Poetry: Value Error on any poetry command invocation in Travis CI

[DorianCzichotzki]

• [x] I am on the latest Poetry version.
• [x] I have searched the issues of this repo and believe that this is not a duplicate.
• [x] If an exception occurs when executing a command, I executed it again in debug mode (-vvv option).

• OS version and name: Travis CI Python 3.7 environment (Ubuntu 16.04.5 LTS)
• Poetry version: 1.0.1
• Link of a Gist with the contents of your pyproject.toml file:

Issue

After installing poetry during the build every poetry command fails. See the output below.

$ python --version
Python 3.7.1
$ pip --version
pip 18.1 from /home/travis/virtualenv/python3.7.1/lib/python3.7/site-packages/pip (python 3.7)
install.1
3.27s$ curl -sSL https://raw.githubusercontent.com/python-poetry/poetry/master/get-poetry.py | python
Retrieving Poetry metadata
# Welcome to Poetry!
This will download and install the latest version of Poetry,
a dependency and package manager for Python.
It will add the `poetry` command to Poetry's bin directory, located at:
$HOME/.poetry/bin
This path will then be added to your `PATH` environment variable by
modifying the profile files located at:
$HOME/.profile
$HOME/.bash_profile
You can uninstall at any time by executing this script with the --uninstall option,
and these changes will be reverted.
Installing version: 1.0.1
  - Downloading poetry-1.0.1-linux.tar.gz (27.78MB)
Poetry (1.0.1) is installed now. Great!
To get started you need Poetry's bin directory ($HOME/.poetry/bin) in your `PATH`
environment variable. Next time you log in this will be done
automatically.
To configure your current shell run `source $HOME/.poetry/env`
install.2
0.01s$ source $HOME/.poetry/env
1.29s$ poetry --version -vvv
[ValueError]
invalid width -1 (must be > 0)
Traceback (most recent call last):
  File "/home/travis/.poetry/lib/poetry/_vendor/py3.7/clikit/console_application.py", line 131, in run
    status_code = command.handle(parsed_args, io)
  File "/home/travis/.poetry/lib/poetry/_vendor/py3.7/clikit/api/command/command.py", line 120, in handle
    status_code = self._do_handle(args, io)
  File "/home/travis/.poetry/lib/poetry/_vendor/py3.7/clikit/api/command/command.py", line 163, in _do_handle
    self._dispatcher.dispatch(PRE_HANDLE, event)
  File "/home/travis/.poetry/lib/poetry/_vendor/py3.7/clikit/api/event/event_dispatcher.py", line 22, in dispatch
    self._do_dispatch(listeners, event_name, event)
  File "/home/travis/.poetry/lib/poetry/_vendor/py3.7/clikit/api/event/event_dispatcher.py", line 89, in _do_dispatch
    listener(event, event_name, self)
  File "/home/travis/.poetry/lib/poetry/_vendor/py3.7/clikit/config/default_application_config.py", line 160, in print_version
    version.render(event.io)
  File "/home/travis/.poetry/lib/poetry/_vendor/py3.7/clikit/ui/components/name_version.py", line 28, in render
    paragraph.render(io, indentation)
  File "/home/travis/.poetry/lib/poetry/_vendor/py3.7/clikit/ui/components/paragraph.py", line 25, in render
    '
'".join(textwrap.wrap(self._text, text_width)),
  File "m/opt/python/3.7.1/lib/python3.7/textwrap.py", line 379, in wrap
    return w.wrap(text)
  File "/opt/python/3.7.1/lib/python3.7/textwrap.py", line 354, in wrap
    return self._wrap_chunks(chunks)
  File "/opt/python/3.7.1/lib/python3.7/textwrap.py", line 248, in _wrap_chunks
    raise ValueError('invalid width %r (must be > 0)' % self.width)
The command "poetry --version -vvv" failed and exited with 1 during .
Your build has been stopped.

[sdispater]

Strange. Nothing has changed in CliKit between Poetry 1.0.0 and Poetry 1.0.1.

From what I can tell, the error is caused by CliKit seeing the terminal width as 0 causing the issue of the negative width in textwrap. This is not on Poetry's end, nor does it seem to be on CliKit's ends (a terminal width of 0 is obviously wrong).

You might want to try to set the LINES and COLUMNS environment variables to check if it solves the issue.

```bash
export COLUMNS=80
export LINES=20

[DorianCzichotzki]

@sdispater That fixed the issue. Thanks!

The build ran on an internal Travis instance.Therefore I am not sure if it is only an issue there.

Nothing has changed in CliKit between Poetry 1.0.0 and Poetry 1.0.1.

The issue appeared after switching to 1.0.0.