First commit of working code.

src/main.rs

@@ -0,0 +1,34 @@
+mod debug;
+
+use std::error::Error;
+use clap::Parser;
+use befunge::Funge;
+use debug::FungeView;
+
+
+#[derive(Parser)]
+#[command(version)]
+struct Args {
+    #[arg(id = "funge code file")]
+    input: String,
+    #[arg(help = "debug, step on key press or steps / second",
+          short, long, value_name = "interval", num_args = 0..=1)]
+    debug: Option<Option<f64>>,
+    #[arg(id = "arguments to the funge (& or ~)")]
+    arguments: Vec<String>,
+}
+
+
+fn main() -> Result<(), Box<dyn Error>> {
+    let args = Args::parse();
+    let mut funge = Funge::from_file(&args.input)?;
+    if args.arguments.len() > 0 {
+        funge = funge.with_inputs(args.arguments)?;
+    }
+
+    match args.debug {
+        Some(interval) => FungeView::new(funge)?.debug(interval)?,
+        None => { funge.run()?; }
+    }
+    Ok(())
+}