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Why does tox -l only show python when file is setup.cfg instead of tox.ini? #545

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Flimm opened this issue Jul 7, 2017 · 11 comments
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@Flimm
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@Flimm Flimm commented Jul 7, 2017

Here's how I can reproduce the bug:

$ virtualenv -p python3 env
$ source env/bin/activate
$ pip install tox
$ ls
env
$ printf '[tox]\nenvlist = py26,py27,py33\n' > setup.cfg
$ cat setup.cfg
[tox]
envlist = py26,py27,py33
$ tox -l
python
$ mv setup.cfg tox.ini
$ tox -l
py26
py27
py33

What is going on? Why is tox -l behaving differently for identical content, the only difference between whether the configuration is loaded from setup.cfg or tox.ini?

Additional debug info:

$ pip list
Package    Version
---------- -------
pip        9.0.1
pluggy     0.4.0
py         1.4.34
setuptools 36.0.1
tox        2.7.0
virtualenv 15.1.0
wheel      0.29.0

I'm on macOS.

@obestwalter
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@obestwalter obestwalter commented Jul 8, 2017

Hi @Flimm, what gave you the impression that it is supposed to work at all? AFAIK this was a hotly discussed topic, but never came to fruition: #297

Searching the docs a mention of some experimental feature for 2.4.0 comes up, but there are no docs, so I don't even know what it is supposed to be doing:

(experimental) New feature: When a search for a config file fails, tox tries loading setup.cfg with a section prefix of “tox”.

So I would argue that the actual bug is, that tox does not crash with a helpful error, if somebody tries to use setup.cfg for configuring tox.

And maybe we need to remove that experimental code, as it is not doing anything useful I can see.

@Flimm
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@Flimm Flimm commented Jul 8, 2017

Several things give me the impression that tox is meant to read from setup.cfg.

  1. It seems to read successfully from setup.cfg in some projects, for instance https://github.com/jazzband/sorl-thumbnail . I was trying to understand why it wouldn't on my machine, but did for Travis CI.

  2. The changelog entry you pointed out says that "tox tries loading setup.cfg".

  3. The verbose output of tox -lv says that it is trying to read setup.cfg:

$ tox -lv
using tox.ini: /home/flimm/git/flimm/bla/setup.cfg
using tox-2.7.0 from /home/flimm/git/flimm/bla/env/lib/python3.5/site-packages/tox/__init__.py
default environments:
python -> [no description]

Now that you point it out, documentation about setup.cfg is lacking.

I'm fine with removing support for setup.cfg, whatever you think is best.

@obestwalter
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@obestwalter obestwalter commented Jul 8, 2017

Hey, thanks for summarizing. Sorry if I came over a bit snarky :)

I personally am perfectly happy with using only tox.ini for config, but as this being used in the wild already we can't just remove it without deprecating it first.

Let's wait if others have opinions ...

@gaborbernat
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@gaborbernat gaborbernat commented Jul 16, 2017

As far as we can keep the tox configuration adhere to the ini specification I see no harm in actually having full setup.cfg support. At that point it is just a detail of from where we get the content to extract the project configuration from. I would actually be interested in making this work 100%.

@obestwalter
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@obestwalter obestwalter commented Jul 16, 2017

@gaborbernat - please see this discussion: #297 - there is no agreement if this should work or if it would actually be better to leave it out.

@obestwalter
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@obestwalter obestwalter commented Jul 16, 2017

Especially see this comment by @The-Compiler mentioning that it caused pain trying to support this in pytest and that they want to drop the support again: #297 (comment)

@obestwalter
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@obestwalter obestwalter commented Sep 2, 2017

@Flimm - I am digging through the code atm and saw that at least your example should work already (only different).

The thing is that you need to use the section prefix 'tox' for all tox related sections (also for the global tox section), so if you do it that way it should work as expected:

setup.cfg:

[tox:tox]
envlist = py35,py36

tox -l:

py35
py37

If this weren't an experimental feature I would expect either the parsing to fail if I only have a [tox] section or have the global section work without the prefix and only expect the prefix for subsections.

@Flimm
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@Flimm Flimm commented Sep 4, 2017

@obestwalter Thanks. If I use [tox:tox] in setup.cfg, it does indeed seem to work.

In this repo, tox seems to be able to pick up a [tox] section setup.cfg without the section prefix. I'm mystified as to why.

@obestwalter
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@obestwalter obestwalter commented Sep 4, 2017

I was also mystified, so I tried it with that repo - it doesn't work. So this might be a regression - it might have worked at some point in the past, but I think namespaces are a honking great idea, so the way it works now is actually the right way to go.

@RonnyPfannschmidt
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@RonnyPfannschmidt RonnyPfannschmidt commented Sep 4, 2017

wow, that prefix stuff is a scary mess - its a perfect example of when people should say no to a feature

@gaborbernat
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@gaborbernat gaborbernat commented Sep 15, 2018

The only thing remaining for this is to document the tox:tox thing.

@gaborbernat gaborbernat added this to the 3.4 milestone Sep 15, 2018
gaborbernat added a commit to gaborbernat/tox that referenced this issue Sep 16, 2018
@helpr helpr bot added the pr-available label Sep 16, 2018
gaborbernat added a commit that referenced this issue Sep 16, 2018
@helpr helpr bot added pr-merged and removed pr-available labels Sep 16, 2018
DmytroLitvinov added a commit to DmytroLitvinov/kuna that referenced this issue Sep 24, 2018



### Update [tox](https://pypi.org/project/tox) from **3.2.1** to **3.4.0**.


<details>
  <summary>Changelog</summary>
  
  
   ### 3.4.0
   ```
   ------------------

Bugfixes
^^^^^^^^

- add ``--exists-action w`` to default pip flags to handle better VCS dependencies (`pip documentation on this &lt;https://pip.pypa.io/en/latest/reference/pip/exists-action-option&gt;`_) - by :user:`gaborbernat` (`503 &lt;https://github.com/tox-dev/tox/issues/503&gt;`_)
- instead of assuming the Python version from the base python name ask the interpreter to reveal the version for the ``ignore_basepython_conflict`` flag - by :user:`gaborbernat` (`908 &lt;https://github.com/tox-dev/tox/issues/908&gt;`_)
- PEP-517 packaging fails with sdist already exists, fixed via ensuring the dist folder is empty before invoking the backend and `pypa/setuptools 1481 &lt;https://github.com/pypa/setuptools/pull/1481&gt;`_ - by :user:`gaborbernat` (`1003 &lt;https://github.com/tox-dev/tox/issues/1003&gt;`_)


Features
^^^^^^^^

- add ``commands_pre`` and ``commands_post`` that run before and after running
  the ``commands`` (setup runs always, commands only if setup suceeds, teardown always - all
  run until the first failing command)  - by :user:`gaborbernat` (`167 &lt;https://github.com/tox-dev/tox/issues/167&gt;`_)
- ``pyproject.toml`` config support initially by just inline the tox.ini under ``tool.tox.legacy_tox_ini`` key; config source priority order is ``pyproject.toml``, ``tox.ini`` and then ``setup.cfg`` - by :user:`gaborbernat` (`814 &lt;https://github.com/tox-dev/tox/issues/814&gt;`_)
- use the os environment variable ``TOX_SKIP_ENV`` to filter out tox environment names from the run list (set by ``envlist``)  - by :user:`gaborbernat` (`824 &lt;https://github.com/tox-dev/tox/issues/824&gt;`_)
- always set ``PIP_USER=0`` (do not install into the user site package, but inside the virtual environment created) and ``PIP_NO_DEPS=0`` (installing without dependencies can cause broken package installations) inside tox - by :user:`gaborbernat` (`838 &lt;https://github.com/tox-dev/tox/issues/838&gt;`_)
- tox will inject some environment variables that to indicate a command is running within tox: ``TOX_WORK_DIR`` env var is set to the tox work directory,
  ``TOX_ENV_NAME`` is set to the current running tox environment name, ``TOX_ENV_DIR`` is set to the current tox environments working dir - by :user:`gaborbernat` (`847 &lt;https://github.com/tox-dev/tox/issues/847&gt;`_)
- While running tox invokes various commands (such as building the package, pip installing dependencies and so on), these were printed in case they failed as Python arrays. Changed the representation to a shell command, allowing the users to quickly replicate/debug the failure on their own - by :user:`gaborbernat` (`851 &lt;https://github.com/tox-dev/tox/issues/851&gt;`_)
- skip missing interpreters value from the config file can now be overridden via the ``--skip-missing-interpreters`` cli flag - by :user:`gaborbernat` (`903 &lt;https://github.com/tox-dev/tox/issues/903&gt;`_)
- keep additional environments config order when listing them - by :user:`gaborbernat` (`921 &lt;https://github.com/tox-dev/tox/issues/921&gt;`_)
- allow injecting config value inside the ini file dependent of the fact that we&#39;re connected to an interactive shell or not  - by :user:`gaborbernat` (`947 &lt;https://github.com/tox-dev/tox/issues/947&gt;`_)
- do not build sdist if skip install is specified for the envs to be run - by :user:`gaborbernat` (`974 &lt;https://github.com/tox-dev/tox/issues/974&gt;`_)
- when verbosity level increases above two start passing through verbosity flags to pip - by :user:`gaborbernat` (`982 &lt;https://github.com/tox-dev/tox/issues/982&gt;`_)
- when discovering the interpreter to use check if the tox host Python matches and use that if so - by :user:`gaborbernat` (`994 &lt;https://github.com/tox-dev/tox/issues/994&gt;`_)
- ``-vv`` will print out why a virtual environment is re-created whenever this operation is triggered - by :user:`gaborbernat` (`1004 &lt;https://github.com/tox-dev/tox/issues/1004&gt;`_)


Documentation
^^^^^^^^^^^^^

- clarify that ``python`` and ``pip`` refer to the virtual environments executable - by :user:`gaborbernat` (`305 &lt;https://github.com/tox-dev/tox/issues/305&gt;`_)
- add Sphinx and mkdocs example of generating documentation via tox - by :user:`gaborbernat` (`374 &lt;https://github.com/tox-dev/tox/issues/374&gt;`_)
- specify that ``setup.cfg`` tox configuration needs to be inside the ``tox:tox`` namespace - by :user:`gaborbernat` (`545 &lt;https://github.com/tox-dev/tox/issues/545&gt;`_)
   ```
   
  
  
   ### 3.3.0
   ```
   ------------------

Bugfixes
^^^^^^^^

- fix ``TOX_LIMITED_SHEBANG`` when running under python3 - by :user:`asottile` (`931 &lt;https://github.com/tox-dev/tox/issues/931&gt;`_)


Features
^^^^^^^^

- `PEP-517 &lt;https://www.python.org/dev/peps/pep-0517/&gt;`_ source distribution support (create a
  ``.package`` virtual environment to perform build operations inside) by :user:`gaborbernat` (`573 &lt;https://github.com/tox-dev/tox/issues/573&gt;`_)
- `flit &lt;https://flit.readthedocs.io&gt;`_ support via implementing ``PEP-517`` by :user:`gaborbernat` (`820 &lt;https://github.com/tox-dev/tox/issues/820&gt;`_)
- packaging now is exposed as a hook via ``tox_package(session, venv)`` - by :user:`gaborbernat` (`951 &lt;https://github.com/tox-dev/tox/issues/951&gt;`_)


Miscellaneous
^^^^^^^^^^^^^

- Updated the VSTS build YAML to use the latest jobs and pools syntax - by :user:`davidstaheli` (`955 &lt;https://github.com/tox-dev/tox/issues/955&gt;`_)
   ```
   
  
</details>


 

<details>
  <summary>Links</summary>
  
  - PyPI: https://pypi.org/project/tox
  - Changelog: https://pyup.io/changelogs/tox/
  - Docs: https://tox.readthedocs.org/
</details>





### Update [Sphinx](https://pypi.org/project/Sphinx) from **1.8.0** to **1.8.1**.


<details>
  <summary>Changelog</summary>
  
  
   ### 1.8.1
   ```
   =====================================

Incompatible changes
--------------------

* LaTeX ``\pagestyle`` commands have been moved to the LaTeX template. No
  changes in PDF, except possibly if ``\sphinxtableofcontents``, which
  contained them, had been customized in :file:`conf.py`. (refs: 5455)

Bugs fixed
----------

* 5418: Incorrect default path for sphinx-build -d/doctrees files
* 5421: autodoc emits deprecation warning for :confval:`autodoc_default_flags`
* 5422: lambda object causes PicklingError on storing environment
* 5417: Sphinx fails to build with syntax error in Python 2.7.5
* 4911: add latexpdf to make.bat for non make-mode
* 5436: Autodoc does not work with enum subclasses with properties/methods
* 5437: autodoc: crashed on modules importing eggs
* 5433: latex: ImportError: cannot import name &#39;DEFAULT_SETTINGS&#39;
* 5431: autodoc: ``autofunction`` emits a warning for callable objects
* 5457: Fix TypeError in error message when override is prohibited
* 5453: PDF builds of &#39;howto&#39; documents have no page numbers
* 5463: mathbase: math_role and MathDirective was disappeared in 1.8.0
* 5454: latex: Index has disappeared from PDF for Japanese documents
* 5432: py domain: ``:type:`` field can&#39;t process ``:term:`` references
* 5426: py domain: TypeError has been raised for class attribute
   ```
   
  
</details>


 

<details>
  <summary>Links</summary>
  
  - PyPI: https://pypi.org/project/sphinx
  - Changelog: https://pyup.io/changelogs/sphinx/
  - Homepage: http://sphinx-doc.org/
</details>





### Update [twine](https://pypi.org/project/twine) from **1.11.0** to **1.12.0**.


<details>
  <summary>Changelog</summary>
  
  
   ### 1.12.0
   ```
   * :feature:`395 major` Add ``twine check`` command to check long description
* :feature:`392 major` Drop support for Python 3.3
* :feature:`363` Empower ``--skip-existing`` for Artifactory repositories
* 🐛`367` Avoid MD5 when Python is compiled in FIPS mode
   ```
   
  
</details>


 

<details>
  <summary>Links</summary>
  
  - PyPI: https://pypi.org/project/twine
  - Changelog: https://pyup.io/changelogs/twine/
  - Docs: https://twine.readthedocs.io/
</details>
guykisel added a commit to guykisel/inline-plz that referenced this issue Sep 24, 2018
This PR updates [tox](https://pypi.org/project/tox) from **3.1.2** to **3.4.0**.



<details>
  <summary>Changelog</summary>
  
  
   ### 3.4.0
   ```
   ------------------

Bugfixes
^^^^^^^^

- add ``--exists-action w`` to default pip flags to handle better VCS dependencies (`pip documentation on this &lt;https://pip.pypa.io/en/latest/reference/pip/exists-action-option&gt;`_) - by :user:`gaborbernat` (`503 &lt;https://github.com/tox-dev/tox/issues/503&gt;`_)
- instead of assuming the Python version from the base python name ask the interpreter to reveal the version for the ``ignore_basepython_conflict`` flag - by :user:`gaborbernat` (`908 &lt;https://github.com/tox-dev/tox/issues/908&gt;`_)
- PEP-517 packaging fails with sdist already exists, fixed via ensuring the dist folder is empty before invoking the backend and `pypa/setuptools 1481 &lt;https://github.com/pypa/setuptools/pull/1481&gt;`_ - by :user:`gaborbernat` (`1003 &lt;https://github.com/tox-dev/tox/issues/1003&gt;`_)


Features
^^^^^^^^

- add ``commands_pre`` and ``commands_post`` that run before and after running
  the ``commands`` (setup runs always, commands only if setup suceeds, teardown always - all
  run until the first failing command)  - by :user:`gaborbernat` (`167 &lt;https://github.com/tox-dev/tox/issues/167&gt;`_)
- ``pyproject.toml`` config support initially by just inline the tox.ini under ``tool.tox.legacy_tox_ini`` key; config source priority order is ``pyproject.toml``, ``tox.ini`` and then ``setup.cfg`` - by :user:`gaborbernat` (`814 &lt;https://github.com/tox-dev/tox/issues/814&gt;`_)
- use the os environment variable ``TOX_SKIP_ENV`` to filter out tox environment names from the run list (set by ``envlist``)  - by :user:`gaborbernat` (`824 &lt;https://github.com/tox-dev/tox/issues/824&gt;`_)
- always set ``PIP_USER=0`` (do not install into the user site package, but inside the virtual environment created) and ``PIP_NO_DEPS=0`` (installing without dependencies can cause broken package installations) inside tox - by :user:`gaborbernat` (`838 &lt;https://github.com/tox-dev/tox/issues/838&gt;`_)
- tox will inject some environment variables that to indicate a command is running within tox: ``TOX_WORK_DIR`` env var is set to the tox work directory,
  ``TOX_ENV_NAME`` is set to the current running tox environment name, ``TOX_ENV_DIR`` is set to the current tox environments working dir - by :user:`gaborbernat` (`847 &lt;https://github.com/tox-dev/tox/issues/847&gt;`_)
- While running tox invokes various commands (such as building the package, pip installing dependencies and so on), these were printed in case they failed as Python arrays. Changed the representation to a shell command, allowing the users to quickly replicate/debug the failure on their own - by :user:`gaborbernat` (`851 &lt;https://github.com/tox-dev/tox/issues/851&gt;`_)
- skip missing interpreters value from the config file can now be overridden via the ``--skip-missing-interpreters`` cli flag - by :user:`gaborbernat` (`903 &lt;https://github.com/tox-dev/tox/issues/903&gt;`_)
- keep additional environments config order when listing them - by :user:`gaborbernat` (`921 &lt;https://github.com/tox-dev/tox/issues/921&gt;`_)
- allow injecting config value inside the ini file dependent of the fact that we&#39;re connected to an interactive shell or not  - by :user:`gaborbernat` (`947 &lt;https://github.com/tox-dev/tox/issues/947&gt;`_)
- do not build sdist if skip install is specified for the envs to be run - by :user:`gaborbernat` (`974 &lt;https://github.com/tox-dev/tox/issues/974&gt;`_)
- when verbosity level increases above two start passing through verbosity flags to pip - by :user:`gaborbernat` (`982 &lt;https://github.com/tox-dev/tox/issues/982&gt;`_)
- when discovering the interpreter to use check if the tox host Python matches and use that if so - by :user:`gaborbernat` (`994 &lt;https://github.com/tox-dev/tox/issues/994&gt;`_)
- ``-vv`` will print out why a virtual environment is re-created whenever this operation is triggered - by :user:`gaborbernat` (`1004 &lt;https://github.com/tox-dev/tox/issues/1004&gt;`_)


Documentation
^^^^^^^^^^^^^

- clarify that ``python`` and ``pip`` refer to the virtual environments executable - by :user:`gaborbernat` (`305 &lt;https://github.com/tox-dev/tox/issues/305&gt;`_)
- add Sphinx and mkdocs example of generating documentation via tox - by :user:`gaborbernat` (`374 &lt;https://github.com/tox-dev/tox/issues/374&gt;`_)
- specify that ``setup.cfg`` tox configuration needs to be inside the ``tox:tox`` namespace - by :user:`gaborbernat` (`545 &lt;https://github.com/tox-dev/tox/issues/545&gt;`_)
   ```
   
  
  
   ### 3.3.0
   ```
   ------------------

Bugfixes
^^^^^^^^

- fix ``TOX_LIMITED_SHEBANG`` when running under python3 - by :user:`asottile` (`931 &lt;https://github.com/tox-dev/tox/issues/931&gt;`_)


Features
^^^^^^^^

- `PEP-517 &lt;https://www.python.org/dev/peps/pep-0517/&gt;`_ source distribution support (create a
  ``.package`` virtual environment to perform build operations inside) by :user:`gaborbernat` (`573 &lt;https://github.com/tox-dev/tox/issues/573&gt;`_)
- `flit &lt;https://flit.readthedocs.io&gt;`_ support via implementing ``PEP-517`` by :user:`gaborbernat` (`820 &lt;https://github.com/tox-dev/tox/issues/820&gt;`_)
- packaging now is exposed as a hook via ``tox_package(session, venv)`` - by :user:`gaborbernat` (`951 &lt;https://github.com/tox-dev/tox/issues/951&gt;`_)


Miscellaneous
^^^^^^^^^^^^^

- Updated the VSTS build YAML to use the latest jobs and pools syntax - by :user:`davidstaheli` (`955 &lt;https://github.com/tox-dev/tox/issues/955&gt;`_)
   ```
   
  
  
   ### 3.2.1
   ```
   ------------------

Bugfixes
^^^^^^^^

- ``--parallel--safe-build`` no longer cleans up its folders (``distdir``, ``distshare``, ``log``). - by :user:`gaborbernat` (`849 &lt;https://github.com/tox-dev/tox/issues/849&gt;`_)
   ```
   
  
  
   ### 3.2.0
   ```
   ------------------

Features
^^^^^^^^

- Switch pip invocations to use the module ``-m pip`` instead of direct invocation. This could help
  avoid some of the shebang limitations.  - by :user:`gaborbernat` (`935 &lt;https://github.com/tox-dev/tox/issues/935&gt;`_)
- Ability to specify package requirements for the tox run via the ``tox.ini`` (``tox`` section under key ``requires`` - PEP-508 style): can be used to specify both plugin requirements or build dependencies. - by :user:`gaborbernat` (`783 &lt;https://github.com/tox-dev/tox/issues/783&gt;`_)
- Allow to run multiple tox instances in parallel by providing the
  ``--parallel--safe-build`` flag. - by :user:`gaborbernat` (`849 &lt;https://github.com/tox-dev/tox/issues/849&gt;`_)
   ```
   
  
  
   ### 3.1.3
   ```
   ------------------

Bugfixes
^^^^^^^^

- A caching issue that caused the ``develop-inst-nodeps`` action, which
  reinstalls the package under test, to always run has been resolved. The
  ``develop-inst-noop`` action, which, as the name suggests, is a no-op, will now
  run unless there are changes to ``setup.py`` or ``setup.cfg`` files that have
  not been reflected - by stephenfin (`909 &lt;https://github.com/tox-dev/tox/issues/909&gt;`_)


Features
^^^^^^^^

- Python version testenvs are now automatically detected instead of comparing
  against a hard-coded list of supported versions.  This enables ``py38`` and
  eventually ``py39`` / ``py40`` / etc. to work without requiring an upgrade to
  ``tox``.  As such, the following public constants are now deprecated
  (and scheduled for removal in ``tox`` 4.0: ``CPYTHON_VERSION_TUPLES``,
  ``PYPY_VERSION_TUPLES``, ``OTHER_PYTHON_INTERPRETERS``, and ``DEFAULT_FACTORS`` -
  by :user:`asottile` (`914 &lt;https://github.com/tox-dev/tox/issues/914&gt;`_)


Documentation
^^^^^^^^^^^^^

- Add a system overview section on the index page that explains briefly how tox works -
  by :user:`gaborbernat`. (`867 &lt;https://github.com/tox-dev/tox/issues/867&gt;`_)
   ```
   
  
</details>


 

<details>
  <summary>Links</summary>
  
  - PyPI: https://pypi.org/project/tox
  - Changelog: https://pyup.io/changelogs/tox/
  - Docs: https://tox.readthedocs.org/
</details>
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