purge packages since pkgutil can't

pkgpurge.py

#!/usr/bin/python
import subprocess
import plistlib
import os.path
import errno

def check_output(cmd, *a, **kw):
    proc = subprocess.Popen(cmd, *a, **kw)
    stdout, stderr = proc.communicate()
    if proc.returncode:
        raise subprocess.CalledProcessError(proc.returncode, cmd, stderr)
    return stdout, stderr

def soft_delete(path):
    try:
        try:
            os.remove(path)
        except OSError, e:
            if e.errno != errno.EPERM:
                raise
            os.rmdir(path)
    except OSError, e:
        if e.errno != errno.ENOENT:
            raise

def main(pkg):
    print 'purging %r' % (pkg,)
    info_string, _ = check_output(['pkgutil', '--pkg-info-plist', pkg], stdout=subprocess.PIPE)
    info = plistlib.readPlistFromString(info_string)
    base_path = os.path.join(info['volume'], info['install-location'])
    file_paths, _ = check_output(['pkgutil', '--files', pkg], stdout=subprocess.PIPE)
    for file_path in reversed(file_paths.splitlines()):
        full_path = os.path.join(base_path, file_path)
        print 'removing %r' % (full_path,)
        soft_delete(full_path)
    subprocess.check_call(['pkgutil', '--forget', pkg])

import sys
for pkg in sys.argv[1:]:
    main(pkg)