Invalid version: '' error in bioconda-utils autobump

[sroener]

Hi,

I installed bioconda-utils with the following command:

mamba create -n bioconda -c conda-forge -c bioconda bioconda-utils

Everything seemed fine (linitng worked without problems), but when trying to update a package with autobump (bioconda-utils autobump recipes/ config.yml --packages bioconductor-bsgenome.hsapiens.ucsc.hg38) I get the following error.

16:18:41 BIOCONDA ERROR Dropping into debugger
Traceback (most recent call last):
  File "/home/user/anaconda3/envs/bioconda/lib/python3.7/site-packages/bioconda_utils/cli.py", line 73, in wrapper
    func(*args, **kwargs)
  File "<boltons.funcutils.FunctionBuilder-19>", line 5, in autobump
  File "/home/user/anaconda3/envs/bioconda/lib/python3.7/site-packages/bioconda_utils/cli.py", line 92, in wrapper
    func(*args, **kwargs)
  File "/home/user/anaconda3/envs/bioconda/lib/python3.7/site-packages/bioconda_utils/cli.py", line 881, in autobump
    from . import autobump
  File "/home/user/anaconda3/envs/bioconda/lib/python3.7/site-packages/bioconda_utils/autobump.py", line 84, in <module>
    LegacyVersion = parse_version("").__class__  # pylint: disable=invalid-name
  File "/home/user/anaconda3/envs/bioconda/lib/python3.7/site-packages/pkg_resources/_vendor/packaging/version.py", line 197, in __init__
    raise InvalidVersion(f"Invalid version: '{version}'")
pkg_resources.extern.packaging.version.InvalidVersion: Invalid version: ''
Traceback (most recent call last):
  File "/home/user/anaconda3/envs/bioconda/bin/bioconda-utils", line 10, in <module>
    sys.exit(main())
  File "/home/user/anaconda3/envs/bioconda/lib/python3.7/site-packages/bioconda_utils/cli.py", line 1017, in main
    handle_merged_pr,
  File "/home/user/anaconda3/envs/bioconda/lib/python3.7/site-packages/argh/dispatching.py", line 328, in dispatch_commands
    dispatch(parser, *args, **kwargs)
  File "/home/user/anaconda3/envs/bioconda/lib/python3.7/site-packages/argh/dispatching.py", line 174, in dispatch
    for line in lines:
  File "/home/user/anaconda3/envs/bioconda/lib/python3.7/site-packages/argh/dispatching.py", line 277, in _execute_command
    for line in result:
  File "/home/user/anaconda3/envs/bioconda/lib/python3.7/site-packages/argh/dispatching.py", line 260, in _call
    result = function(*positional, **keywords)
  File "<boltons.funcutils.FunctionBuilder-22>", line 5, in autobump
  File "/home/user/anaconda3/envs/bioconda/lib/python3.7/site-packages/bioconda_utils/cli.py", line 132, in wrapper
    func(*args, **kwargs)
  File "<boltons.funcutils.FunctionBuilder-21>", line 5, in autobump
  File "/home/user/anaconda3/envs/bioconda/lib/python3.7/site-packages/bioconda_utils/cli.py", line 61, in wrapper
    func(*args, **kwargs)
  File "<boltons.funcutils.FunctionBuilder-20>", line 5, in autobump
  File "/home/user/anaconda3/envs/bioconda/lib/python3.7/site-packages/bioconda_utils/cli.py", line 73, in wrapper
    func(*args, **kwargs)
  File "<boltons.funcutils.FunctionBuilder-19>", line 5, in autobump
  File "/home/user/anaconda3/envs/bioconda/lib/python3.7/site-packages/bioconda_utils/cli.py", line 92, in wrapper
    func(*args, **kwargs)
  File "/home/user/anaconda3/envs/bioconda/lib/python3.7/site-packages/bioconda_utils/cli.py", line 881, in autobump
    from . import autobump
  File "/home/user/anaconda3/envs/bioconda/lib/python3.7/site-packages/bioconda_utils/autobump.py", line 84, in <module>
    LegacyVersion = parse_version("").__class__  # pylint: disable=invalid-name
  File "/home/user/anaconda3/envs/bioconda/lib/python3.7/site-packages/pkg_resources/_vendor/packaging/version.py", line 197, in __init__
    raise InvalidVersion(f"Invalid version: '{version}'")
pkg_resources.extern.packaging.version.InvalidVersion: Invalid version: ''