Let tox --listenvs list all defined environments, not only from envlist in [tox] section

[pytoxbot]

• Bitbucket: https://bitbucket.org/hpk42/tox/issue/271
• Originally reported by: vlcinsky
• Originally created at: 2015-08-28T00:01:52.447

Issue #52 asks for having a command to list all configured environments.

However, I found, that it lists only those environments, which are in envlist.

If I do not want to run some of the environments when tox is invoked without any argument, I keep the envlist in [tox] shorter. However, this does not print it out when::

$ tox -l

It would be nice to list all existing environments.

tox version: 2.1.1

OS: Debian Jessie

Python 2.7.9

Sample tox.ini:

#!ini

# Tox (http://tox.testrun.org/) is a tool for running tests
# in multiple virtualenvs. This configuration file will run the
# test suite on all supported python versions. To use it, "pip install tox"
# and then run "tox" from this directory.

[tox]
envlist = help
skipsdist = true

[testenv:help]
basepython = python2.7
commands = python -c "print(open('tox.help').read());" 
deps =

[testenv:docs]
basepython = python2.7
whitelist_externals =
    make
changedir = docs
commands = make html
deps = 
    -rrequirements-docs.txt

[testenv:testsamples]
basepython = python2.7
envdir = {toxworkdir}/test
commands = py.test -sv tests/test_samples.py
deps =
    -rrequirements-json.txt

[testenv:testschema]
basepython = python2.7
envdir = {toxworkdir}/test
commands = py.test -sv tests/test_schema.py
deps =
    -rrequirements-json.txt

[testenv:testyaml]
basepython = python2.7
envdir = {toxworkdir}/test
commands = py.test -sv tests/test_sample.py --yamlsample []
deps =
    -rrequirements-json.txt

[testenv:testjson]
basepython = python2.7
envdir = {toxworkdir}/test
commands = py.test -sv tests/test_sample.py --jsonsample []
deps =
    -rrequirements-json.txt

For given tox.ini it lists only help:

#!bash

$ tox --listenvs
help

and I would like to see there all:

#!bash

$ tox --listenvs
help
docs
testsamples
testschema
testyaml
testjson

[pytoxbot]

Original comment by @obestwalter

+1 That is actually what I as a tox user would expect tox --listenvs to print out.

[volans-]

+1, how a user could discover an environment not run by default?

[obestwalter]

how a user could discover an environment not run by default?

Until this issue is resolved only by looking for all [testenv:???]sections directly in the tox.ini of the project .

[gaborbernat]

created an implementation for this based on top of #489, I'll create the PR once that gets accepted 👍

[obestwalter]

fixed in #495