Sybren A. Stüvel
5039a33053
Making the blender_cloud.pillar and blender_cloud.cache modules usable without Blender required some moving of the code, from __init__.py to blender.py. CacheControl requires the lockfile package, which increases the number of bundled wheel files to 3. Those are now managed by blender_cloud.wheels.load_wheels(). The wheels are only loaded if the Python installation doesn't yet contain the required packages. This allows development with virtualenv-installed packages, debugging in the IDE, etc.
42 lines
1.2 KiB
Python
42 lines
1.2 KiB
Python
"""External dependencies loader."""
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import glob
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import os.path
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import sys
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import logging
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my_dir = os.path.join(os.path.dirname(__file__))
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log = logging.getLogger(__name__)
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def load_wheel(module_name, fname_prefix):
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"""Loads a wheel from 'fname_prefix*.whl', unless the named module can be imported.
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This allows us to use system-installed packages before falling back to the shipped wheels.
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This is useful for development, less so for deployment.
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"""
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try:
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module = __import__(module_name)
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except ImportError:
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pass
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else:
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log.debug('Was able to load %s from %s, no need to load wheel %s',
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module_name, module.__file__, fname_prefix)
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return
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path_pattern = os.path.join(my_dir, '%s*.whl' % fname_prefix)
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wheels = glob.glob(path_pattern)
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if not wheels:
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raise RuntimeError('Unable to find wheel at %r' % path_pattern)
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sys.path.append(wheels[0])
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module = __import__(module_name)
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log.debug('Loaded %s from %s', module_name, module.__file__)
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def load_wheels():
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load_wheel('lockfile', 'lockfile')
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load_wheel('cachecontrol', 'CacheControl')
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load_wheel('pillarsdk', 'pillar_sdk')
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