if(NOT UNIX)
  execute_process(
    WORKING_DIRECTORY @PROJECT_BINARY_DIR@/python
    COMMAND @Python3_EXECUTABLE@ -m pip install
    --find-links=dist @PYTHON_PROJECT@==@PROJECT_VERSION@@PYTHON_RELEASE@
  )
  return()
endif()

if(DEFINED ENV{DESTDIR})
  # If DESTDIR is not absolute path, make it relative to @PROJECT_BINARY_DIR@
  # like any install() command.
  if(IS_ABSOLUTE $ENV{DESTDIR})
    set(ROOT "--root='$ENV{DESTDIR}'")
  else()
    set(ROOT "--root='@PROJECT_BINARY_DIR@/$ENV{DESTDIR}'")
  endif()
else()
  set(ROOT "")
endif()

# Check if we have system Python on Debian/Ubuntu, if so tell setuptools
# to use the deb layout (dist-packages instead of site-packages).
execute_process(
  COMMAND "@Python3_EXECUTABLE@" -c "import sys; sys.stdout.write(sys.path[-1])"
  OUTPUT_VARIABLE Python_STDLIB_DIR
)
if(Python_STDLIB_DIR MATCHES ".*/dist-packages$")
  set(SETUPTOOLS_INSTALL_LAYOUT "--install-layout=deb")
else()
  set(SETUPTOOLS_INSTALL_LAYOUT "")
endif()

execute_process(
  WORKING_DIRECTORY @PROJECT_BINARY_DIR@/python
  COMMAND "@Python3_EXECUTABLE@" setup.py install
    ${ROOT}
    --prefix="@CMAKE_INSTALL_PREFIX@"
    ${SETUPTOOLS_INSTALL_LAYOUT}
)