set(proj python-extension-manager-requirements)

# Set dependency list
set(${proj}_DEPENDENCIES
  python
  python-pip
  python-setuptools
  )

if(NOT DEFINED Slicer_USE_SYSTEM_${proj})
  set(Slicer_USE_SYSTEM_${proj} ${Slicer_USE_SYSTEM_python})
endif()

# Include dependent projects if any
ExternalProject_Include_Dependencies(${proj} PROJECT_VAR proj DEPENDS_VAR ${proj}_DEPENDENCIES)

if(Slicer_USE_SYSTEM_${proj})
  foreach(module_name IN ITEMS
    chardet
    couchdb
    git
    gitdb
    six
    smmap
    )
    ExternalProject_FindPythonPackage(
      MODULE_NAME "${module_name}"
      REQUIRED
      )
  endforeach()
endif()

if(NOT Slicer_USE_SYSTEM_${proj})
  set(requirements_file ${CMAKE_BINARY_DIR}/${proj}-requirements.txt)
  file(WRITE ${requirements_file} [===[
  chardet==3.0.4 --hash=sha256:fc323ffcaeaed0e0a02bf4d117757b98aed530d9ed4531e3e15460124c106691
  couchdb==1.2 --hash=sha256:13a28a1159c49f8346732e8724b9a4d65cba54bec017c4a7eeb1499fe88151d1
  gitdb2==2.0.6 --hash=sha256:96bbb507d765a7f51eb802554a9cfe194a174582f772e0d89f4e87288c288b7b
  smmap2==2.0.5 --hash=sha256:0555a7bf4df71d1ef4218e4807bbf9b201f910174e6e08af2e138d4e517b4dde
  GitPython==3.0.4 --hash=sha256:a7d6bef0775f66ba47f25911d285bcd692ce9053837ff48a120c2b8cf3a71389
  six==1.12.0 --hash=sha256:3350809f0555b11f552448330d0b52d5f24c91a322ea4a15ef22629740f3761c
  ]===])

  ExternalProject_Add(${proj}
    ${${proj}_EP_ARGS}
    DOWNLOAD_COMMAND ""
    SOURCE_DIR ${CMAKE_BINARY_DIR}/${proj}
    BUILD_IN_SOURCE 1
    CONFIGURE_COMMAND ""
    BUILD_COMMAND ""
    INSTALL_COMMAND ${PYTHON_EXECUTABLE} -m pip install --require-hashes -r ${requirements_file}
    LOG_INSTALL 1
    DEPENDS
      ${${proj}_DEPENDENCIES}
    )

  ExternalProject_GenerateProjectDescription_Step(${proj}
    VERSION ${_version}
    )

else()
  ExternalProject_Add_Empty(${proj} DEPENDS ${${proj}_DEPENDENCIES})
endif()