Index: app/controllers/projects_controller.rb
===================================================================
--- app/controllers/projects_controller.rb	(revision 3764)
+++ app/controllers/projects_controller.rb	(working copy)
@@ -15,6 +15,8 @@
 # along with this program; if not, write to the Free Software
 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 
+require 'vpim/icalendar'
+
 class ProjectsController < ApplicationController
   menu_item :overview
   menu_item :activity, :only => :activity
@@ -27,7 +29,7 @@
   before_filter :authorize, :except => [ :index, :list, :add, :copy, :archive, :unarchive, :destroy, :activity ]
   before_filter :authorize_global, :only => :add
   before_filter :require_admin, :only => [ :copy, :archive, :unarchive, :destroy ]
-  accept_key_auth :activity
+  accept_key_auth :activity, :roadmap
   
   after_filter :only => [:add, :edit, :archive, :unarchive, :destroy] do |controller|
     if controller.request.post?
@@ -318,7 +320,6 @@
     
     @versions = @project.shared_versions.sort
     @versions.reject! {|version| version.closed? || version.completed? } unless params[:completed]
-    
     @issues_by_version = {}
     unless @selected_tracker_ids.empty?
       @versions.each do |version|
@@ -328,8 +329,53 @@
                                                    :order => "#{Project.table_name}.lft, #{Tracker.table_name}.position, #{Issue.table_name}.id")
         @issues_by_version[version] = issues
       end
+    end    
+    @versions.reject! {|version| !project_ids.include?(version.project_id) && @issues_by_version[version].empty?}        
+    respond_to do |format|        
+      format.html
+      format.ics do      
+        calendar = Vpim::Icalendar.create2('Redmine')      
+        @versions.each do |version|      
+          calendar.add_event do |event|
+            if version.effective_date
+              event.dtstart       version.effective_date
+              event.dtend         version.effective_date
+              event.summary       "#{version.project.name} #{version.name}"
+              event.description   version.description
+              event.url           url_for(:controller => 'versions', :action => 'show', :id => version)
+            end
+          end
+                            
+          @issues_by_version[version].each do |issue|                      
+            options = []
+            options.push Vpim::DirectoryInfo::Field.create('SUMMARY', issue.subject)
+            options.push Vpim::DirectoryInfo::Field.create('DTSTART;VALUE=DATE', issue.start_date) if issue.start_date
+            options.push Vpim::DirectoryInfo::Field.create('DUE;VALUE=DATE', issue.due_date) if issue.due_date
+            options.push Vpim::DirectoryInfo::Field.create('DESCRIPTION', issue.description) if issue.description
+            options.push Vpim::DirectoryInfo::Field.create('URL', url_for(:controller => 'issues', :action => 'show', :id => issue))
+           
+            # See http://tools.ietf.org/html/rfc2445#section-4.8.1.9
+            if issue.priority              
+              priority = case issue.priority.position
+                when Range.new(0, IssuePriority.active.default.position, true) then '9'
+                when IssuePriority.active.default.position then '5'
+                else '1'
+              end                   
+              options.push Vpim::DirectoryInfo::Field.create('PRIORITY', priority)        
+            end
+            
+            # See http://tools.ietf.org/html/rfc2445#section-4.8.1.11
+            if issue.closed? 
+              options.push Vpim::DirectoryInfo::Field.create('STATUS', 'COMPLETED')  
+              options.push Vpim::DirectoryInfo::Field.create('COMPLETED', issue.updated_on)           
+            end                        
+            calendar.push Vpim::Icalendar::Vtodo.create(options)                                                          
+          end
+        end
+        render :text => calendar.encode  
+      end    
     end
-    @versions.reject! {|version| !project_ids.include?(version.project_id) && @issues_by_version[version].empty?}
+
   end
   
   def activity
Index: app/views/projects/roadmap.rhtml
===================================================================
--- app/views/projects/roadmap.rhtml	(revision 3764)
+++ app/views/projects/roadmap.rhtml	(working copy)
@@ -41,8 +41,13 @@
 
 <h3><%= l(:label_version_plural) %></h3>
 <% @versions.each do |version| %>
-<%= link_to format_version_name(version), "##{version.name}" %><br />
+  <%= link_to format_version_name(version), "##{version.name}" %><br />
 <% end %>
+
+<h3>Export</h3>
+<%= link_to 'iCalendar', :controller => 'projects', :action => 'roadmap', :format => 'ics', :key => User.current.rss_key, :only_path => false, :protocol => 'webcal' %><br />
+<%= link_to 'iCalendar (ICS Export)', :controller => 'projects', :action => 'roadmap', :format => 'ics', :key => User.current.rss_key %>
+
 <% end %>
 
 <% html_title(l(:label_roadmap)) %>
Index: config/routes.rb
===================================================================
--- config/routes.rb	(revision 3764)
+++ config/routes.rb	(working copy)
@@ -178,7 +178,8 @@
       project_views.connect 'projects.:format', :action => 'index'
       project_views.connect 'projects/new', :action => 'add'
       project_views.connect 'projects/:id', :action => 'show'
-      project_views.connect 'projects/:id/:action', :action => /roadmap|destroy|settings/
+      project_views.connect 'projects/:id/:action', :action => /destroy|settings/
+      project_views.connect 'projects/:id/roadmap.:format', :action => 'roadmap'
       project_views.connect 'projects/:id/files', :action => 'list_files'
       project_views.connect 'projects/:id/files/new', :action => 'add_file'
       project_views.connect 'projects/:id/versions/new', :action => 'add_version'