Include a mergit-standalone in the .gem

It's practically free since it'll compress to nothing (it's
all duplicate text).

.gitignore

@@ -1,5 +1,6 @@
 *.gem
 *.rbc
+/bin/mergit-standalone
 /.bundle/
 .config
 .yardoc

Rakefile

@@ -1,11 +1,28 @@
 require "bundler/gem_tasks"
 require "rspec/core/rake_task"
 require 'yard'
-
-RSpec::Core::RakeTask.new(:spec)
+require 'mergit'
 
 task :default => :spec
 
+def merge_file infile, outfile
+  mergit = Mergit.new(:search_path => ['lib'])
+  File.open(outfile, 'w', 0755) do |f|
+    f.write mergit.process_file(infile)
+  end
+end
+
+RSpec::Core::RakeTask.new(:spec)
+
 YARD::Rake::YardocTask.new do |t|
   t.files = ['lib/**/*.rb', '**/*.md']
 end
+
+desc "Build a standalone version of mergit"
+task :standalone => 'bin/mergit-standalone'
+
+file 'bin/mergit-standalone' => ['bin/mergit', 'Rakefile'] + Dir['lib/**/*.rb'] do
+  merge_file 'bin/mergit', 'bin/mergit-standalone'
+end
+
+task :build => :standalone

mergit.gemspec

@@ -14,7 +14,7 @@ Gem::Specification.new do |spec|
   spec.license       = "MIT"
 
   spec.files         = `git ls-files`.split($/)
-  spec.executables   = spec.files.grep(%r{^bin/}) { |f| File.basename(f) }
+  spec.executables   = spec.files.grep(%r{^bin/}) { |f| File.basename(f) } + ['mergit-standalone']
   spec.test_files    = spec.files.grep(%r{^(test|spec|features)/})
   spec.require_paths = ["lib"]