Add rust-script to Rust interpreters

lib/linguist/languages.yml

@@ -6013,6 +6013,8 @@ Rust:
   ace_mode: rust
   codemirror_mode: rust
   codemirror_mime_type: text/x-rustsrc
+  interpreters:
+  - rust-script
   language_id: 327
 SAS:
   type: programming

samples/Rust/base64url

@@ -0,0 +1,33 @@
+#!/usr/bin/env rust-script
+//! ```cargo
+//! [dependencies]
+//! base64-url = "1.1"
+//! ```
+
+use std::env;
+use std::io;
+use std::io::{Read, Write};
+
+fn main() -> io::Result<()> {
+    let args: Vec<String> = env::args().collect();
+    if args.len() != 2 || (args[1] != "decode" && args[1] != "encode") {
+        println!("Error: Specify either 'decode' or 'encode' as first and only argument");
+        ::std::process::exit(1);
+    }
+
+    if args[1] == "decode" {
+        let mut buffer = String::new();
+        io::stdin().read_to_string(&mut buffer)?;
+        let decoded = base64_url::decode(&buffer).expect("Error decoding");
+        io::stdout().write(&decoded).unwrap();
+        io::stdout().flush().unwrap();
+        println!("");
+    } else {
+        let mut buffer = String::new();
+        io::stdin().read_to_string(&mut buffer)?;
+        let encoded = base64_url::encode(&buffer);
+        println!("{}", encoded);
+    }
+
+    Ok(())
+}