mirror of
https://github.com/python/cpython.git
synced 2025-07-25 12:14:38 +00:00
05f842bae2
requires and provides. requires is a sequence of strings, of the form 'packagename-version'. The dependency checking so far merely does an '__import__(packagename)' and checks for packagename.__version__ You can also leave off the version, and any version of the package will be installed. There's a special case for the package 'python' - sys.version_info is used, so requires= ( 'python-2.3', ) just works. Provides is of the same format as requires - but if it's not supplied, a provides is generated by adding the version to each entry in packages, or modules if packages isn't there. Provides is currently only used in the PKG-INFO file. Shortly, PyPI will grow the ability to accept these lines, and register will be updated to send them. There's a new command 'checkdep' command that runs these checks. For this version, only greater-than-or-equal checking is done. We'll add the ability to specify an optional operator later.
70 lines
1.9 KiB
Python
70 lines
1.9 KiB
Python
"""distutils.command.x
|
|
|
|
Implements the Distutils 'x' command.
|
|
"""
|
|
|
|
# created 2000/mm/dd, John Doe
|
|
|
|
__revision__ = "$Id$"
|
|
|
|
from distutils.core import Command
|
|
|
|
class DependencyFailure(Exception): pass
|
|
|
|
class VersionTooOld(DependencyFailure): pass
|
|
|
|
class VersionNotKnown(DependencyFailure): pass
|
|
|
|
class checkdep (Command):
|
|
|
|
# Brief (40-50 characters) description of the command
|
|
description = "check package dependencies"
|
|
|
|
# List of option tuples: long name, short name (None if no short
|
|
# name), and help string.
|
|
# Later on, we might have auto-fetch and the like here. Feel free.
|
|
user_options = []
|
|
|
|
def initialize_options (self):
|
|
self.debug = None
|
|
|
|
# initialize_options()
|
|
|
|
|
|
def finalize_options (self):
|
|
pass
|
|
# finalize_options()
|
|
|
|
|
|
def run (self):
|
|
from distutils.version import LooseVersion
|
|
failed = []
|
|
for pkg, ver in self.distribution.metadata.requires:
|
|
if pkg == 'python':
|
|
if ver is not None:
|
|
# Special case the 'python' package
|
|
import sys
|
|
thisver = LooseVersion('%d.%d.%d'%sys.version_info[:3])
|
|
if thisver < ver:
|
|
failed.append(((pkg,ver), VersionTooOld(thisver)))
|
|
continue
|
|
# Kinda hacky - we should do more here
|
|
try:
|
|
mod = __import__(pkg)
|
|
except Exception, e:
|
|
failed.append(((pkg,ver), e))
|
|
continue
|
|
if ver is not None:
|
|
if hasattr(mod, '__version__'):
|
|
thisver = LooseVersion(mod.__version__)
|
|
if thisver < ver:
|
|
failed.append(((pkg,ver), VersionTooOld(thisver)))
|
|
else:
|
|
failed.append(((pkg,ver), VersionNotKnown()))
|
|
|
|
if failed:
|
|
raise DependencyFailure, failed
|
|
|
|
# run()
|
|
|
|
# class x
|