Adding Jack Jansen's version checking utility.

Tools/versioncheck/README

+This is versioncheck 1.0, a first stab at automatic checking of versions of
+Python extension packages installed on your system.
+
+The basic idea is that each package contains a _checkversion.py
+somewhere, probably at the root level of the package. In addition, each
+package maintainer makes a file available on the net, through ftp or
+http, which contains the version number of the most recent distribution
+and some readable text explaining the differences with previous
+versions, where to download the package, etc.
+
+The checkversions.py script walks through the installed Python tree (or
+through a tree of choice), and runs each _checkversion.py script. These
+scripts retrieve the current-version file over the net, compares version
+numbers and tells the user about new versions of packages available.
+
+A boilerplate for the _checkversion.py file can be found here. Replace
+package name, version and the URL of the version-check file and put it in
+your distribution. In stead of a single URL you can also specify a list
+of URLs. Each of these will be checked in order until one is available,
+this is handy for distributions that live in multiple places. Put the
+primary distribution site (the most up-to-date site) before others.
+The script is executed with execfile(), not imported, and the current
+directory is the checkversion directory, so be careful with globals,
+importing, etc.
+
+The version-check file consists of an rfc822-style header followed by
+plaintext. The only header field checked currently is
+'Current-Version:', which should contain te current version and is
+matched against the string contained in the _checkversion.py script.
+The rest of the file is human-readable text and presented to the user if
+there is a version mismatch. It should contain at the very least a URL
+of either the current distribution or a webpage describing it.
+
+Pycheckversion.py is the module that does the actual checking of versions.
+It should be fine where it is, it is imported by checkversion before anything
+else is done, but if imports fail you may want to move it to somewhere
+along sys.path.
+
+	Jack Jansen, CWI, 23-Dec-97.
+	<jack@cwi.nl>
+	

Tools/versioncheck/_checkversion.py

+"""This file (which is sourced, not imported) checks the version of the
+"versioncheck" package. It is also an example of how to format your own
+_checkversion.py file"""
+
+import pyversioncheck
+
+_PACKAGE="versioncheck"
+_VERSION="1.0"
+_URL="http://www.cwi.nl/~jack/versioncheck/curversion.txt"
+
+try:
+	_myverbose=VERBOSE
+except NameError:
+	_myverbose=1
+	
+pyversioncheck.versioncheck(_PACKAGE, _URL, _VERSION, verbose=_myverbose)

Tools/versioncheck/checkversions.py

+"""Checkversions - recursively search a directory (default: sys.prefix) 
+for _checkversion.py files, and run each of them. This will tell you of
+new versions available for any packages you have installed."""
+
+import os
+import getopt
+import sys
+import pyversioncheck
+
+CHECKNAME="_checkversion.py"
+
+VERBOSE=1
+
+USAGE="""Usage: checkversions [-v verboselevel] [dir ...]
+Recursively examine a tree (default: sys.prefix) and for each package
+with a _checkversion.py file compare the installed version against the current
+version.
+
+Values for verboselevel:
+0 - Minimal output, one line per package
+1 - Also print descriptions for outdated packages (default)
+2 - Print information on each URL checked
+3 - Check every URL for packages with multiple locations"""
+
+def check1dir(dummy, dir, files):
+	if CHECKNAME in files:
+		fullname = os.path.join(dir, CHECKNAME)
+		try:
+			execfile(fullname)
+		except:
+			print '** Exception in', fullname
+			
+def walk1tree(tree):
+	os.path.walk(tree, check1dir, None)
+	
+def main():
+	global VERBOSE
+	try:
+		options, arguments = getopt.getopt(sys.argv[1:], 'v:')
+	except getopt.error:
+		print USAGE
+		sys.exit(1)
+	for o, a in options:
+		if o == '-v':
+			VERBOSE = string.atoi(a)
+	if not arguments:
+		arguments = [sys.prefix]
+	for dir in arguments:
+		walk1tree(dir)
+		
+if __name__ == '__main__':
+	main()
+		
+	

Tools/versioncheck/pyversioncheck.py

+"""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()
+	
+