Nushell activation script results in broken prompt

[dpatterbee]

Issue

The Nushell activation script no longer handles prompts correctly due to the split of closures and blocks in 0.72.

virtualenv/src/virtualenv/activation/nushell/activate.nu

Line 95 in beb7d66

if ($old_prompt_command | describe) == 'block' {

This lines checks for type block, but many/(most?) prompts will now be of type closure, causing them to render as <Closure X> rather than actually running the prompt function.

eg.

(venv) <Closure 11>〉

I don't have the expertise to know whether switching that check to "closure" is the correct fix or not so I'm just leaving this bug report rather than opening a PR. Editing that line in my activate.nu does work as a temporary fix though.

Environment

Provide at least:

• OS: macos 13.1
• pip list of the host python where virtualenv is installed:

asdf
Package      Version
------------ -------
distlib      0.3.6
filelock     3.8.0
pip          22.3.1
platformdirs 2.5.4
setuptools   65.6.3
virtualenv   20.17.1
wheel        0.38.4

Output of the virtual environment creation

This isn't an issue with creation so I'm not including this.

[gaborbernat]

cc @kubouch

[kubouch]

Good catch! Yes, changing it to closure should fix it.