Add bin and edit workflow

bin/gems/google-protobuf-4.29.3-x86_64-linux/lib/google/tasks/ffi.rake

@@ -0,0 +1,100 @@
+# # @param task [FFI::Compiler::CompileTask] task to configure
+def configure_common_compile_task(task)
+  if FileUtils.pwd.include? 'ext'
+    src_dir = '.'
+    third_party_path = 'third_party/utf8_range'
+  else
+    src_dir = 'ext/google/protobuf_c'
+    third_party_path = 'ext/google/protobuf_c/third_party/utf8_range'
+  end
+
+  task.add_include_path third_party_path
+  task.add_define 'NDEBUG'
+  task.cflags << "-std=gnu99 -O3"
+  [
+    :convert, :defs, :map, :message, :protobuf, :repeated_field, :wrap_memcpy
+  ].each { |file| task.exclude << "/#{file}.c" }
+  task.ext_dir = src_dir
+  task.source_dirs = [src_dir]
+  if RbConfig::CONFIG['target_os'] =~ /darwin|linux/
+    task.cflags << "-Wall -Wsign-compare -Wno-declaration-after-statement"
+  end
+end
+
+# FFI::CompilerTask's constructor walks the filesystem at task definition time
+# to create subtasks for each source file, so files from third_party must be
+# copied into place before the task is defined for it to work correctly.
+# TODO Is there a sane way to check for generated protos under lib too?
+def with_generated_files
+  expected_path = FileUtils.pwd.include?('ext') ? 'third_party/utf8_range' : 'ext/google/protobuf_c/third_party/utf8_range'
+  if File.directory?(expected_path)
+    yield
+  else
+    task :default do
+      # It is possible, especially in cases like the first invocation of
+      # `rake test` following `rake clean` or a fresh checkout that the
+      # `copy_third_party` task has been executed since initial task definition.
+      # If so, run the task definition block now and invoke it explicitly.
+      if File.directory?(expected_path)
+        yield
+        Rake::Task[:default].invoke
+      else
+        raise "Missing directory #{File.absolute_path(expected_path)}." +
+                " Did you forget to run `rake copy_third_party` before building" +
+                " native extensions?"
+      end
+    end
+  end
+end
+
+begin
+  require "ffi-compiler/compile_task"
+
+  desc "Compile Protobuf library for FFI"
+  namespace "ffi-protobuf" do
+    with_generated_files do
+      # Compile Ruby UPB separately in order to limit use of -DUPB_BUILD_API to one
+      # compilation unit.
+      desc "Compile UPB library for FFI"
+      namespace "ffi-upb" do
+        with_generated_files do
+          FFI::Compiler::CompileTask.new('ruby-upb') do |c|
+            configure_common_compile_task c
+            c.add_define "UPB_BUILD_API"
+            c.exclude << "/glue.c"
+            c.exclude << "/shared_message.c"
+            c.exclude << "/shared_convert.c"
+            if RbConfig::CONFIG['target_os'] =~ /darwin|linux/
+              c.cflags << "-fvisibility=hidden"
+            end
+          end
+        end
+      end
+
+      FFI::Compiler::CompileTask.new 'protobuf_c_ffi' do |c|
+        configure_common_compile_task c
+        # Ruby UPB was already compiled with different flags.
+        c.exclude << "/utf8_range.c"
+        c.exclude << "/ruby-upb.c"
+      end
+
+      # Setup dependencies so that the .o files generated by building ffi-upb are
+      # available to link here.
+      # TODO Can this be simplified? Can the single shared library be used
+      # instead of the object files?
+      protobuf_c_task = Rake::Task[:default]
+      protobuf_c_shared_lib_task = Rake::Task[protobuf_c_task.prereqs.last]
+      ruby_upb_shared_lib_task = Rake::Task[:"ffi-upb:default"].prereqs.first
+      Rake::Task[ruby_upb_shared_lib_task].prereqs.each do |dependency|
+        protobuf_c_shared_lib_task.prereqs.prepend dependency
+      end
+    end
+  end
+rescue LoadError
+  desc "Compile Protobuf library for FFI"
+  namespace "ffi-protobuf" do
+    task :default do
+      warn "Skipping build of FFI; `gem install ffi-compiler` to enable."
+    end
+  end
+end