initial commit

.gitignore

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+/.bundle/
+/.yardoc
+/Gemfile.lock
+/_yardoc/
+/coverage/
+/doc/
+/pkg/
+/spec/reports/
+/tmp/

.travis.yml

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+sudo: false
+language: ruby
+rvm:
+  - 2.3.1
+before_install: gem install bundler -v 1.12.0

CODE_OF_CONDUCT.md

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+# Contributor Code of Conduct
+
+As contributors and maintainers of this project, and in the interest of
+fostering an open and welcoming community, we pledge to respect all people who
+contribute through reporting issues, posting feature requests, updating
+documentation, submitting pull requests or patches, and other activities.
+
+We are committed to making participation in this project a harassment-free
+experience for everyone, regardless of level of experience, gender, gender
+identity and expression, sexual orientation, disability, personal appearance,
+body size, race, ethnicity, age, religion, or nationality.
+
+Examples of unacceptable behavior by participants include:
+
+* The use of sexualized language or imagery
+* Personal attacks
+* Trolling or insulting/derogatory comments
+* Public or private harassment
+* Publishing other's private information, such as physical or electronic
+  addresses, without explicit permission
+* Other unethical or unprofessional conduct
+
+Project maintainers have the right and responsibility to remove, edit, or
+reject comments, commits, code, wiki edits, issues, and other contributions
+that are not aligned to this Code of Conduct, or to ban temporarily or
+permanently any contributor for other behaviors that they deem inappropriate,
+threatening, offensive, or harmful.
+
+By adopting this Code of Conduct, project maintainers commit themselves to
+fairly and consistently applying these principles to every aspect of managing
+this project. Project maintainers who do not follow or enforce the Code of
+Conduct may be permanently removed from the project team.
+
+This code of conduct applies both within project spaces and in public spaces
+when an individual is representing the project or its community.
+
+Instances of abusive, harassing, or otherwise unacceptable behavior may be
+reported by contacting a project maintainer at sam.saffron@gmail.com. All
+complaints will be reviewed and investigated and will result in a response that
+is deemed necessary and appropriate to the circumstances. Maintainers are
+obligated to maintain confidentiality with regard to the reporter of an
+incident.
+
+This Code of Conduct is adapted from the [Contributor Covenant][homepage],
+version 1.3.0, available at
+[http://contributor-covenant.org/version/1/3/0/][version]
+
+[homepage]: http://contributor-covenant.org
+[version]: http://contributor-covenant.org/version/1/3/0/

Gemfile

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+source 'https://rubygems.org'
+
+# Specify your gem's dependencies in mini_racer.gemspec
+gemspec

LICENSE.txt

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+The MIT License (MIT)
+
+Copyright (c) 2016 TODO: Write your name
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

README.md

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+# MiniRacer
+
+Welcome to your new gem! In this directory, you'll find the files you need to be able to package up your Ruby library into a gem. Put your Ruby code in the file `lib/mini_racer`. To experiment with that code, run `bin/console` for an interactive prompt.
+
+TODO: Delete this and the text above, and describe your gem
+
+## Installation
+
+Add this line to your application's Gemfile:
+
+```ruby
+gem 'mini_racer'
+```
+
+And then execute:
+
+    $ bundle
+
+Or install it yourself as:
+
+    $ gem install mini_racer
+
+## Usage
+
+TODO: Write usage instructions here
+
+## Development
+
+After checking out the repo, run `bin/setup` to install dependencies. Then, run `rake test` to run the tests. You can also run `bin/console` for an interactive prompt that will allow you to experiment.
+
+To install this gem onto your local machine, run `bundle exec rake install`. To release a new version, update the version number in `version.rb`, and then run `bundle exec rake release`, which will create a git tag for the version, push git commits and tags, and push the `.gem` file to [rubygems.org](https://rubygems.org).
+
+## Contributing
+
+Bug reports and pull requests are welcome on GitHub at https://github.com/[USERNAME]/mini_racer. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the [Contributor Covenant](http://contributor-covenant.org) code of conduct.
+
+
+## License
+
+The gem is available as open source under the terms of the [MIT License](http://opensource.org/licenses/MIT).
+

Rakefile

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+require "bundler/gem_tasks"
+require "rake/testtask"
+require "rake/extensiontask"
+
+Rake::TestTask.new(:test) do |t|
+  t.libs << "test"
+  t.libs << "lib"
+  t.test_files = FileList['test/**/*_test.rb']
+end
+
+task :default => :test
+
+gem = Gem::Specification.load( File.dirname(__FILE__) + '/mini_racer.gemspec' )
+Rake::ExtensionTask.new( 'mini_racer_extension', gem )
+

bin/console

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+#!/usr/bin/env ruby
+
+require "bundler/setup"
+require "mini_racer"
+
+# You can add fixtures and/or initialization code here to make experimenting
+# with your gem easier. You can also use a different console, if you like.
+
+# (If you use this, don't forget to add pry to your Gemfile!)
+# require "pry"
+# Pry.start
+
+require "irb"
+IRB.start

bin/setup

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+#!/usr/bin/env bash
+set -euo pipefail
+IFS=$'\n\t'
+set -vx
+
+bundle install
+
+# Do any other automated setup that you need to do here

ext/mini_racer_extension/extconf.rb

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+require 'mkmf'
+
+have_library('pthread')
+have_library('objc') if RUBY_PLATFORM =~ /darwin/
+$CPPFLAGS += " -Wall" unless $CPPFLAGS.split.include? "-Wall"
+$CPPFLAGS += " -g" unless $CPPFLAGS.split.include? "-g"
+$CPPFLAGS += " -rdynamic" unless $CPPFLAGS.split.include? "-rdynamic"
+$CPPFLAGS += " -fPIC" unless $CPPFLAGS.split.include? "-rdynamic" or RUBY_PLATFORM =~ /darwin/
+$CPPFLAGS += " -std=c++0x"
+$CPPFLAGS += " -fpermissive"
+
+CONFIG['LDSHARED'] = '$(CXX) -shared' unless RUBY_PLATFORM =~ /darwin/
+if CONFIG['warnflags']
+  CONFIG['warnflags'].gsub!('-Wdeclaration-after-statement', '')
+  CONFIG['warnflags'].gsub!('-Wimplicit-function-declaration', '')
+end
+if enable_config('debug')
+  $CFLAGS += " -O0 -ggdb3"
+end
+
+LIBV8_COMPATIBILITY = '~> 5.0.71.35.0'
+
+begin
+  require 'rubygems'
+  gem 'libv8', LIBV8_COMPATIBILITY
+rescue Gem::LoadError
+  warn "Warning! Unable to load libv8 #{LIBV8_COMPATIBILITY}."
+rescue LoadError
+  warn "Warning! Could not load rubygems. Please make sure you have libv8 #{LIBV8_COMPATIBILITY} installed."
+ensure
+  require 'libv8'
+end
+
+Libv8.configure_makefile
+
+# Temp Hack
+find_header('v8.h', '/home/sam/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/libv8-5.0.71.35.0/vendor/v8/include')
+
+find_header('libplatform/libplatform.h', '/home/sam/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/libv8-5.0.71.35.0/vendor/v8/include')
+
+create_makefile 'mini_racer_extension'

ext/mini_racer_extension/mini_racer_extension.cc

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+#include <stdio.h>
+#include <ruby.h>
+#include <v8.h>
+#include <libplatform/libplatform.h>
+#include <ruby/encoding.h>
+
+using namespace v8;
+
+class ArrayBufferAllocator : public v8::ArrayBuffer::Allocator {
+ public:
+  virtual void* Allocate(size_t length) {
+    void* data = AllocateUninitialized(length);
+    return data == NULL ? data : memset(data, 0, length);
+  }
+  virtual void* AllocateUninitialized(size_t length) { return malloc(length); }
+  virtual void Free(void* data, size_t) { free(data); }
+};
+
+
+Platform* current_platform = NULL;
+ArrayBufferAllocator* allocator = NULL;
+Isolate* isolate = NULL;
+
+static void init_v8() {
+    if (current_platform == NULL) {
+	V8::InitializeICU();
+	current_platform = platform::CreateDefaultPlatform();
+	V8::InitializePlatform(current_platform);
+	V8::Initialize();
+	allocator = new ArrayBufferAllocator();
+
+	Isolate::CreateParams create_params;
+	create_params.array_buffer_allocator = allocator;
+	isolate = Isolate::New(create_params);
+
+    }
+}
+
+
+void shutdown_v8() {
+
+}
+
+static VALUE rb_context_eval(VALUE self, VALUE str) {
+    init_v8();
+
+    Isolate::Scope isolate_scope(isolate);
+    HandleScope handle_scope(isolate);
+    Persistent<Context>* persistent_context;
+
+    Data_Get_Struct(self, Persistent<Context>, persistent_context);
+    Local<v8::Context> context = Local<Context>::New(isolate, *persistent_context);
+
+    Context::Scope context_scope(context);
+
+    Local<String> eval = String::NewFromUtf8(isolate, RSTRING_PTR(str),
+					      NewStringType::kNormal, (int)RSTRING_LEN(str)).ToLocalChecked();
+
+    Local<Script> script = Script::Compile(context, eval).ToLocalChecked();
+
+
+    MaybeLocal<Value> initial_result = script->Run(context);
+
+    if (initial_result.IsEmpty()) {
+	// exception report about what happened
+	rb_raise(rb_eStandardError, "JavaScript Error");
+    }
+
+    Local<Value> result = initial_result.ToLocalChecked();
+
+    if (result->IsNull() || result->IsUndefined()){
+	return Qnil;
+    }
+
+    if (result->IsInt32()) {
+	return INT2FIX(result->Int32Value());
+    }
+
+    if (result->IsNumber()) {
+	return rb_float_new(result->NumberValue());
+    }
+
+    Local<String> rstr = result->ToString();
+    return rb_enc_str_new(*v8::String::Utf8Value(rstr), rstr->Utf8Length(), rb_enc_find("utf-8"));
+}
+
+void deallocate(void * context) {
+    Isolate::Scope isolate_scope(isolate);
+    HandleScope handle_scope(isolate);
+
+    Persistent<Context>* cast_context = context;
+
+    cast_context->Reset();
+    delete cast_context;
+}
+
+VALUE allocate(VALUE klass) {
+    init_v8();
+
+    Isolate::Scope isolate_scope(isolate);
+    HandleScope handle_scope(isolate);
+    Local<Context> context = Context::New(isolate);
+
+    Persistent<Context>* persistent_context = new Persistent<Context>();
+    persistent_context->Reset(isolate, context);
+
+    return Data_Wrap_Struct(klass, NULL, deallocate, (void*)persistent_context);
+}
+
+static VALUE
+rb_context_init(VALUE self) {
+
+    return self;
+}
+
+extern "C" {
+
+    void Init_mini_racer_extension ( void )
+    {
+	VALUE rb_mMiniRacer = rb_define_module("MiniRacer");
+	VALUE rb_cContext = rb_define_class_under(rb_mMiniRacer, "Context", rb_cObject);
+	rb_define_method(rb_cContext, "eval", rb_context_eval, 1);
+	rb_define_method(rb_cContext, "initialize", rb_context_init, 0);
+	rb_define_alloc_func(rb_cContext, allocate);
+    }
+
+}

lib/mini_racer.rb

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+require "mini_racer/version"
+require "mini_racer_extension"
+
+module MiniRacer
+  class JavaScriptError < StandardError; end
+end

lib/mini_racer/version.rb

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+module MiniRacer
+  VERSION = "0.1.0"
+end

mini_racer.gemspec

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+# coding: utf-8
+lib = File.expand_path('../lib', __FILE__)
+$LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
+require 'mini_racer/version'
+
+Gem::Specification.new do |spec|
+  spec.name          = "mini_racer"
+  spec.version       = MiniRacer::VERSION
+  spec.authors       = ["Sam Saffron"]
+  spec.email         = ["sam.saffron@gmail.com"]
+
+  spec.summary       = %q{Minimal embedded v8 for Ruby}
+  spec.description   = %q{Minimal embedded v8 engine for Ruby}
+  spec.homepage      = ""
+  spec.license       = "MIT"
+
+
+  spec.files         = `git ls-files -z`.split("\x0").reject { |f| f.match(%r{^(test|spec|features)/}) }
+  spec.bindir        = "exe"
+  spec.executables   = spec.files.grep(%r{^exe/}) { |f| File.basename(f) }
+  spec.require_paths = ["lib"]
+
+  spec.add_development_dependency "bundler", "~> 1.12"
+  spec.add_development_dependency "rake", "~> 10.0"
+  spec.add_development_dependency "minitest", "~> 5.0"
+  spec.add_development_dependency "rake-compiler"
+
+  spec.add_dependency 'libv8', '~> 5.0.71.0'
+  spec.require_paths = ["lib", "ext"]
+
+  spec.extensions = ["ext/mini_racer_extension/extconf.rb"]
+
+end

test/mini_racer_test.rb

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+require 'test_helper'
+
+class MiniRacerTest < Minitest::Test
+  def test_that_it_has_a_version_number
+    refute_nil ::MiniRacer::VERSION
+  end
+
+  def test_it_can_eval_int
+    context = MiniRacer::Context.new
+    assert_equal 2, context.eval('1+1')
+  end
+
+  def test_it_can_eval_string
+    context = MiniRacer::Context.new
+    assert_equal "1+1", context.eval('"1+1"')
+  end
+
+  def test_it_returns_useful_errors
+    context = MiniRacer::Context.new
+    assert_raises do
+      context.eval('var x=function(){boom;}; x()')
+    end
+  end
+
+  def test_floats
+    context = MiniRacer::Context.new
+    assert_equal 1.2, context.eval('1.2')
+  end
+
+  def test_it_remembers_stuff_in_context
+    context = MiniRacer::Context.new
+    context.eval('var x = function(){return 22;}')
+    assert_equal 22, context.eval('x()')
+  end
+
+end

test/test_helper.rb

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+$LOAD_PATH.unshift File.expand_path('../../lib', __FILE__)
+require 'mini_racer'
+
+require 'minitest/autorun'