See what the Nerves core team and community have been working on recently and where you can learn more about Nerves at upcoming training events - http://embedded-elixir.com/post/2018-01-02-nerves-update/

I wrote a little how-to on setting up logging to Papertrail from a headless Raspberry Pi running Nerves.

https://timgilbert.wordpress.com/2017/12/31/logging-from-headless-nerves-machines-to-papertrail/

https://youtu.be/8GUFE0F8pE8

Building the http://Alchemist.Camp website, Part 8.

Let’s write some macros and make a nice router DSL like Phoenix has!

I learned quite a bit after completing this year’s Advent of Code challenges with Elixir. Check it out!

Walk through the creation of a fully featured Nerves starter project

https://nerves.build/posts/nerves-0-11

Just blogged about how one could pattern match function clauses against the implementations of the protocol.

http://rocket-science.ru/hacking/2018/01/03/pattern-matcher-for-protocols

https://youtu.be/JjV2LXvjU54

Building the http://Alchemist.Camp website, Part 7. It’s time to make controllers.

Our router was starting to look like a kitchen sink so we factored a controller out of the app and started pulling some code into a framework. This required the use of simple macros.

Elasticsearch is a new Elixir library for interacting with Elasticsearch. Highlights include:

• No DSLs. Interact directly with the Elasticsearch JSON API through simple get/put/post/delete functions.
• Zero-downtime index (re)building. Via an included mix task.
• Dev Tools. Helpers for running Elasticsearch as part of your supervision tree during development.

It’s based on protocols and behaviours, so it’s both simple and flexible.

Cloak makes it easy to encrypt data in your Ecto schemas. This new release adds several new features, including support for AES.GCM encryption.

https://github.com/danielberkompas/cloak/releases/tag/v0.4.0

Enhancements

• mix runs will be faster as they will no longer check to see if the SDK is updated.

Bug Fixes

• Avoid problems with read and write locks when updating Elixir SDK on-demand by instead updating them when any project is open using a project converter.
• JetBrains/intellij-community@9adbba0 added @NotNull to OrderRootType.getOrderRootType, which JavaDocRootType.getInstance calls, which means any Small IDE using intellij-community since 4 months ago, including the newest CLion cannot have JavadocOrderRootType.getInstance safely called.
• Path changes were not being written back to disk because the projectSdksModel.apply() was being called before the editor.apply(), which would have copied to the editor’s path changes to the projectSdksModel.

Installation Instructions

Check it out: https://spawnfest.github.io/winners/ Congratulation @micmus, @bondalex & @andrewdryga!! You won, big time!

Enhancements

• Elixir Facet in Small IDEs

  • Preferences > Languages & Frameworks > Elixir can set the Elixir Facet SDK for the Project Module used in Small IDEs as a per-project settings.
  • Preferences > Languages & Frameworks > Elixir> SDKs can add, delete, and configure Elixir SDKs as per-application settings.
  • Preferences > Languages * Frameworks > Elixir > Internal SDKs can add, delete, and configure Erlang SDK for Elixir SDKs as per-application settings.

• Configure SDK before running mix when importing mix projects, so that the mix path does not need to be configured separately from the SDK path.

  • The mix path no longer needs to be setup independently from the Elixir SDK.

• Add Local shared credo inspection, so the the credo inspection works for Code > Code Cleanup.

  • Show Mix ExUnit in context menu in Elixir Facets, so that
    • Run ‘Mix ExUnit …’
    • Debug ‘Mix ExUnit …’
    • “Create “Mix ExUnit …’”
    appear in Rubymine when you right-click the test directory and it is Marked as a Test Sources Root. It will appear green in Rubymine if already marked. To mark it, do the following:
    1. Right-Click test directory
    2. Select “Mark Directory as > Test Sources Root”

Bug Fixes

• Protect access to JavadocOrderRootType.getInstance() so that it doesn’t cause an error in Small IDEs where its Extension Point is not defined.
• If the explanation tooltip is empty, fallback to the message for the credo annotator instead.
• Check if SdkAdditionalData is null before getting ErlangSDK as it can be null in certain scenarios in Rubymine.
• Fix isConfigurationFromContext, so that it works on Mix ExUnit Run Configurations generated from directories. Check if the programParameters and workingDirectory match by just generating another configuration from the context as this ensures the logic matches and includes support for PsiDirectory.

Installation Instructions

I’ve just published this year’s Elixir Users’ Survey. If you’d visit this link and fill it out for me I would sincerely appreciate it! :)

https://www.dailydrip.com/blog/elixir-users-survey-2017

https://hex.pm/packages/raxx/1.0.0-rc.2

Raxx is a simple, functional foundation for web applications. It’s role is as an alternative to plug.

This release adds typespecs throughout to work with dialyzer.

Blogged about .iex.exs file tuning and project-specific iex configurations goodness.

— http://rocket-science.ru/hacking/2017/12/29/iex.exs-to-the-rescue

Here’s a walkthrough for unit testing Phoenix controllers using Mox, from installation to basic mocking strategies

https://spin.atomicobject.com/2017/12/27/elixir-mox-introduction/

Elixir practice: encontrando todos os anos bissextos do século 20 com Elixir.

https://medium.com/@renatoramiro/elixir-practice-encontrando-todos-os-anos-bissextos-do-século-20-com-elixir-7b62c3da10a0

This is the first of three posts that will guide you through the implementation of a simple peer-to-peer network in Elixir.

On this post we’ll be creating the server and will learn how to use the Ranch library.

Implementing a peer-to-peer network in Elixir - Part 1: The Server

In this blog post we will take a look at a simple example of refactoring Elixir code using with syntax (called a “special form” in the documentation), and guard clauses.

Elixir “with” syntax and guard clauses

I just put together a fairly detailed write-up on how I use Ecto as generic data types casting and validation library. If you are looking for a way to create table-less form with Phoenix, validate user commands, create sign up or contact forms that do not map directly to database tables, it might come in handy:

(Ab)using Ecto as Elixir data casting and validation library