New issue 359: RuntimeError: Cannot locate a COMSPEC environment variable...
with os.popen on Windows
https://bitbucket.org/hpk42/tox/issues/359/runtimeerror-cannot-locate-a-comspec
Cosimo Lupo:
The distutils cygwinccompiler.py uses `os.popen`, which seems to require the
%COMSPEC% environment variable to be set, else it raises a runtime error (see
traceback below).
If I use `passenv = COMSPEC` in my tox.ini, then it works fine.
The value of the variable on my system is the default
`C:\Windows\system32\cmd.exe`.
Thanks,
Cosimo
```
py27 runtests: commands[2] | python setup.py test
running pytest
running egg_info
writing top-level names to src/python\compreffor.egg-info\top_level.txt
writing dependency_links to src/python\compreffor.egg-info\dependency_links.txt
writing src/python\compreffor.egg-info\PKG-INFO
reading manifest file 'src/python\compreffor.egg-info\SOURCES.txt'
reading manifest template 'MANIFEST.in'
writing manifest file 'src/python\compreffor.egg-info\SOURCES.txt'
running build_ext
Traceback (most recent call last):
File "setup.py", line 168, in <module>
setup(**setup_params)
File "C:\Python27-mingwpy\Lib\distutils\core.py", line 151, in setup
dist.run_commands()
File "C:\Python27-mingwpy\Lib\distutils\dist.py", line 953, in run_commands
self.run_command(cmd)
File "C:\Python27-mingwpy\Lib\distutils\dist.py", line 972, in run_command
cmd_obj.run()
File "build\bdist.win32\egg\ptr.py", line 85, in run
File
"C:\UsersLocal\cosimo.lupo\Documents\GitHub\compreffor\.tox\py27\lib\site-packages\setuptools\command\test.py",
line 111, in with_project_on_sys_path
with self.project_on_sys_path():
File "C:\Python27-mingwpy\Lib\contextlib.py", line 17, in __enter__
return self.gen.next()
File
"C:\UsersLocal\cosimo.lupo\Documents\GitHub\compreffor\.tox\py27\lib\site-packages\setuptools\command\test.py",
line 139, in project_on_sys_path
self.run_command('build_ext')
File "C:\Python27-mingwpy\Lib\distutils\cmd.py", line 326, in run_command
self.distribution.run_command(command)
File "C:\Python27-mingwpy\Lib\distutils\dist.py", line 972, in run_command
cmd_obj.run()
File
"C:\UsersLocal\cosimo.lupo\Documents\GitHub\compreffor\.tox\py27\lib\site-packages\setuptools\command\build_ext.py",
line 68, in run
_build_ext.run(self)
File "C:\Python27-mingwpy\Lib\distutils\command\build_ext.py", line 306, in
run
force=self.force)
File "C:\Python27-mingwpy\Lib\distutils\ccompiler.py", line 1004, in
new_compiler
return klass(None, dry_run, force)
File "C:\Python27-mingwpy\Lib\distutils\cygwinccompiler.py", line 306, in
__init__
CygwinCCompiler.__init__ (self, verbose, dry_run, force)
File "C:\Python27-mingwpy\Lib\distutils\cygwinccompiler.py", line 107, in
__init__
get_versions()
File "C:\Python27-mingwpy\Lib\distutils\cygwinccompiler.py", line 420, in
get_versions
out = os.popen(gcc_exe + ' -dumpversion','r')
RuntimeError: Cannot locate a COMSPEC environment variable to use as the shell
ERROR: InvocationError:
'C:\\UsersLocal\\cosimo.lupo\\Documents\\GitHub\\compreffor\\.tox\\py27\\Scripts\\python.EXE
setup.py test'
```
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