fetch_repodata_remote_request raises RepodataOnDisk exception

[mcg1969]

Checklist

• I added a descriptive title
• I searched open reports and couldn't find a duplicate

What happened?

The fetch_repodata_remote_request was deprecated in 23.9, and is scheduled for removal in conda 24.3. Unfortunately, it it seems that it is now broken:

>>> from conda.core.subdir_data import fetch_repodata_remote_request
>>> fetch_repodata_remote_request('https://repo.anaconda.com/pkgs/main/linux-64', None, None)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/Users/mgrant/miniconda3/lib/python3.11/site-packages/conda/deprecations.py", line 71, in inner
    return func(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^
  File "/Users/mgrant/miniconda3/lib/python3.11/site-packages/conda/core/subdir_data.py", line 560, in fetch_repodata_remote_request
    raw_repodata_str = subdir._repo.repodata(cache_state)  # type: ignore
                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/mgrant/miniconda3/lib/python3.11/site-packages/conda/gateways/repodata/jlap/interface.py", line 54, in repodata
    self.repodata_parsed(state)
  File "/Users/mgrant/miniconda3/lib/python3.11/site-packages/conda/gateways/repodata/jlap/interface.py", line 121, in repodata_parsed
    raise RepodataOnDisk()
conda.gateways.repodata.RepodataOnDisk

Conda Info

active environment : base
    active env location : /Users/mgrant/miniconda3
            shell level : 1
       user config file : /Users/mgrant/.condarc
 populated config files : /Users/mgrant/.condarc
          conda version : 24.1.1
    conda-build version : 3.28.3
         python version : 3.11.7.final.0
                 solver : libmamba (default)
       virtual packages : __archspec=1=m1
                          __conda=24.1.1=0
                          __osx=14.3=0
                          __unix=0=0
       base environment : /Users/mgrant/miniconda3  (writable)
      conda av data dir : /Users/mgrant/miniconda3/etc/conda
  conda av metadata url : None
           channel URLs : https://repo.anaconda.com/pkgs/main/osx-arm64
                          https://repo.anaconda.com/pkgs/main/noarch
                          https://repo.anaconda.com/pkgs/r/osx-arm64
                          https://repo.anaconda.com/pkgs/r/noarch
          package cache : /Users/mgrant/miniconda3/pkgs
                          /Users/mgrant/.conda/pkgs
       envs directories : /Users/mgrant/miniconda3/envs
                          /Users/mgrant/.conda/envs
               platform : osx-arm64
             user-agent : conda/24.1.1 requests/2.31.0 CPython/3.11.7 Darwin/23.3.0 OSX/14.3 solver/libmamba conda-libmamba-solver/23.12.0 libmambapy/1.5.6 aau/0.4.3
                UID:GID : 502:20
             netrc file : None
           offline mode : False

Conda Config

==> /Users/mgrant/.condarc <==
anaconda_anon_usage: True

Conda list

No response

Additional Context

No response

[jezdez]

Thanks for the report @mcg1969! This seems to be a regression introduced while JLAP has been integrated into the repodata interfaces.

@dholth Seems like repodata isn't returning the cached repodata string at all? Let's prepare this for a patch release.

[dholth]

This should also be avoidable by setting --no-repodata-use-zst. We can override that setting as part of a patched fetch_repodata_remote_request.

[mcg1969]

While working on the patch, I'd appreciate if we can clarify the deprecation commentary better to describe more fully how to replace fetch_repodata_remote_request. The comments point to the class conda.core.subdir_data.SubdirData, but provide no further guidance on what methods to call. Then again, if the fixed fetch_repodata_remote_request is cleanly implemented that will be its own documentation!

[dholth]

subdir = SubdirData(Channel(url), repodata_fn=repodata_fn)
fetcher = subdir.repo_fetch
repodata, state = fetcher.fetch_latest_parsed()

[kenodegard]

Fixed in #13596, to be included in conda 24.1.2 patch release