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python-rpm-generators/SOURCES/pythondistdeps.py

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#!/usr/bin/python3 -s
# -*- coding: utf-8 -*-
#
# Copyright 2010 Per Øyvind Karlsen <proyvind@moondrake.org>
# Copyright 2015 Neal Gompa <ngompa13@gmail.com>
# Copyright 2020 SUSE LLC
#
# This program is free software. It may be redistributed and/or modified under
# the terms of the LGPL version 2.1 (or later).
#
# RPM python dependency generator, using .egg-info/.egg-link/.dist-info data
#
from __future__ import print_function
import argparse
from os.path import dirname, sep
import re
from sys import argv, stdin, stderr, version_info
from sysconfig import get_path
from warnings import warn
from packaging.requirements import Requirement as Requirement_
from packaging.version import parse
import packaging.markers
# Monkey patching packaging.markers to handle extras names in a
# case-insensitive manner:
# pip considers dnspython[DNSSEC] and dnspython[dnssec] to be equal, but
# packaging markers treat extras in a case-sensitive manner. To solve this
# issue, we introduce a comparison operator that compares case-insensitively
# if both sides of the comparison are strings. And then we inject this
# operator into packaging.markers to be used when comparing names of extras.
# Fedora BZ: https://bugzilla.redhat.com/show_bug.cgi?id=1936875
# Upstream issue: https://discuss.python.org/t/what-extras-names-are-treated-as-equal-and-why/7614
# - After it's established upstream what is the canonical form of an extras
# name, we plan to open an issue with packaging to hopefully solve this
# there without having to resort to monkeypatching.
def str_lower_eq(a, b):
if isinstance(a, str) and isinstance(b, str):
return a.lower() == b.lower()
else:
return a == b
packaging.markers._operators["=="] = str_lower_eq
try:
from importlib.metadata import PathDistribution
except ImportError:
from importlib_metadata import PathDistribution
try:
from pathlib import Path
except ImportError:
from pathlib2 import Path
def normalize_name(name):
"""https://www.python.org/dev/peps/pep-0503/#normalized-names"""
return re.sub(r'[-_.]+', '-', name).lower()
def legacy_normalize_name(name):
"""Like pkg_resources Distribution.key property"""
return re.sub(r'[-_]+', '-', name).lower()
class Requirement(Requirement_):
def __init__(self, requirement_string):
super(Requirement, self).__init__(requirement_string)
self.normalized_name = normalize_name(self.name)
self.legacy_normalized_name = legacy_normalize_name(self.name)
class Distribution(PathDistribution):
def __init__(self, path):
super(Distribution, self).__init__(Path(path))
# Check that the initialization went well and metadata are not missing or corrupted
# name is the most important attribute, if it doesn't exist, import failed
if not self.name or not isinstance(self.name, str):
print("*** PYTHON_METADATA_FAILED_TO_PARSE_ERROR___SEE_STDERR ***")
print('Error: Python metadata at `{}` are missing or corrupted.'.format(path), file=stderr)
exit(65) # os.EX_DATAERR
self.normalized_name = normalize_name(self.name)
self.legacy_normalized_name = legacy_normalize_name(self.name)
self.requirements = [Requirement(r) for r in self.requires or []]
self.extras = [
v.lower() for k, v in self.metadata.items() if k == 'Provides-Extra']
self.py_version = self._parse_py_version(path)
# `name` is defined as a property exactly like this in Python 3.10 in the
# PathDistribution class. Due to that we can't redefine `name` as a normal
# attribute. So we copied the Python 3.10 definition here into the code so
# that it works also on previous Python/importlib_metadata versions.
@property
def name(self):
"""Return the 'Name' metadata for the distribution package or None."""
return self.metadata.get('Name')
def _parse_py_version(self, path):
# Try to parse the Python version from the path the metadata
# resides at (e.g. /usr/lib/pythonX.Y/site-packages/...)
res = re.search(r"/python(?P<pyver>\d+\.\d+)/", path)
if res:
return res.group('pyver')
# If that hasn't worked, attempt to parse it from the metadata
# directory name
res = re.search(r"-py(?P<pyver>\d+.\d+)[.-]egg-info$", path)
if res:
return res.group('pyver')
return None
def requirements_for_extra(self, extra):
extra_deps = []
# we are only interested in dependencies with extra == 'our_extra' marker
for req in self.requirements:
# no marker at all, nothing to evaluate
if not req.marker:
continue
# does the marker include extra == 'our_extra'?
# we can only evaluate the marker as a whole,
# so we evaluate it twice (using 2 different marker_envs)
# and see if it only evaluates to True with our extra
if (req.marker.evaluate(get_marker_env(self, extra)) and
not req.marker.evaluate(get_marker_env(self, None))):
extra_deps.append(req)
return extra_deps
def __repr__(self):
return '{} from {}'.format(self.name, self._path)
class RpmVersion():
def __init__(self, version_id):
version = parse(version_id)
if isinstance(version._version, str):
self.version = version._version
else:
self.epoch = version._version.epoch
self.version = list(version._version.release)
self.pre = version._version.pre
self.dev = version._version.dev
self.post = version._version.post
# version.local is ignored as it is not expected to appear
# in public releases
# https://www.python.org/dev/peps/pep-0440/#local-version-identifiers
def is_legacy(self):
return isinstance(self.version, str)
def increment(self):
self.version[-1] += 1
self.pre = None
self.dev = None
self.post = None
return self
def is_zero(self):
return self.__str__() == '0'
def __str__(self):
if self.is_legacy():
return self.version
if self.epoch:
rpm_epoch = str(self.epoch) + ':'
else:
rpm_epoch = ''
while len(self.version) > 1 and self.version[-1] == 0:
self.version.pop()
rpm_version = '.'.join(str(x) for x in self.version)
if self.pre:
rpm_suffix = '~{}'.format(''.join(str(x) for x in self.pre))
elif self.dev:
rpm_suffix = '~~{}'.format(''.join(str(x) for x in self.dev))
elif self.post:
rpm_suffix = '^post{}'.format(self.post[1])
else:
rpm_suffix = ''
return '{}{}{}'.format(rpm_epoch, rpm_version, rpm_suffix)
def convert_compatible(name, operator, version_id):
if version_id.endswith('.*'):
print("*** INVALID_REQUIREMENT_ERROR___SEE_STDERR ***")
print('Invalid requirement: {} {} {}'.format(name, operator, version_id), file=stderr)
exit(65) # os.EX_DATAERR
version = RpmVersion(version_id)
if version.is_legacy():
# LegacyVersions are not supported in this context
print("*** INVALID_REQUIREMENT_ERROR___SEE_STDERR ***")
print('Invalid requirement: {} {} {}'.format(name, operator, version_id), file=stderr)
exit(65) # os.EX_DATAERR
if len(version.version) == 1:
print("*** INVALID_REQUIREMENT_ERROR___SEE_STDERR ***")
print('Invalid requirement: {} {} {}'.format(name, operator, version_id), file=stderr)
exit(65) # os.EX_DATAERR
upper_version = RpmVersion(version_id)
upper_version.version.pop()
upper_version.increment()
return '({} >= {} with {} < {})'.format(
name, version, name, upper_version)
def convert_equal(name, operator, version_id):
if version_id.endswith('.*'):
version_id = version_id[:-2] + '.0'
return convert_compatible(name, '~=', version_id)
version = RpmVersion(version_id)
return '{} = {}'.format(name, version)
def convert_arbitrary_equal(name, operator, version_id):
if version_id.endswith('.*'):
print("*** INVALID_REQUIREMENT_ERROR___SEE_STDERR ***")
print('Invalid requirement: {} {} {}'.format(name, operator, version_id), file=stderr)
exit(65) # os.EX_DATAERR
version = RpmVersion(version_id)
return '{} = {}'.format(name, version)
def convert_not_equal(name, operator, version_id):
if version_id.endswith('.*'):
version_id = version_id[:-2]
version = RpmVersion(version_id)
if version.is_legacy():
# LegacyVersions are not supported in this context
print("*** INVALID_REQUIREMENT_ERROR___SEE_STDERR ***")
print('Invalid requirement: {} {} {}'.format(name, operator, version_id), file=stderr)
exit(65) # os.EX_DATAERR
version_gt = RpmVersion(version_id).increment()
version_gt_operator = '>='
# Prevent dev and pre-releases from satisfying a < requirement
version = '{}~~'.format(version)
else:
version = RpmVersion(version_id)
version_gt = version
version_gt_operator = '>'
return '({} < {} or {} {} {})'.format(
name, version, name, version_gt_operator, version_gt)
def convert_ordered(name, operator, version_id):
if version_id.endswith('.*'):
# PEP 440 does not define semantics for prefix matching
# with ordered comparisons
# see: https://github.com/pypa/packaging/issues/320
# and: https://github.com/pypa/packaging/issues/321
# This style of specifier is officially "unsupported",
# even though it is processed. Support may be removed
# in version 21.0.
version_id = version_id[:-2]
version = RpmVersion(version_id)
if operator == '>':
# distutils will allow a prefix match with '>'
operator = '>='
if operator == '<=':
# distutils will not allow a prefix match with '<='
operator = '<'
else:
version = RpmVersion(version_id)
# For backwards compatibility, fallback to previous behavior with LegacyVersions
if not version.is_legacy():
# Prevent dev and pre-releases from satisfying a < requirement
if operator == '<' and not version.pre and not version.dev and not version.post:
version = '{}~~'.format(version)
# Prevent post-releases from satisfying a > requirement
if operator == '>' and not version.pre and not version.dev and not version.post:
version = '{}.0'.format(version)
return '{} {} {}'.format(name, operator, version)
OPERATORS = {'~=': convert_compatible,
'==': convert_equal,
'===': convert_arbitrary_equal,
'!=': convert_not_equal,
'<=': convert_ordered,
'<': convert_ordered,
'>=': convert_ordered,
'>': convert_ordered}
def convert(name, operator, version_id):
try:
return OPERATORS[operator](name, operator, version_id)
except Exception as exc:
raise RuntimeError("Cannot process Python package version `{}` for name `{}`".
format(version_id, name)) from exc
def get_marker_env(dist, extra):
# packaging uses a default environment using
# platform.python_version to evaluate if a dependency is relevant
# based on environment markers [1],
# e.g. requirement `argparse;python_version<"2.7"`
#
# Since we're running this script on one Python version while
# possibly evaluating packages for different versions, we
# set up an environment with the version we want to evaluate.
#
# [1] https://www.python.org/dev/peps/pep-0508/#environment-markers
return {"python_full_version": dist.py_version,
"python_version": dist.py_version,
"extra": extra}
def main():
"""To allow this script to be importable (and its classes/functions
reused), actions are defined in the main function and are performed only
when run as a main script."""
parser = argparse.ArgumentParser(prog=argv[0])
group = parser.add_mutually_exclusive_group(required=True)
group.add_argument('-P', '--provides', action='store_true', help='Print Provides')
group.add_argument('-R', '--requires', action='store_true', help='Print Requires')
group.add_argument('-r', '--recommends', action='store_true', help='Print Recommends')
group.add_argument('-C', '--conflicts', action='store_true', help='Print Conflicts')
group.add_argument('-E', '--extras', action='store_true', help='[Unused] Generate spec file snippets for extras subpackages')
group_majorver = parser.add_mutually_exclusive_group()
group_majorver.add_argument('-M', '--majorver-provides', action='store_true', help='Print extra Provides with Python major version only')
group_majorver.add_argument('--majorver-provides-versions', action='append',
help='Print extra Provides with Python major version only for listed '
'Python VERSIONS (appended or comma separated without spaces, e.g. 2.7,3.9)')
parser.add_argument('-m', '--majorver-only', action='store_true', help='Print Provides/Requires with Python major version only')
parser.add_argument('-n', '--normalized-names-format', action='store',
default="legacy-dots", choices=["pep503", "legacy-dots"],
help='Format of normalized names according to pep503 or legacy format that allows dots [default]')
parser.add_argument('--normalized-names-provide-both', action='store_true',
help='Provide both `pep503` and `legacy-dots` format of normalized names (useful for a transition period)')
parser.add_argument('-L', '--legacy-provides', action='store_true', help='Print extra legacy pythonegg Provides')
parser.add_argument('-l', '--legacy', action='store_true', help='Print legacy pythonegg Provides/Requires instead')
parser.add_argument('--console-scripts-nodep-setuptools-since', action='store',
help='An optional Python version (X.Y), at least 3.8. '
'For that version and any newer version, '
'a dependency on "setuptools" WILL NOT be generated for packages with console_scripts/gui_scripts entry points. '
'By setting this flag, you guarantee that setuptools >= 47.2.0 is used '
'during the build of packages for this and any newer Python version.')
parser.add_argument('--require-extras-subpackages', action='store_true',
help="If there is a dependency on a package with extras functionality, require the extras subpackage")
parser.add_argument('--package-name', action='store', help="Name of the RPM package that's being inspected. Required for extras requires/provides to work.")
parser.add_argument('--namespace', action='store', help="Namespace for the printed Requires, Provides, Recommends and Conflicts")
parser.add_argument('--fail-if-zero', action='store_true', help='Fail the script if the automatically generated Provides version was 0, which usually indicates a packaging error.')
parser.add_argument('files', nargs=argparse.REMAINDER, help="Files from the RPM package that are to be inspected, can also be supplied on stdin")
args = parser.parse_args()
if args.fail_if_zero and not args.provides:
raise parser.error('--fail-if-zero only works with --provides')
py_abi = args.requires
py_deps = {}
if args.majorver_provides_versions:
# Go through the arguments (can be specified multiple times),
# and parse individual versions (can be comma-separated)
args.majorver_provides_versions = [v for vstring in args.majorver_provides_versions
for v in vstring.split(",")]
# If normalized_names_require_pep503 is True we require the pep503
# normalized name, if it is False we provide the legacy normalized name
normalized_names_require_pep503 = args.normalized_names_format == "pep503"
# If normalized_names_provide_pep503/legacy is True we provide the
# pep503/legacy normalized name, if it is False we don't
normalized_names_provide_pep503 = \
args.normalized_names_format == "pep503" or args.normalized_names_provide_both
normalized_names_provide_legacy = \
args.normalized_names_format == "legacy-dots" or args.normalized_names_provide_both
# At least one type of normalization must be provided
assert normalized_names_provide_pep503 or normalized_names_provide_legacy
if args.console_scripts_nodep_setuptools_since:
nodep_setuptools_pyversion = parse(args.console_scripts_nodep_setuptools_since)
if nodep_setuptools_pyversion < parse("3.8"):
print("Only version 3.8+ is supported in --console-scripts-nodep-setuptools-since", file=stderr)
print("*** PYTHON_EXTRAS_ARGUMENT_ERROR___SEE_STDERR ***")
exit(65) # os.EX_DATAERR
else:
nodep_setuptools_pyversion = None
# Is this script being run for an extras subpackage?
extras_subpackage = None
if args.package_name and '+' in args.package_name:
# The extras names are encoded in the package names after the + sign.
# We take the part after the rightmost +, ignoring when empty,
# this allows packages like nicotine+ or c++ to work fine.
# While packages with names like +spam or foo+bar would break,
# names started with the plus sign are not very common
# and pluses in the middle can be easily replaced with dashes.
# Python extras names don't contain pluses according to PEP 508.
package_name_parts = args.package_name.rpartition('+')
extras_subpackage = package_name_parts[2].lower() or None
namespace = (args.namespace + "({})") if args.namespace else "{}"
for f in (args.files or stdin.readlines()):
f = f.strip()
lower = f.lower()
name = 'python(abi)'
# add dependency based on path, versioned if within versioned python directory
if py_abi and (lower.endswith('.py') or lower.endswith('.pyc') or lower.endswith('.pyo')):
if name not in py_deps:
py_deps[name] = []
running_python_version = '{}.{}'.format(*version_info[:2])
purelib = get_path('purelib').split(running_python_version)[0]
platlib = get_path('platlib').split(running_python_version)[0]
for lib in (purelib, platlib):
if lib in f:
spec = ('==', f.split(lib)[1].split(sep)[0])
if spec not in py_deps[name]:
py_deps[name].append(spec)
# XXX: hack to workaround RPM internal dependency generator not passing directories
lower_dir = dirname(lower)
if lower_dir.endswith('.egg') or \
lower_dir.endswith('.egg-info') or \
lower_dir.endswith('.dist-info'):
lower = lower_dir
f = dirname(f)
# Determine provide, requires, conflicts & recommends based on egg/dist metadata
if lower.endswith('.egg') or \
lower.endswith('.egg-info') or \
lower.endswith('.dist-info'):
dist = Distribution(f)
if not dist.py_version:
warn("Version for {!r} has not been found".format(dist), RuntimeWarning)
continue
# If processing an extras subpackage:
# Check that the extras name is declared in the metadata, or
# that there are some dependencies associated with the extras
# name in the requires.txt (this is an outdated way to declare
# extras packages).
# - If there is an extras package declared only in requires.txt
# without any dependencies, this check will fail. In that case
# make sure to use updated metadata and declare the extras
# package there.
if extras_subpackage and extras_subpackage not in dist.extras and not dist.requirements_for_extra(extras_subpackage):
print("*** PYTHON_EXTRAS_NOT_FOUND_ERROR___SEE_STDERR ***")
print(f"\nError: The package name contains an extras name `{extras_subpackage}` that was not found in the metadata.\n"
"Check if the extras were removed from the project. If so, consider removing the subpackage and obsoleting it from another.\n", file=stderr)
exit(65) # os.EX_DATAERR
if args.majorver_provides or args.majorver_provides_versions or \
args.majorver_only or args.legacy_provides or args.legacy:
# Get the Python major version
pyver_major = dist.py_version.split('.')[0]
if args.provides:
extras_suffix = f"[{extras_subpackage}]" if extras_subpackage else ""
# If egg/dist metadata says package name is python, we provide python(abi)
if dist.normalized_name == 'python':
name = namespace.format('python(abi)')
if name not in py_deps:
py_deps[name] = []
py_deps[name].append(('==', dist.py_version))
if not args.legacy or not args.majorver_only:
if normalized_names_provide_legacy:
name = namespace.format('python{}dist({}{})').format(dist.py_version, dist.legacy_normalized_name, extras_suffix)
if name not in py_deps:
py_deps[name] = []
if normalized_names_provide_pep503:
name_ = namespace.format('python{}dist({}{})').format(dist.py_version, dist.normalized_name, extras_suffix)
if name_ not in py_deps:
py_deps[name_] = []
if args.majorver_provides or args.majorver_only or \
(args.majorver_provides_versions and dist.py_version in args.majorver_provides_versions):
if normalized_names_provide_legacy:
pymajor_name = namespace.format('python{}dist({}{})').format(pyver_major, dist.legacy_normalized_name, extras_suffix)
if pymajor_name not in py_deps:
py_deps[pymajor_name] = []
if normalized_names_provide_pep503:
pymajor_name_ = namespace.format('python{}dist({}{})').format(pyver_major, dist.normalized_name, extras_suffix)
if pymajor_name_ not in py_deps:
py_deps[pymajor_name_] = []
if args.legacy or args.legacy_provides:
legacy_name = namespace.format('pythonegg({})({})').format(pyver_major, dist.legacy_normalized_name)
if legacy_name not in py_deps:
py_deps[legacy_name] = []
if dist.version:
version = dist.version
spec = ('==', version)
if args.fail_if_zero:
if RpmVersion(version).is_zero():
print('*** PYTHON_PROVIDED_VERSION_NORMALIZES_TO_ZERO___SEE_STDERR ***')
print(f'\nError: The version in the Python package metadata {version} normalizes to zero.\n'
'It\'s likely a packaging error caused by missing version information\n'
'(e.g. when using a version control system snapshot as a source).\n'
'Try providing the version information manually when building the Python package,\n'
'for example by setting the SETUPTOOLS_SCM_PRETEND_VERSION environment variable if the package uses setuptools_scm.\n'
'If you are confident that the version of the Python package is intentionally zero,\n'
'you may %define the _python_dist_allow_version_zero macro in the spec file to disable this check.\n', file=stderr)
exit(65) # os.EX_DATAERR
if normalized_names_provide_legacy:
if spec not in py_deps[name]:
py_deps[name].append(spec)
if args.majorver_provides or \
(args.majorver_provides_versions and dist.py_version in args.majorver_provides_versions):
py_deps[pymajor_name].append(spec)
if normalized_names_provide_pep503:
if spec not in py_deps[name_]:
py_deps[name_].append(spec)
if args.majorver_provides or \
(args.majorver_provides_versions and dist.py_version in args.majorver_provides_versions):
py_deps[pymajor_name_].append(spec)
if args.legacy or args.legacy_provides:
if spec not in py_deps[legacy_name]:
py_deps[legacy_name].append(spec)
if args.requires or (args.recommends and dist.extras):
name = namespace.format('python(abi)')
# If egg/dist metadata says package name is python, we don't add dependency on python(abi)
if dist.normalized_name == 'python':
py_abi = False
if name in py_deps:
py_deps.pop(name)
elif py_abi and dist.py_version:
if name not in py_deps:
py_deps[name] = []
spec = ('==', dist.py_version)
if spec not in py_deps[name]:
py_deps[name].append(spec)
if extras_subpackage:
deps = [d for d in dist.requirements_for_extra(extras_subpackage)]
else:
deps = dist.requirements
# console_scripts/gui_scripts entry points needed pkg_resources from setuptools
# on new Python/setuptools versions, this is no longer required
if nodep_setuptools_pyversion is None or parse(dist.py_version) < nodep_setuptools_pyversion:
if (dist.entry_points and
(lower.endswith('.egg') or
lower.endswith('.egg-info'))):
groups = {ep.group for ep in dist.entry_points}
if {"console_scripts", "gui_scripts"} & groups:
# stick them first so any more specific requirement
# overrides it
deps.insert(0, Requirement('setuptools'))
# add requires/recommends based on egg/dist metadata
for dep in deps:
# Even if we're requiring `foo[bar]`, also require `foo`
# to be safe, and to make it discoverable through
# `repoquery --whatrequires`
extras_suffixes = [""]
if args.require_extras_subpackages and dep.extras:
# A dependency can have more than one extras,
# i.e. foo[bar,baz], so let's go through all of them
extras_suffixes += [f"[{e.lower()}]" for e in dep.extras]
for extras_suffix in extras_suffixes:
if normalized_names_require_pep503:
dep_normalized_name = dep.normalized_name
else:
dep_normalized_name = dep.legacy_normalized_name
if args.legacy:
name = namespace.format('pythonegg({})({})').format(pyver_major, dep.legacy_normalized_name)
else:
if args.majorver_only:
name = namespace.format('python{}dist({}{})').format(pyver_major, dep_normalized_name, extras_suffix)
else:
name = namespace.format('python{}dist({}{})').format(dist.py_version, dep_normalized_name, extras_suffix)
if dep.marker and not args.recommends and not extras_subpackage:
if not dep.marker.evaluate(get_marker_env(dist, '')):
continue
if name not in py_deps:
py_deps[name] = []
for spec in dep.specifier:
if (spec.operator, spec.version) not in py_deps[name]:
py_deps[name].append((spec.operator, spec.version))
# Unused, for automatic sub-package generation based on 'extras' from egg/dist metadata
# TODO: implement in rpm later, or...?
if args.extras:
print(dist.extras)
for extra in dist.extras:
print('%%package\textras-{}'.format(extra))
print('Summary:\t{} extra for {} python package'.format(extra, dist.legacy_normalized_name))
print('Group:\t\tDevelopment/Python')
for dep in dist.requirements_for_extra(extra):
for spec in dep.specifier:
if spec.operator == '!=':
print('Conflicts:\t{} {} {}'.format(dep.legacy_normalized_name, '==', spec.version))
else:
print('Requires:\t{} {} {}'.format(dep.legacy_normalized_name, spec.operator, spec.version))
print('%%description\t{}'.format(extra))
print('{} extra for {} python package'.format(extra, dist.legacy_normalized_name))
print('%%files\t\textras-{}\n'.format(extra))
if args.conflicts:
# Should we really add conflicts for extras?
# Creating a meta package per extra with recommends on, which has
# the requires/conflicts in stead might be a better solution...
for dep in dist.requirements:
for spec in dep.specifier:
if spec.operator == '!=':
if dep.legacy_normalized_name not in py_deps:
py_deps[dep.legacy_normalized_name] = []
spec = ('==', spec.version)
if spec not in py_deps[dep.legacy_normalized_name]:
py_deps[dep.legacy_normalized_name].append(spec)
for name in sorted(py_deps):
if py_deps[name]:
# Print out versioned provides, requires, recommends, conflicts
spec_list = []
for spec in py_deps[name]:
spec_list.append(convert(name, spec[0], spec[1]))
if len(spec_list) == 1:
print(spec_list[0])
else:
# Sort spec_list so that the results can be tested easily
print('({})'.format(' with '.join(sorted(spec_list))))
else:
# Print out unversioned provides, requires, recommends, conflicts
print(name)
if __name__ == "__main__":
"""To allow this script to be importable (and its classes/functions
reused), actions are performed only when run as a main script."""
try:
main()
except Exception as exc:
print("*** PYTHONDISTDEPS_GENERATORS_FAILED ***", flush=True)
raise RuntimeError("Error: pythondistdeps.py generator encountered an unhandled exception and was terminated.") from exc
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