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Update CONTRIBUTING.md

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CONTRIBUTING.md
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@ -7,11 +7,11 @@ To _use_ Valence, only the most recent stable version of Rust is required. Howev
unstable `rustfmt` settings are enabled in the project. To run `rustfmt` with the nightly toolchain, use unstable `rustfmt` settings are enabled in the project. To run `rustfmt` with the nightly toolchain, use
the `cargo +nightly fmt` command. the `cargo +nightly fmt` command.
# What issues can I work on? # What issues should I work on?
Issues Issues
labelled [good first issue](https://github.com/valence-rs/valence/issues?q=is%3Aissue+is%3Aopen+label%3A%22good+first+issue%22) 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 are a good place to start. This label is reserved for issues that are relatively uncontroversial and shouldn't require too much specialized domain
knowledge to complete. New contributors are not required to start with these issues. 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 If you plan to work on something that's not an open issue, consider making one first so that it can be discussed. This
@ -83,7 +83,15 @@ struct Bar {
## Getters and Setters ## Getters and Setters
Getters and setters should be named like this: Getters should not start with a `get_` prefix.
<table>
<tr>
<th>Good</th>
<th>Bad</th>
</tr>
<tr>
<td>
```rust ```rust
impl Foo { impl Foo {
@ -91,8 +99,8 @@ impl Foo {
fn set_bar(&mut self, bar: Bar) { ... } fn set_bar(&mut self, bar: Bar) { ... }
} }
``` ```
</td>
And **not** like this: <td>
```rust ```rust
impl Foo { impl Foo {
@ -100,6 +108,9 @@ impl Foo {
fn set_bar(&mut self, bar: Bar) { ... } fn set_bar(&mut self, bar: Bar) { ... }
} }
``` ```
</td>
</tr>
</table>
See [`SocketAddr`](https://doc.rust-lang.org/stable/std/net/enum.SocketAddr.html) for an example of a standard library 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. type that uses this convention.
@ -111,24 +122,35 @@ this.
If a `bar` field exists and no invariants need to be maintained by the getters and setters, it is usually better to make 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. the `bar` field public.
## Bevy `Event` naming conventions ## Bevy `Event`s
Types intended to be used as events in [`EventReader`] and [`EventWriter`] should end in the `Event` suffix. Types intended to be used as events in [`EventReader`] and [`EventWriter`] should end in the `Event` suffix.
This is helpful for readers trying to distinguish events from other types in the program. This is helpful for readers trying to distinguish events from other types in the program.
Good: <table>
<tr>
<th>Good</th>
<th>Bad</th>
</tr>
<tr>
<td>
```rust ```rust
struct CollisionEvent { ... } struct CollisionEvent { ... }
fn handle_collisions(mut events: EventReader<CollisionEvent>) { ... } fn handle_collisions(mut events: EventReader<CollisionEvent>) { ... }
``` ```
</td>
<td>
Bad:
```rust ```rust
struct Collision { ... } struct Collision { ... }
fn handle_collisions(mut events: EventReader<Collision>) { ... } fn handle_collisions(mut events: EventReader<Collision>) { ... }
``` ```
</td>
</tr>
</table>
[`EventReader`]: https://docs.rs/bevy_ecs/latest/bevy_ecs/event/struct.EventReader.html [`EventReader`]: https://docs.rs/bevy_ecs/latest/bevy_ecs/event/struct.EventReader.html
[`EventWriter`]: https://docs.rs/bevy_ecs/latest/bevy_ecs/event/struct.EventWriter.html [`EventWriter`]: https://docs.rs/bevy_ecs/latest/bevy_ecs/event/struct.EventWriter.html
@ -137,17 +159,62 @@ fn handle_collisions(mut events: EventReader<Collision>) { ... }
When adding a new dependency to a crate, make sure you specify the full semver version. When adding a new dependency to a crate, make sure you specify the full semver version.
Do this: <table>
<tr>
<th>Good</th>
<th>Bad</th>
</tr>
<tr>
<td>
```toml ```toml
[dependencies] [dependencies]
serde_json = "1.0.96" serde_json = "1.0.96"
``` ```
</td>
<td>
And _not_ this:
```toml ```toml
[dependencies] [dependencies]
serde_json = "1" serde_json = "1"
``` ```
</td>
</tr>
</table>
## Writing Unit Tests
When writing unit tests, unwrap errors instead of returning them.
Panicking displays the line and column of the error, which is useful for debugging.
This information is lost when the error is returned.
<table>
<tr>
<th>Good</th>
<th>Bad</th>
</tr>
<tr>
<td>
```rust
#[test]
fn my_test() {
some_fallible_func().unwrap();
}
```
</td>
<td>
```rust
#[test]
fn my_test() -> anyhow::Result<()> {
some_fallible_func()?;
// ...
Ok(())
}
```
</td>
</tr>
</table>
## Documentation ## Documentation
@ -164,5 +231,25 @@ whole-server unit tests can be found in [`crates/valence/src/tests/`](crates/val
## Naming Quantities ## Naming Quantities
Quantities of something should be named `foo_count` where `foo` is the thing you're quantifying. It would be incorrect Variables intended to hold quantities should be written with the `_count` suffix instead of the `num_` prefix.
to name this variable `num_foos`.
<table>
<tr>
<th>Good</th>
<th>Bad</th>
</tr>
<tr>
<td>
```rust
let block_count = ...;
```
</td>
<td>
```rust
let num_blocks = ...;
```
</td>
</tr>
</table>