Merge pull request #2937 from sagmor/gem

Distribute MRuby's source as a Ruby gem

.gitignore

@@ -20,4 +20,4 @@ cscope.out
 /src/y.tab.c
 /bin
 /build
-/lib
+/mruby-source-*.gem

lib/mruby/source.rb

@@ -0,0 +1,30 @@
+require "pathname"
+
+module MRuby
+  module Source
+    # MRuby's source root directory
+    ROOT = Pathname.new(File.expand_path('../../../',__FILE__))
+
+    # Reads a constant defined at version.h
+    MRUBY_READ_VERSION_CONSTANT = Proc.new { |name| ROOT.join('include','mruby','version.h').read.match(/^#define #{name} +"?([\w\. ]+)"?$/)[1] }
+
+    MRUBY_RUBY_VERSION = MRUBY_READ_VERSION_CONSTANT['MRUBY_RUBY_VERSION']
+    MRUBY_RUBY_ENGINE = MRUBY_READ_VERSION_CONSTANT['MRUBY_RUBY_ENGINE']
+
+    MRUBY_RELEASE_MAJOR = Integer(MRUBY_READ_VERSION_CONSTANT['MRUBY_RELEASE_MAJOR'])
+    MRUBY_RELEASE_MINOR = Integer(MRUBY_READ_VERSION_CONSTANT['MRUBY_RELEASE_MINOR'])
+    MRUBY_RELEASE_TEENY = Integer(MRUBY_READ_VERSION_CONSTANT['MRUBY_RELEASE_TEENY'])
+
+    MRUBY_VERSION = [MRUBY_RELEASE_MAJOR,MRUBY_RELEASE_MINOR,MRUBY_RELEASE_TEENY].join('.')
+    MRUBY_RELEASE_NO = (MRUBY_RELEASE_MAJOR * 100 * 100 + MRUBY_RELEASE_MINOR * 100 + MRUBY_RELEASE_TEENY)
+
+    MRUBY_RELEASE_YEAR = Integer(MRUBY_READ_VERSION_CONSTANT['MRUBY_RELEASE_YEAR'])
+    MRUBY_RELEASE_MONTH = Integer(MRUBY_READ_VERSION_CONSTANT['MRUBY_RELEASE_MONTH'])
+    MRUBY_RELEASE_DAY = Integer(MRUBY_READ_VERSION_CONSTANT['MRUBY_RELEASE_DAY'])
+    MRUBY_RELEASE_DATE = [MRUBY_RELEASE_YEAR,MRUBY_RELEASE_MONTH,MRUBY_RELEASE_DAY].join('.')
+
+    MRUBY_BIRTH_YEAR = Integer(MRUBY_READ_VERSION_CONSTANT['MRUBY_BIRTH_YEAR'])
+
+    MRUBY_AUTHOR = MRUBY_READ_VERSION_CONSTANT['MRUBY_AUTHOR']
+  end
+end

mruby-source.gemspec

@@ -0,0 +1,18 @@
+# coding: utf-8
+lib = File.expand_path('../lib', __FILE__)
+$LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
+require 'mruby/source'
+
+Gem::Specification.new do |spec|
+  spec.name          = "mruby-source"
+  spec.version       = MRuby::Source::MRUBY_VERSION
+  spec.authors       = [ MRuby::Source::MRUBY_AUTHOR ]
+
+  spec.summary       = %q{MRuby source code wrapper.}
+  spec.description   = %q{MRuby source code wrapper for use with Ruby libs.}
+  spec.homepage      = "http://www.mruby.org/"
+  spec.license       = "MIT"
+
+  spec.files         = `git ls-files -z`.split("\x0")
+  spec.require_paths = ["lib"]
+end