Adding delete_tag

Adding support for some `tag` options
  -f
  -d
  -s
  -a
  -m

Supporting `tag` object reference

closes #109
closes #104
closes #24

refs #27

lib/git/base.rb

@@ -408,10 +408,26 @@ def tag(tag_name)
       Git::Object.new(self, tag_name, 'tag', true)
     end
 
-    # creates a new git tag (Git::Tag)
-    def add_tag(tag_name)
-      self.lib.tag(tag_name)
-      tag(tag_name)
+    # Creates a new git tag (Git::Tag)
+    # Usage:
+    #     repo.add_tag('tag_name', object_reference)
+    #     repo.add_tag('tag_name', object_reference, {:options => 'here'})
+    #     repo.add_tag('tag_name', {:options => 'here'})
+    #
+    # Options:
+    #   :a | :annotate -> true
+    #   :d             -> true
+    #   :m | :message  -> String
+    #   :s             -> true
+    #   
+    def add_tag(name, *opts)
+      self.lib.tag(name, *opts)
+      tag(name)
+    end
+
+    # deletes a tag 
+    def delete_tag(name) 
+      self.lib.tag(name, {:d => true})
     end
 
     # creates an archive file of the given tree-ish

lib/git/lib.rb

@@ -562,8 +562,26 @@ def tags
       command_lines('tag')
     end
 
-    def tag(tag)
-      command('tag', tag)
+    def tag(name, *opts)
+      target = opts[0].instance_of?(String) ? opts[0] : nil
+
+      opts = opts.last.instance_of?(Hash) ? opts.last : {}
+
+      if (opts[:a] || opts[:annotate]) && !(opts[:m] || opts[:message])
+        raise  "Can not create an [:a|:annotate] tag without the precense of [:m|:message]."
+      end
+
+      arr_opts = []
+
+      arr_opts << '-f' if opts[:force] || opts[:f]
+      arr_opts << '-a' if opts[:a] || opts[:annotate]
+      arr_opts << '-s' if opts[:s] || opts[:sign]
+      arr_opts << '-d' if opts[:d] || opts[:delete]
+      arr_opts << name
+      arr_opts << target if target
+      arr_opts << "-m #{opts[:m] || opts[:message]}" if opts[:m] || opts[:message]
+
+      command('tag', arr_opts)
     end
 
 

tests/units/test_tags.rb

@@ -24,12 +24,36 @@ def test_tags
       r1.commit('my commit')
       r1.add_tag('second')
 
-      assert(r1.tags.map{|t| t.name}.include?('first'))
+      assert(r1.tags.any?{|t| t.name == 'first'})
 
       r2.add_tag('third')
 
-      assert(r2.tags.map{|t| t.name}.include?('third'))
-      assert(!r2.tags.map{|t| t.name}.include?('second'))
+      assert(r2.tags.any?{|t| t.name == 'third'})
+      assert(r2.tags.none?{|t| t.name == 'second'})
+
+      assert_raise RuntimeError do
+        r2.add_tag('fourth', {:a => true})
+      end
+
+      r2.add_tag('fourth', {:a => true, :m => 'test message'})
+
+      assert(r2.tags.any?{|t| t.name == 'fourth'})
+
+      r2.add_tag('fifth', r2.tags.detect{|t| t.name == 'third'}.objectish)
+
+      assert(r2.tags.detect{|t| t.name == 'third'}.objectish == r2.tags.detect{|t| t.name == 'fifth'}.objectish)
+
+      assert_raise Git::GitExecuteError do
+        r2.add_tag('third')
+      end
+
+      r2.add_tag('third', {:f => true})
+
+      r2.delete_tag('third')
+
+      assert_raise Git::GitTagNameDoesNotExist do
+        r2.tag('third')
+      end
     end
   end
-end
+end