#!/usr/bin/python 

# This worked:
# cd temp/
# touch mboxConvertedFromJeffreyNwmicro
# mkdir ../maildir/new  # I did this, but this may not be solution to the problem I encountered.
# ls ../maildir/
#   cur new

# Usage:
# ~/dysk/scripts/Maildir2mbox.py ../maildir mboxConvertedFromJeffreyNwmicro

import mailbox
import os.path
import re
import sys

try:
    appname = os.path.split( sys.argv[0] )[1]
    basename = os.path.splitext( appname )[0]
    source = sys.argv[1]
    dest = sys.argv[2]

    # This breaks maildir2mbox into "maildir" and "mbox".
    (sfmt, dfmt) = re.match(r'^(.+)2(.+)', basename).groups()

    # Samples for the following lines are:
    #   sbox = mailbox.__dict__['Maildir']('../maildir', factory=None)
    #   dbox = mailbox.__dict__['mbox']('Inbox_mbox')

    # Avoid problematic default rfc822.Message factory, 
    # which caused this error:
    #   File "/usr/lib/python2.6/mailbox.py", line 331, 
    #       in get_message msg.set_subdir(subdir)
    #   AttributeError: Message instance has no attribute 'set_subdir'
    sbox = mailbox.__dict__[sfmt](source, factory=None)

    dbox = mailbox.__dict__[dfmt](dest)

    for key in sbox.iterkeys():
        dbox.add( sbox.get_message(key) )

except IndexError:
    sys.exit('Usage: %s source destination' % appname)
except (AttributeError, KeyError):
    sys.exit('ERROR: invalid mailbox type')
except mailbox.Error, err:
    sys.exit('ERROR: %s' % err)