jtsaito

Code Minecraft with Python on Mac OSX

Here's a step-by-step to get started scripting Minecraft with Python on Mac OSX

jtsaito

Using Python w/ Minecraft on Ubuntu

These instructions should work on any Ubuntu-based OS, but have only been tested on GalliumOS.

Install required packages

Copy and paste the following line into a terminal and press enter to install all the dependencies (you might already have some installed):

sudo apt update
sudo apt install python-software-properties python3 python3-pip idle3 git
sudo apt install openjdk-8-jre-headless openjdk-8-jdk maven

jtsaito

Exmaple handler given a DynamoDB table your-table with hash key uuid.

const AWS = require('aws-sdk');
AWS.config.update({region: 'eu-west-1'});
const dynamo = new AWS.DynamoDB.DocumentClient({apiVersion: '2012-08-10'});

exports.handler = async (event) => {
    //console.log('Received event:::', JSON.stringify(event));
 

jtsaito

#!/bin/bash

# This script downsizes video files from 1080 to 720 resolution using ffmpeg.
# It expects input files in ./movies and an output dir ./720.

transcode ()
{
file=$1
indir=$2
outdir=$3

jtsaito

jsaito@jahns-mbp > ~/projects/go/src/github.com/hashicorp/terraform > GITHUB_TOKEN=<REMOVED> GITHUB_ORGANIZATION=Bassetfroggs GITHUB_TEST_USER=servicejts GITHUB_TEST_COLLABORATOR=jsaito make testacc TEST=./builtin/providers/github
==> Checking that code complies with gofmt requirements...
go generate $(go list ./... | grep -v /terraform/vendor/)
2017/03/02 11:56:57 Generated command/internal_plugin_list.go
TF_ACC=1 go test ./builtin/providers/github -v  -timeout 120m
=== RUN   TestProvider
--- PASS: TestProvider (0.00s)
=== RUN   TestProvider_impl
--- PASS: TestProvider_impl (0.00s)

jtsaito

On terraform planning to update the (we removed some json content and marked it <REMOVED>:

Path: terraform.tfplan
~ aws_opsworks_rails_app_layer.bookshelf-app
    custom_json: "<REMOVED>"

~ aws_inspector_assessment_target.inspector
    resource_group_arn: "arn:aws:inspector:eu-west-1:390571511014:resourcegroup/0-PQ6fNHHt" => "${aws_inspector_resource_group.inspector.arn}"

jtsaito

Setting up a Docker Registry with Let's Encrypt TLS support

This gist describes how to set up a private Docker Registry on an AWS EC2 instance and how to secure it with TLS using a certificate by Let's Encrypt.

A Docker registry is a server side application that stores and lets you distribute Docker images. It runs in an own Docker container and the image is freely available. Let's Encrypt is a Certificate Authority that gives away TLS certificates for free.

0. Prerequisites

We require the following three items to be set up correctly before we start.

jtsaito

AWS Lambda allows uploading from S3. The S3 object can be specified in the console. There is bug when the Lambda and the S3 bug are both in AWS region eu-central-1.

The S3 console gives the following resource url: https://s3.eu-central-1.amazonaws.com/xzy/lambda_function.zip. Inputing the url raises an error by the Lambda GUI.

The usual S3 endpoint domain is s3-{region-name}.amazonaws.com (documentation). The problem is that eu-central-1 region is deviating from this scheme, allowing s3.eu-central-1.amazonaws.com (note the dot)). This endpoint is given in by the console. Copy-and-pasting it reveals the incorrect validation in the Lambda GUI.

jtsaito

Day 1

• So there is pyenv. It seems to be the same as rbenv. Noone seems to be using it.
• There is nothing like bundler. I'm going with pip install -r requirements.txt. This is like a mixture of a Gemfile and a Gemfile.lock but the actual libraries seem to be is stored globally. I am disappointed.
• Testing. The standard choice here seems to be either pytest or the built in unit test. Neither of them seems to be BDD. Since Python does not have Ruby's blocks for writing DSLs everything looks really ugly compared to RSpec.

Day 2

• Ruby: array.length vs Python len(list). Why do I have to call a globally defined function? Because the OO is done well?
• In Ruby I can use inject with a block. Again, there are some functions in Python for filter, map and reduce. The reduce function was moved out of the standard library and into the functools library. Here is an example inject Ruby vs Python:

array.inject(0) { |result, element| result * element }

jtsaito

The AWS API Gateway supports signed requests as follows. The API Gateway client can use IAM credentials to sign a request in two steps:

1. The original request headers and body are signed using the SDK supplied by AWS and the credentials
2. The signature sets the X-Amz-SignedHeaders header

In practice, there are two ways for signing from a Ruby client using the AWS SDK: (1) signing with a Faraday plugin, (2) creating a Specific Gateway client using the Seahorse API declaration.

Here is a code snippet for the more quick and dirty Faraday solution.