Adding Jack Jansen's version checking utility.

1 files changed, 101 insertions, 0 deletions

diff --git a/Tools/versioncheck/pyversioncheck.py b/Tools/versioncheck/pyversioncheck.py
new file mode 100644
index 0000000..074e917
--- /dev/null
+++ b/Tools/versioncheck/pyversioncheck.py
@@ -0,0 +1,101 @@
+"""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+VERBOSE_NORMAL=1	# Single-line reports per package, more info if outdated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()
+	
+