snapshot of https://github.com/ggml-org/whisper.cpp.git @ da54572229bcf64ba367d96c7ef15770376c4280 (2026-09-15)

bindings/ruby/ext/options.rb

@@ -0,0 +1,125 @@
+require "fileutils"
+
+class Options
+  def initialize(cmake="cmake")
+    @cmake = cmake
+    @options = {}
+
+    configure
+    write_cache_file
+  end
+
+  def to_a
+    [
+      "-D", "BUILD_SHARED_LIBS=OFF",
+      "-D", "WHISPER_BUILD_TESTS=OFF",
+      "-D", "CMAKE_ARCHIVE_OUTPUT_DIRECTORY=#{__dir__}",
+      "-D", "CMAKE_POSITION_INDEPENDENT_CODE=ON",
+      "-C", cache_path
+    ]
+  end
+
+  def to_s
+    command_line(*to_a)
+  end
+
+  def graphviz_cmake_args
+    []
+  end
+
+  private
+
+  def cmake_options
+    @cmake_options ||= cmake_options_output.lines.drop_while {|line| line.chomp != "-- Cache values"}.drop(1)
+                       .filter_map {|line|
+                         option, value = line.chomp.split("=", 2)
+                         name, type = option.split(":", 2)
+                         [
+                           name,
+                           [
+                             type,
+                             type == "BOOL" ? value == "ON" : value
+                           ]
+                         ]
+                       }.to_h
+  end
+
+  def cmake_options_output
+    Dir.chdir(__dir__) do
+      IO.popen([@cmake, "-S", "sources", "-B", "build", "-L"]) {|io| io.read}
+    end
+  end
+
+  def configure
+    cmake_options.each_pair do |name, (type, default_value)|
+      option = option_name(name)
+      value = type == "BOOL" ? enable_config(option) : arg_config("--#{option}")
+      @options[name] = [type, value]
+    end
+
+    configure_accelerate
+    configure_metal
+    configure_coreml
+  end
+
+  # See ggml/src/ggml-cpu/CMakeLists.txt
+  def configure_accelerate
+    if RUBY_PLATFORM.match?(/darwin/) && enabled?("GGML_ACCELERATE")
+      $LDFLAGS << " -framework Accelerate"
+    end
+  end
+
+  # See ggml/src/ggml-metal/CMakeLists.txt
+  def configure_metal
+    $LDFLAGS << " -framework Foundation -framework Metal -framework MetalKit" if enabled?("GGML_METAL")
+  end
+
+  # See src/CmakeLists.txt
+  def configure_coreml
+    if enabled?("WHISPER_COREML")
+      $LDFLAGS << " -framework Foundation -framework CoreML"
+      $defs << "-DRUBY_WHISPER_USE_COREML"
+    end
+  end
+
+  def option_name(name)
+    name.downcase.gsub("_", "-")
+  end
+
+  def enabled?(option)
+    op = @options[option]
+    return false unless op
+    return false unless op[0] == "BOOL"
+    if op[1].nil?
+      cmake_options[option][1]
+    else
+      op[1]
+    end
+  end
+
+  def cache_path
+    File.join(__dir__, "sources", "Options.cmake")
+  end
+
+  def write_cache_file
+    FileUtils.mkpath File.dirname(cache_path)
+    File.open cache_path, "w" do |file|
+      @options.reject {|name, (type, value)| value.nil?}.each do |name, (type, value)|
+        line = 'set(%<name>s %<value>s CACHE %<type>s "" FORCE)' %{
+          name:,
+          type:,
+          value: value == true ? "ON" : value == false ? "OFF" : escape_cmake(value)
+        }
+        file.puts line
+      end
+    end
+  end
+
+  def escape_cmake(str)
+    str.gsub(/[\\"]/, '\\\\\&')
+  end
+
+  def command_line(*args)
+    args.collect {|arg| %|"#{arg.to_s.gsub(/[\\"]/, '\\\\\&')}"|}.join(" ")
+  end
+end