56 lines
1.6 KiB
Python
56 lines
1.6 KiB
Python
"""
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The migration module includes migration logic to update database scheme and/or
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data for the user database.
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To create a migration, simply create a file upgrade<migration number>.py and
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define an upgrade() function with the logic. Please note that there must be as
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many upgrade files as there are database versions (version 5 would include
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upgrade files 1-5)
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"""
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import pkgutil
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import re
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updates = {}
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appVersion = 0
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prefix = __name__ + "."
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# load modules to work based with and without pyinstaller
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# from: https://github.com/webcomics/dosage/blob/master/dosagelib/loader.py
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# see: https://github.com/pyinstaller/pyinstaller/issues/1905
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# load modules using iter_modules()
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# (should find all filters in normal build, but not pyinstaller)
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module_names = [m[1] for m in pkgutil.iter_modules(__path__, prefix)]
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print ("module names from iter_modules: ", module_names)
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# special handling for PyInstaller
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importers = map(pkgutil.get_importer, __path__)
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toc = set()
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for i in importers:
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if hasattr(i, 'toc'):
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toc |= i.toc
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for elm in toc:
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if elm.startswith(prefix):
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module_names.append(elm)
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print("module names after get_importer toc: ", module_names)
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for modname in module_names:
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print(modname)
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# loop through python files, extracting update number and function, and
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# adding it to a list
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modname_tail = modname.rsplit('.', 1)[-1]
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module = __import__(modname, fromlist=True)
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m = re.match("^upgrade(?P<index>\d+)$", modname_tail)
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if not m:
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continue
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index = int(m.group("index"))
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appVersion = max(appVersion, index)
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upgrade = getattr(module, "upgrade", False)
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if upgrade:
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updates[index] = upgrade
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