catboost-model-cpp: 1.2.7

Formula/catboost-model-cpp.rb

@@ -0,0 +1,76 @@
+require "yaml"
+
+module ::Utils
+  def self.add_clang_version_to_conan_settings(version)
+    system "conan", "config", "init"
+    conan_home = safe_popen_read("conan", "config", "home").strip
+    settings_file = "#{conan_home}/settings.yml"
+    settings = YAML.load_file(settings_file, aliases: true)
+    clang_versions = settings["compiler"]["clang"]["version"]
+    unless clang_versions.include?(version)
+      clang_versions << version
+      File.write(settings_file, YAML.dump(settings))
+    end
+  end
+end
+
+class CatboostModelCpp < Formula
+  desc "Gradient Boosting on Decision Trees C++ Model Library"
+  homepage "https://catboost.ai"
+  url "https://github.com/catboost/catboost.git",
+      tag:      "v1.2.7",
+      revision: "f903943a8cd903a117c3d3c8421cc72d3910562c"
+  license "Apache-2.0"
+  head "https://github.com/catboost/catboost.git", branch: "master"
+
+  depends_on "cmake" => :build
+  depends_on "conan@1" => :build
+  depends_on "ninja" => :build
+
+  uses_from_macos "llvm" => :build
+
+  def install
+    Utils.add_clang_version_to_conan_settings(Formula["llvm"].version.major.to_s) if ENV.key?("GITHUB_ACTIONS")
+
+    args = [
+      "-DCATBOOST_COMPONENTS=libs",
+      "-DHAVE_CUDA=NO",
+      "-DCMAKE_POSITION_INDEPENDENT_CODE=On",
+      "-DCMAKE_TOOLCHAIN_FILE=#{buildpath}/build/toolchains/clang.toolchain",
+    ]
+
+    cmakepath = buildpath/"cmake-build"
+    system "cmake", "-S", ".", "-B", cmakepath, "-G", "Ninja", *args, *std_cmake_args
+    system "ninja", "-C", cmakepath, "catboostmodel"
+
+    lib.install cmakepath/"catboost/libs/model_interface/libcatboostmodel.dylib"
+    %w[c_api.h wrapped_calcer.h].each do |header|
+      (include/"catboost/model_interface").install Dir[buildpath/"catboost/libs/model_interface/#{header}"]
+    end
+  end
+
+  test do
+    (testpath/"test.cpp").write <<~EOS
+      #include <catboost/model_interface/wrapped_calcer.h>
+      #include <iostream>
+
+      int main(int argc, char** argv) {
+          {
+              ModelCalcerWrapper calcer;
+              calcer.init_from_file("model.bin");
+              std::cout << calcer.CalcFlat(std::vector<float>(100)) << std::endl;
+              std::cout << calcer.CalcFlat(std::vector<float>(100, 1.0f)) << std::endl;
+          }
+          {
+              ModelCalcerWrapper calcer("model.bin");
+              std::vector<std::string> catFeatures = {"1", "2", "3"};
+              std::cout << calcer.Calc(std::vector<float>(100), catFeatures) << std::endl;
+              std::cout << calcer.Calc(std::vector<float>(100, 1.0f), std::vector<std::string>()) << std::endl;
+          }
+          return 0;
+      }
+    EOS
+    system ENV.cxx, "test.cpp", "-std=c++1y", "-L#{lib}", "-o", "test"
+    system "./test"
+  end
+end