build: added homebrew formula package format to build

Author: Richard Pospesel

.github/workflows/build.yml

@@ -124,7 +124,7 @@ jobs:
         run: |
           mkdir -p build/debug
           cd build/debug
-          cmake ../.. -G "Unix Makefiles"  -DCMAKE_BUILD_TYPE=Debug -DCMAKE_INSTALL_PREFIX=../../dist/debug -DBUILD_PYTHON_BINDINGS=ON -DBUILD_JAVA_BINDINGS=ON -DBUILD_EXAMPLES=ON
+          cmake ../.. -G "Unix Makefiles"  -DCMAKE_BUILD_TYPE=Debug -DCMAKE_INSTALL_PREFIX=../../dist/debug -DBUILD_PYTHON_BINDINGS=ON -DBUILD_JAVA_BINDINGS=ON -DBUILD_EXAMPLES=ON -DBUILD_HOMEBREW_FORMULA=ON
           make
           make install
       - name: Archive Debug
@@ -140,7 +140,7 @@ jobs:
         run: |
           mkdir -p build/release
           cd build/release
-          cmake ../.. -G "Unix Makefiles"  -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=../../dist/release -DBUILD_PYTHON_BINDINGS=ON -DBUILD_JAVA_BINDINGS=ON -DBUILD_EXAMPLES=ON
+          cmake ../.. -G "Unix Makefiles"  -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=../../dist/release -DBUILD_PYTHON_BINDINGS=ON -DBUILD_JAVA_BINDINGS=ON -DBUILD_EXAMPLES=ON -DBUILD_HOMEBREW_FORMULA=ON
           make
           make install
       - name: Archive Release

CMakeLists.txt

@@ -76,6 +76,7 @@ option(BUILD_EXAMPLES "Build example targets" OFF)
 
 # Packages options
 option(BUILD_DEBIAN_SOURCE_PACKAGE "Build debian cgosling source package" OFF)
+option(BUILD_HOMEBREW_FORMULA "Build homebrew flask formula" OFF)
 
 # Documentation options
 option(BUILD_PAGES "Build webpages" OFF)

README.md

@@ -191,6 +191,16 @@ The following additional dependencies are required for this configure option:
 
 See [source/packages/debian-source/README.md](source/packages/debian-source/README.md) for additional information.
 
+### BUILD_HOMEBREW_FORMULA
+
+```shell
+cmake -DBUILD_HOMEBREW_FORMULA=ON
+```
+
+Builds a homebrew flask formula which installs libcgosling static libs, shared libs, and developemnt headers.
+
+See [source/packages/homebrew-formula/README.md](source/packages/homebrew-formula/README.md) for more additional information.
+
 ### BUILD_PAGES
 
 ```shell

source/packages/CMakeLists.txt

@@ -1 +1,2 @@
 add_subdirectory(debian-source)
+add_subdirectory(homebrew-formula)

source/packages/homebrew-formula/CMakeLists.txt

@@ -0,0 +1,9 @@
+if (BUILD_HOMEBREW_FORMULA)
+    # generate homebrew formula .rb file
+    set(LIBCGOSLING_RB_IN ${CMAKE_CURRENT_SOURCE_DIR}/libcgosling.rb.in)
+    set(LIBCGOSLING_RB_OUT ${CMAKE_CURRENT_BINARY_DIR}/libcgosling.rb)
+    configure_file(${LIBCGOSLING_RB_IN} ${LIBCGOSLING_RB_OUT} @ONLY)
+
+    install(FILES ${LIBCGOSLING_RB_OUT}
+        DESTINATION ${CMAKE_INSTALL_DATADIR}/gosling/packages/homebrew-formula)
+endif()

source/packages/homebrew-formula/README.md

@@ -0,0 +1,9 @@
+# homebrew-formula
+
+This buillds a homebrew formula for the cgosling crate which can be used to install the libcgosling shared libs, static libs, and development headers.
+
+## Building flask
+
+```bash
+brew install --build-from-source --formula /path/to/libcgosling.rb
+```

source/packages/homebrew-formula/libcgosling.rb.in

@@ -0,0 +1,40 @@
+class Libcgosling < Formula
+  desc ""
+  homepage "https://gosling.technology"
+  url "https://github.com/blueprint-freespeech/gosling.git", tag: "cgosling-v@CGOSLING_VERSION@"
+  license "BSD-3-Clause"
+
+  depends_on "rust" => :build
+  depends_on "cmake" => :build
+  depends_on "tor"
+
+  def install
+    system "cmake",
+      "-S", ".",
+      "-B", "build",
+      "-DCMAKE_BUILD_TYPE=Release",
+      *std_cmake_args
+    system "cmake", "--build", "build"
+    system "cmake", "--install", "build"
+  end
+
+  test do
+    (testpath/"test.cpp").write <<~EOS
+      #include <cgosling.hpp>
+
+      int main() {
+        gosling_library* library = nullptr;
+        gosling_error* error = nullptr;
+        ::gosling_library_init(&library, &error);
+        if (library != nullptr && error == nullptr) {
+          gosling_library_free(library);
+        } else {
+          return -1;
+        }
+        return 0;
+      }
+    EOS
+    system ENV.cxx, "-std=c++17", "test.cpp", "-I#{include}", "-L#{lib}", "-lcgosling", "-o", "test"
+    system "./test"
+  end
+end