This document describes how to:
- Set up your dev environment
- Become familiar with Elm
- Develop against AlertManager
You can either use our default Docker setup or install all dev dependencies
locally. For the former you only need Docker installed, for the latter you need
to set the environment flag NO_DOCKER to true and have the following
dependencies installed:
- Elm
- Elm-Format is installed
In addition for easier development you can configure your editor.
All submitted elm code must be formatted with elm-format. Install and
execute it however works best for you. We recommend having formatting the file
on save, similar to how many developers use gofmt.
If you prefer, there's a make target available to format all elm source files:
# make format
- The Official Elm Guide is a great place to start. Going through the entire guide takes about an hour, and is a good primer to get involved in our codebase. Once you've worked through it, you should be able to start writing your feature with the help of the compiler.
- Check the syntax reference when you need a reminder of how the language works.
- Read up on how to write elm code.
- Watch videos from the latest elm-conf
- Learn how to use the debugger! Elm comes packaged with an excellent debugger. We've found this tool to be invaluable in understanding how the app is working as we're debugging behavior.
At the top level of this repo, follow the HA AlertManager instructions. Compile
the binary, then run with goreman. Add example alerts with the file provided
in the HA example folder. Then start the development server:
# cd ui/app
# make dev-server
Your app should be available at http://localhost:<port>. Navigate to
src/Main.elm. Any changes to the file system are detected automatically,
triggering a recompile of the project.
Before you commit changes, please run make build-all on the root level
Makefile. Please include asset/*_vfsdata.go in your commit.