Improve CI (#57)

* Improve CI

* Test caching

* Fix cache

* No tests for now

* Test cache

.github/workflows/ci.yml

@@ -6,39 +6,39 @@ on:
     branches: ["main"]
 env:
   CARGO_TERM_COLOR: always
-  # These few env vars help reduce disk usage without complexity
   CARGO_INCREMENTAL: 0
-  RUSTFLAGS: "-C debuginfo=0"
+
 jobs:
   build:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - name: Cache dependencies
-        uses: actions/cache@v3
-        with:
-          path: |
-            ~/.cargo/registry
-            ~/.cargo/git
-            target
-          key: ${{ runner.os }}-cargo-${{ hashFiles('**/Cargo.lock') }}
-          restore-keys: |
-            ${{ runner.os }}-cargo-
-      - name: Install system dependencies
-        run: |
-          sudo apt-get update
-          sudo apt-get install -y --no-install-recommends libatk1.0-dev libgtk-3-dev build-essential
+
+      # selecting a toolchain either by action or manual `rustup` calls should happen
+      # before the plugin, as the cache uses the current rustc version as its cache key
       - name: Install Rust toolchain
         uses: dtolnay/rust-toolchain@master
         with:
           toolchain: stable
           targets: wasm32-unknown-unknown, aarch64-linux-android
           components: rustfmt, clippy
-      - name: Build and run checks
+
+      - name: Install system dependencies
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y --no-install-recommends libatk1.0-dev libgtk-3-dev build-essential
+
+      - name: Cache
+        uses: Swatinem/rust-cache@v2
+
+      # Split into separate jobs for parallelization
+      - name: Build
         run: |
           cargo build --all-features --verbose
           cargo build --target wasm32-unknown-unknown --verbose
-          cargo clippy --all-targets --all-features -- -D warnings
-          cargo test --all-features --verbose
-      - name: Check formatting
-        run: cargo fmt -- --check
+
+      - name: Lint
+        run: cargo clippy --all-targets --all-features -- -D warnings
+
+      - name: Check format
+        run: cargo fmt -- --check

crates/brush-render/src/lib.rs

@@ -120,4 +120,5 @@ pub trait AutodiffBackend:
     Backend + burn::tensor::backend::AutodiffBackend<InnerBackend: Backend>
 {
 }
+
 type InnerWgpu = JitBackend<WgpuRuntime, f32, i32, u32>;

crates/brush-train/src/scene.rs

@@ -1,7 +1,6 @@
-use std::sync::Arc;
-
 use brush_render::{bounding_box::BoundingBox, camera::Camera};
 use glam::Vec3;
+use std::sync::Arc;
 
 #[derive(Debug, PartialEq, Eq, Clone, Copy)]
 pub enum ViewType {