pipenv fails to install python with pyenv in non-interactive environments

I have setup pipenv and pyenv in a CI system, with the expectation that if a required version of python was not installed pipenv would invoke pyenv to install the correct version. This works fine in an interactive terminal but fails when run in the CI system.

When attempting to execute “pipenv install” I get the following error:

Warning: Your Pipfile requires python_version 3.7, but you are using 2.7.14 (/opt/j/home/.local/share/v/s/bin/python).
  $ pipenv --rm and rebuilding the virtual environment may resolve the issue.
  $ pipenv check will surely fail.
Launching subshell in virtual environment…
Traceback (most recent call last):
  File "/usr/local/bin/pipenv", line 11, in <module>
    sys.exit(cli())
  File "/usr/local/lib/python2.7/site-packages/pipenv/vendor/click/core.py", line 764, in __call__
    return self.main(*args, **kwargs)
  File "/usr/local/lib/python2.7/site-packages/pipenv/vendor/click/core.py", line 717, in main
    rv = self.invoke(ctx)
  File "/usr/local/lib/python2.7/site-packages/pipenv/vendor/click/core.py", line 1137, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
  File "/usr/local/lib/python2.7/site-packages/pipenv/vendor/click/core.py", line 956, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "/usr/local/lib/python2.7/site-packages/pipenv/vendor/click/core.py", line 555, in invoke
    return callback(*args, **kwargs)
  File "/usr/local/lib/python2.7/site-packages/pipenv/vendor/click/decorators.py", line 64, in new_func
    return ctx.invoke(f, obj, *args, **kwargs)
  File "/usr/local/lib/python2.7/site-packages/pipenv/vendor/click/core.py", line 555, in invoke
    return callback(*args, **kwargs)
  File "/usr/local/lib/python2.7/site-packages/pipenv/cli/command.py", line 374, in shell
    pypi_mirror=state.pypi_mirror,
  File "/usr/local/lib/python2.7/site-packages/pipenv/core.py", line 2088, in do_shell
    shell.fork_compat(*fork_args)
  File "/usr/local/lib/python2.7/site-packages/pipenv/shells.py", line 121, in fork_compat
    c.interact(escape_character=None)
  File "/usr/local/lib/python2.7/site-packages/pipenv/vendor/pexpect/pty_spawn.py", line 761, in interact
    mode = tty.tcgetattr(self.STDIN_FILENO)
termios.error: (25, 'Inappropriate ioctl for device')

I see a similar issue was reported with “pipenv run” in https://github.com/pypa/pipenv/issues/290

Is there a way to handle the scenario where a specified version of python doesn’t exist in a headless environment? And if no, can “pipenv install” also be modified to use the --no-interactive flag?

[max-wittig]

I think it’s strange that pipenv can’t handle non-interactive environments by default. Poetry can.

But when I run pipenv run lint in GitLab CI it just hangs there forever, without even invoking shell.

$ pipenv run lint
Creating a virtualenv for this project…
Pipfile: /builds/***/***/Pipfile
Using /usr/bin/python3 (3.7.1) to create virtualenv…

Edit: Using something like gitlab-ci with docker executors. So I guess inside a python:3.7 docker image, where no interactive mode exists

[gitaarik]

I also have this issue in combination with Powerlevel10k’s instant prompt. The 2022.1.8 version that you are talking about @matteius also has the same issue still.