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Slicer modules typically consist of several files of various types, such as CMake files, source files, and binary files.

In many cases, the names of the files and the names of text strings inside the files are related and need to be in sync in order for things to compile.

Also, it is not uncommon to want to use one module as the starting point for implementing similar functionality.


  • The template is a directory containing a slicer module
  • The templateKey is a text string, typically the name of the module, that is used in both filename and identifiers inside the module.
  • The target is a directory where you want the new module to be placed
  • The moduleName is the string that you want to use in place of the templateKey


ModuleWizard [--template <dir>] [--templateKey <key>] [--target <dir>] <moduleName>
 --template default ./Extensions/Testing/LoadableExtensionTemplate
 --templateKey default is dirname of template
 --target default ./Modules/Loadable/<moduleName>


These can be run from the Slicer4 source directory.

To create a CLI Extension:

 ./Utilities/Scripts/ --template ./Extensions/Testing/CLIExtensionTemplate --target ../MyFooExtension MyFooExtension

where MyFooExtension is the name of your extension

To create a Loadable Extension:

 ./Utilities/Scripts/ --template ./Extensions/Testing/LoadableExtensionTemplate --target ../MyBarExtension MyBarExtension

where MyBarExtension is the name of your extension

To create a Scripted Loadable Extension:

 ./Utilities/Scripts/ --template ./Extensions/Testing/ScriptedLoadableExtensionTemplate --target ../MyBorExtension MyBorExtension

where MyBorExtension is the name of your extension

To create an EditorEffect Extension

 ./Utilities/Scripts/ --template ./Extensions/Testing/EditorExtensionTemplate --target ../MyEditorEffect MyEditorEffect

where MyEditorEffect is the name of your extension