From: zooko Date: Thu, 8 Nov 2007 14:41:16 +0000 (+0530) Subject: zfec: setup: use my version of ez_setup.py X-Git-Url: https://git.rkrishnan.org/pf/content/en/seg/biz/about.html?a=commitdiff_plain;h=f7c6fc33954a478c80bb2e85e0f1588b711f37ac;p=tahoe-lafs%2Fzfec.git zfec: setup: use my version of ez_setup.py darcs-hash:244257f0cf10f16a6c22b23816bde215d2fc8dcb --- diff --git a/zfec/ez_setup.py b/zfec/ez_setup.py index 69a6f1e..02b9caa 100755 --- a/zfec/ez_setup.py +++ b/zfec/ez_setup.py @@ -13,7 +13,7 @@ the appropriate options to ``use_setuptools()``. This file can also be run as a script to install or upgrade setuptools. """ -import sys +import os, sys DEFAULT_VERSION = "0.6c7" DEFAULT_URL = "http://pypi.python.org/packages/%s/s/setuptools/" % sys.version[:3] @@ -23,8 +23,6 @@ md5_data = { 'setuptools-0.6c7-py2.5.egg': '45d2ad28f9750e7434111fde831e8372', } -import sys, os - def _validate_md5(egg_name, data): if egg_name in md5_data: from md5 import md5 @@ -37,28 +35,43 @@ def _validate_md5(egg_name, data): sys.exit(2) return data -def setuptools_is_loaded(): - return 'pkg_resources' in sys.modules or 'setuptools' in sys.modules - -def get_setuptools_version(): - sub = subprocess.Popen([sys.executable, "-c", "import setuptools;print setuptools.__version__"], stdout=subprocess.PIPE) - return sub.stdout.read().strip() +# The following code to parse versions is copied from pkg_resources.py so that +# we can parse versions without importing that module. +import re +component_re = re.compile(r'(\d+ | [a-z]+ | \.| -)', re.VERBOSE) +replace = {'pre':'c', 'preview':'c','-':'final-','rc':'c','dev':'@'}.get + +def _parse_version_parts(s): + for part in component_re.split(s): + part = replace(part,part) + if not part or part=='.': + continue + if part[:1] in '0123456789': + yield part.zfill(8) # pad for numeric comparison + else: + yield '*'+part + + yield '*final' # ensure that alpha/beta/candidate are before final + +def parse_version(s): + parts = [] + for part in _parse_version_parts(s.lower()): + if part.startswith('*'): + if part<'*final': # remove '-' before a prerelease tag + while parts and parts[-1]=='*final-': parts.pop() + # remove trailing zeros from each series of numeric parts + while parts and parts[-1]=='00000000': + parts.pop() + parts.append(part) + return tuple(parts) def setuptools_is_new_enough(required_version): """Return True if setuptools is already installed and has a version number >= required_version.""" - verstr = get_setuptools_version() - try: - import pkg_resources - except ImportError: - # Well then I guess it is definitely not new enough. - return False - try: - ver = pkg_resources.parse_version(verstr) - newenough = ver and ver >= pkg_resources.parse_version(required_version) - finally: - del sys.modules['pkg_resources'] - return newenough + (cin, cout, cerr,) = os.popen3("%s -c \"import setuptools;print setuptools.__version__\"" % (sys.executable,)) + verstr = cout.read().strip() + ver = parse_version(verstr) + return ver and ver >= parse_version(required_version) def use_setuptools( version=DEFAULT_VERSION, download_base=DEFAULT_URL, to_dir=os.curdir, @@ -77,22 +90,10 @@ def use_setuptools( """ if min_version is None: min_version = version - if setuptools_is_loaded(): - # setuptools is installed, but can't be upgraded, so just version - # check (using pkg_resources) and exit if it's not a good enough - # version. - if not setuptools_is_new_enough(min_version): - print >>sys.stderr, ( - "The required version of setuptools (>=%s) is not installed, and\n" - "can't be installed while this script is running. Please install\n" - "a more recent version first.\n\n(Currently using %r)" - ) % (min_version, get_setuptools_version()) - sys.exit(2) - else: - if not setuptools_is_new_enough(min_version): - egg = download_setuptools(version, download_base, to_dir, download_delay) - sys.path.insert(0, egg) - import setuptools; setuptools.bootstrap_install_from = egg + if not setuptools_is_new_enough(min_version): + egg = download_setuptools(version, download_base, to_dir, download_delay) + sys.path.insert(0, egg) + import setuptools; setuptools.bootstrap_install_from = egg def download_setuptools( version=DEFAULT_VERSION, download_base=DEFAULT_URL, to_dir=os.curdir, @@ -144,35 +145,23 @@ and place it in this directory before rerunning this script.) def main(argv, version=DEFAULT_VERSION): """Install or upgrade setuptools and EasyInstall""" - if setuptools_is_loaded(): - # setuptools is installed, but can't be upgraded, so just version - # check (using pkg_resources) and exit if it's not a good enough - # version. - if not setuptools_is_new_enough(version): - print >>sys.stderr, ( - "The required version of setuptools (>=%s) is not installed, and\n" - "can't be installed while this script is running. Please install\n" - "a more recent version first.\n\n(Currently using %r)" - ) % (version, get_setuptools_version()) - sys.exit(2) - else: - if setuptools_is_new_enough(version): - if argv: - from setuptools.command.easy_install import main - main(argv) - else: - print "Setuptools version",version,"or greater has been installed." - print '(Run "ez_setup.py -U setuptools" to reinstall or upgrade.)' + if setuptools_is_new_enough(version): + if argv: + from setuptools.command.easy_install import main + main(argv) else: - egg = None - try: - egg = download_setuptools(version, delay=0) - sys.path.insert(0,egg) - from setuptools.command.easy_install import main - return main(list(argv)+[egg]) # we're done here - finally: - if egg and os.path.exists(egg): - os.unlink(egg) + print "Setuptools version",version,"or greater has been installed." + print '(Run "ez_setup.py -U setuptools" to reinstall or upgrade.)' + else: + egg = None + try: + egg = download_setuptools(version, delay=0) + sys.path.insert(0,egg) + from setuptools.command.easy_install import main + return main(list(argv)+[egg]) # we're done here + finally: + if egg and os.path.exists(egg): + os.unlink(egg) def update_md5(filenames): """Update our built-in md5 registry"""