Restructure and compartmentalize the project

codegen/luajit/src/bin/wasm2luajit.rs

@@ -0,0 +1,34 @@
+use std::io::{Result, Write};
+
+use parity_wasm::{deserialize_file, elements::Module};
+
+fn load_module(name: &str) -> Module {
+	deserialize_file(name)
+		.expect("Failed to parse WebAssembly file")
+		.parse_names()
+		.unwrap_or_else(|v| v.1)
+}
+
+fn do_runtime(lock: &mut dyn Write) -> Result<()> {
+	let runtime = codegen_luajit::RUNTIME;
+
+	writeln!(lock, "local rt = (function()")?;
+	writeln!(lock, "{runtime}")?;
+	writeln!(lock, "end)()")
+}
+
+fn main() -> Result<()> {
+	let wasm = match std::env::args().nth(1) {
+		Some(name) => load_module(&name),
+		None => {
+			eprintln!("usage: wasm2luajit <file>");
+
+			return Ok(());
+		}
+	};
+
+	let lock = &mut std::io::stdout().lock();
+
+	do_runtime(lock)?;
+	codegen_luajit::from_module_untyped(&wasm, lock)
+}