[CMake] Copy files to build folder

[Tim Hutton]

We've got this section in our CMakeLists.txt:

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

file( GLOB_RECURSE pattern_files RELATIVE
"${CMAKE_CURRENT_SOURCE_DIR}/" "patterns/*.vti" )
foreach( pattern_file ${pattern_files} )
  add_custom_command(
    OUTPUT "${CMAKE_CURRENT_BINARY_DIR}/${pattern_file}"
    COMMAND cmake -E copy
"${CMAKE_CURRENT_SOURCE_DIR}/${pattern_file}"
"${CMAKE_CURRENT_BINARY_DIR}/${pattern_file}"
    DEPENDS "${CMAKE_CURRENT_SOURCE_DIR}/${pattern_file}"
  )
  list( APPEND pattern_files_dest "${pattern_file}" )
endforeach( pattern_file )

add_custom_target( CopyPatterns ALL DEPENDS ${pattern_files_dest} )

#-----------------------------------------------------------------------------------------------

The idea is to copy all the *.vti files in the "patterns" folder (and
subfolders) into the build folder, so our program can load them. This
works fine when running CMake for the first time. However, if we add a
new pattern file it doesn't get picked up, even after make clean. (It
works if we edit the CMakeLists.txt, or delete everything in the build
folder.) Is there a way to make this work every time?

Thanks,

Tim

-- 
Tim Hutton - http://www.sq3.org.uk - http://profiles.google.com/tim.hutton/