tox 3.14.5 incompatible with virtualenv 20

[astrofrog]

I am running into issues when using the very latest versions of tox and virtualenv. I am running things in a clean environment:

$ pip freeze
appdirs==1.4.3
distlib==0.3.0
filelock==3.0.12
importlib-metadata==1.5.0
packaging==20.3
pkg-resources==0.0.0
pluggy==0.13.1
py==1.8.1
pyparsing==2.4.6
six==1.14.0
toml==0.10.0
tox==3.14.5
virtualenv==20.0.11
zipp==3.1.0

If I create a simple tox.ini file that specifies a requirement that is not in the current environment:

[tox]
envlist = test
requires =
    setuptools >= 30.3.0
    pip >= 19.3.1
    tox-pypi-filter >= 0.10
skip_install = true
skipsdist = true

[testenv]
command = echo "test"

I get:

$ tox -rvv
using tox.ini: /home/tom/tmp/tox-venv/tox.ini (pid 12943)
  removing /home/tom/tmp/tox-venv/.tox/log
could not satisfy requires MissingDependency(<Requirement('pip>=19.3.1')>)
could not satisfy requires PackageNotFoundError('tox-pypi-filter')
using tox-3.14.5 from /home/tom/tmp/tox-venv/debug/lib/python3.7/site-packages/tox/__init__.py (pid 12943)
.tox start: getenv /home/tom/tmp/tox-venv/.tox/.tox
.tox cannot reuse: -r flag
.tox recreate: /home/tom/tmp/tox-venv/.tox/.tox
/home/tom/tmp/tox-venv/debug/bin/python (/home/tom/tmp/tox-venv/debug/bin/python) is {'executable': '/home/tom/tmp/tox-venv/debug/bin/python', 'name': 'python', 'version_info': [3, 7, 5, 'final', 0], 'version': '3.7.5 (default, Nov 20 2019, 09:21:52) \n[GCC 9.2.1 20191008]', 'is_64': True, 'sysplatform': 'linux'}
.tox uses /home/tom/tmp/tox-venv/debug/bin/python
  removing /home/tom/tmp/tox-venv/.tox/.tox
setting PATH=/home/tom/tmp/tox-venv/.tox/.tox/bin:/home/tom/tmp/tox-venv/debug/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin:/usr/local/cuda/bin
[12945] /home/tom/tmp/tox-venv/.tox$ /home/tom/tmp/tox-venv/debug/bin/python -m virtualenv --no-download --python /home/tom/tmp/tox-venv/debug/bin/python .tox
created virtual environment CPython3.7.5.final.0-64 in 68ms
  creator CPython3Posix(dest=/home/tom/tmp/tox-venv/.tox/.tox, clear=False, global=False)
  seeder FromAppData(download=False, pip=latest, setuptools=latest, wheel=latest, via=copy, app_data_dir=/home/tom/.local/share/virtualenv/seed-app-data/v1.0.1)
  activators BashActivator,CShellActivator,FishActivator,PowerShellActivator,PythonActivator,XonshActivator
.tox installdeps: setuptools >= 30.3.0, pip >= 19.3.1, tox-pypi-filter >= 0.10, tox >= 3.14.5
setting PATH=/home/tom/tmp/tox-venv/.tox/.tox/bin:/home/tom/tmp/tox-venv/debug/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin:/usr/local/cuda/bin
[12953] /home/tom/tmp/tox-venv$ /home/tom/tmp/tox-venv/.tox/.tox/bin/python -m pip install 'setuptools >= 30.3.0' 'pip >= 19.3.1' 'tox-pypi-filter >= 0.10' 'tox >= 3.14.5'
Requirement already satisfied: setuptools>=30.3.0 in ./.tox/.tox/lib/python3.7/site-packages (46.0.0)
Requirement already satisfied: pip>=19.3.1 in ./.tox/.tox/lib/python3.7/site-packages (20.0.2)
Collecting tox-pypi-filter>=0.10
  Using cached tox_pypi_filter-0.10-py2.py3-none-any.whl (5.1 kB)
Collecting tox>=3.14.5
  Using cached tox-3.14.5-py2.py3-none-any.whl (81 kB)
Collecting pypicky>=0.5
  Using cached pypicky-0.5-py2.py3-none-any.whl (4.8 kB)
Collecting py<2,>=1.4.17
  Using cached py-1.8.1-py2.py3-none-any.whl (83 kB)
Collecting filelock<4,>=3.0.0
  Using cached filelock-3.0.12-py3-none-any.whl (7.6 kB)
Collecting virtualenv>=16.0.0
  Using cached virtualenv-20.0.11-py2.py3-none-any.whl (4.6 MB)
Collecting toml>=0.9.4
  Using cached toml-0.10.0-py2.py3-none-any.whl (25 kB)
Collecting importlib-metadata<2,>=0.12; python_version < "3.8"
  Using cached importlib_metadata-1.5.0-py2.py3-none-any.whl (30 kB)
Collecting six<2,>=1.14.0
  Using cached six-1.14.0-py2.py3-none-any.whl (10 kB)
Collecting pluggy<1,>=0.12.0
  Using cached pluggy-0.13.1-py2.py3-none-any.whl (18 kB)
Collecting packaging>=14
  Using cached packaging-20.3-py2.py3-none-any.whl (37 kB)
Processing /home/tom/.cache/pip/wheels/93/84/2f/409c7b2bb3afc3aa727f7ee8787975e0793f74d1165f4d0104/tornado-6.0.4-cp37-cp37m-linux_x86_64.whl
Collecting click
  Using cached click-7.1.1-py2.py3-none-any.whl (82 kB)
Processing /home/tom/.cache/pip/wheels/c6/e5/ef/a12b26033eee476b7ebdd797528faa1765feae6e3b33a3954b/requirements_parser-0.2.0-cp37-none-any.whl
Collecting requests
  Using cached requests-2.23.0-py2.py3-none-any.whl (58 kB)
Processing /home/tom/.cache/pip/wheels/6e/e8/db/c73dae4867666e89ba3cfbc4b5c092446f0e584eda6f409cbb/distlib-0.3.0-cp37-none-any.whl
Collecting appdirs<2,>=1.4.3
  Using cached appdirs-1.4.3-py2.py3-none-any.whl (12 kB)
Collecting zipp>=0.5
  Using cached zipp-3.1.0-py3-none-any.whl (4.9 kB)
Collecting pyparsing>=2.0.2
  Using cached pyparsing-2.4.6-py2.py3-none-any.whl (67 kB)
Collecting idna<3,>=2.5
  Using cached idna-2.9-py2.py3-none-any.whl (58 kB)
Collecting chardet<4,>=3.0.2
  Using cached chardet-3.0.4-py2.py3-none-any.whl (133 kB)
Collecting urllib3!=1.25.0,!=1.25.1,<1.26,>=1.21.1
  Using cached urllib3-1.25.8-py2.py3-none-any.whl (125 kB)
Collecting certifi>=2017.4.17
  Using cached certifi-2019.11.28-py2.py3-none-any.whl (156 kB)
Installing collected packages: tornado, click, requirements-parser, idna, chardet, urllib3, certifi, requests, pypicky, py, filelock, zipp, importlib-metadata, distlib, six, appdirs, virtualenv, toml, pluggy, pyparsing, packaging, tox, tox-pypi-filter
Successfully installed appdirs-1.4.3 certifi-2019.11.28 chardet-3.0.4 click-7.1.1 distlib-0.3.0 filelock-3.0.12 idna-2.9 importlib-metadata-1.5.0 packaging-20.3 pluggy-0.13.1 py-1.8.1 pyparsing-2.4.6 pypicky-0.5 requests-2.23.0 requirements-parser-0.2.0 six-1.14.0 toml-0.10.0 tornado-6.0.4 tox-3.14.5 tox-pypi-filter-0.10 urllib3-1.25.8 virtualenv-20.0.11 zipp-3.1.0
.tox finish: getenv /home/tom/tmp/tox-venv/.tox/.tox after 2.63 seconds
.tox start: finishvenv 
write config to /home/tom/tmp/tox-venv/.tox/.tox/.tox-config1 as 'f266e02cc7b0e6d736bfee1e8174ac05d1fd0a91caf7784720cdee071ead18a0 /home/tom/tmp/tox-venv/debug/bin/python\n3.14.5 0 0 0\n00000000000000000000000000000000 setuptools >= 30.3.0\n00000000000000000000000000000000 pip >= 19.3.1\n00000000000000000000000000000000 tox-pypi-filter >= 0.10\n00000000000000000000000000000000 tox >= 3.14.5'
.tox finish: finishvenv  after 0.01 seconds
.tox start: provision 
[12960] /home/tom/tmp/tox-venv$ /home/tom/tmp/tox-venv/.tox/.tox/bin/python -m tox -rvv
using tox.ini: /home/tom/tmp/tox-venv/tox.ini (pid 12960)
using tox-3.14.5 from /home/tom/tmp/tox-venv/.tox/.tox/lib/python3.7/site-packages/tox/__init__.py (pid 12960)
skipping sdist step
test start: getenv /home/tom/tmp/tox-venv/.tox/test
test cannot reuse: -r flag
test create: /home/tom/tmp/tox-venv/.tox/test
/home/tom/tmp/tox-venv/.tox/.tox/bin/python (/home/tom/tmp/tox-venv/.tox/.tox/bin/python) is {'executable': '/home/tom/tmp/tox-venv/.tox/.tox/bin/python', 'name': 'python', 'version_info': [3, 7, 5, 'final', 0], 'version': '3.7.5 (default, Nov 20 2019, 09:21:52) \n[GCC 9.2.1 20191008]', 'is_64': True, 'sysplatform': 'linux'}
test uses /home/tom/tmp/tox-venv/.tox/.tox/bin/python
  removing /home/tom/tmp/tox-venv/.tox/test
setting PATH=/home/tom/tmp/tox-venv/.tox/test/bin:/home/tom/tmp/tox-venv/debug/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin:/usr/local/cuda/bin
[12963] /home/tom/tmp/tox-venv/.tox$ /home/tom/tmp/tox-venv/.tox/.tox/bin/python -m virtualenv --no-download --python .tox/bin/python test
RuntimeError: failed to find interpreter for Builtin discover of python_spec='.tox/bin/python'
ERROR: invocation failed (exit code 1)
ERROR: InvocationError for command /home/tom/tmp/tox-venv/.tox/.tox/bin/python -m virtualenv --no-download --python .tox/bin/python test (exited with code 1)
test finish: getenv /home/tom/tmp/tox-venv/.tox/test after 0.07 seconds
____________________________________________________________ summary ____________________________________________________________
ERROR:   test: InvocationError for command /home/tom/tmp/tox-venv/.tox/.tox/bin/python -m virtualenv --no-download --python .tox/bin/python test (exited with code 1)
.tox finish: provision  after 0.23 seconds

If I add:

    virtualenv < 20

to the requires section, everything works fine.

[gaborbernat]

Can you test if it works with virtualenv 20.0.10? Feels this could be pypa/virtualenv#1732

[gaborbernat]

A fix went in via pypa/virtualenv#1734

[astrofrog]

Thanks for the fix!

[gaborbernat]

Will release soon

[gaborbernat]

Done.

[astrofrog]

Thanks! 👏