Automate revendoring of Gems for Language Server

Previously the gem revendoring was manual.  This commit adds a rake task to
perform the revendoring instead.  The script also updates the READE format to
include the repo used to vendor the gem from.

Author: glennsarti

server/Rakefile

@@ -33,4 +33,57 @@ namespace :rubocop do
   end
 end
 
+desc "Download and vendor required gems"
+task :gem_revendor do
+  require 'fileutils'
+
+  gem_list = [
+    {
+      :directory => 'puppet-lint',
+      :github_repo => 'https://github.com/rodjek/puppet-lint.git',
+      :github_ref => '2.2.1',
+    }
+  ]
+
+  # Clean out the vendor directory first
+  puts "Clearing the vendor directory..."
+  vendor_dir = File.join(File.dirname(__FILE__),'vendor')
+  FileUtils.rm_rf(vendor_dir) if Dir.exists?(vendor_dir)
+  Dir.mkdir(vendor_dir)
+
+  gem_list.each do |vendor|
+    puts "Vendoring #{vendor[:directory]}..."
+    gem_dir = File.join(vendor_dir,vendor[:directory])
+    
+    sh "git clone #{vendor[:github_repo]} #{gem_dir}"
+    Dir.chdir(gem_dir) do
+      sh 'git fetch origin'
+      sh "git checkout #{vendor[:github_ref]}"
+    end
+
+    # Cleanup the gem directory...
+    FileUtils.rm_rf(File.join(gem_dir,'.git'))
+    FileUtils.rm_rf(File.join(gem_dir,'spec'))
+  end
+
+  # Generate the README
+  readme = <<-HEREDOC
+# Vendored Gems
+
+The puppet language server is designed to run within the Puppet Agent ruby environment which means no access to Native Extensions or Gem bundling.
+
+This means any Gems required outside of Puppet Agent for the language server must be vendored in this directory and the load path modified in the `puppet-languageserver` file.
+
+Note - To comply with Licensing, the Gem source should be MIT licensed or even more unrestricted.
+
+Note - To improve the packaging size, test files etc. were stripped from the Gems prior to committing.
+
+Gem List
+--------
+
+HEREDOC
+  gem_list.each { |vendor| readme += "* #{vendor[:directory]} (#{vendor[:github_repo]} ref #{vendor[:github_ref]})"}
+  File.open(File.join(vendor_dir,'README.md'), 'wb') { |file| file.write(readme + "\n") }
+end
+
 task :default => [:test]

server/vendor/README.md

@@ -11,4 +11,4 @@ Note - To improve the packaging size, test files etc. were stripped from the Gem
 Gem List
 --------
 
-* puppet-lint v2.2.1
+* puppet-lint (https://github.com/rodjek/puppet-lint.git ref 2.2.1)