feat: create fiddle gem adapter

lib/tebako-runtime.rb

@@ -43,6 +43,7 @@ module TebakoRuntime
 
   POST_REQUIRE_MAP = {
     "ffi" => "tebako-runtime/adapters/ffi",
+    "fiddle" => "tebako-runtime/adapters/fiddle",
     "jing" => "tebako-runtime/adapters/jing",
     "mn2pdf" => "tebako-runtime/adapters/mn2pdf",
     "mnconvert" => "tebako-runtime/adapters/mnconvert",

lib/tebako-runtime/adapters/fiddle.rb

@@ -0,0 +1,38 @@
+# frozen_string_literal: true
+
+# Copyright (c) 2024 [Ribose Inc](https://www.ribose.com).
+# All rights reserved.
+# This file is a part of tebako
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+# 1. Redistributions of source code must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+#    notice, this list of conditions and the following disclaimer in the
+#    documentation and/or other materials provided with the distribution.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+# TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS
+# BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+# POSSIBILITY OF SUCH DAMAGE.
+
+require_relative "../memfs"
+
+# Wrapper for Fiddle.dlopen method
+# If the library file to be mapped to is within memfs it is extracted to tmp folder
+module Fiddle
+  singleton_class.send(:alias_method, :dlopen_orig, :dlopen)
+
+  def self.dlopen(lib)
+    dlopen_orig(TebakoRuntime.extract_memfs(lib))
+  end
+end

spec/pass_through_spec.rb

@@ -25,6 +25,7 @@
 # ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 # POSSIBILITY OF SUCH DAMAGE.
 
+require "rspec"
 require "tebako-runtime"
 
 # rubocop:disable Metrics/BlockLength
@@ -59,5 +60,33 @@
       FFI::Platform.send(:remove_const, :PASS_THROUGH) if Object.const_defined?(:PASS_THROUGH)
     end
   end
+
+  it "is transparent for other gems in PASS_THROUGH mode" do
+    if RUBY_PLATFORM =~ /msys|mingw|cygwin/
+      if defined?(FFI)
+        FFI::Platform.send(:remove_const, :OS)
+        FFI::Platform.send(:remove_const, :ARCH)
+        FFI::Platform.send(:remove_const, :LIBPREFIX)
+        FFI::Platform.send(:remove_const, :LIBSUFFIX)
+        FFI::Platform.send(:remove_const, :PASS_THROUGH)
+      end
+      ENV["TEBAKO_PASS_THROUGH"] = "1"
+      require "fiddle"
+
+      expect(defined?(Fiddle)).to_not be_nil
+
+    end
+  end
+
+  after do
+    if RUBY_PLATFORM =~ /msys|mingw|cygwin/
+      ENV.delete("TEBAKO_PASS_THROUGH")
+      FFI::Platform.send(:remove_const, :OS) if Object.const_defined?(:OS)
+      FFI::Platform.send(:remove_const, :ARCH) if Object.const_defined?(:ARCH)
+      FFI::Platform.send(:remove_const, :LIBPREFIX) if Object.const_defined?(:LIBPREFIX)
+      FFI::Platform.send(:remove_const, :LIBSUFFIX) if Object.const_defined?(:LIBSUFFIX)
+      FFI::Platform.send(:remove_const, :PASS_THROUGH) if Object.const_defined?(:PASS_THROUGH)
+    end
+  end
 end
 # rubocop:enable Metrics/BlockLength

spec/runtime_spec.rb

@@ -123,6 +123,13 @@ def tmpdir_name
     Fiddle.dlopen("test_fiddle")
   end
 
+  it "provides an adapter for ffi gem" do
+    expect(TebakoRuntime).to receive(:extract_memfs).with("test_fiddle")
+    require "fiddle"
+    expect(Fiddle::Handle).to receive(:new).and_return(double("Fiddle::Handle"))
+    Fiddle.dlopen("test_fiddle")
+  end
+
   it "provides an adapter for ffi gem" do
     expect(TebakoRuntime).to receive(:extract_memfs).with("test_ffi")
     require "ffi"
@@ -165,6 +172,10 @@ def tmpdir_name
     TebakoRuntime::COMPILER_MEMFS = File.join(TebakoRuntime.full_gem_path("tebako-runtime"), "lib")
 
     tfile = File.join(TebakoRuntime.full_gem_path("tebako-runtime"), "lib", "cert", "cacert.pem.mozilla")
+    if RUBY_PLATFORM =~ /mswin|mingw/
+      allow(TebakoRuntime).to receive(:extract_memfs).with("kernel32.dll").and_call_original
+      allow(TebakoRuntime).to receive(:extract_memfs).with("advapi32.dll").and_call_original
+    end
     expect(TebakoRuntime).to receive(:extract_memfs).with(tfile).and_call_original
     require "net/http"
 

tebako-runtime.gemspec

@@ -61,6 +61,7 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency "rubocop-rubycw", "~> 0.1"
 
   spec.add_development_dependency "ffi", "~> 1.15"
+  spec.add_development_dependency "fiddle", "~> 1.0"
   spec.add_development_dependency "mn2pdf", "~> 1.79"
   spec.add_development_dependency "mnconvert", "~> 1.54"
   spec.add_development_dependency "ruby-jing", "~> 0.0.3"