introduce rust

src/cmd/version.rs

@@ -0,0 +1,12 @@
+pub fn run() {
+    println!("{}", version_string());
+}
+
+pub fn version_string() -> String {
+    format!(
+        "Direktil {} v{} (git commit {})",
+        env!("CARGO_PKG_NAME"),
+        env!("CARGO_PKG_VERSION"),
+        env!("GIT_COMMIT")
+    )
+}