feat(xatu): scaffold project

Add the Xatu Rust package as a minimal hello-world skeleton with Cargo workspace metadata and Bazel library, binary, and test targets.

src/xatu/BUILD

@@ -0,0 +1,20 @@
+load("@rules_rust//rust:defs.bzl", "rust_binary", "rust_library", "rust_test")
+
+rust_library(
+    name = "xatu_lib",
+    crate_name = "xatu",
+    srcs = ["lib.rs"],
+)
+
+rust_binary(
+    name = "xatu",
+    crate_name = "xatu_cli",
+    srcs = ["main.rs"],
+    deps = [":xatu_lib"],
+)
+
+rust_test(
+    name = "lib_test",
+    srcs = ["lib_test.rs"],
+    deps = [":xatu_lib"],
+)

src/xatu/Cargo.toml

@@ -0,0 +1,13 @@
+[package]
+name = "xatu"
+version = "0.1.0"
+edition = "2024"
+
+[lib]
+path = "lib.rs"
+
+[[bin]]
+name = "xatu"
+path = "main.rs"
+
+[dependencies]

src/xatu/lib.rs

@@ -0,0 +1,5 @@
+pub const GREETING: &str = "Hello from Xatu";
+
+pub fn greeting() -> &'static str {
+    GREETING
+}

src/xatu/lib_test.rs

@@ -0,0 +1,4 @@
+#[test]
+fn greeting_returns_hello_message() {
+    assert_eq!(xatu::greeting(), "Hello from Xatu");
+}

src/xatu/main.rs

@@ -0,0 +1,3 @@
+fn main() {
+    println!("{}", xatu::greeting());
+}