CI: Add MSVC test job

.github/workflows/test.yml

@@ -89,6 +89,7 @@ jobs:
 
       - name: Install dependencies
         run: |
+          brew update
           brew install ninja ccache
           # universal clang+llvm from macports
           curl -LSfs https://axiodl.com/files/clang-11-11.1.0_1.mpkg -o /tmp/clang-11-11.1.0_1.mpkg
@@ -100,11 +101,14 @@ jobs:
           key: macos-10.15-appleclang
           max-size: 1G
 
-      - name: Build
+      - name: Configure CMake
         run: |
           cmake -B build -GNinja -DCMAKE_BUILD_TYPE=RelWithDebInfo -DCMAKE_OSX_ARCHITECTURES="x86_64;arm64" \
             -DClang_DIR=/opt/local/libexec/llvm-11/lib/cmake/clang \
             -DCMAKE_C_COMPILER_LAUNCHER=ccache -DCMAKE_CXX_COMPILER_LAUNCHER=ccache .
+
+      - name: Build
+        run: |
           cmake --build build
           dsymutil build/atdna/atdna
 
@@ -119,3 +123,53 @@ jobs:
           path: |
             build/atdna/atdna
             build/atdna/atdna.dSYM
+
+  test-windows-msvc:
+    name: Build Windows (MSVC x86_64)
+    runs-on: windows-2019
+    env:
+      LLVM_VERSION: 10.0.1
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+          submodules: recursive
+
+      - name: Install LLVM
+        run: |
+          $TempDir = "$env:RUNNER_WORKSPACE\temp"
+          $Filename = "LLVM-$env:LLVM_VERSION-win64.exe"
+          New-Item -Path "$TempDir" -ItemType Directory -ea 0
+          (New-Object Net.WebClient).DownloadFile("https://axiodl.com/files/$Filename", "$TempDir\$Filename")
+          Start-Process "$TempDir\$Filename" -ArgumentList "/S /D=$env:RUNNER_WORKSPACE\LLVM" -Wait
+
+      - name: Install dependencies
+        run: choco install ninja
+
+      - name: Enable Visual Studio environment
+        uses: ilammy/msvc-dev-cmd@v1
+
+      - name: Create build directory
+        run: cmake -E make_directory ${{github.workspace}}/build
+
+      - name: Configure CMake
+        run: |
+          $workspace = $env:RUNNER_WORKSPACE -replace '\\', '/'
+          cmake -B build -GNinja -DCMAKE_BUILD_TYPE=RelWithDebInfo `
+            -DCMAKE_MSVC_RUNTIME_LIBRARY=MultiThreaded `
+            -DLLVM_ROOT_DIR="$workspace/LLVM" .
+
+      - name: Build
+        run: cmake --build build
+
+      - name: Test
+        working-directory: build
+        run: ./atdna-test.exe
+
+      - name: Upload artifacts
+        uses: actions/upload-artifact@v2
+        with:
+          name: atdna-macos-x86_64
+          path: |
+            build/atdna/atdna.exe
+            build/atdna/atdna.pdb

atdna/CMakeLists.txt

@@ -9,14 +9,18 @@ list(REMOVE_ITEM ATDNA_DEFINES _GLIBCXX_DEBUG=1)
 set_directory_properties(PROPERTIES COMPILE_DEFINITIONS "${ATDNA_DEFINES}")
 
 # Find dependencies
-if(APPLE AND CMAKE_SYSTEM_PROCESSOR STREQUAL x86_64)
-  set(LLVM_HOMEBREW_PATH /usr/local/opt/llvm)
-elseif(APPLE AND CMAKE_SYSTEM_PROCESSOR STREQUAL arm64)
-  set(LLVM_HOMEBREW_PATH /opt/homebrew/opt/llvm)
-else()
-  set(LLVM_HOMEBREW_PATH "")
-endif()
-find_package(Clang REQUIRED PATHS ${LLVM_HOMEBREW_PATH})
+if (NOT "${LLVM_ROOT_DIR}" STREQUAL "")
+  # use existing LLVM_ROOT_DIR
+elseif (APPLE AND CMAKE_SYSTEM_PROCESSOR STREQUAL x86_64)
+  set(LLVM_ROOT_DIR /usr/local/opt/llvm)
+elseif (APPLE AND CMAKE_SYSTEM_PROCESSOR STREQUAL arm64)
+  set(LLVM_ROOT_DIR /opt/homebrew/opt/llvm)
+elseif (WIN32)
+  get_filename_component(LLVM_ROOT_DIR [HKEY_LOCAL_MACHINE\\Software\\LLVM\\LLVM] ABSOLUTE)
+else ()
+  set(LLVM_ROOT_DIR "")
+endif ()
+find_package(Clang REQUIRED PATHS ${LLVM_ROOT_DIR})
 find_package(LLVM REQUIRED PATHS ${CLANG_INSTALL_PREFIX})
 
 if(LLVM_FOUND)