Add clippy features matrix

Run clippy on all available feature combos.

.github/workflows/build.yml

@@ -112,6 +112,14 @@ jobs:
 
   clippy:
     name: "Clippy"
+    strategy:
+      matrix:
+        features: [
+          "",
+          "noserial",
+          "qemu",
+          "noserial,qemu",
+        ]
     runs-on: ubuntu-latest
     timeout-minutes: 10
     steps:
@@ -119,4 +127,4 @@ jobs:
     - run: rustup toolchain install nightly --profile minimal --component clippy
     - run: rustup component add rust-src llvm-tools-preview
     - run: cargo install cargo-make
-    - run: cargo make clippy
+    - run: env CLIPPY_FEATURES=${{ matrix.features }} cargo make clippy

nucleus/Makefile.toml

@@ -68,8 +68,9 @@ command = "diskutil"
 args = ["unmount", "/Volumes/BOOT/"]
 
 [tasks.clippy]
+env = { "TARGET_FEATURES" = { value = "--features=${CLIPPY_FEATURES}", condition = { env_set = ["CLIPPY_FEATURES"] } } }
 command = "cargo"
-args = ["clippy", "${BUILD_STD}", "--target=${TARGET_JSON}", "--", "-D", "warnings"]
+args = ["clippy", "${BUILD_STD}", "--target=${TARGET_JSON}", "@@remove-empty(TARGET_FEATURES)", "--", "-D", "warnings"]
 
 [tasks.hopper]
 dependencies = ["build", "kernel-binary"]