Fix cloning and checkout mechanism

Gemfile

@@ -1,3 +1,3 @@
 source 'https://rubygems.org'
 
-gem 'git'
+gem 'rugged'

build-docs.rb

@@ -2,7 +2,7 @@
 require 'optparse'
 require 'fileutils'
 require 'yaml'
-require 'git'
+require 'rugged'
 
 options = {}
 OptionParser.new { |opts|
@@ -30,16 +30,14 @@ OptionParser.new { |opts|
 
 def clone_and_update_project(target, clone_target, git, ref)
   if !File.directory?(clone_target)
-    puts "Cloning to #{target} to #{clone_target} ..."
+    puts "Cloning to #{target}: #{ref} to #{clone_target} ..."
     FileUtils.mkdir_p(clone_target)
-    repo = Git.clone(git, clone_target)
+    Rugged::Repository.clone_at(git, clone_target, {:checkout_branch => ref})
   else
-    repo = Git.open(clone_target)
+    puts "Cleaning up #{clone_target}"
-    repo.fetch()
+    FileUtils::rm_rf(clone_target)
+    clone_and_update_project(target, clone_target, git, ref)
   end
-
-  puts "Checkout #{target} ref '#{ref}'"
-  repo.branch(ref).checkout
 end
 
 def build_page_index(full_docs_dir, project_docs_dir)

examples/icinga2-latest.yml

@@ -4,7 +4,7 @@ source_dir: '/Users/bsheqa/git/github/icinga/icinga-docs-tools/www/source'
 site_dir: '/Users/bsheqa/git/github/icinga/icinga-docs-tools/www/html'
 project:
   git: 'https://github.com/Icinga/icinga2.git'
-  ref: 'support/v2.7'
+  ref: 'support/2.7'
   target: 'icinga2'
   docs_dir: 'doc'
   latest: true