cargo-benchcmp: init at 0.4.4

https://github.com/BurntSushi/cargo-benchcmp

pkgs/development/tools/rust/cargo-benchcmp/default.nix

···
+{ lib
+, rustPlatform
+, fetchFromGitHub
+, substituteAll
+, rust
+, stdenv
+}:
+
+rustPlatform.buildRustPackage rec {
+  pname = "cargo-benchcmp";
+  version = "0.4.4";
+
+  src = fetchFromGitHub {
+    owner = "BurntSushi";
+    repo = "cargo-benchcmp";
+    rev = version;
+    hash = "sha256-pg3/VUC1DQ7GbSQDfVZ0WNisXvzXy0O0pr2ik2ar2h0=";
+  };
+
+  cargoHash = "sha256-vxy9Ym3Twx034I1E5fWNnbP1ttfLolMbO1IgRiPfhRw=";
+
+  patches = [
+    # patch the binary path so tests can find the binary when `--target` is present
+    (substituteAll {
+      src = ./fix-test-binary-path.patch;
+      shortTarget = rust.toRustTarget stdenv.hostPlatform;
+    })
+  ];
+
+  checkFlags = [
+    # thread 'different_input_colored' panicked at 'assertion failed: `(left == right)`
+    "--skip=different_input_colored"
+  ];
+
+  meta = with lib; {
+    description = "A small utility to compare Rust micro-benchmarks";
+    homepage = "https://github.com/BurntSushi/cargo-benchcmp";
+    license = with licenses; [ mit unlicense ];
+    maintainers = with maintainers; [ figsoda ];
+  };
+}

pkgs/development/tools/rust/cargo-benchcmp/fix-test-binary-path.patch

···
+--- a/tests/integration.rs
++++ b/tests/integration.rs
+@@ -16,20 +16,13 @@ impl CommandUnderTest {
+     fn new() -> CommandUnderTest {
+         // To find the directory where the built binary is, we walk up the directory tree of the test binary until the
+         // parent is "target/".
+-        let mut binary_path = env::current_exe().expect("need current binary path to find binary to test");
+-        loop {
+-            {
+-                let parent = binary_path.parent();
+-                if parent.is_none() {
+-                    panic!("Failed to locate binary path from original path: {:?}", env::current_exe());
+-                }
+-                let parent = parent.unwrap();
+-                if parent.is_dir() && parent.file_name().unwrap() == "target" {
+-                    break;
+-                }
+-            }
+-            binary_path.pop();
+-        }
++        let mut binary_path = PathBuf::from(
++            env::current_dir()
++                .unwrap()
++                .join("target")
++                .join("@shortTarget@")
++                .join(env!("cargoBuildType")),
++        );
+ 
+         binary_path.push(
+             if cfg!(target_os = "windows") {

pkgs/top-level/all-packages.nix

···
   cargo-audit = callPackage ../development/tools/rust/cargo-audit {
     inherit (darwin.apple_sdk.frameworks) Security;
   };
+  cargo-benchcmp = callPackage ../development/tools/rust/cargo-benchcmp { };
   cargo-binstall = callPackage ../development/tools/rust/cargo-binstall { };
   cargo-bisect-rustc = callPackage ../development/tools/rust/cargo-bisect-rustc {
     inherit (darwin.apple_sdk.frameworks) Security;