Elixir Remote Debugging
In Elixir, it's possible to connect nodes together to form a cluster in which all the nodes are visible to each other. This feature can be used to inspect and debug production apps running on remote nodes. Let's see how we can connect to an Elixir node running inside a docker container remotely from a local iex shell and use Erlang's debugger tool to set breakpoints and debug the code running in t
Elixir/Phoenix deployments using Distillery
Of late, we have been porting one of our internal apps from Rails to Phoenix. We are using Capistrano for deploying Rails apps. We have Jenkins CI which listens to features merged into master, and uses Capistrano to deploy to production. For Elixir/Phoenix, we are looking for something similar. Merge features into master, let Jenkins CI run, and package Phoenix app which can be run on production.
Understanding Exit Signals in Erlang/Elixir
"Process linking and how processes send and handle exit signals" - a very important topic to understand in order to build robust apps in Erlang or Elixir, but also the source of a lot of confusions for beginners. In this post, we'll cover this topic and understand it well, once and for all. Note: Processes are the same in both Erlang and Elixir, so everything below is equally applicable to both la
Working with Rails, Webpack and Heroku
Note: This Rails version targeted in the post is one before webpacker got added. The folder structure and procedure might differ if you're using a newer version of Rails. But the context does help. Deployment of a Rails app that uses Webpack to Heroku is tricky because it requires both Node.js and Ruby. After various unsuccessful attempts, I had a solution that worked without customizing Heroku bu
Visualizing Parallel Requests in Elixir
We have been evaluating Elixir at Codemancers and today I was learning how to spin up a minimal HTTP API endpoint using Elixir. Like Rack in Ruby land, Elixir comes with Plug, a swiss army knife for dealing with HTTP connections. Using Plug to build an HTTP endpoint First, let's create a new Elixir project:
Setting up Emacs as Ruby development environment on OSX
Learning and setting up Emacs can be intimidating and while some folks find much use in using a pre-configured setup like - Emacs Prelude, I personally think it is better that someone new to Emacs installs each and every module himself and learns from it. I am assuming OSX as development environment here but the instructions should work well enough on Linux as well. Install Emacs : Install Emacs u
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Switching an existing Phoenix app from Brunch to Webpack
