Index: app/models/mailer.rb
===================================================================
--- app/models/mailer.rb	(revision 4362)
+++ app/models/mailer.rb	(working copy)
@@ -271,6 +271,20 @@
     render_multipart('test', body)
   end
 
+  # Builds a tmail object used to email users belonging to the changeset's project.
+  #
+  # Example:
+  #   changeset(change) => tmail object
+  #   Mailer.deliver_changeset(change) => sends an email to the changeset's project recipients
+  def changeset(change)
+    redmine_headers 'Project' => change.project.identifier
+    recipients change.recipients
+    subject "[#{change.project.name}] #{change.title}"
+    body :change => change,
+         :change_url => url_for(:controller => 'repositories', :action => 'revision', :id => change.repository.project, :rev => change.revision)
+    render_multipart('changeset', body)
+  end
+
   # Overrides default deliver! method to prevent from sending an email
   # with no recipient, cc or bcc
   def deliver!(mail = @mail)
Index: app/models/changeset.rb
===================================================================
--- app/models/changeset.rb	(revision 4362)
+++ app/models/changeset.rb	(working copy)
@@ -152,6 +152,42 @@
     to_utf8(str.to_s.strip)
   end
 
+  # needed by Mailer
+  def visible?(user=nil)
+    (user || User.current).allowed_to?(:view_changesets, self.project)
+  end
+
+  def title
+    "#{l(:label_revision)} #{self.revision}" + (self.short_comments.blank? ? '' : (': ' + self.short_comments))
+  end
+  
+  def datetime
+    self[:committed_on]
+  end
+  
+  def path
+    self[:from_path]
+  end
+  
+  def diff
+    @path = self.path
+    @rev = self[:from_revision]
+    @rev_to = self.revision
+    @diff = repository.diff(@path, @rev_to, @rev)
+    if @diff
+      return "#{@diff.join}"
+    end
+    
+  end
+  
+  def recipients
+    notified = project.notified_users
+    notified << author if author && author.active? && author.notify_about?(self)
+    notified.uniq!
+    notified.reject! {|user| !visible?(user)}
+    notified.collect(&:mail)
+  end
+
   # Creates a new Change from it's common parameters
   def create_change(change)
     Change.create(:changeset => self,
@@ -159,6 +195,7 @@
                   :path => change[:path],
                   :from_path => change[:from_path],
                   :from_revision => change[:from_revision])
+    Mailer.deliver_changeset(self)
   end
   
   private