gitlab-shell base implementation

.gitignore

+config.yml

config.yml.example

+user: git
+repos_path: "/home/git/repositories"

lib/gitlab_shell.rb

 require 'open3'
+require 'yaml'
+
 class GitlabShell
-  attr_accessor :username, :repo_name, :git_cmd
+  attr_accessor :username, :repo_name, :git_cmd, :repos_path
 
   def initialize
     @username = ARGV.shift
     @origin_cmd = ENV['SSH_ORIGINAL_COMMAND']
+    @config = YAML.load_file(File.join(ROOT_PATH, 'config.yml'))
+    @repos_path = @config['repos_path']
   end
 
   def exec
     if @origin_cmd
       parse_cmd
 
-      return system("git-upload-pack /home/gip/repositories/#{@repo_name}")
+      if git_cmds.include?(@git_cmd)
+        process_cmd
+      else
+        puts 'Not allowed command'
+      end
     else
       puts "Welcome #{@username}!"
     end
@@ -28,4 +36,9 @@ class GitlabShell
   def git_cmds
     %w(git-upload-pack git-receive-pack git-upload-archive)
   end
+
+  def process_cmd
+    repo_full_path = File.join(repos_path, repo_name)
+    system("#{@git_cmd} #{repo_full_path}")
+  end
 end