tox cannot be started on itself with twice the same environment ( tox -e py27,py27)

[pytoxbot]

• Bitbucket: https://bitbucket.org/hpk42/tox/issue/111
• Originally reported by: @AvdN
• Originally created at: 2013-08-08T08:10:06.693

I am not sure it should run the same environment twice, but it should not throw an error:

$ tox -e py27,py27
GLOB sdist-make: /data1/src/tox.test/setup.py
py27 recreate: /data1/src/tox.test/.tox/py27
py27 installdeps: pytest>=2.3.5
py27 inst: /data1/src/tox.test/.tox/dist/tox-1.6.0.dev2.zip
py27 runtests: commands[0] | py.test --junitxml=/data1/src/tox.test/.tox/py27/log/junit-py27.xml
============================= test session starts =============================
platform linux2 -- Python 2.7.3 -- pytest-2.3.5
tox comes from: '/data1/src/tox.test/.tox/py27/local/lib/python2.7/site-packages/tox/__init__.pyc'
collected 159 items 

<snip>
tests/test_z_cmdline.py .................................

---- generated xml file: /data1/src/tox.test/.tox/py27/log/junit-py27.xml -----
=================== 157 passed, 2 skipped in 79.87 seconds ====================
py27 inst: /data1/src/tox.test/.tox/dist/tox-1.6.0.dev2.zip
Traceback (most recent call last):
  File "/usr/local/bin/tox", line 9, in <module>
    load_entry_point('tox==1.6.0.dev2', 'console_scripts', 'tox')()
  File "/data1/src/tox.test/tox/_cmdline.py", line 26, in main
    retcode = Session(config).runcommand()
  File "/data1/src/tox.test/tox/_cmdline.py", line 301, in runcommand
    return self.subcommand_test()
  File "/data1/src/tox.test/tox/_cmdline.py", line 420, in subcommand_test
    self.runtestenv(venv)
  File "/data1/src/tox.test/tox/_cmdline.py", line 428, in runtestenv
    venv.test(redirect=redirect)
  File "/data1/src/tox.test/tox/_venv.py", line 328, in test
    message = "commands[%s] | %s" % (i, ' '.join(argv))
TypeError: sequence item 0: expected string, LocalPath found

This was tested on a fresh clone of tox:

changeset:   484:d31aad39e16f
tag:         tip
user:        Matt Good <matt@matt-good.net>
date:        Wed Aug 07 09:13:48 2013 -0700
summary:     Compute skipsdist default at config parse time

[pytoxbot]

Original comment by @hpk42

fix issue109 and fix issue111: multiple "-e" options are now combined
(previously the last one would win). Thanks Anthon van der Neut.

→ <<cset 3be5bca16f8b>>

[pytoxbot]

Original comment by @hpk42

dash_e: fixes #109 and #111

Behaviour of -e has not changed, but can be set by passing True or False
as a parameter multi_dash_e to tox/_config.py: prepare_parse()

This parameter should come from a user specifyable default value
for backwards compatibility. Default should preferable be True after
that is implemented.

_split_env() was factored out of class parseini to enable testing

The issue #111: error on specifying same env twice ("tox -e py27,py27")
fixed. Multiple specifications of the same environment result in
multiple invocation (this could also be selectable in a
configuration file)

→ <>

[pytoxbot]

Original comment by @hpk42

dash_e: fixes #109 and #111

Behaviour of -e has not changed, but can be set by passing True or False
as a parameter multi_dash_e to tox/_config.py: prepare_parse()

This parameter should come from a user specifyable default value
for backwards compatibility. Default should preferable be True after
that is implemented.

_split_env() was factored out of class parseini to enable testing

The issue #111: error on specifying same env twice ("tox -e py27,py27")
fixed. Multiple specifications of the same environment result in
multiple invocation (this could also be selectable in a
configuration file)

→ <<cset 96e1ba41e1c0>>

[pytoxbot]

Original comment by @hpk42

dash_e: fixes #109 and #111

Behaviour of -e has not changed, but can be set by passing True or False
as a parameter multi_dash_e to tox/_config.py: prepare_parse()

This parameter should come from a user specifyable default value
for backwards compatibility. Default should preferable be True after
that is implemented.

_split_env() was factored out of class parseini to enable testing

The issue #111: error on specifying same env twice ("tox -e py27,py27")
fixed. Multiple specifications of the same environment result in
multiple invocation (this could also be selectable in a
configuration file)

→ <>

[pytoxbot]

Original comment by @AvdN

This is caused by tox/_venv.py: _pcall updating the list 'args' in place.