Pick this up again, dust it off, get some stuff connected.

src/bin.rs

@@ -1,3 +1,29 @@
-fn main() {
-    println!("Hello, world!");
+use clap::Parser;
+use ngr::syntax::{ParserError, Program};
+
+#[derive(Parser, Debug)]
+#[clap(author, version, about, long_about = None)]
+struct CommandLineArguments {
+    /// Optional output file name
+    #[clap(short, long)]
+    output: Option<String>,
+
+    /// The file to parse
+    file: String
+}
+
+fn real_main() -> Result<(), ParserError> {
+    let args = CommandLineArguments::parse();
+
+    let program = Program::from_file(&args.file)?;
+    println!("args: {:?}", args);
+    println!("program: {:?}", program);
+
+    Ok(())
+}
+
+fn main() {
+    if let Err(e) = real_main() {
+        println!("{}", e);
+    }
 }