Documentation/Nightly/Developers/Tutorials/MigrationGuide/SlicerExtension

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Slicer Extension updates

Slicer 4.9: Explicit initialization of CMAKE_BUILD_TYPE not needed anymore

Following r26978, calling find_package(Slicer REQUIRED) and include(${Slicer_USE_FILE}) initializes CMAKE_BUILD_TYPE and ensures the variables CMAKE_BUILD_TYPE and CMAKE_CONFIGURATION_TYPES are passed to all external projects when configuring SuperBuild based extension.

The module SlicerInitializeBuildType is automatically included in UserSlicer.

Slicer 4.9: Subversion not required anymore

Following r27060, Subversion is not required anymore.

Slicer 4.9: Support EP_GIT_PROTOCOL and use of ExternalProject_SetIfNotDefined for setting GIT_REPOSITORY, GIT_TAG and alike

Following r26957, extension may use the following convention to define GIT_REPOSITORY and <GIT_TAG/tt>, this allows developer to override the value before the first configuration by setting the corresponding environment variable, or by explicitly configuring the project with that variable.