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//proc/self/root/usr/bin/write-mime-multipart

#!/usr/bin/python
# largely taken from python examples
# http://docs.python.org/library/email-examples.html

import os
import sys

from email import encoders
from email.mime.base import MIMEBase
from email.mime.multipart import MIMEMultipart
from email.mime.text import MIMEText
from optparse import OptionParser
import gzip

COMMASPACE = ', '

starts_with_mappings = {
    '#include': 'text/x-include-url',
    '#include-once': 'text/x-include-once-url',
    '#!': 'text/x-shellscript',
    '#cloud-config': 'text/cloud-config',
    '#cloud-config-archive': 'text/cloud-config-archive',
    '#upstart-job': 'text/upstart-job',
    '#part-handler': 'text/part-handler',
    '#cloud-boothook': 'text/cloud-boothook'
}

def get_type(fname, deftype):
    f = file(fname, "rb")
    line = f.readline()
    f.close()
    rtype = deftype

# slist is sorted longest first
    slist = sorted(starts_with_mappings.keys(), key=lambda e: 0 - len(e))
    for sstr in slist:
        if line.startswith(sstr):
            rtype = starts_with_mappings[sstr]
            break
    return(rtype)

def main():
    outer = MIMEMultipart()
    #outer['Subject'] = 'Contents of directory %s' % os.path.abspath(directory)
    #outer['To'] = COMMASPACE.join(opts.recipients)
    #outer['From'] = opts.sender
    #outer.preamble = 'You will not see this in a MIME-aware mail reader.\n'

parser = OptionParser()

parser.add_option("-o", "--output", dest="output",
        help="write output to FILE [default %default]", metavar="FILE",
        default="-")
    parser.add_option("-z", "--gzip", dest="compress", action="store_true",
        help="compress output", default=False)
    parser.add_option("-d", "--default", dest="deftype",
        help="default mime type [default %default]", default="text/plain")
    parser.add_option("--delim", dest="delim",
        help="delimiter [default %default]", default=":")

(options, args) = parser.parse_args()

if (len(args)) < 1:
        parser.error("Must give file list see '--help'")

for arg in args:
        t = arg.split(options.delim, 1)
        path = t[0]
        if len(t) > 1:
            mtype = t[1]
        else:
            mtype = get_type(path, options.deftype)

maintype, subtype = mtype.split('/', 1)
        if maintype == 'text':
            fp = open(path)
            # Note: we should handle calculating the charset
            msg = MIMEText(fp.read(), _subtype=subtype)
            fp.close()
        else:
            fp = open(path, 'rb')
            msg = MIMEBase(maintype, subtype)
            msg.set_payload(fp.read())
            fp.close()
            # Encode the payload using Base64
            encoders.encode_base64(msg)

# Set the filename parameter
        msg.add_header('Content-Disposition', 'attachment',
            filename=os.path.basename(path))

outer.attach(msg)

if options.output is "-":
        ofile = sys.stdout
    else:
        ofile = file(options.output, "wb")

if options.compress:
        gfile = gzip.GzipFile(fileobj=ofile, filename=options.output)
        gfile.write(outer.as_string())
        gfile.close()
    else:
        ofile.write(outer.as_string())

ofile.close()

if __name__ == '__main__':
    main()

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