build(nix): add cargo-llvm-cov

.gitignore

@@ -1,9 +1,12 @@
+# Build and test artifacts.
 /target
 *.sqlite*
 *.key
+*.profraw
+result
+result-*
 
+# Test configurations.
 config.toml
 /test-frontend/default.json
 /test-frontend/.well-known
-result
-result-*

flake.nix

@@ -97,7 +97,10 @@ rec {
         {
           default = pkgs.mkShell {
             inputsFrom = [ self.packages.${system}.default ];
-            nativeBuildInputs = [ pkgs.buildPackages.sqlite-interactive ];
+            nativeBuildInputs = [
+              pkgs.buildPackages.sqlite-interactive
+              pkgs.cargo-llvm-cov
+            ];
 
             env.RUST_LOG = "blahd=debug,blahctl=debug";
           };

rust-toolchain.toml

@@ -5,3 +5,4 @@
 [toolchain]
 channel = "beta-2024-09-10" # 1.82.0-beta.3
 profile = "default"
+components = ["llvm-tools"]