Error on conda dependencies made noarch

As conda is responsible for performing the transformational magic of installing noarch: python packages, it is very risky to make conda’s dependencies noarch: python and should be avoided. In this effort, it would be very helpful if the linter errored any time one of conda’s dependencies is converted into a noarch: python package.

[CJ-Wright]

xref: https://github.com/regro/cf-scripts/issues/264

[mbargull]

conda search conda --info --json \| jq .conda[-1].depends

depending on the versions you want to take into account, you might want

$ conda search conda --info --json | jq '.conda | [ .[] | .depends | .[] | split(" ")[0] ] | unique'                                                                                                                                                                             
[
  "conda-env",
  "enum34",
  "futures",
  "pycosat",
  "pyopenssl",
  "python",
  "pyyaml",
  "requests",
  "ruamel_yaml"
]
$ conda search conda --info --json | jq '.conda | [ .[] | select([.version | split(".") | .[] | tonumber] | .[0] >=4 and .[1] >=3) | .depends | .[] | split(" ")[0] ] | unique'                                                                                                  
[
  "conda-env",
  "enum34",
  "futures",
  "pycosat",
  "pyopenssl",
  "python",
  "requests",
  "ruamel_yaml"
]

Is there a way to get that from Python?

Yes, even easier, e.g.,

from itertools import chain
from conda.exports import MatchSpec, get_index

m = MatchSpec('conda')
deps_list = [r.depends for r in get_index().values() if m.match(r)]
deps = set(MatchSpec(dep).name for dep in chain.from_iterable(deps_list))
# deps == {'python', 'pyyaml', 'enum34', 'ruamel_yaml', 'pycosat', 'conda-env', 'futures', 'requests', 'pyopenssl'}

You can then tell get_index which platforms and channels to consider and fine-tune the MatchSpec if you only want to look at newer version of conda.