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Batching migrations

The idea here is that if you know which migrations were in version 2.0.3 of your project and which were in version 2.0.4 then setA - setB gives you the list of migrations you need to undo.

Django migrations give you a directed acyclic graph which describes how to get from the current database state to the target state. But there is no mechanism by which you can perform tasks like revert all the migrations that just ran in the last deployment.

Here is a quick recipe for batching Django migrations to allow you to do things like that.

Before you tag your project you do:

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if [ -f "${HOME}/.gpg-agent-info" ]; then
     . "${HOME}/.gpg-agent-info"
       export GPG_AGENT_INFO
       export SSH_AUTH_SOCK
       export SSH_AGENT_PID
fi

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from __future__ import print_function, division

from decimal import Decimal
import argparse
import datetime
import getpass
import sys

from dateutil.parser import parse
from dateutil.relativedelta import relativedelta

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import os
import subprocess
import sys
import requests
from pip.index import PackageFinder

p = PackageFinder([], ["https://pypi.python.org/simple"], session=requests.Session())
versions = p._find_all_versions("newrelic")
versions = sorted(
    versions,

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import subprocess

tags = [
    subprocess.check_output(["git", "rev-list", "--max-parents=0", "HEAD"]).strip()
]
tags.extend(
    subprocess.check_output(["git", "tag", "-l"]).split(),
)

added = {}

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Backend

I used the alexandra python package. See https://pypi.python.org/pypi/alexandra. It abstracts away dealing with HTTP or Lambda and you just use decorators to map Alexa intents to python functions. Here is my test.py:

import alexandra

app = alexandra.Application()
name_map = {}

@app.launch

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This is a quick demo of using twisted enpoints with cowrie to be able to use systemd socket activation. This has been tested on a fresh install of Ubuntu 16.04.2:

Welcome to Ubuntu 16.04.2 LTS (GNU/Linux 4.4.0-62-generic x86_64)

 * Documentation:  https://help.ubuntu.com
 * Management:     https://landscape.canonical.com
 * Support:        https://ubuntu.com/advantage

Last login: Tue May 2 23:47:09 2017

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#
# Copyright 2019 aiohomekit team
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#    http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software

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#
# Copyright 2019 aiohomekit team
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#    http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software

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# In your Dockerfile:
# COPY geoip.rb /usr/share/logstash/vendor/bundle/jruby/2.5.0/gems/logstash-filter-geoip-6.0.3-java/lib/logstash/filters/geoip.rb

# encoding: utf-8
require "logstash/filters/base"
require "logstash/namespace"

require "logstash-filter-geoip_jars"

# The GeoIP filter adds information about the geographical location of IP addresses,