Environment creation fails with non-ASCII chars in path

[eseifert]

Creating a new environment with a non-ASCII path fails. For example, when I execute the following command in the path /work/öäü on my Linux system:

$ nodeenv env

it fails with

 * Install node.js (0.10.24Traceback (most recent call last):
  File "/usr/lib/python-exec/python2.7/nodeenv", line 9, in <module>
    load_entry_point('nodeenv==0.7.2', 'console_scripts', 'nodeenv')()
  File "/usr/lib64/python2.7/site-packages/nodeenv.py", line 546, in main
    create_environment(env_dir, opt)
  File "/usr/lib64/python2.7/site-packages/nodeenv.py", line 472, in create_environment
    install_node(env_dir, src_dir, opt)
  File "/usr/lib64/python2.7/site-packages/nodeenv.py", line 353, in install_node
    node_src_dir = join(src_dir, node_name)
  File "/usr/lib64/python2.7/posixpath.py", line 80, in join
    path += '/' + b
UnicodeDecodeError: 'ascii' codec can't decode byte 0xc3 in position 6: ordinal not in range(128)

Several fixes for a silar problem in virtualenv have been proposed, e.g. pypa/virtualenv#457