2 files changed, 24 insertions, 0 deletions
diff --git a/lib/download.rb b/lib/download.rb
index 5777e64..6d1b7fb 100644
--- a/lib/download.rb
+++ b/lib/download.rb
@@ -7,6 +7,26 @@
 require_relative '../config/config'
 require_relative 'package'
 require 'net/http'
+require 'pathname'
+
+module SlackBuilder
+  extend Rake::FileUtilsExt
+
+  def self.clone(repo, package, tag_prefix = 'v')
+    repository = Pathname.new('pkg') + package.name_version
+
+    if repository.directory?
+      sh 'git', '-C', repository.to_path, 'remote', 'update', '--prune'
+    else
+      sh 'git', 'clone', repo, repository.to_path
+    end
+
+    sh 'git', '-C', repository.to_path, 'checkout', "#{tag_prefix}#{package.version}"
+    sh 'git', '-C', repository.to_path, 'submodule', 'update', '--init', '--recursive'
+
+    repository
+  end
+end
 
 def write_download(target, response)
   checksum = Digest::MD5.new
diff --git a/lib/package.rb b/lib/package.rb
index ab31ce6..39a36c6 100644
--- a/lib/package.rb
+++ b/lib/package.rb
@@ -17,6 +17,10 @@ class Package
   def name
     File.basename @path
   end
+
+  def name_version
+    "#{name}-#{@version}"
+  end
 end
 
 class Download