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- """pyversioncheck - Module to help with checking versions"""
- import types
- import rfc822
- import urllib
- import sys
- import string
-
- # Verbose options
- VERBOSE_SILENT=0 # Single-line reports per package
- VERBOSE_NORMAL=1 # Single-line reports per package, more info if outdated
- VERBOSE_EACHFILE=2 # Report on each URL checked
- VERBOSE_CHECKALL=3 # Check each URL for each package
-
- # Test directory
- ## urllib bug: _TESTDIR="ftp://ftp.cwi.nl/pub/jack/python/versiontestdir/"
- _TESTDIR="http://www.cwi.nl/~jack/versiontestdir/"
-
- def versioncheck(package, url, version, verbose=0):
- ok, newversion, fp = checkonly(package, url, version, verbose)
- if verbose > VERBOSE_NORMAL:
- return ok
- if ok < 0:
- print '%s: No correctly formatted current version file found'%(package)
- elif ok == 1:
- print '%s: up-to-date (version %s)'%(package, version)
- else:
- print '%s: version %s installed, version %s found:' % \
- (package, version, newversion)
- if verbose > VERBOSE_SILENT:
- while 1:
- line = fp.readline()
- if not line: break
- sys.stdout.write('\t'+line)
- return ok
-
- def checkonly(package, url, version, verbose=0):
- if verbose >= VERBOSE_EACHFILE:
- print '%s:'%package
- if type(url) == types.StringType:
- ok, newversion, fp = _check1version(package, url, version, verbose)
- else:
- for u in url:
- ok, newversion, fp = _check1version(package, u, version, verbose)
- if ok >= 0 and verbose < VERBOSE_CHECKALL:
- break
- return ok, newversion, fp
-
- def _check1version(package, url, version, verbose=0):
- if verbose >= VERBOSE_EACHFILE:
- print ' Checking %s'%url
- try:
- fp = urllib.urlopen(url)
- except IOError, arg:
- if verbose >= VERBOSE_EACHFILE:
- print ' Cannot open:', arg
- return -1, None, None
- msg = rfc822.Message(fp, seekable=0)
- newversion = msg.getheader('current-version')
- if not newversion:
- if verbose >= VERBOSE_EACHFILE:
- print ' No "Current-Version:" header in URL or URL not found'
- return -1, None, None
- version = string.strip(string.lower(version))
- newversion = string.strip(string.lower(newversion))
- if version == newversion:
- if verbose >= VERBOSE_EACHFILE:
- print ' Version identical (%s)'%newversion
- return 1, version, fp
- else:
- if verbose >= VERBOSE_EACHFILE:
- print ' Versions different (installed: %s, new: %s)'% \
- (version, newversion)
- return 0, newversion, fp
-
-
- def _test():
- print '--- TEST VERBOSE=1'
- print '--- Testing existing and identical version file'
- versioncheck('VersionTestPackage', _TESTDIR+'Version10.txt', '1.0', verbose=1)
- print '--- Testing existing package with new version'
- versioncheck('VersionTestPackage', _TESTDIR+'Version11.txt', '1.0', verbose=1)
- print '--- Testing package with non-existing version file'
- versioncheck('VersionTestPackage', _TESTDIR+'nonexistent.txt', '1.0', verbose=1)
- print '--- Test package with 2 locations, first non-existing second ok'
- versfiles = [_TESTDIR+'nonexistent.txt', _TESTDIR+'Version10.txt']
- versioncheck('VersionTestPackage', versfiles, '1.0', verbose=1)
- print '--- TEST VERBOSE=2'
- print '--- Testing existing and identical version file'
- versioncheck('VersionTestPackage', _TESTDIR+'Version10.txt', '1.0', verbose=2)
- print '--- Testing existing package with new version'
- versioncheck('VersionTestPackage', _TESTDIR+'Version11.txt', '1.0', verbose=2)
- print '--- Testing package with non-existing version file'
- versioncheck('VersionTestPackage', _TESTDIR+'nonexistent.txt', '1.0', verbose=2)
- print '--- Test package with 2 locations, first non-existing second ok'
- versfiles = [_TESTDIR+'nonexistent.txt', _TESTDIR+'Version10.txt']
- versioncheck('VersionTestPackage', versfiles, '1.0', verbose=2)
-
- if __name__ == '__main__':
- _test()
-
-
-