Harden macOS host target checks

Author: eldryoth

scripts/check_macos.sh

@@ -33,20 +33,9 @@ if [ "$machine" = "x86_64" ] && [ "$host" != "x86_64-apple-darwin" ]; then
     exit 1
 fi
 
-echo "macOS checks: host test default features"
-rustup run "$toolchain" cargo test --all-targets
-
-echo "macOS checks: host test all features"
-rustup run "$toolchain" cargo test --all-targets --all-features
-
-echo "macOS checks: host check no_std library"
-rustup run "$toolchain" cargo check --no-default-features --lib
-
-echo "macOS checks: host test no default features"
-rustup run "$toolchain" cargo test --no-default-features --all-targets
-
-echo "macOS checks: host clippy all features"
-rustup run "$toolchain" cargo clippy --all-targets --all-features -- -D warnings
+if [ -n "${CARGO_BUILD_TARGET:-}" ]; then
+    echo "macOS checks: CARGO_BUILD_TARGET=$CARGO_BUILD_TARGET is set; host checks force --target $host"
+fi
 
 for target in aarch64-apple-darwin x86_64-apple-darwin; do
     if ! rustup target list --installed --toolchain "$toolchain" | grep -qx "$target"; then
@@ -60,7 +49,24 @@ for target in aarch64-apple-darwin x86_64-apple-darwin; do
         rustup target list --installed --toolchain "$toolchain" >&2
         exit 1
     fi
+done
 
+echo "macOS checks: host test default features"
+rustup run "$toolchain" cargo test --target "$host" --all-targets
+
+echo "macOS checks: host test all features"
+rustup run "$toolchain" cargo test --target "$host" --all-targets --all-features
+
+echo "macOS checks: host check no_std library"
+rustup run "$toolchain" cargo check --target "$host" --no-default-features --lib
+
+echo "macOS checks: host test no default features"
+rustup run "$toolchain" cargo test --target "$host" --no-default-features --all-targets
+
+echo "macOS checks: host clippy all features"
+rustup run "$toolchain" cargo clippy --target "$host" --all-targets --all-features -- -D warnings
+
+for target in aarch64-apple-darwin x86_64-apple-darwin; do
     echo "macOS checks: target compile all features for $target"
     rustup run "$toolchain" cargo check --target "$target" --all-features --lib