Mercurial > repos > guerler > hhblits
annotate lib/python3.8/site-packages/pip/_internal/operations/check.py @ 0:9e54283cc701 draft
"planemo upload commit d12c32a45bcd441307e632fca6d9af7d60289d44"
author | guerler |
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date | Mon, 27 Jul 2020 03:47:31 -0400 |
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1 """Validation of dependencies of packages |
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2 """ |
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3 |
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4 # The following comment should be removed at some point in the future. |
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5 # mypy: strict-optional=False |
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6 # mypy: disallow-untyped-defs=False |
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7 |
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8 import logging |
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9 from collections import namedtuple |
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10 |
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11 from pip._vendor.packaging.utils import canonicalize_name |
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12 from pip._vendor.pkg_resources import RequirementParseError |
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13 |
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14 from pip._internal.distributions import ( |
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15 make_distribution_for_install_requirement, |
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16 ) |
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17 from pip._internal.utils.misc import get_installed_distributions |
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18 from pip._internal.utils.typing import MYPY_CHECK_RUNNING |
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19 |
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20 logger = logging.getLogger(__name__) |
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21 |
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22 if MYPY_CHECK_RUNNING: |
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23 from pip._internal.req.req_install import InstallRequirement |
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24 from typing import ( |
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25 Any, Callable, Dict, Optional, Set, Tuple, List |
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26 ) |
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27 |
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28 # Shorthands |
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29 PackageSet = Dict[str, 'PackageDetails'] |
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30 Missing = Tuple[str, Any] |
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31 Conflicting = Tuple[str, str, Any] |
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32 |
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33 MissingDict = Dict[str, List[Missing]] |
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34 ConflictingDict = Dict[str, List[Conflicting]] |
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35 CheckResult = Tuple[MissingDict, ConflictingDict] |
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36 |
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37 PackageDetails = namedtuple('PackageDetails', ['version', 'requires']) |
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38 |
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39 |
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40 def create_package_set_from_installed(**kwargs): |
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41 # type: (**Any) -> Tuple[PackageSet, bool] |
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42 """Converts a list of distributions into a PackageSet. |
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43 """ |
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44 # Default to using all packages installed on the system |
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45 if kwargs == {}: |
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46 kwargs = {"local_only": False, "skip": ()} |
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47 |
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48 package_set = {} |
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49 problems = False |
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50 for dist in get_installed_distributions(**kwargs): |
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51 name = canonicalize_name(dist.project_name) |
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52 try: |
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53 package_set[name] = PackageDetails(dist.version, dist.requires()) |
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54 except RequirementParseError as e: |
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55 # Don't crash on broken metadata |
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56 logger.warning("Error parsing requirements for %s: %s", name, e) |
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57 problems = True |
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58 return package_set, problems |
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59 |
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60 |
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61 def check_package_set(package_set, should_ignore=None): |
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62 # type: (PackageSet, Optional[Callable[[str], bool]]) -> CheckResult |
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63 """Check if a package set is consistent |
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64 |
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65 If should_ignore is passed, it should be a callable that takes a |
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66 package name and returns a boolean. |
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67 """ |
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68 if should_ignore is None: |
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69 def should_ignore(name): |
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70 return False |
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71 |
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72 missing = {} |
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73 conflicting = {} |
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74 |
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75 for package_name in package_set: |
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76 # Info about dependencies of package_name |
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77 missing_deps = set() # type: Set[Missing] |
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78 conflicting_deps = set() # type: Set[Conflicting] |
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79 |
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80 if should_ignore(package_name): |
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81 continue |
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82 |
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83 for req in package_set[package_name].requires: |
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84 name = canonicalize_name(req.project_name) # type: str |
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85 |
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86 # Check if it's missing |
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87 if name not in package_set: |
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88 missed = True |
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89 if req.marker is not None: |
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90 missed = req.marker.evaluate() |
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91 if missed: |
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92 missing_deps.add((name, req)) |
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93 continue |
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94 |
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95 # Check if there's a conflict |
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96 version = package_set[name].version # type: str |
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97 if not req.specifier.contains(version, prereleases=True): |
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98 conflicting_deps.add((name, version, req)) |
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99 |
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100 if missing_deps: |
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101 missing[package_name] = sorted(missing_deps, key=str) |
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102 if conflicting_deps: |
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103 conflicting[package_name] = sorted(conflicting_deps, key=str) |
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104 |
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105 return missing, conflicting |
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106 |
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107 |
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108 def check_install_conflicts(to_install): |
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109 # type: (List[InstallRequirement]) -> Tuple[PackageSet, CheckResult] |
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110 """For checking if the dependency graph would be consistent after \ |
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111 installing given requirements |
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112 """ |
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113 # Start from the current state |
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114 package_set, _ = create_package_set_from_installed() |
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115 # Install packages |
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116 would_be_installed = _simulate_installation_of(to_install, package_set) |
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117 |
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118 # Only warn about directly-dependent packages; create a whitelist of them |
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119 whitelist = _create_whitelist(would_be_installed, package_set) |
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120 |
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121 return ( |
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122 package_set, |
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123 check_package_set( |
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124 package_set, should_ignore=lambda name: name not in whitelist |
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125 ) |
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126 ) |
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127 |
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128 |
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129 def _simulate_installation_of(to_install, package_set): |
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130 # type: (List[InstallRequirement], PackageSet) -> Set[str] |
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131 """Computes the version of packages after installing to_install. |
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132 """ |
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133 |
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134 # Keep track of packages that were installed |
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135 installed = set() |
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136 |
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137 # Modify it as installing requirement_set would (assuming no errors) |
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138 for inst_req in to_install: |
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139 abstract_dist = make_distribution_for_install_requirement(inst_req) |
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140 dist = abstract_dist.get_pkg_resources_distribution() |
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141 |
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142 name = canonicalize_name(dist.key) |
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143 package_set[name] = PackageDetails(dist.version, dist.requires()) |
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144 |
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145 installed.add(name) |
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146 |
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147 return installed |
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148 |
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149 |
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150 def _create_whitelist(would_be_installed, package_set): |
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151 # type: (Set[str], PackageSet) -> Set[str] |
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152 packages_affected = set(would_be_installed) |
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153 |
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154 for package_name in package_set: |
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155 if package_name in packages_affected: |
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156 continue |
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157 |
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158 for req in package_set[package_name].requires: |
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159 if canonicalize_name(req.name) in packages_affected: |
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160 packages_affected.add(package_name) |
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161 break |
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162 |
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163 return packages_affected |