[CMake] Copy files to build folder

[Tim Hutton]

For the recommended approach of including an explicit list of pattern
files, is this the right way to do it?

...

set(PATTERN_FILES    # (found in the "patterns" folder)
  example1.vti
  example2.vti
  subfolder1/example3.vti
)

...

#--------------------------copy pattern files to build
folder---------------------------------

foreach( pattern_file ${PATTERN_FILES} )
  add_custom_command(
    OUTPUT "${CMAKE_CURRENT_BINARY_DIR}/patterns/${pattern_file}"
    COMMAND cmake -E copy
"${CMAKE_CURRENT_SOURCE_DIR}/patterns/${pattern_file}"
"${CMAKE_CURRENT_BINARY_DIR}/patterns/${pattern_file}"
    DEPENDS "${CMAKE_CURRENT_SOURCE_DIR}/patterns/${pattern_file}"
  )
  list( APPEND pattern_files_dest
"${CMAKE_CURRENT_BINARY_DIR}/patterns/${pattern_file}" )
endforeach( pattern_file )
add_custom_target( CopyPatterns ALL DEPENDS ${pattern_files_dest} )

#----------------------------------------install------------------------------------------------

...

foreach( pattern_file ${PATTERN_FILES} )
  get_filename_component( path_name "patterns/${pattern_file}" PATH )
  install( FILES "patterns/${pattern_file}" DESTINATION ${path_name} )
endforeach()

...