[setuptools] Dependency requires extra command

Hello,

My Python module has an external dependency on python-apsw.

Unfortunately, python-apsw cannot be compiled with just "python setup.py
build", but it needs an additional 'fetch --sqlite' command, i.e. the
compilation command line is

  python setup.py fetch --sqlite build

  
Is there a way to tell setuptools how to properly build apsw?


Best,

   -Nikolaus

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 »Time flies like an arrow, fruit flies like a Banana.«

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