import os
import subprocess
import tempfile

def tmpbuffer(editor=None, contents=None):
    """open an editor and retreive the resulting editted buffer"""
    if not editor:
        editor = os.environ['EDITOR']
    assert editor
    fd, tmpfile = tempfile.mkstemp(suffix='.txt')
    if contents:
        os.write(fd, contents)
    os.close(fd)
    cmdline = editor.split()
    cmdline.append(tmpfile)
    edit = subprocess.call(cmdline)
    buffer = file(tmpfile).read().strip()
    os.remove(tmpfile)
    return buffer

def match(string):
    """return bug # in the string or None if not found"""
    string = string.lower()

    index = string.find('bug')
    if index == -1:
        return
    index += len('bug')
    if string[index+1] in ('-', ' ', '+', '_', '=',):
        index += 1
    start = index
    raise NotImplementedError