Phoenix Channel Workshop

Every runtime dependencies are defined in the .tool-versions file. These external dependencies are also required:

• PostgreSQL (~> 12.0)

All required environment variables are documented in .env.dev.

When running mix or make commands, it is important that these variables are present in the environment. There are several ways to achieve this. Using nv is recommended since it works out of the box with .env.* files.

1. Create both .env.dev.local and .env.test.local from empty values in .env.dev and .env.test
2. Install Mix and NPM dependencies with make dependencies
3. Generate values for mandatory secrets in .env.dev with mix phx.gen.secret

Then, with variables from .env.dev and .env.dev.local present in the environment:

4. Create and migrate the database with mix ecto.setup
5. Start the Phoenix server with make run

A Makefile is present at the root and expose common tasks. The list of these commands is available with make help.

To avoid running PostgreSQL locally on your machine, a docker-compose.yml file is included to be able start a PostgreSQL server in a Docker container with docker-compose up postgresql.

Tests can be ran with make test and test coverage can be calculated with make check-code-coverage.

Several linting and formatting tools can be ran to ensure coding style consistency:

• make lint-elixir ensures Elixir code follows our guidelines and best practices
• make lint-scripts ensures JavaScript code follows our guidelines and best practices
• make lint-styles ensures SCSS code follows our guidelines and best practices
• make check-format ensures all code is properly formatted
• make format formats files using Prettier and mix format

The .github/workflows/ci.yaml workflow ensures that the codebase is in good shape on each pull request and branch push.

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The project exposes a GET /ping route that sends an HTTP 200 OK response as soon as the server is ready to accept requests. The response also contains the project version for debugging purpose.

The project exposes a GET /health route that serves the PhoenixChannelWorkshopHealth module. This module contains checks to make sure the application and its external dependencies are healthy.

Each deployment is made from a Git tag. The codebase version is managed with incr.

A Docker image running an OTP release can be created with make build, tested with docker-compose up application and pushed to a registry with make push.