diff options
| -rwxr-xr-x | Lib/platform.py | 31 |
1 files changed, 30 insertions, 1 deletions
diff --git a/Lib/platform.py b/Lib/platform.py index a7785a2..f7e24d7 100755 --- a/Lib/platform.py +++ b/Lib/platform.py @@ -132,6 +132,35 @@ except AttributeError: # Standard Unix uses /dev/null DEV_NULL = '/dev/null' +# Helper for comparing two version number strings. +# Based on the description of the PHP's version_compare(): +# http://php.net/manual/en/function.version-compare.php + +_ver_stages = { + # any string not found in this dict, will get 0 assigned + 'dev': 10, + 'alpha': 20, 'a': 20, + 'beta': 30, 'b': 30, + 'c': 40, + 'RC': 50, 'rc': 50, + # number, will get 100 assigned + 'pl': 200, 'p': 200, +} + +_component_re = re.compile(r'([0-9]+|[._+-])') + +def _comparable_version(version): + result = [] + for v in _component_re.split(version): + if v not in '._+-': + try: + v = int(v, 10) + t = 100 + except ValueError: + t = _ver_stages.get(v, 0) + result.extend((t, v)) + return result + ### Platform specific APIs _libc_search = re.compile(b'(__libc_init)' @@ -155,7 +184,7 @@ def libc_ver(executable=sys.executable, lib='', version='', chunksize=16384): The file is read and scanned in chunks of chunksize bytes. """ - from distutils.version import LooseVersion as V + V = _comparable_version if hasattr(os.path, 'realpath'): # Python 2.2 introduced os.path.realpath(); it is used # here to work around problems with Cygwin not being |