CodeSmith 4.0 Beta 2 was recently released.

Below is a sample list of changes which have been made from the previous version 3.2.X.

• CodeSmith Project support (.csp files).  This replaces property sets, the custom tool and the batch format.

  • CodeSmith Projects can be run from the command line, inside MSBuild, inside CodeSmith Studio, and inside Windows Explorer.
  • Inside of Visual Studio, any outputs that are generated will automatically be added to your project.
  • If you build your project and you have the "Generate On Build" option on, your outputs will automatically be re-generated even if you generate from the command line using MSBuild.
  • Progress dialog is shown when running from Windows Explorer.
  • GUI dialogs to easily manage your project file.
  • Easily add new outputs where you select a template and specify the property values.
  • You can also specify merge settings through the GUI to enable code merging support.
• ActiveSnippet support.  This will allow you to type something like:  "tp Petshop.dbo.Orders" inside of Visual Studio and then hit the expand key (CTRL-E, CTRL-E by default) and it will expand out into a list of property getters/setters and member variables based on the fields and data types of the Orders table.
• CodeSmith Map support (.csmap files).  This feature will allow you to create dictionary style maps of things like SQL to C# data type mappings.
  • Example: <%@ Map Name="CSharpTypeAlias" src="System-CSharpAlias.csmap" Description="Maps system types to C# aliases." %> <%= CSharpTypeAlias["System.String"] %> = "string"
  • Ability to reverse the map and use the values as the map keys.  This is useful for doing reverse lookups.
  • Ability to return the key value if a corresponding map entry is not found.
  • Ability to return a default value if a corresponding map entry is not found.
  • Ability to manage maps inside CodeSmith Studio or from Windows Explorer.
• Ability to manage database schema extended property values from inside of CodeSmith Studio.
• XmlProperty support has been enhanced to handle more variations of XSD.
• Template property values are saved for templates so that each time you run them, you donb_t have to reset the values manually.
• .netTiers 2.0 templates are included in the install.
• Added csxsd.exe to allow manually creating shared XmlProperty assemblies.
• Ton of new system extended properties added to SchemaExplorer objects.
• Bunch of performance improvements here and there throughout CodeSmith.
• Bunch of bug fixes.

For further detail for Beta 1 and 2 changes please check out this entry on the CodeSmith Community Blog.

In addition, I also found these screenshots and specific feature explanations to be really insightful.