micromamba remove --no-prune is still pruning some files of dependencies

[francesco-ballarin]

Hi,
I am a new user of mamba, and I am trying it out as a temporary workaround for Kaggle/docker-python#1227.

I would like to use mamba to remove a few selected packages (which I am sure I am not using in my application) from an upstream docker image to decrease its disk occupation, yet making minimal changes to the overall environment. Reading the documentation, I thought that the command I was looking for was micromamba remove --no-prune. Still, it seems to remove some files of the dependencies (e.g. METADATA) as well.

Please see below for a reproducible example.

$ docker run -it gcr.io/kaggle-images/python:v129 /bin/bash
root@9a83ee93adc7:/# wget -qO- https://micro.mamba.pm/api/micromamba/linux-64/latest | tar -C ${CONDA_PREFIX} -xvj bin/micromamba
bin/micromamba
root@9a83ee93adc7:/# ls /opt/conda/lib/python3.7/site-packages/zipp-3.11.0.dist-info/
INSTALLER  LICENSE  METADATA  RECORD  REQUESTED  WHEEL  direct_url.json  top_level.txt
root@9a83ee93adc7:/# micromamba remove --yes --no-prune dlenv-tf-2-11-cpu

                                           __
          __  ______ ___  ____ _____ ___  / /_  ____ _
         / / / / __ `__ \/ __ `/ __ `__ \/ __ \/ __ `/
        / /_/ / / / / / / /_/ / / / / / / /_/ / /_/ /
       / .___/_/ /_/ /_/\__,_/_/ /_/ /_/_.___/\__,_/
      /_/

Transaction

  Prefix: /opt/conda

  Removing specs:

   - dlenv-tf-2-11-cpu


  Package                   Version  Build           Channel        Size
──────────────────────────────────────────────────────────────────────────
  Remove:
──────────────────────────────────────────────────────────────────────────

  - dlenv-tf-2-11-cpu  1.0.20230123  py37h8ed1108_0  /tmp/conda      1GB

  Summary:

  Remove: 1 packages

  Total download: 0 B

──────────────────────────────────────────────────────────────────────────



Transaction starting
Unlinking dlenv-tf-2-11-cpu-1.0.20230123-py37h8ed1108_0
Transaction finished
root@9a83ee93adc7:/# ls /opt/conda/lib/python3.7/site-packages/zipp-3.11.0.dist-info/
REQUESTED  direct_url.json

Should I be providing additional command line options?
Thanks!

[francesco-ballarin]

After all, I do not believe this is a bug in micromamba itself, but rather in how the dlenv-tf-* package is produced. If this is not the case, feel free to reopen.