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annotate lib/python3.8/site-packages/setuptools/namespaces.py @ 0:9e54283cc701 draft

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"planemo upload commit d12c32a45bcd441307e632fca6d9af7d60289d44"
author guerler
date Mon, 27 Jul 2020 03:47:31 -0400
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Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 import os
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2 from distutils import log
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3 import itertools
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4
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5 from setuptools.extern.six.moves import map
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6
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7
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8 flatten = itertools.chain.from_iterable
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9
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10
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11 class Installer:
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12
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13 nspkg_ext = '-nspkg.pth'
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14
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15 def install_namespaces(self):
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16 nsp = self._get_all_ns_packages()
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17 if not nsp:
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18 return
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19 filename, ext = os.path.splitext(self._get_target())
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20 filename += self.nspkg_ext
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21 self.outputs.append(filename)
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22 log.info("Installing %s", filename)
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23 lines = map(self._gen_nspkg_line, nsp)
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24
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25 if self.dry_run:
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26 # always generate the lines, even in dry run
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27 list(lines)
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28 return
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29
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30 with open(filename, 'wt') as f:
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31 f.writelines(lines)
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32
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33 def uninstall_namespaces(self):
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34 filename, ext = os.path.splitext(self._get_target())
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35 filename += self.nspkg_ext
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36 if not os.path.exists(filename):
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37 return
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38 log.info("Removing %s", filename)
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39 os.remove(filename)
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40
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41 def _get_target(self):
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42 return self.target
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43
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44 _nspkg_tmpl = (
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45 "import sys, types, os",
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46 "has_mfs = sys.version_info > (3, 5)",
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47 "p = os.path.join(%(root)s, *%(pth)r)",
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48 "importlib = has_mfs and __import__('importlib.util')",
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49 "has_mfs and __import__('importlib.machinery')",
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50 (
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51 "m = has_mfs and "
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52 "sys.modules.setdefault(%(pkg)r, "
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53 "importlib.util.module_from_spec("
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54 "importlib.machinery.PathFinder.find_spec(%(pkg)r, "
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55 "[os.path.dirname(p)])))"
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56 ),
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57 (
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58 "m = m or "
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59 "sys.modules.setdefault(%(pkg)r, types.ModuleType(%(pkg)r))"
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60 ),
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61 "mp = (m or []) and m.__dict__.setdefault('__path__',[])",
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62 "(p not in mp) and mp.append(p)",
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63 )
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64 "lines for the namespace installer"
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65
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66 _nspkg_tmpl_multi = (
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67 'm and setattr(sys.modules[%(parent)r], %(child)r, m)',
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68 )
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69 "additional line(s) when a parent package is indicated"
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70
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71 def _get_root(self):
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72 return "sys._getframe(1).f_locals['sitedir']"
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73
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74 def _gen_nspkg_line(self, pkg):
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75 # ensure pkg is not a unicode string under Python 2.7
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76 pkg = str(pkg)
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77 pth = tuple(pkg.split('.'))
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78 root = self._get_root()
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79 tmpl_lines = self._nspkg_tmpl
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80 parent, sep, child = pkg.rpartition('.')
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81 if parent:
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82 tmpl_lines += self._nspkg_tmpl_multi
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83 return ';'.join(tmpl_lines) % locals() + '\n'
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84
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85 def _get_all_ns_packages(self):
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86 """Return sorted list of all package namespaces"""
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87 pkgs = self.distribution.namespace_packages or []
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88 return sorted(flatten(map(self._pkg_names, pkgs)))
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89
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90 @staticmethod
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91 def _pkg_names(pkg):
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92 """
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93 Given a namespace package, yield the components of that
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94 package.
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95
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96 >>> names = Installer._pkg_names('a.b.c')
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97 >>> set(names) == set(['a', 'a.b', 'a.b.c'])
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98 True
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99 """
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100 parts = pkg.split('.')
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101 while parts:
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102 yield '.'.join(parts)
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103 parts.pop()
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104
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105
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106 class DevelopInstaller(Installer):
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107 def _get_root(self):
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108 return repr(str(self.egg_path))
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109
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110 def _get_target(self):
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111 return self.egg_link