ruwuma/CONTRIBUTING.md

Welcome! Thanks for looking into contributing to our project!

Table of Contents

• Looking for Help?
  • Documentation
  • Chat Rooms
• Reporting Issues
• Submitting Code
  • Coding Style
  • Modifying Endpoints
  • Submitting PRs
  • Where do I start?
• Testing
• Contact

Looking for Help?

Here is a list of helpful resources you can consult:

Documentation

• Matrix spec Documentation

Chat Rooms

• Ruma Matrix room: #ruma:matrix.org
• Matrix Developer room: #matrix-dev:matrix.org

Reporting Issues

If you find any bugs, inconsistencies or other problems, feel free to submit a GitHub issue.

If you have a quick question, it may be easier to leave a message on #ruma:matrix.org.

Also, if you have trouble getting on board, let us know so we can help future contributors to the project overcome that hurdle too.

Submitting Code

Ready to write some code? Great! Here are some guidelines to follow to help you on your way:

Coding Style

In general, try to replicate the coding style that is already present. Specifically:

Common types

When writing endpoint definitions, use the following mapping from request / response field types listed in the specification to Rust types:

Specification type	Rust type
boolean	bool
integer	js_int::UInt (unless denoted as signed, then js_int::Int)
string	If for an identifier (e.g. user ID, room ID), use one of the types from ruma-identifiers. Otherwise, use String.
object	serde_json::Value
[…]	Vec<…>
{string: …}	BTreeMap<String, …> (or BTreeMap<SomeId, …>)

Import Formatting

Organize your imports into three groups separated by blank lines:

1. std imports
2. External imports (from other crates)
3. Local imports (self::, super::, crate:: and things like LocalEnum::*)

For example,

use std::collections::BTreeMap;

use ruma_api::ruma_api;

use super::MyType;

Also, group imports by module. For example, do this:

use std::{
    collections::BTreeMap,
    convert::TryFrom,
    fmt::{self, Debug, Display, Formatter},
};

as opposed to:

use std::collections::BTreeMap;
use std::convert::TryFrom;
use std::fmt::{self, Debug, Display, Formatter};

Serde Imports

When importing methods and types from serde_json, methods should be such as serde_json::{from,to}_{slice,string,value,vec} should be imported as {from,to}_json_{slice,string,value,vec}.

For example:

use serde_json::{
  from_value as from_json_value,
  to_str as to_json_str,
};

Also, serde_json::Value should be imported as JsonValue.

Code Formatting and Linting

Use rustfmt to format your code and clippy to lint your code. Before committing your changes, go ahead and run cargo fmt and cargo clippy --all-targets --all-features on the repository to make sure that the formatting and linting checks pass in CI. Note that clippy warnings are reported as errors in CI builds, so make sure to handle those before comitting as well. (To install the tools, run rustup component add rustfmt clippy.)

Commit Messages

Write commit messages using the imperative mood, as if completing the sentence: "If applied, this commit will ___." For example, use "Fix some bug" instead of "Fixed some bug" or "Add a feature" instead of "Added a feature".

(Take a look at this blog post for more information on writing good commit messages.)

Modifying Endpoints

Matrix Spec Version

Use the latest r0.x.x documentation when adding or modifying code. We target the latest minor version of the Matrix specification. (Note: We might reconsider this when the Client-Server API hits r1.0.0.)

Endpoint Documentation Header

Add a comment to the top of each endpoint file that includes the path and a link to the documentation of the spec. You can use the latest version at the time of the commit. For example:

//! [GET /.well-known/matrix/client](https://matrix.org/docs/spec/client_server/r0.4.0#get-well-known-matrix-client)

Naming Endpoints

When adding new endpoints, select the module that fits the purpose of the endpoint. When naming the endpoint itself, you can use the following guidelines:

• The name should be a verb describing what the client is requesting, e.g. get_some_resource.
• Endpoints which are basic CRUD operations should use the prefixes create, get, update, and delete.
• The prefix set is preferred to create if the resource is a singleton. In other words, when there's no distinction between create and update.
• Try to use names that are as descriptive as possible and distinct from other endpoints in all other modules. (For example, instead of r0::room::get_event, use r0::room::get_room_event).
• If you're not sure what to name it, pick any name and we can help you with it.

Tracking Changes

Add your changes to the change log. If possible, try to find and denote the version of the spec that included the change you are making.

Submitting PRs

Once you're ready to submit your code, create a pull request, and one of our maintainers will review it. Once your PR has passed review, a maintainer will merge the request and you're done! 🎉

Where do I start?

If this is your first contribution to the project, we recommend taking a look at one of the open issues we've marked for new contributors.

Testing

Before committing, run cargo check to make sure that your changes can build, as well as running the formatting and linting tools mentioned above.

Contact

Thanks again for being a contributor! If you have any questions, join us at #ruma:matrix.org.