valence/CONTRIBUTING.md
Ryan Johnson 8d93ddee24
Revise examples guideline and remove some examples. (#301)
# Description

- Removed the advice about making examples as small as possible in
CONTRIBUTING.md
- Remove a couple of low-value examples. I would like to remove more,
but their functionality would have to be covered by better examples
first.

My reasons are:
- Examples are tedious to update and maintain. Boilerplate is
inevitable.
- The "Boilerplate to code" ratio is higher when examples are smaller.
- Examples are likely the first thing that new users will try out, so we
ought to make a good first impression by showing something substantial.
- Complicated examples are better for showing how to use Valence in
practice and serve as a useful reference.
- Lots of small examples can distract from the more impressive ones.
Tiny examples don't add much value.
2023-03-23 06:54:07 -07:00

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Markdown

Valence has a public Discord server [here](https://discord.gg/8Fqqy9XrYb). Check it out if you have additional questions
or comments.
# What version of Rust should I use?
To _use_ Valence, only the most recent stable version of Rust is required. However, contributors should know that
unstable `rustfmt` settings are enabled in the project. To run `rustfmt` with the nightly toolchain, use
the `cargo +nightly fmt` command.
# What issues can I work on?
Issues
labelled [good first issue](https://github.com/valence-rs/valence/issues?q=is%3Aissue+is%3Aopen+label%3A%22good+first+issue%22)
are a good place to start. This label is reserved for issues that shouldn't require too much specialized domain
knowledge to complete. New contributors are not required to start with these issues.
If you plan to work on something that's not an open issue, consider making one first so that it can be discussed. This
way, your contribution will not be rejected when it is submitted for review.
## Playgrounds
Playgrounds are meant to provide a quick and minimal environment to test out new code or reproduce bugs. Playgrounds are also a great way test out quick ideas. This is the preferred method for providing code samples in issues and pull requests.
To get started with a new playground, copy the template to `playground.rs`.
```bash
cp crates/playground/src/playground.template.rs crates/playground/src/playground.rs
```
Make your changes to `crates/playground/src/playground.rs`. To run it:
```bash
cargo run -p playground # simply run the playground, or
cargo watch -c -x "run -p playground" # run the playground and watch for changes
```
# Automatic Checks
When you submit a pull request, your code will automatically run through clippy, rustfmt, etc. to check for any errors.
If an error does occur, it must be fixed before the pull request can be merged.
# Code Conventions
Here are some rules you should follow for your code. Generally the goal here is to be consistent with existing code, the
standard library, and the Rust ecosystem as a whole. Nonconforming code is not necessarily a blocker for accepting your
contribution. It's just nice to have.
These guidelines are intended to complement
the [Rust API Guidelines](https://rust-lang.github.io/api-guidelines/naming.html).
## Top-down Modules
Readers of the module should be able to understand your code by reading it from top to bottom.
Whenever [items](https://doc.rust-lang.org/reference/items.html) in your module form a parent-child relationship, the
parent should be written above the children. Typically this means that important `pub` items are placed before private
implementation details.
For instance, here are three functions. Notice how the definition of `foo` is placed above its dependencies. The parent
is `foo` while its children are `bar` and `baz`.
```rust
pub fn foo() {
bar();
baz();
}
fn bar() {}
fn baz() {}
```
This guideline applies to types as well.
```rust
pub struct Foo {
bars: Vec<Bar>,
}
struct Bar {
// ...
}
```
## Getters and Setters
Getters and setters should be named like this:
```rust
impl Foo {
fn bar(&self) -> &Bar { ... }
fn set_bar(&mut self, bar: Bar) { ... }
}
```
And **not** like this:
```rust
impl Foo {
fn get_bar(&self) -> &Bar { ... }
fn set_bar(&mut self, bar: Bar) { ... }
}
```
See [`SocketAddr`](https://doc.rust-lang.org/stable/std/net/enum.SocketAddr.html) for an example of a standard library
type that uses this convention.
Under appropriate circumstances a different naming scheme can be
used. [`Command`](https://doc.rust-lang.org/stable/std/process/struct.Command.html) is a standard type that demonstrates
this.
If a `bar` field exists and no invariants need to be maintained by the getters and setters, it is usually better to make
the `bar` field public.
## Naming Quantities
Quantities of something should be named `foo_count` where `foo` is the thing you're quantifying. It would be incorrect
to name this variable `num_foos`.
## Documentation
All public items should be documented. Documentation must be written with complete sentences and correct grammar.
Consider using [intra-doc links](https://doc.rust-lang.org/rustdoc/write-documentation/linking-to-items-by-name.html)
where appropriate.
## Unit Tests
Unit tests help your contributions last! They ensure that your code works as expected and that it continues to work in
the future.
You can find examples of unit tests in the `unit_test/example.rs` module.