Restructure CI tests

.github/workflows/benchmark.yml

@@ -1,7 +1,16 @@
 on:
+  push:
+    branches:
+      - master
+    paths:
+      - '**.rs'
   pull_request:
     paths:
       - '**.rs'
+  # `workflow_dispatch` allows CodSpeed to trigger backtest
+  # performance analysis in order to generate initial data.
+  workflow_dispatch:
+
 name: Benchmark pull requests
 jobs:
   runBenchmark:
@@ -11,9 +20,17 @@ jobs:
       - uses: actions/checkout@v3
         with:
           fetch-depth: 0
-      - uses: dtolnay/rust-toolchain@stable
-      - uses: boa-dev/criterion-compare-action@v3
+      - name: Setup rust toolchain, cache and cargo-codspeed binary
+        uses: moonrepo/setup-rust@v0
+        with:
+          channel: stable
+          cache-target: release
+          bins: cargo-codspeed
+      - name: Build the benchmark target(s)
+        run: cargo codspeed build -p palette --features wide
+      - name: Run the benchmarks
+        uses: CodSpeedHQ/action@v1
         with:
-          token: ${{ secrets.GITHUB_TOKEN }}
-          branchName: ${{ github.base_ref }}
-          features: "wide"
+          run: cargo codspeed run
+          working-directory: palette # mimics how tests work, so the colors CSV can be found
+          token: ${{ secrets.CODSPEED_TOKEN }}

.github/workflows/ci.yml

@@ -11,34 +11,58 @@ on:
 name: Continuous integration
 
 jobs:
-  compile_and_test:
-    name: Compile and test
+  compile_and_test_msrv:
+    name: Compile and test MSRV
     strategy:
       matrix:
         os: [ubuntu-latest, macos-latest, windows-latest]
-        toolchain: [1.60.0, stable, beta, nightly]
     runs-on: ${{ matrix.os }}
     env:
       RUSTFLAGS: -D warnings
     steps:
       - uses: actions/checkout@v3
-      - uses: dtolnay/rust-toolchain@master
+      - uses: dtolnay/rust-toolchain@1.60.0
         with:
-          toolchain: ${{ matrix.toolchain }}
-          targets: thumbv6m-none-eabi
+          components: clippy
       - name: Minimal check
-        run: cargo check -v -p palette --no-default-features --features std
+        run: cargo clippy -v -p palette --no-default-features --features std
       - name: find-crate check
-        run: cargo check -v -p palette --no-default-features --features "std find-crate"
+        run: cargo clippy -v -p palette --no-default-features --features "std find-crate"
       - name: Default check
-        run: cargo check -v --workspace --exclude no_std_test
-      - run: cargo test -v
-      - name: Test features
+        run: cargo clippy -v --workspace --exclude no_std_test
+      - name: Test all features
+        run: cargo test -v -p palette --all-features
+      - name: Test each feature
         shell: bash
         working-directory: palette
         run: bash ../scripts/test_features.sh
-      - name: "Test #[no_std]"
-        if: ${{ runner.os == 'Linux' && matrix.toolchain == 'nightly' }}
+  check_stable_beta_nightly:
+    name: Quick check
+    strategy:
+      matrix:
+        toolchain: [beta, stable, nightly]
+    runs-on: ubuntu-latest
+    env:
+      RUSTFLAGS: -D warnings
+    steps:
+      - uses: actions/checkout@v3
+      - uses: dtolnay/rust-toolchain@master
+        with:
+          toolchain: ${{ matrix.toolchain }}
+          components: clippy
+      - name: Check all features
+        run: cargo clippy -v -p palette --all-features
+  no_std:
+    name: "Test #[no_std]"
+    runs-on: ubuntu-latest
+    env:
+      RUSTFLAGS: -D warnings
+    steps:
+      - uses: actions/checkout@v3
+      - uses: dtolnay/rust-toolchain@nightly
+        with:
+          targets: thumbv6m-none-eabi
+      - name: "Build with #[no_std]"
         run: cargo build -v --package no_std_test --features nightly --target thumbv6m-none-eabi
   miri:
     name: Miri tests
@@ -61,7 +85,9 @@ jobs:
     name: ci
     if: success()
     needs:
-      - compile_and_test
+      - compile_and_test_msrv
+      - check_stable_beta_nightly
+      - no_std
       - miri
     runs-on: ubuntu-latest
     steps:

.github/workflows/coverage.yml

@@ -0,0 +1,32 @@
+on:
+  pull_request:
+    branches:
+      - master
+    paths:
+      - '**.rs'
+  push:
+    branches:
+      - master
+    paths:
+      - '**.rs'
+
+name: Test coverage
+
+jobs:
+  coverage:
+    runs-on: ubuntu-latest
+    env:
+      CARGO_TERM_COLOR: always
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
+      - uses: dtolnay/rust-toolchain@nightly
+      - uses: taiki-e/install-action@cargo-llvm-cov
+      - name: Collect code coverage
+        run: cargo +nightly llvm-cov --all-features --workspace --exclude no_std_test --codecov --doctests --output-path codecov.json
+      - name: Upload coverage to Codecov
+        uses: codecov/codecov-action@v3
+        with:
+          token: ${{ secrets.CODECOV_TOKEN }}
+          files: codecov.json

.vscode/settings.json

@@ -7,5 +7,6 @@
     ],
     "rust-analyzer.imports.granularity.enforce": true,
     "rust-analyzer.imports.granularity.group": "crate",
-    "rust-analyzer.imports.group.enable": true
-}
+    "rust-analyzer.imports.group.enable": true,
+    "rust-analyzer.check.command": "clippy"
+}

palette/Cargo.toml

@@ -25,6 +25,7 @@ edition = "2018"
 resolver = "2"
 categories = ["graphics", "multimedia::images", "no-std"]
 build = "build/main.rs"
+rust-version = "1.60.0"
 
 [features]
 default = ["named_from_str", "std", "approx"]

palette/benches/matrix.rs

@@ -36,7 +36,7 @@ fn matrix(c: &mut Criterion) {
         b.iter(|| matrix_inverse(*inverse))
     });
     group.bench_function("rgb_to_xyz_matrix", |b| {
-        b.iter(|| rgb_to_xyz_matrix::<encoding::Srgb, f32>())
+        b.iter(rgb_to_xyz_matrix::<encoding::Srgb, f32>)
     });
 }
 

palette/examples/blend.rs

@@ -45,7 +45,7 @@ fn main() {
                 &mut image,
                 x,
                 y,
-                0 * ALPHA_STEPS + alpha_step,
+                alpha_step,
                 tile_width,
                 tile_height,
                 foreground,
@@ -56,7 +56,7 @@ fn main() {
                 &mut image,
                 x,
                 y,
-                1 * ALPHA_STEPS + alpha_step,
+                ALPHA_STEPS + alpha_step,
                 tile_width,
                 tile_height,
                 Xyza::from_color(foreground),
@@ -72,6 +72,7 @@ fn main() {
     }
 }
 
+#[allow(clippy::too_many_arguments)]
 fn draw_composed_pixels<C>(
     image: &mut image::RgbaImage,
     x: u32,
@@ -106,11 +107,9 @@ fn draw_composed_pixels<C>(
     }
 }
 
-fn compose<C>(
-    fg: Alpha<C, f32>,
-    bg: Alpha<C, f32>,
-    function: fn(Alpha<C, f32>, Alpha<C, f32>) -> Alpha<C, f32>,
-) -> image::Rgba<u8>
+type ComposeFn<C> = fn(Alpha<C, f32>, Alpha<C, f32>) -> Alpha<C, f32>;
+
+fn compose<C>(fg: Alpha<C, f32>, bg: Alpha<C, f32>, function: ComposeFn<C>) -> image::Rgba<u8>
 where
     Alpha<C, f32>: Blend + IntoColor<LinSrgba>,
 {

palette/examples/color_scheme.rs

@@ -155,9 +155,9 @@ fn blit_shades(color: LinSrgb<f32>, mut canvas: SubImage<&mut RgbImage>) {
     let primary = Srgb::from_linear(color).into();
 
     //Generate one lighter and two darker versions of the color
-    let light = Srgb::from_linear(color.lighten(0.1).into()).into();
-    let dark1 = Srgb::from_linear(color.darken(0.1).into()).into();
-    let dark2 = Srgb::from_linear(color.darken(0.2).into()).into();
+    let light = Srgb::from_linear(color.lighten(0.1)).into();
+    let dark1 = Srgb::from_linear(color.darken(0.1)).into();
+    let dark2 = Srgb::from_linear(color.darken(0.2)).into();
 
     for x in 0..width {
         for y in 0..height {

palette/examples/compose.rs

@@ -56,7 +56,7 @@ fn main() {
                 &mut image,
                 x,
                 y,
-                0 * ALPHA_STEPS + alpha_step,
+                alpha_step,
                 tile_width,
                 tile_height,
                 foreground.into(),
@@ -67,7 +67,7 @@ fn main() {
                 &mut image,
                 x,
                 y,
-                1 * ALPHA_STEPS + alpha_step,
+                ALPHA_STEPS + alpha_step,
                 tile_width,
                 tile_height,
                 Xyza::from_color(foreground).into(),
@@ -127,6 +127,7 @@ fn main() {
     }
 }
 
+#[allow(clippy::too_many_arguments)]
 fn draw_composed_pixels<C>(
     image: &mut image::RgbaImage,
     x: u32,

palette/examples/readme_examples.rs

@@ -177,7 +177,7 @@ fn display_colors(filename: &str, displays: &[DisplayType]) {
 
     let mut image = RgbImage::new(WIDTH, displays.len() as u32 * row_height);
 
-    for (i, display) in displays.into_iter().enumerate() {
+    for (i, display) in displays.iter().enumerate() {
         let image = image.sub_image(0, i as u32 * row_height, WIDTH, row_height);
         match *display {
             DisplayType::Discrete(colors) => {

palette/src/alpha.rs

@@ -10,6 +10,7 @@ pub use self::alpha::*;
 #[doc(no_inline)]
 pub use crate::blend::PreAlpha; // Cross-link for visibility.
 
+#[allow(clippy::module_inception)]
 mod alpha;
 
 /// A trait for color types that can have or be given transparency (alpha channel).

palette/src/blend.rs

@@ -50,6 +50,7 @@ pub use self::{
     pre_alpha::PreAlpha,
 };
 
+#[allow(clippy::module_inception)]
 mod blend;
 mod blend_with;
 mod compose;

palette/src/blend/equations.rs

@@ -109,8 +109,8 @@ where
                 .apply_to(source.clone(), destination.clone());
 
             (
-                alpha_src_param.mul_constant(source.alpha.clone()),
-                alpha_dst_param.mul_constant(destination.alpha.clone()),
+                alpha_src_param.mul_constant(source.alpha),
+                alpha_dst_param.mul_constant(destination.alpha),
             )
         };
 

palette/src/cast/from_into_components_traits.rs

@@ -581,7 +581,7 @@ where
     }
 }
 
-impl<'a, T, C> TryComponentsInto<C> for T
+impl<T, C> TryComponentsInto<C> for T
 where
     C: TryFromComponents<T>,
 {

palette/src/color_difference.rs

@@ -463,11 +463,12 @@ mod test {
         assert!(c1.has_enhanced_contrast_text(white));
         assert!(c1.has_enhanced_contrast_large_text(white));
         assert!(c1.has_min_contrast_graphics(white));
-        assert!(c1.has_min_contrast_text(black) == false);
-        assert!(c1.has_min_contrast_large_text(black) == false);
-        assert!(c1.has_enhanced_contrast_text(black) == false);
-        assert!(c1.has_enhanced_contrast_large_text(black) == false);
-        assert!(c1.has_min_contrast_graphics(black) == false);
+
+        assert!(!c1.has_min_contrast_text(black));
+        assert!(!c1.has_min_contrast_large_text(black));
+        assert!(!c1.has_enhanced_contrast_text(black));
+        assert!(!c1.has_enhanced_contrast_large_text(black));
+        assert!(!c1.has_min_contrast_graphics(black));
 
         let c1 = Srgb::from_str("#066").unwrap().into_format();
 

palette/src/convert.rs

@@ -196,19 +196,17 @@
 //!     }
 //! }
 //!
-//! fn main() {
-//!     // Start with an Xyz100 color.
-//!     let xyz = Xyz100 {
-//!         x: 59,
-//!         y: 75,
-//!         z: 42,
-//!     };
+//! // Start with an Xyz100 color.
+//! let xyz = Xyz100 {
+//!     x: 59,
+//!     y: 75,
+//!     z: 42,
+//! };
 //!
-//!     // Convert the color to sRGB.
-//!     let rgb: Srgb = xyz.into_color();
+//! // Convert the color to sRGB.
+//! let rgb: Srgb = xyz.into_color();
 //!
-//!     assert_eq!(rgb.into_format(), Srgb::new(196u8, 238, 154));
-//! }
+//! assert_eq!(rgb.into_format(), Srgb::new(196u8, 238, 154));
 //! ```
 //!
 //! With generic components:

palette/src/convert/from_into_color_mut.rs

@@ -200,6 +200,7 @@ where
     ///
     /// This reuses the memory space, and the returned scope guard will restore
     /// the converted colors to their original type when it's dropped.
+    #[allow(clippy::wrong_self_convention)]
     #[must_use]
     fn into_color_mut(&mut self) -> FromColorMutGuard<T, Self>;
 }
@@ -308,7 +309,7 @@ where
             .and_then(|mut guard| guard.current.take());
 
         if let Some(restored) = restored {
-            return restored;
+            restored
         } else {
             unreachable!()
         }

palette/src/convert/from_into_color_unclamped_mut.rs

@@ -201,6 +201,7 @@ where
     ///
     /// This reuses the memory space, and the returned scope guard will restore
     /// the converted colors to their original type when it's dropped.
+    #[allow(clippy::wrong_self_convention)]
     #[must_use]
     fn into_color_unclamped_mut(&mut self) -> FromColorUnclampedMutGuard<T, Self>;
 }

palette/src/convert/try_from_into_color.rs

@@ -64,7 +64,6 @@ pub trait TryFromColor<T>: Sized {
     ///     }
     /// };
     /// ```
-    #[must_use]
     fn try_from_color(t: T) -> Result<Self, OutOfBounds<Self>>;
 }
 
@@ -105,7 +104,6 @@ pub trait TryIntoColor<T>: Sized {
     ///     }
     /// };
     /// ```
-    #[must_use]
     fn try_into_color(self) -> Result<T, OutOfBounds<T>>;
 }