', 'dplyr', 'rstudioapi', 'tibble', 'haven', 'R6', 'survival'), repos = 'https://cloud.r-project.org')"
+
       - name: Build
         run: |
           cargo build

crates/harp/src/sys/windows/library.rs

@@ -90,5 +90,13 @@ pub fn open_r_shared_library(path: &PathBuf) -> Result<libloading::Library, libl
 }
 
 pub fn find_r_shared_library_folder(path: &PathBuf) -> PathBuf {
-    path.join("bin").join("x64")
+    #[cfg(target_arch = "aarch64")]
+    {
+        // arm64 has a flatter structure
+        path.join("bin")
+    }
+    #[cfg(not(target_arch = "aarch64"))]
+    {
+        path.join("bin").join("x64")
+    }
 }