Mercurial > repos > guerler > hhblits
comparison lib/python3.8/site-packages/pkg_resources/extern/__init__.py @ 0:9e54283cc701 draft
"planemo upload commit d12c32a45bcd441307e632fca6d9af7d60289d44"
| author | guerler |
|---|---|
| date | Mon, 27 Jul 2020 03:47:31 -0400 |
| parents | |
| children |
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| -1:000000000000 | 0:9e54283cc701 |
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| 1 import sys | |
| 2 | |
| 3 | |
| 4 class VendorImporter: | |
| 5 """ | |
| 6 A PEP 302 meta path importer for finding optionally-vendored | |
| 7 or otherwise naturally-installed packages from root_name. | |
| 8 """ | |
| 9 | |
| 10 def __init__(self, root_name, vendored_names=(), vendor_pkg=None): | |
| 11 self.root_name = root_name | |
| 12 self.vendored_names = set(vendored_names) | |
| 13 self.vendor_pkg = vendor_pkg or root_name.replace('extern', '_vendor') | |
| 14 | |
| 15 @property | |
| 16 def search_path(self): | |
| 17 """ | |
| 18 Search first the vendor package then as a natural package. | |
| 19 """ | |
| 20 yield self.vendor_pkg + '.' | |
| 21 yield '' | |
| 22 | |
| 23 def find_module(self, fullname, path=None): | |
| 24 """ | |
| 25 Return self when fullname starts with root_name and the | |
| 26 target module is one vendored through this importer. | |
| 27 """ | |
| 28 root, base, target = fullname.partition(self.root_name + '.') | |
| 29 if root: | |
| 30 return | |
| 31 if not any(map(target.startswith, self.vendored_names)): | |
| 32 return | |
| 33 return self | |
| 34 | |
| 35 def load_module(self, fullname): | |
| 36 """ | |
| 37 Iterate over the search path to locate and load fullname. | |
| 38 """ | |
| 39 root, base, target = fullname.partition(self.root_name + '.') | |
| 40 for prefix in self.search_path: | |
| 41 try: | |
| 42 extant = prefix + target | |
| 43 __import__(extant) | |
| 44 mod = sys.modules[extant] | |
| 45 sys.modules[fullname] = mod | |
| 46 return mod | |
| 47 except ImportError: | |
| 48 pass | |
| 49 else: | |
| 50 raise ImportError( | |
| 51 "The '{target}' package is required; " | |
| 52 "normally this is bundled with this package so if you get " | |
| 53 "this warning, consult the packager of your " | |
| 54 "distribution.".format(**locals()) | |
| 55 ) | |
| 56 | |
| 57 def install(self): | |
| 58 """ | |
| 59 Install this importer into sys.meta_path if not already present. | |
| 60 """ | |
| 61 if self not in sys.meta_path: | |
| 62 sys.meta_path.append(self) | |
| 63 | |
| 64 | |
| 65 names = 'packaging', 'pyparsing', 'six', 'appdirs' | |
| 66 VendorImporter(__name__, names).install() |