#!/usr/bin/python
#?-*-?coding:?utf-8?-*-

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#?Copyright?（c）?2012?Willow?Garage?Inc.
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‘‘‘This?file?generates?shell?code?for?the?setup.SHELL?scripts?to?set?environment?variables‘‘‘

from?__future__?import?print_function
import?argparse
import?copy
import?errno
import?os
import?platform
import?sys

CATKIN_MARKER_FILE?=?‘.catkin‘

system?=?platform.system（）
IS_DARWIN?=?（system?==?‘Darwin‘）
IS_WINDOWS?=?（system?==?‘Windows‘）

PATH_TO_ADD_SUFFIX?=?[‘bin‘]
if?IS_WINDOWS:
????#?while?catkin?recommends?putting?dll‘s?into?bin?3rd?party?packages?often?put?dll‘s?into?lib
????#?since?Windows?finds?dll‘s?via?the?PATH?variable?prepend?it?with?path?to?lib
????PATH_TO_ADD_SUFFIX.extend（[[‘lib‘?os.path.join（‘lib‘?‘x86_64-linux-gnu‘）]]）

#?subfolder?of?workspace?prepended?to?CMAKE_PREFIX_PATH
ENV_VAR_SUBFOLDERS?=?{
????‘CMAKE_PREFIX_PATH‘:?‘‘
????‘LD_LIBRARY_PATH‘?if?not?IS_DARWIN?else?‘DYLD_LIBRARY_PATH‘:?[‘lib‘?os.path.join（‘lib‘?‘x86_64-linux-gnu‘）]
????‘PATH‘:?PATH_TO_ADD_SUFFIX
????‘PKG_CONFIG_PATH‘:?[os.path.join（‘lib‘?‘pkgconfig‘）?os.path.join（‘lib‘?‘x86_64-linux-gnu‘?‘pkgconfig‘）]
????‘PYTHONPATH‘:?‘lib/python2.7/dist-packages‘
}


def?rollback_env_variables（environ?env_var_subfolders）:
????‘‘‘
????Generate?shell?code?to?reset?environment?variables
????by?unrolling?modifications?based?on?all?workspaces?in?CMAKE_PREFIX_PATH.
????This?does?not?cover?modifications?performed?by?environment?hooks.
????‘‘‘
????line