7 files changed, 45 insertions, 7 deletions
diff --git a/lib/puppet/provider/vcsrepo/bzr.rb b/lib/puppet/provider/vcsrepo/bzr.rb
index a6e12cd..a060562 100644
--- a/lib/puppet/provider/vcsrepo/bzr.rb
+++ b/lib/puppet/provider/vcsrepo/bzr.rb
@@ -5,6 +5,7 @@ Puppet::Type.type(:vcsrepo).provide(:bzr, :parent => Puppet::Provider::Vcsrepo)
 
   commands   :bzr => 'bzr'
   defaultfor :bzr => :exists
+  has_features :reference_tracking
 
   def create
     if !@resource.value(:source)
diff --git a/lib/puppet/provider/vcsrepo/cvs.rb b/lib/puppet/provider/vcsrepo/cvs.rb
index 1cedc8b..e82c23a 100644
--- a/lib/puppet/provider/vcsrepo/cvs.rb
+++ b/lib/puppet/provider/vcsrepo/cvs.rb
@@ -5,7 +5,7 @@ Puppet::Type.type(:vcsrepo).provide(:cvs, :parent => Puppet::Provider::Vcsrepo)
 
   commands   :cvs => 'cvs'
   defaultfor :cvs => :exists
-  has_features :gzip_compression
+  has_features :gzip_compression, :reference_tracking
   
   def create
     if !@resource.value(:source)
diff --git a/lib/puppet/provider/vcsrepo/git.rb b/lib/puppet/provider/vcsrepo/git.rb
index 274f25b..ba5065e 100644
--- a/lib/puppet/provider/vcsrepo/git.rb
+++ b/lib/puppet/provider/vcsrepo/git.rb
@@ -5,7 +5,7 @@ Puppet::Type.type(:vcsrepo).provide(:git, :parent => Puppet::Provider::Vcsrepo)
 
   commands :git => 'git'
   defaultfor :git => :exists
-  has_features :bare_repositories
+  has_features :bare_repositories, :reference_tracking
 
   def create
     if !@resource.value(:source)
@@ -37,7 +37,7 @@ Puppet::Type.type(:vcsrepo).provide(:git, :parent => Puppet::Provider::Vcsrepo)
   end
 
   def revision=(desired)
-    fetch
+    pull
     reset(desired)
   end
 
@@ -48,6 +48,16 @@ Puppet::Type.type(:vcsrepo).provide(:git, :parent => Puppet::Provider::Vcsrepo)
   def working_copy_exists?
     File.directory?(File.join(@resource.value(:path), '.git'))
   end
+
+  def exists?
+    working_copy_exists? || bare_exists?
+  end
+
+  def update_references
+    at_path do
+      git('fetch', '--tags', 'origin')
+    end
+  end
   
   private
 
@@ -68,9 +78,9 @@ Puppet::Type.type(:vcsrepo).provide(:git, :parent => Puppet::Provider::Vcsrepo)
     git(*args)
   end
 
-  def fetch
+  def pull
     at_path do
-      git('fetch', 'origin')
+      git('pull', 'origin')
     end
   end
 
diff --git a/lib/puppet/provider/vcsrepo/hg.rb b/lib/puppet/provider/vcsrepo/hg.rb
index 928049f..df8b4f0 100644
--- a/lib/puppet/provider/vcsrepo/hg.rb
+++ b/lib/puppet/provider/vcsrepo/hg.rb
@@ -5,6 +5,7 @@ Puppet::Type.type(:vcsrepo).provide(:hg, :parent => Puppet::Provider::Vcsrepo) d
 
   commands   :hg => 'hg'
   defaultfor :hg => :exists
+  has_features :reference_tracking
 
   def create
     if !@resource.value(:source)
diff --git a/lib/puppet/provider/vcsrepo/svn.rb b/lib/puppet/provider/vcsrepo/svn.rb
index 7cdd157..5fa586d 100644
--- a/lib/puppet/provider/vcsrepo/svn.rb
+++ b/lib/puppet/provider/vcsrepo/svn.rb
@@ -7,7 +7,7 @@ Puppet::Type.type(:vcsrepo).provide(:svn, :parent => Puppet::Provider::Vcsrepo)
            :svnadmin => 'svnadmin'
 
   defaultfor :svn => :exists
-  has_features :filesystem_types
+  has_features :filesystem_types, :reference_tracking
 
   def create
     if !@resource.value(:source)
diff --git a/lib/puppet/type/vcsrepo.rb b/lib/puppet/type/vcsrepo.rb
index 69c7f74..137f8cd 100644
--- a/lib/puppet/type/vcsrepo.rb
+++ b/lib/puppet/type/vcsrepo.rb
@@ -14,6 +14,10 @@ Puppet::Type.newtype(:vcsrepo) do
   feature :filesystem_types,
           "The provider supports different filesystem types"
 
+  feature :reference_tracking,
+          "The provider supports tracking revision references that can change
+           over time (eg, some VCS tags and branch names)"
+  
   ensurable do
 
     newvalue :present do
@@ -28,6 +32,19 @@ Puppet::Type.newtype(:vcsrepo) do
       provider.destroy
     end
 
+    newvalue :latest, :required_features => [:reference_tracking] do
+      if provider.exists?
+        if provider.respond_to?(:update_references)
+          provider.update_references
+        end
+        reference = resource.value(:revision) || provider.revision
+        notice "Updating to latest '#{reference}' revision"
+        provider.revision = reference
+      else
+        provider.create
+      end
+    end
+
     def retrieve
       prov = @resource.provider
       if prov
diff --git a/spec/unit/puppet/provider/vcsrepo/git_spec.rb b/spec/unit/puppet/provider/vcsrepo/git_spec.rb
index 5cf6c86..0e16e60 100644
--- a/spec/unit/puppet/provider/vcsrepo/git_spec.rb
+++ b/spec/unit/puppet/provider/vcsrepo/git_spec.rb
@@ -185,11 +185,20 @@ describe provider_class do
   describe "when setting the revision property" do
     it "should use 'git fetch' and 'git reset'" do
       @resource.expects(:value).with(:path).returns(@path).at_least_once
-      @provider.expects('git').with('fetch', 'origin')
+      @provider.expects('git').with('pull', 'origin')
       Dir.expects(:chdir).with(@path).at_least_once.yields
       @provider.expects('git').with('reset', '--hard', 'carcar')
       @provider.revision = 'carcar'
     end
   end
 
+  describe "when updating references" do
+    it "should use 'git fetch --tags'" do
+      @resource.expects(:value).with(:path).returns(@path).at_least_once
+      @provider.expects('git').with('fetch', '--tags', 'origin')
+      Dir.expects(:chdir).with(@path).at_least_once.yields
+      @provider.update_references
+    end    
+  end
+
 end