FileNotFoundError: [Errno 2] No such file or directory: 'locale'

[exarkun]

bash-4.3# pypi2nix -V "2.7" -e treq
Traceback (most recent call last):
  File "/nix/store/yaks2zlw5sj7l92srmji0gnl3bfc9jl8-pypi2nix-1.8.0/bin/.pypi2nix-wrapped", line 3, in <module>
    pypi2nix.cli.main()
  File "/nix/store/yaks2zlw5sj7l92srmji0gnl3bfc9jl8-pypi2nix-1.8.0/pkgs/click/core.py", line 722, in __call__
    return self.main(*args, **kwargs)
  File "/nix/store/yaks2zlw5sj7l92srmji0gnl3bfc9jl8-pypi2nix-1.8.0/pkgs/click/core.py", line 676, in main
    _verify_python3_env()
  File "/nix/store/yaks2zlw5sj7l92srmji0gnl3bfc9jl8-pypi2nix-1.8.0/pkgs/click/_unicodefun.py", line 64, in _verify_python3_env
    stderr=subprocess.PIPE).communicate()[0]
  File "/nix/store/06af6d830iawfqbla1vjzckpzmyqswvi-python3-3.5.2/lib/python3.5/subprocess.py", line 947, in __init__
    restore_signals, start_new_session)
  File "/nix/store/06af6d830iawfqbla1vjzckpzmyqswvi-python3-3.5.2/lib/python3.5/subprocess.py", line 1551, in _execute_child
    raise child_exception_type(errno_num, err_msg)
FileNotFoundError: [Errno 2] No such file or directory: 'locale'

[garbas]

@exarkun I have good news and bad news.

1. GOOD: the following command was able to generate Nix expressions

%  pypi2nix -V "2.7" -e treq -E "libffi openssl" -v

Keep in mind that I was using pypi2nix from current master.

2. BAD: generated nix expressions include many circular dependencies which are quite common with Twisted and zope like packages. This can be usually solved with requirements_override.nix but I'm lacking the knowledge to make a judgment how to fix it.

There is a plan to fix circular dependencies this year, but major refactoring, how Nix wraps python packages, is needed.

Thank you for reporting this problem. Once I (or anybody else) tackles this problem we need many examples to prove that solution works.

[Perlence]

I don't see how libffi and openssl relate to missing "locale".

The problem comes from click package, as it tries to ensure that locales are set to UTF-8 by running locale command, which is missing.

EDIT: I initially encountered the same problem when I installed pypi2nix in a Docker container (https://github.com/LnL7/nix-docker) and tried to run it there.

[seppeljordan]

I was running into a similar problem when I wanted to deploy a click based application with numtide/nix-builder. To solve this issue I also installed <nixpkgs>.glibc and <nixpkgs>.glibcLocales. Then, when starting the container, I do something like this:

docker run \
    -e 'LC_ALL=en_US.UTF-8' \
    -e 'LANG=en_US.UTF-8' \
    -e 'LOCALE_ARCHIVE=/root/.nix-profile/lib/locale/locale-archive' \
    myapp:latest start-my-app.sh

When you build your docker image with the nix function buildDockerImage, then you would probably point LOCAL_ARCHIVE to /lib/locale/local-archive. I hope that helps.

[Perlence]

@seppeljordan Thank you very much!

[garbas]

i think this issue was solved. please reopen if i'm wrong