cannery/CONTRIBUTING.md

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# Contribution Guide
Thanks for contributing to Cannery! Please read over the style tips to help make
contributing to Cannery (hopefully) as great of an experience as you found it!
## Translations needed!
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[![translation
status](https://weblate.bubbletea.dev/widgets/cannery/-/287x66-black.png)](https://weblate.bubbletea.dev/engage/cannery)
If you're multilingual, this project can use your translations! Visit
[weblate](https://weblate.bubbletea.dev/engage/cannery/) for more information.
## Style Tips
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- In order to cut down on code verbosity and readability, please try to use
inline `do:` blocks for short functions and make your aliases as short as
possible without introducing ambiguity.
- I.e. since there's only one `Changeset` in the app, please alias
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`Changeset.t(Type.t())` instead of using `Ecto.Changeset.t(Long.Type.t())`
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- Use pipelines when possible. If a function only calls a single method, a
pipeline isn't strictly necessary but still encouraged for future
modification.
- Please add typespecs to your functions! Even your private functions may be
used by others later down the line, and typespecs will be able to help
document your code just a little bit better, and improve the debugging
process.
- Typespec arguments can be named like `@spec function(arg_name :: type()) ::
return_type()`. Please use these for generic types, such as `map()` when the
input data isn't immediately obvious.
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- Please define all typespecs for a function together in one place, instead of
each function.
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- When making new models, please take inspiration from the existing models in
regards to layout of sections, typespec design, and formatting.
- With Elixir convention, for methods that raise on error please name them like
`function_that_raises!()`, and functions that return a boolean like
`function_that_returns_boolean?()`. For other methods, it's encouraged to use
status tuples for other functions like `{:ok, result}` or `{:error,
reason_or_changeset}` instead of just returning `result` or `nil` for easy
pattern matching.
- When adding text, please use `gettext` macros to enable things to be
translated in the future. After adding `gettext` macros, run `mix format` in
order to add your new text strings to the files in `priv/gettext`.
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- Before submitting a PR, please make sure all tests are passing using `mix test`.
And as always, thank you!
# Technical Information
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- Created using the [Phoenix Framework](https://www.phoenixframework.org)
- User Registration/Sign in via [`phx_gen_auth`](https://hexdocs.pm/phx_gen_auth/).
- `Dockerfile` and example `docker-compose.yml`
- Automatic migrations in `MIX_ENV=prod` or Docker image
- JS linting with [standard.js](https://standardjs.com), HEEx linting with
[heex_formatter](https://github.com/feliperenan/heex_formatter)
# Instructions
1. Clone the repo
1. Install the elixir and erlang binaries. I recommend using [asdf version
manager](https://asdf-vm.com/guide/getting-started.html#_1-install-dependencies),
which will use the `.tool-versions` file to install the correct versions of
Erlang, Elixir and npm for this project!
1. Run `mix deps.get` and `mix compile` to fetch all dependencies
1. Run `mix setup` to initialize your database.
1. Run `mix phx.server` to start the development server.
# Configuration
For development, I recommend setting environment variables with
[direnv](https://direnv.net).
By default, Cannery will always bind to all external IPv4 and IPv6 addresses in
`dev` and `prod` mode, respectively. If you would like to use different values,
they will need to be overridden in `config/dev.exs` and `config/runtime.exs` for
`dev` and `prod` modes, respectively.
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## `MIX_ENV=dev`
In `dev` mode, Cannery will listen for these environment variables at runtime.
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- `HOST`: External url to generate links with. Set this especially if you're
behind a reverse proxy. Defaults to `localhost`. External URLs will always be
generated with `https://` and port `443`.
- `PORT`: Internal port to bind to. Defaults to `4000`.
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- `DATABASE_URL`: Controls the database url to connect to. Defaults to
`ecto://postgres:postgres@localhost/cannery_dev`.
- `ECTO_IPV6`: Controls if Ecto should use IPv6 to connect to PostgreSQL.
Defaults to `false`.
- `POOL_SIZE`: Controls the pool size to use with PostgreSQL. Defaults to `10`.
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- `REGISTRATION`: Controls if user sign-up should be invite only or set to public. Set to `public` to enable public registration. Defaults to `invite`.
- `LOCALE`: Sets a custom locale. Defaults to `en_US`.
## `MIX_ENV=test`
In `test` mode (or in the Docker container), Cannery will listen for the same environment variables as dev mode, but also include the following at runtime:
- `TEST_DATABASE_URL`: REPLACES `DATABASE_URL`. Controls the database url to
connect to. Defaults to `ecto://postgres:postgres@localhost/cannery_test`.
- `MIX_TEST_PARTITION`: Only used if `TEST_DATABASE_URL` is not specified.
Appended to the default database url if you would like to partition your test
databases. Defaults to not set.
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## `MIX_ENV=prod`
In `prod` mode (or in the Docker container), Cannery will listen for the same environment variables as dev mode, but also include the following at runtime:
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- `SECRET_KEY_BASE`: Secret key base used to sign cookies. Must be generated
with `docker run -it shibaobun/cannery mix phx.gen.secret` and set for server to start.