Grayson Koonce - Grayson Koonce

Deploying to Google App Engine from Travis CI

This post details how to automate the deployment of a Docker application to Google App Engine using Travis CI. In the previous post, we wrote a tiny service called hellogo with a structure like so: . ├── Dockerfile ├── app.yaml └── main.go The app.yaml file

gcp

Deploying to Google App Engine using Docker

This post details how to deploy a Docker service to Google App Engine using App Engine Flexible Environment. Create an HTTP Server Let's start by writing a simple Hello World server using Golang in a project called hellogo: $ mkdir -p $GOPATH/src/github.com/

git

Stacked Pull Requests: Keeping GitHub Diffs Small

Code reviews aren't just for catching bugs. They also help teams: Build trust and create a shared coding standard Force the discussion and vetting of code design Prevent broken windows But if a pull request gets too big, it causes code review fatigue: What

golang

Solving ring-shaped problems with Go's container/ring

This post was featured in Golang Weekly Issue 107. Certain problems are solved best with certain data-structures. Golang's container/ring is well suited to problems with fixed data-sets that need circular traversal, and FIFO-like queue operations. Take the following problem: Given a set of

tech interviews

Getting a unix timestamp in C++

Choosing C++ as an interview-language for a code exercise? It's difficult to interview in C++ It's difficult to find quick working C++ snippets online Things like getting the current timestamp in seconds can trip candidates up. Here's a quick recipe when you're in a

python

Better Package Management for Python Libraries

This post adds guidance for Python libraries to the fantastic write-up, Better Package Management. As a maintainer of a Python library, you can break down managing dependencies into 3 concerns. How do I specify required and optional dependencies for consumers of my library? How

python

Converting Tornado coroutines to callbacks

Tornado coroutines simplify asynchronous code at the cost of a performance overhead incurred by wrapping the Stack Context to manage the lifecycle of the coroutine. When performance is critical, and by critical I mean you've measured that this is something you need to do,

travis-ci

Getting the current branch name during a Pull Request in Travis

TLDR - here's the .travis.yml -- Be careful about using the $TRAVIS_BRANCH environment variable to access the name of the current HEAD branch during a build. The description

docker

Managing Docker & Docker Compose versions on Travis

When Travis launched Docker Support, I assumed it would let you manage the versions of Docker and Docker Compose - that is far from correct. What I wanted to do: Install Docker 1.10 on Travis Install Docker Compose 1.6.0 on Travis

Makefile

Makefile - Top-level Environment Variables

Did you know it was possible to export environment variables at the top-level of a Makefile? The following Makefile illustrates just that: export MSG="Hello World!" .PHONY: hello hello: @echo $(MSG) And the output: $ make hello Hello World! It's also possible to

golang

FizzBuzz in Golang

FizzBuzz goes like so: Write a program that prints the numbers 1 to 100. For multiples of three, print "Fizz". For multiples of five, print "Buzz". For multiples of both three and five, print "FizzBuzz". In a hurry?

python

Waiting until a Thread is ready in Python

Concurrency in Python can be tricky. Users of the threading module know how easy it is to get wrong. One thing that bit me quite a bit was how easy it was to get races when using threading.Thread. The Race Condition The following

python

Always use None for default args in Python

I've came across plenty of Python developers who use default values directly in their method signature - after all, why wouldn't they? At first, that seemed a completely logical thing to do, but after working with Python for years I've come to realize that