alot attach keys

config

[bindings]
    [[envelope]]
        G = call hooks.attach_my_key(ui)
        'G G' = call hooks.attach_recipient_keys(ui)

hooks.py

import subprocess

from alot.settings.const import settings
from email.utils import parseaddr
from twisted.internet import defer


def attach_my_key(ui):
    """
    Attach the senders openpgp public key
    """
    frm = ui.current_buffer.envelope.get('From', "")
    address = parseaddr(frm)[1]
    acc = settings.get_account_by_address(address)
    fpr = acc.gpg_key.fpr
    return attach_key(ui, fpr, address)


def attach_recipient_keys(ui):
    """
    Attach the openpgp public keys of all the recipients of the email
    """
    to = ui.current_buffer.envelope.get('To', "")
    cc = ui.current_buffer.envelope.get('Cc', "")
    deferreds = []
    for recipient in to.split(',')+cc.split(','):
        address = parseaddr(recipient)[1]
        if address:
            deferreds.append(attach_key(ui, address))

    return defer.gatherResults(deferreds)


def attach_key(ui, id, name=None):
    """
    Export and attach openpgp key
    """
    if not name:
        name = id

    path = "/tmp/%s.asc" % name
    subprocess.call('gpg -a --export ' + id + ' > ' + path, shell=True)
    return ui.apply_commandline('attach ' + path)