$ cat >> wixxml.py << EOF

  > import os, subprocess, sys

  > import xml.etree.ElementTree as ET

  > 

  > # MSYS mangles the path if it expands $TESTDIR

  > testdir = os.environ['TESTDIR']

  > ns = {'wix' : 'http://schemas.microsoft.com/wix/2006/wi'}

  > 

  > def directory(node, relpath):

  >     '''generator of files in the xml node, rooted at relpath'''

  >     dirs = node.findall('./wix:Directory', ns)

  > 

  >     for d in dirs:

  >         for subfile in directory(d, relpath + d.attrib['Name'] + '/'):

  >             yield subfile

  > 

  >     files = node.findall('./wix:Component/wix:File', ns)

  > 

  >     for f in files:

  >         yield relpath + f.attrib['Name']

  > 

  > def hgdirectory(relpath):

  >     '''generator of tracked files, rooted at relpath'''

  >     hgdir = "%s/../mercurial" % (testdir)

  >     args = ['hg', '--cwd', hgdir, 'files', '--rev', '.', relpath]

  >     proc = subprocess.Popen(args, stdout=subprocess.PIPE,

  >                             stderr=subprocess.PIPE)

  >     output = proc.communicate()[0]

  > 

  >     slash = '/'

  >     for line in output.splitlines():

  >         if os.name == 'nt':

  >             yield line.replace(os.sep, slash)

  >         else:

  >             yield line

  > 

  > tracked = [f for f in hgdirectory(sys.argv[1])]

  > 

  > xml = ET.parse("%s/../contrib/wix/%s.wxs" % (testdir, sys.argv[1]))

  > root = xml.getroot()

  > dir = root.find('.//wix:DirectoryRef', ns)

  > 

  > installed = [f for f in directory(dir, '')]

  > 

  > print('Not installed:')

  > for f in sorted(set(tracked) - set(installed)):

  >     print('  %s' % f)

  > 

  > print('Not tracked:')

  > for f in sorted(set(installed) - set(tracked)):

  >     print('  %s' % f)

  > EOF

  $ python wixxml.py help

  Not installed:

    help/common.txt

    help/hg.1.txt

    help/hgignore.5.txt

    help/hgrc.5.txt

    help/internals/bundles.txt

    help/internals/changegroups.txt

  Not tracked:

  $ python wixxml.py templates

  Not installed:

    templates/map-cmdline.status

  Not tracked: