Clone support for git < 1.6.5

extras/big_tuna/vcs/git.rb

@@ -13,6 +13,22 @@ def self.supported?
       @_supported
     end
 
+    def self.version_at_least?(version)
+      if @_version.nil?
+        output = BigTuna::Runner.execute(Dir.pwd, "git --version").stdout.first
+        @_version = output.match(/\d+\.\d+\.\d+/)[0].split(".").map { |e| e.to_i }
+      end
+      parts = version.split(".").map { |e| e.to_i }
+      parts.each_with_index do |part, index|
+        if part > @_version[index]
+          return false
+        elsif part < @_version[index]
+          return true
+        end
+      end
+      return true
+    end
+
     def head_info
       info = {}
       command = "git log --max-count=1 --format=\"%H%n%an%n%ae%n%ad%n%s\" #{self.branch}"
@@ -31,7 +47,11 @@ def head_info
     end
 
     def clone(where_to)
-      command = "git clone --branch #{self.branch} --depth 1 #{self.source} #{where_to}"
+      if self.class.version_at_least?("1.6.5")
+        command = "git clone --branch #{self.branch} --depth 1 #{self.source} #{where_to}"
+      else
+        command = "mkdir -p #{where_to} && cd #{where_to} && git init && git pull #{self.source} #{self.branch} && git branch -M master #{self.branch}"
+      end
       BigTuna::Runner.execute(Dir.pwd, command)
     end
   end