Merged Rails 2.2 branch. Redmine now requires Rails 2.2.2.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@2493 e93f8b46-1217-0410-a6f0-8f06a7374b81

vendor/plugins/engines/tasks/engines.rake

@@ -43,6 +43,80 @@ namespace :db do
       end
     end
 
+    desc 'For engines coming from Rails version < 2.0 or for those previously updated to work with Sven Fuch\'s fork of engines, you need to upgrade the schema info table'
+    task :upgrade_plugin_migrations => :environment do
+      svens_fork_table_name = 'plugin_schema_migrations'
+      
+      # Check if app was previously using Sven's fork
+      if ActiveRecord::Base.connection.table_exists?(svens_fork_table_name)
+        old_sm_table = svens_fork_table_name
+      else
+        old_sm_table = ActiveRecord::Migrator.proper_table_name(Engines.schema_info_table)
+      end
+      
+      unless ActiveRecord::Base.connection.table_exists?(old_sm_table)
+        abort "Cannot find old migration table - assuming nothing needs to be done"
+      end
+      
+      # There are two forms of the engines schema info - pre-fix_plugin_migrations and post
+      # We need to figure this out before we continue.
+      
+      results = ActiveRecord::Base.connection.select_rows(
+        "SELECT version, plugin_name FROM #{old_sm_table}"
+      ).uniq
+      
+      def insert_new_version(plugin_name, version)
+        version_string = "#{version}-#{plugin_name}"
+        new_sm_table = ActiveRecord::Migrator.schema_migrations_table_name
+        
+        # Check if the row already exists for some reason - maybe run this task more than once.
+        return if ActiveRecord::Base.connection.select_rows("SELECT * FROM #{new_sm_table} WHERE version = #{version_string.dump.gsub("\"", "'")}").size > 0
+        
+        puts "Inserting new version #{version} for plugin #{plugin_name}.."
+        ActiveRecord::Base.connection.insert("INSERT INTO #{new_sm_table} (version) VALUES (#{version_string.dump.gsub("\"", "'")})")
+      end
+      
+      # We need to figure out if they already used "fix_plugin_migrations"
+      versions = {}
+      results.each do |r|
+        versions[r[1]] ||= []
+        versions[r[1]] << r[0].to_i
+      end
+      
+      if versions.values.find{ |v| v.size > 1 } == nil
+        puts "Fixing migration info"
+        # We only have one listed migration per plugin - this is pre-fix_plugin_migrations,
+        # so we build all versions required. In this case, all migrations should 
+        versions.each do |plugin_name, version|
+          version = version[0] # There is only one version
+          
+          # We have to make an assumption that numeric migrations won't get this long..
+          # I'm not sure if there is a better assumption, it should work in all
+          # current cases.. (touch wood..)
+          if version.to_s.size < "YYYYMMDDHHMMSS".size
+            # Insert version records for each migration
+            (1..version).each do |v|
+             insert_new_version(plugin_name, v)
+            end
+          else
+            # If the plugin is new-format "YYYYMMDDHHMMSS", we just copy it across... 
+            # The case in which this occurs is very rare..
+            insert_new_version(plugin_name, version)
+          end
+        end
+      else
+        puts "Moving migration info"
+        # We have multiple migrations listed per plugin - thus we can assume they have
+        # already applied fix_plugin_migrations - we just copy it across verbatim
+        versions.each do |plugin_name, version|
+          version.each { |v| insert_new_version(plugin_name, v) }
+        end
+      end
+      
+      puts "Migration info successfully migrated - removing old schema info table"
+      ActiveRecord::Base.connection.drop_table(old_sm_table)
+    end
+    
     desc 'Migrate a specified plugin.'
     task({:plugin => :environment}, :name, :version) do |task, args|
       name = args[:name] || ENV['NAME']
@@ -53,7 +127,7 @@ namespace :db do
       else
         puts "Plugin #{name} does not exist."
       end
-    end    
+    end
   end
 end
 
@@ -174,5 +248,5 @@ Report any issues on http://dev.rails-engines.org. Thanks!
     
     # Patch the default plugin testing task to have setup_plugin_fixtures as a prerequisite
     Rake::Task["test:plugins"].prerequisites << "test:plugins:setup_plugin_fixtures"
-  end  
-end
+  end
+end