feat: Add CMake support to C bindings (#247)

Co-authored-by: Matt Campbell <mattcampbell@pobox.com>

Author: DataTriny

.clang-format

@@ -3,7 +3,6 @@ Language:        Cpp
 # BasedOnStyle:  Google
 AccessModifierOffset: -1
 AlignAfterOpenBracket: Align
-AlignArrayOfStructures: None
 AlignConsecutiveMacros: None
 AlignConsecutiveAssignments: None
 AlignConsecutiveBitFields: None
@@ -12,6 +11,7 @@ AlignEscapedNewlines: Left
 AlignOperands:   Align
 AlignTrailingComments: true
 AllowAllArgumentsOnNextLine: true
+AllowAllConstructorInitializersOnNextLine: true
 AllowAllParametersOfDeclarationOnNextLine: true
 AllowShortEnumsOnASingleLine: true
 AllowShortBlocksOnASingleLine: Never
@@ -59,28 +59,23 @@ BreakAfterJavaFieldAnnotations: false
 BreakStringLiterals: true
 ColumnLimit:     80
 CommentPragmas:  '^ IWYU pragma:'
-QualifierAlignment: Leave
 CompactNamespaces: false
+ConstructorInitializerAllOnOneLineOrOnePerLine: true
 ConstructorInitializerIndentWidth: 4
 ContinuationIndentWidth: 4
 Cpp11BracedListStyle: true
 DeriveLineEnding: true
 DerivePointerAlignment: true
 DisableFormat:   false
-EmptyLineAfterAccessModifier: Never
 EmptyLineBeforeAccessModifier: LogicalBlock
 ExperimentalAutoDetectBinPacking: false
-PackConstructorInitializers: NextLine
-BasedOnStyle:    ''
-ConstructorInitializerAllOnOneLineOrOnePerLine: false
-AllowAllConstructorInitializersOnNextLine: true
 FixNamespaceComments: true
 ForEachMacros:
   - foreach
   - Q_FOREACH
   - BOOST_FOREACH
-IfMacros:
-  - KJ_IF_MAYBE
+StatementAttributeLikeMacros:
+  - Q_EMIT
 IncludeBlocks:   Regroup
 IncludeCategories:
   - Regex:           '^<ext/.*\.h>'
@@ -101,7 +96,6 @@ IncludeCategories:
     CaseSensitive:   false
 IncludeIsMainRegex: '([-_](test|unittest))?$'
 IncludeIsMainSourceRegex: ''
-IndentAccessModifiers: false
 IndentCaseLabels: true
 IndentCaseBlocks: false
 IndentGotoLabels: true
@@ -114,7 +108,6 @@ InsertTrailingCommas: None
 JavaScriptQuotes: Leave
 JavaScriptWrapImports: true
 KeepEmptyLinesAtTheStartOfBlocks: false
-LambdaBodyIndentation: Signature
 MacroBlockBegin: ''
 MacroBlockEnd:   ''
 MaxEmptyLinesToKeep: 1
@@ -128,14 +121,12 @@ PenaltyBreakAssignment: 2
 PenaltyBreakBeforeFirstCallParameter: 1
 PenaltyBreakComment: 300
 PenaltyBreakFirstLessLess: 120
-PenaltyBreakOpenParenthesis: 0
 PenaltyBreakString: 1000
 PenaltyBreakTemplateDeclaration: 10
 PenaltyExcessCharacter: 1000000
 PenaltyReturnTypeOnItsOwnLine: 200
 PenaltyIndentedWhitespace: 0
 PointerAlignment: Left
-PPIndentWidth:   -1
 RawStringFormats:
   - Language:        Cpp
     Delimiters:
@@ -164,14 +155,10 @@ RawStringFormats:
       - ParseTextProtoOrDie
       - ParseTestProto
       - ParsePartialTestProto
-    CanonicalDelimiter: pb
+    CanonicalDelimiter: ''
     BasedOnStyle:    google
-ReferenceAlignment: Pointer
 ReflowComments:  true
-RemoveBracesLLVM: false
-SeparateDefinitionBlocks: Leave
-ShortNamespaceLines: 1
-SortIncludes:    CaseSensitive
+SortIncludes:    true
 SortJavaStaticImport: Before
 SortUsingDeclarations: true
 SpaceAfterCStyleCast: false
@@ -183,33 +170,20 @@ SpaceBeforeCpp11BracedList: false
 SpaceBeforeCtorInitializerColon: true
 SpaceBeforeInheritanceColon: true
 SpaceBeforeParens: ControlStatements
-SpaceBeforeParensOptions:
-  AfterControlStatements: true
-  AfterForeachMacros: true
-  AfterFunctionDefinitionName: false
-  AfterFunctionDeclarationName: false
-  AfterIfMacros:   true
-  AfterOverloadedOperator: false
-  BeforeNonEmptyParentheses: false
 SpaceAroundPointerQualifiers: Default
 SpaceBeforeRangeBasedForLoopColon: true
 SpaceInEmptyBlock: false
 SpaceInEmptyParentheses: false
 SpacesBeforeTrailingComments: 2
-SpacesInAngles:  Never
+SpacesInAngles:  false
 SpacesInConditionalStatement: false
 SpacesInContainerLiterals: true
 SpacesInCStyleCastParentheses: false
-SpacesInLineCommentPrefix:
-  Minimum:         1
-  Maximum:         -1
 SpacesInParentheses: false
 SpacesInSquareBrackets: false
 SpaceBeforeSquareBrackets: false
 BitFieldColonSpacing: Both
 Standard:        Auto
-StatementAttributeLikeMacros:
-  - Q_EMIT
 StatementMacros:
   - Q_UNUSED
   - QT_REQUIRE_VERSION
@@ -223,3 +197,4 @@ WhitespaceSensitiveMacros:
   - NS_SWIFT_NAME
   - CF_SWIFT_NAME
 ...
+

.github/workflows/bindings.yml

@@ -12,53 +12,44 @@ jobs:
         include:
           - os: macOS-latest
             target: aarch64-apple-darwin
+            cmake-options: -DCMAKE_OSX_ARCHITECTURES=arm64
             path: macos/arm64
-            shared-ext: dylib
-            static-ext: a
           - os: macOS-latest
             target: x86_64-apple-darwin
             path: macos/x86_64
-            shared-ext: dylib
-            static-ext: a
           - os: windows-2019
             target: aarch64-pc-windows-msvc
+            setup-step: 'cmd.exe /k "C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise\VC\Auxiliary\Build\vcvarsamd64_x86.bat" `& powershell'
+            cmake-options: -A ARM64
             path: windows/arm64/msvc
-            shared-ext: dll
-            static-ext: lib
           - os: windows-2019
             target: i686-pc-windows-msvc
+            setup-step: 'cmd.exe /k "C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise\VC\Auxiliary\Build\vcvars32.bat" `& powershell'
+            cmake-options: -A Win32
             path: windows/x86/msvc
-            shared-ext: dll
-            static-ext: lib
           - os: windows-2019
             target: x86_64-pc-windows-msvc
+            setup-step: 'cmd.exe /k "C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise\VC\Auxiliary\Build\vcvars64.bat" `& powershell'
             path: windows/x86_64/msvc
-            shared-ext: dll
-            static-ext: lib
           - os: ubuntu-latest
             target: i686-pc-windows-gnu
-            use-cross: true
+            setup-step: sudo apt update && sudo apt install -y mingw-w64
+            cmake-options: -DCMAKE_SYSTEM_NAME=Windows -DCMAKE_SYSTEM_PROCESSOR=x86 -DCMAKE_C_COMPILER=i686-w64-mingw32-gcc -DCMAKE_CXX_COMPILER=i686-w64-mingw32-g++
             path: windows/x86/mingw
-            shared-ext: dll
-            static-ext: a
           - os: ubuntu-latest
             target: x86_64-pc-windows-gnu
-            use-cross: true
+            setup-step: sudo apt update && sudo apt install -y mingw-w64
+            cmake-options: -DCMAKE_SYSTEM_NAME=Windows -DCMAKE_SYSTEM_PROCESSOR=x86_64 -DCMAKE_C_COMPILER=x86_64-w64-mingw32-gcc -DCMAKE_CXX_COMPILER=x86_64-w64-mingw32-g++
             path: windows/x86_64/mingw
-            shared-ext: dll
-            static-ext: a
           - os: ubuntu-latest
             target: i686-unknown-linux-gnu
-            use-cross: true
+            setup-step: sudo apt update && sudo apt install -y gcc-multilib g++-multilib
+            cmake-options: -DCMAKE_SYSTEM_NAME=Linux -DCMAKE_SYSTEM_PROCESSOR=x86
             path: linux/x86
-            shared-ext: so
-            static-ext: a
           - os: ubuntu-latest
             target: x86_64-unknown-linux-gnu
             path: linux/x86_64
-            shared-ext: so
-            static-ext: a
-    name: cargo build
+    name: Build
     steps:
       - uses: actions/checkout@v3
 
@@ -70,34 +61,18 @@ jobs:
           profile: minimal
           override: true
 
-      - name: cargo build
-        uses: actions-rs/cargo@v1
-        with:
-          command: build
-          use-cross: ${{ matrix.use-cross || false }}
-          args: --package accesskit_c --release --target ${{ matrix.target }}
-
-      - shell: bash
-        run: |
-          mkdir -p artifacts/${{ matrix.path }}/shared
-          mkdir -p artifacts/${{ matrix.path }}/static
-
-      - if: startsWith(matrix.os, 'windows')
+      - name: build libraries
         run: |
-          mv target/${{ matrix.target }}/release/accesskit.dll.lib artifacts/${{ matrix.path }}/shared/accesskit.lib
-          mv target/${{ matrix.target }}/release/*.pdb artifacts/${{ matrix.path }}/shared
-      - if: contains(matrix.path, 'mingw')
-        run: mv target/${{ matrix.target }}/release/libaccesskit.dll.a artifacts/${{ matrix.path }}/shared/libaccesskit.a
-
-      - run: |
-          mv target/${{ matrix.target }}/release/*.${{ matrix.shared-ext }} artifacts/${{ matrix.path }}/shared
-          mv target/${{ matrix.target }}/release/*.${{ matrix.static-ext }} artifacts/${{ matrix.path }}/static
+          ${{ matrix.setup-step || '' }}
+          cmake -S bindings/c -B build -DACCESSKIT_BUILD_HEADERS=OFF -DRust_CARGO_TARGET=${{ matrix.target }} ${{ matrix.cmake-options || '' }} ${{ !contains(matrix.target, 'msvc') && '-DCMAKE_BUILD_TYPE=Release' || '' }}
+          cmake --build build ${{ contains(matrix.target, 'msvc') && '--config Release' || '' }}
+          cmake --install build ${{ contains(matrix.target, 'msvc') && '--config Release' || '' }}
 
       - name: Upload binaries
         uses: actions/upload-artifact@v3
         with:
           name: ${{ matrix.target }}
-          path: artifacts
+          path: bindings/c/lib
 
   generate-headers:
     if: startsWith(github.ref_name, 'accesskit_c-v')
@@ -119,6 +94,7 @@ jobs:
           mv artifacts/headers accesskit_c/include
           cp -r artifacts/*/* accesskit_c/lib
           cp -r bindings/c/examples accesskit_c/
+          cp bindings/c/accesskit*.cmake accesskit_c/
           cp bindings/c/*.md accesskit_c/
           cp LICENSE* accesskit_c/
           mv accesskit_c ${{ github.ref_name }}

.github/workflows/generate-headers.yml

@@ -18,7 +18,9 @@ jobs:
     - uses: dtolnay/install@master
       with:
         crate: cbindgen
-    - run: make -C bindings/c include/accesskit.h
+    - run: cmake -S bindings/c -B build -DACCESSKIT_BUILD_LIBRARIES=OFF
+    - run: cmake --build build
+    - run: cmake --install build
 
     - name: Upload header file
       uses: actions/upload-artifact@v3

Cargo.toml

@@ -12,6 +12,7 @@ default-members = [
     "common",
     "consumer",
     "platforms/winit",
+    "bindings/c",
 ]
 
 [profile.release]

bindings/c/.cargo/config.toml

@@ -0,0 +1,9 @@
+[target.aarch64-apple-darwin]
+rustflags = [
+  "-C", "link-arg=-Wl,-install_name,@rpath/libaccesskit.dylib",
+]
+
+[target.x86_64-apple-darwin]
+rustflags = [
+  "-C", "link-arg=-Wl,-install_name,@rpath/libaccesskit.dylib",
+]

bindings/c/.gitignore

@@ -1,2 +1,3 @@
-
-include
+build
+include
+lib

bindings/c/CMakeLists.txt

@@ -0,0 +1,66 @@
+cmake_minimum_required(VERSION 3.20)
+
+project(accesskit_c)
+
+option(ACCESSKIT_BUILD_HEADERS "Whether to build header files" ON)
+option(ACCESSKIT_BUILD_LIBRARIES "Whether to build libraries" ON)
+
+if (ACCESSKIT_BUILD_LIBRARIES)
+    include(FetchContent)
+
+    FetchContent_Declare(
+        Corrosion
+        GIT_REPOSITORY https://github.com/corrosion-rs/corrosion.git
+        GIT_TAG v0.3.5
+    )
+    FetchContent_MakeAvailable(Corrosion)
+
+    set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR})
+    set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR})
+    set(CMAKE_PDB_OUTPUT_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR})
+    corrosion_import_crate(MANIFEST_PATH Cargo.toml)
+endif()
+
+if (ACCESSKIT_BUILD_HEADERS)
+    find_program(RUSTUP rustup)
+    find_program(CBINDGEN cbindgen)
+    find_program(CLANG_FORMAT clang-format)
+
+    add_custom_target(headers ALL
+        COMMAND ${RUSTUP} run nightly ${CBINDGEN} --crate accesskit_c --output accesskit.hpp "${CMAKE_SOURCE_DIR}"
+        COMMAND ${CLANG_FORMAT} -i accesskit.hpp
+        COMMAND ${CMAKE_COMMAND} -E rename accesskit.hpp accesskit.h
+        BYPRODUCTS accesskit.h
+    )
+
+    if (ACCESSKIT_BUILD_LIBRARIES)
+        add_dependencies(cargo-prebuild_accesskit headers)
+    endif()
+endif()
+
+include("accesskit.cmake")
+
+if (ACCESSKIT_BUILD_HEADERS)
+    install(FILES
+        "${CMAKE_CURRENT_BINARY_DIR}/accesskit.h"
+        DESTINATION "${ACCESSKIT_INCLUDE_DIR}"
+    )
+endif()
+
+if (ACCESSKIT_BUILD_LIBRARIES)
+    install(FILES
+        "$<TARGET_PROPERTY:accesskit-static,IMPORTED_LOCATION>"
+        DESTINATION "${ACCESSKIT_LIBRARIES_DIR}/static"
+    )
+
+    install(FILES
+        "$<TARGET_PROPERTY:accesskit-shared,IMPORTED_LOCATION>"
+        "$<$<STREQUAL:${_accesskit_toolchain},msvc>:${CMAKE_CURRENT_BINARY_DIR}/accesskit.pdb>"
+        DESTINATION "${ACCESSKIT_LIBRARIES_DIR}/shared"
+    )
+    install(FILES
+        "$<$<NOT:$<STREQUAL:$<TARGET_PROPERTY:accesskit-shared,IMPORTED_IMPLIB>,>>:$<TARGET_PROPERTY:accesskit-shared,IMPORTED_IMPLIB>>"
+        RENAME "libaccesskit.a"
+        DESTINATION "${ACCESSKIT_LIBRARIES_DIR}/shared"
+    )
+endif()