Xtask CI (#1387)

This PR is easiest to review commit by commit.

Followup on https://github.com/bevyengine/bevy/pull/1309#issuecomment-767310084

- [x] Switch from a bash script to an xtask rust workspace member.
  - Results in ~30s longer CI due to compilation of the xtask itself
  - Enables Bevy contributors on any platform to run `cargo ci` to run linting -- if the default available Rust is the same version as on CI, then the command should give an identical result.
- [x] Use the xtask from official CI so there's only one place to update.
- [x] Bonus: Run clippy on the _entire_ workspace (existing CI setup was missing the `--workspace` flag
  - [x] Clean up newly-exposed clippy errors 

~#1388 builds on this to clean up newly discovered clippy errors -- I thought it might be nicer as a separate PR.~  Nope, merged it into this one so CI would pass.

Co-authored-by: Carter Anderson <mcanders1@gmail.com>

.cargo/config_fast_builds

@@ -1,4 +1,4 @@
-# Rename this file to `config.toml` to enable "fast build" configuration. Please read the notes below.
+# Add the contents of this file to `config.toml` to enable "fast build" configuration. Please read the notes below.
 
 # NOTE: For maximum performance, build using a nightly compiler
 # If you are using rust stable, remove the "-Zshare-generics=y" below (as well as "-Csplit-debuginfo=unpacked" when building on macOS).

.github/workflows/ci.yml

@@ -34,13 +34,8 @@ jobs:
         if: runner.os == 'linux'
 
       - name: Check the format
-        run: cargo fmt --all -- --check
-        if: runner.os == 'linux' && matrix.toolchain == 'stable'
-
-      # -A clippy::type_complexity: type complexity must be ignored because we use huge templates for queries.
-      # -A clippy::manual-strip: strip_prefix support was added in 1.45. We want to support earlier rust versions.
-      - name: Clippy
-        run: cargo clippy --all-targets --all-features -- -D warnings -A clippy::type_complexity -A clippy::manual-strip
+        # See tools/ci/src/main.rs for the commands this runs
+        run: cargo run --package ci
         if: runner.os == 'linux' && matrix.toolchain == 'stable'
 
       - name: Build & run tests

Cargo.toml

@@ -17,7 +17,7 @@ repository = "https://github.com/bevyengine/bevy"
 
 [workspace]
 exclude = ["benches"]
-members = ["crates/*", "examples/ios"]
+members = ["crates/*", "examples/ios", "tools/ci"]
 
 [features]
 default = [

benches/benches/bevy_ecs/bench.rs

@@ -32,7 +32,7 @@ fn spawn_static(b: &mut Bencher) {
     struct Bundle {
         pos: Position,
         vel: Velocity,
-    };
+    }
 
     let mut world = World::new();
     b.iter(|| {
@@ -48,7 +48,7 @@ fn spawn_batch(b: &mut Bencher) {
     struct Bundle {
         pos: Position,
         vel: Velocity,
-    };
+    }
 
     let mut world = World::new();
     b.iter(|| {

crates/bevy_core/src/time/time.rs

@@ -89,6 +89,7 @@ pub(crate) fn time_system(mut time: ResMut<Time>) {
 }
 
 #[cfg(test)]
+#[allow(clippy::float_cmp)]
 mod tests {
     use super::Time;
     use bevy_utils::{Duration, Instant};

crates/bevy_core/src/time/timer.rs

@@ -157,6 +157,7 @@ impl Timer {
 }
 
 #[cfg(test)]
+#[allow(clippy::float_cmp)]
 mod tests {
     use super::Timer;
 

crates/bevy_ecs/src/core/serde.rs

@@ -17,7 +17,7 @@ impl<'de> Deserialize<'de> for Entity {
     where
         D: serde::Deserializer<'de>,
     {
-        Ok(deserializer.deserialize_u32(EntityVisitor)?)
+        deserializer.deserialize_u32(EntityVisitor)
     }
 }
 

crates/bevy_ecs/src/core/world.rs

@@ -45,8 +45,7 @@ impl World {
     /// Create an empty world
     pub fn new() -> Self {
         // `flush` assumes archetype 0 always exists, representing entities with no components.
-        let mut archetypes = Vec::new();
-        archetypes.push(Archetype::new(Vec::new()));
+        let archetypes = vec![Archetype::new(Vec::new())];
         let mut index = HashMap::default();
         index.insert(Vec::new(), 0);
         Self {

crates/bevy_ecs/src/resource/resources.rs

@@ -1,4 +1,4 @@
-use crate::{system::SystemId, AtomicBorrow, TypeInfo};
+use crate::{system::SystemId, AtomicBorrow};
 use bevy_utils::HashMap;
 use core::any::TypeId;
 use downcast_rs::{impl_downcast, Downcast};
@@ -204,15 +204,14 @@ impl Resources {
 
     fn insert_resource<T: Resource>(&mut self, resource: T, resource_index: ResourceIndex) {
         let type_id = TypeId::of::<T>();
-        let data = self.resource_data.entry(type_id).or_insert_with(|| {
-            let mut types = Vec::new();
-            types.push(TypeInfo::of::<T>());
-            ResourceData {
+        let data = self
+            .resource_data
+            .entry(type_id)
+            .or_insert_with(|| ResourceData {
                 storage: Box::new(VecResourceStorage::<T>::default()),
                 default_index: None,
                 system_id_to_archetype_index: HashMap::default(),
-            }
-        });
+            });
 
         let storage = data
             .storage
@@ -500,6 +499,7 @@ mod tests {
     use crate::system::SystemId;
 
     #[test]
+    #[allow(clippy::float_cmp)]
     fn resource() {
         let mut resources = Resources::default();
         assert!(resources.get::<i32>().is_none());

crates/bevy_ecs/src/system/commands.rs

@@ -425,6 +425,7 @@ impl Commands {
 }
 
 #[cfg(test)]
+#[allow(clippy::float_cmp, clippy::approx_constant)]
 mod tests {
     use crate::{resource::Resources, Commands, World};
     use core::any::TypeId;
@@ -480,7 +481,7 @@ mod tests {
             .map(|(a, b)| (*a, *b))
             .collect::<Vec<_>>();
         assert_eq!(results_after, vec![]);
-        let results_after_u64 = world.query::<&u64>().map(|a| *a).collect::<Vec<_>>();
+        let results_after_u64 = world.query::<&u64>().copied().collect::<Vec<_>>();
         assert_eq!(results_after_u64, vec![]);
     }
 

crates/bevy_reflect/src/lib.rs

@@ -56,6 +56,7 @@ pub use bevy_reflect_derive::*;
 pub use erased_serde;
 
 #[cfg(test)]
+#[allow(clippy::blacklisted_name, clippy::approx_constant)]
 mod tests {
     use ::serde::de::DeserializeSeed;
     use bevy_utils::HashMap;
@@ -67,6 +68,7 @@ mod tests {
     use crate::serde::{ReflectDeserializer, ReflectSerializer};
 
     use super::*;
+
     #[test]
     fn reflect_struct() {
         #[derive(Reflect)]
@@ -145,6 +147,7 @@ mod tests {
     }
 
     #[test]
+    #[allow(clippy::blacklisted_name)]
     fn reflect_unit_struct() {
         #[derive(Reflect)]
         struct Foo(u32, u64);

crates/bevy_reflect/src/path.rs

@@ -305,6 +305,7 @@ fn next_token<'a>(path: &'a str, index: &mut usize) -> Option<Token<'a>> {
 }
 
 #[cfg(test)]
+#[allow(clippy::float_cmp, clippy::approx_constant)]
 mod tests {
     use super::GetPath;
     use crate::*;

crates/bevy_render/src/renderer/render_resource/render_resource_bindings.rs

@@ -330,12 +330,12 @@ mod tests {
         bindings.set("b", resource2.clone());
 
         let mut different_bindings = RenderResourceBindings::default();
-        different_bindings.set("a", resource3.clone());
-        different_bindings.set("b", resource4.clone());
+        different_bindings.set("a", resource3);
+        different_bindings.set("b", resource4);
 
         let mut equal_bindings = RenderResourceBindings::default();
         equal_bindings.set("a", resource1.clone());
-        equal_bindings.set("b", resource2.clone());
+        equal_bindings.set("b", resource2);
 
         let status = bindings.update_bind_group_status(&bind_group_descriptor);
         let id = if let BindGroupStatus::Changed(id) = status {
@@ -368,7 +368,7 @@ mod tests {
         };
 
         let mut unmatched_bindings = RenderResourceBindings::default();
-        unmatched_bindings.set("a", resource1.clone());
+        unmatched_bindings.set("a", resource1);
         let unmatched_bind_group_status =
             unmatched_bindings.update_bind_group_status(&bind_group_descriptor);
         assert_eq!(unmatched_bind_group_status, BindGroupStatus::NoMatch);

crates/bevy_render/src/shader/shader.rs

@@ -46,9 +46,9 @@ pub enum ShaderError {
     not(target_arch = "wasm32"),
     not(all(target_arch = "aarch64", target_os = "macos"))
 ))]
-impl Into<bevy_glsl_to_spirv::ShaderType> for ShaderStage {
-    fn into(self) -> bevy_glsl_to_spirv::ShaderType {
-        match self {
+impl From<ShaderStage> for bevy_glsl_to_spirv::ShaderType {
+    fn from(s: ShaderStage) -> bevy_glsl_to_spirv::ShaderType {
+        match s {
             ShaderStage::Vertex => bevy_glsl_to_spirv::ShaderType::Vertex,
             ShaderStage::Fragment => bevy_glsl_to_spirv::ShaderType::Fragment,
             ShaderStage::Compute => bevy_glsl_to_spirv::ShaderType::Compute,

crates/bevy_tasks/src/task_pool.rs

@@ -269,6 +269,7 @@ impl<'scope, T: Send + 'scope> Scope<'scope, T> {
 }
 
 #[cfg(test)]
+#[allow(clippy::blacklisted_name)]
 mod tests {
     use super::*;
     use std::sync::{

tools/ci

@@ -1,20 +0,0 @@
-#!/usr/bin/env bash
-
-# This script is intended to mimic some CI behavior that we encourage contributors to run locally.
-# For the actual CI run on GitHub, see the files in .github/workflows/
-
-# Exit when any command fails
-set -e
-
-# Keep track of the last executed command
-trap 'last_command=$current_command; current_command=$BASH_COMMAND' DEBUG
-# Echo an error message before exiting, so you can see exactly what command and what error code
-trap 'echo "\"${last_command}\" command filed with exit code $?."' EXIT
-
-## ACTUAL COMMANDS
-
-# Auto-format Rust files
-cargo +nightly fmt --all
-
-# Run a more intensive linter
-cargo clippy --all-targets --all-features -- -D warnings -A clippy::type_complexity -A clippy::manual-strip

tools/ci/Cargo.toml

@@ -0,0 +1,13 @@
+[package]
+name = "ci"
+version = "0.1.0"
+authors = [
+    "Bevy Contributors <bevyengine@gmail.com>",
+    "Nathan Stocks <nathan@agileperception.com>"
+]
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+xshell = "0.1"

tools/ci/src/main.rs

@@ -0,0 +1,19 @@
+use xshell::cmd;
+
+fn main() {
+    // When run locally, results may from actual CI runs triggered by .github/workflows/ci.yml
+    // - Official CI runs latest stable
+    // - Local runs use whatever the default Rust is locally
+
+    // See if any code needs to be formatted
+    cmd!("cargo fmt --all -- --check")
+        .run()
+        .expect("Please run 'cargo fmt --all' to format your code.");
+
+    // See if clippy has any complaints.
+    // - Type complexity must be ignored because we use huge templates for queries
+    // - `-A clippy::manual-strip` strip_prefix support was added in 1.45
+    cmd!("cargo clippy --workspace --all-targets --all-features -- -D warnings -A clippy::type_complexity -A clippy::manual-strip")
+    .run()
+    .expect("Please fix clippy errors in output above.");
+}