View Source Overview

Legendary is a boilerplate for developing PETAL-stack Phoenix/Elixir applications without reinventing the wheel. Out-of-the-box, we include many features that are commonly needed in web applications:

  • Features
    • Authentication & Authorization
    • Admin interface & dashboard
    • Lightweight content management / blogging
    • Background & scheduled jobs with Oban
  • Frontend Frameworks
    • Tailwind CSS
    • Alpine JS
    • Fluid HTML email templates
  • Full CI / DevOps scripts included
    • GitLab CI
    • credo (Elixir linting), Prettier (JS formatting), stylelint (CSS linting)
    • sobelow (Elixir security scans)
    • Dockerfile
    • Complete Kubernetes manifests
    • configuration

We got tired of setting these things up from scratch on every Phoenix application. So, we built a boilerplate that lets you start with the unique & interesting thing that only your application does. We have a roadmap for future feature development because we still think there are a lot more things we can do to make Phoenix development better.


Up and Running

Since Legendary is both a template and a framework, you can simply clone the repo to start using it. It's a fully functional Phoenix app as-is. To start a new project:

git clone <project_name>

In order to start the server, run script/server. Any dependencies required will be installed automatically using brew, asdf, and hex.

Now you can visit localhost:4000 from your browser.



Check out the tutorial to learn how to build your first app with Legendary.

Your main app lives in apps/app/ and you will do most of your development there. This is a normal Phoenix application and you can develop it as such. Any resources which apply to developing Phoenix applications will apply inside of the app. See the Phoenix Guides for a good starting resource in Phoenix development.

You should not generally need to change code in the other applications which are part of the framework-- apps/admin, apps/content, apps/core. We encourage you to avoid changing those as much as possible, because doing so will make it more difficult to upgrade Legendary to newer versions. However, they are available to you if you find that there are no other ways to accomplish the changes that you want. If you find yourself adding functionality to admin, content, or core that you feel would be beneficial to all Legendary apps, consider making a code contribution back to the framework!


CI Configuration

Legendary comes with GitLab CI settings which should work for you with minimal setup.

The CI script will automatically tag successful builds. To do this, you will need to configure a CI variable named GITLAB_TOKEN. This token should be a personal access token with read_repository, write_repository permissions.



The preconfigured CI pipeline generates semantically versioned docker images that you can deploy in your choice of dockerized hosting. We also provide a manifest for Kubernetes that is automatically updated with each version (see infrastructure/ for the generated result and infrastructure_templates/ for the templates used to generate the manifest). We also provide a configuration for that works out of the box.