Add basic rust wrapper

Author: mbj

.github/workflows/ci.yml

@@ -10,6 +10,36 @@ jobs:
     - uses: actions/checkout@v4
     - name: Check Whitespace
       run: git diff --check -- HEAD~1
+  rust-build:
+    strategy:
+      matrix:
+        os:
+          - runner: ubuntu-latest
+            arch: x86_64
+          - runner: ubuntu-24.04-arm
+            arch: aarch64
+          - runner: macos-15
+            arch: aarch64
+    name: Rust Build (${{ matrix.os.runner }}-${{ matrix.os.arch }})
+    runs-on: ${{ matrix.os.runner }}
+    steps:
+    - uses: actions/checkout@v4
+    - uses: actions/cache@v4
+      with:
+        path: |
+          target/
+          ~/.cargo/bin/
+          ~/.cargo/git/db/
+          ~/.cargo/registry/cache/
+          ~/.cargo/registry/index/
+          ~/.rustup
+        key: ${{ matrix.os.runner }}-${{ matrix.os.arch }}-rust-${{ hashFiles('.github/workflows/ci.yml', 'Cargo.lock', 'rust-toolchain.yaml') }}
+    - name: Run fmt
+      run: cargo fmt --check
+    - name: Build release
+      run: cargo build --release
+    - name: Run clippy
+      run: cargo clippy --release
   ruby-spec:
     name: Unit Specs
     runs-on: ${{ matrix.os }}

.gitignore

@@ -1,3 +1,4 @@
 /.bundle
+/Cargo.lock
+/target
 /tmp
-/.bundle

Cargo.toml

@@ -0,0 +1,3 @@
+[workspace]
+resolver = "2"
+members = ["mutant"]

mutant/Cargo.toml

@@ -0,0 +1,21 @@
+[package]
+name = "mutant"
+version = "0.13.9"
+edition = "2021"
+authors = ["Markus Schirp <[email protected]>"]
+license = "Nonstandard"
+description = "Mutation Testing"
+homepage = "https://github.com/mbj/mutant"
+repository = "https://github.com/mbj/mutant"
+readme = "../README.md"
+
+[[bin]]
+name = "mutant"
+path = "src/main.rs"
+
+[dependencies]
+clap = { version = "4.5", features = ["derive"] }
+log = "0.4"
+env_logger = "0.11"
+
+[dev-dependencies]

mutant/src/main.rs

@@ -0,0 +1,31 @@
+use log::warn;
+use std::env;
+use std::os::unix::process::CommandExt;
+use std::process::Command;
+
+fn main() {
+    env_logger::Builder::from_default_env()
+        .filter_level(log::LevelFilter::Warn)
+        .init();
+
+    let args: Vec<String> = env::args().collect();
+
+    // For now, always delegate to Ruby with a warning
+    warn!("Rust wrapper did not handle this command yet, delegating to Ruby implementation");
+
+    exec_ruby_mutant(&args[1..]);
+}
+
+fn exec_ruby_mutant(args: &[String]) {
+    env::set_current_dir("ruby").unwrap_or_else(|error| {
+        panic!("Failed to change to ruby directory: {}", error);
+    });
+
+    let error = Command::new("bundle")
+        .arg("exec")
+        .arg("mutant")
+        .args(args)
+        .exec();
+
+    panic!("Failed to execute Ruby mutant: {}", error);
+}

rust-toolchain.yaml

@@ -0,0 +1,4 @@
+[toolchain]
+channel = "1.91.1"
+components = ["rustfmt", "clippy"]
+targets = ["x86_64-unknown-linux-musl", "aarch64-unknown-linux-musl"]