diff --git a/Cargo.lock b/Cargo.lock
index 85a0414..04fa921 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -737,6 +737,7 @@ dependencies = [
  "tokio",
  "tower-lsp",
  "unicode-segmentation",
+ "walkdir",
 ]
 
 [[package]]
diff --git a/Cargo.toml b/Cargo.toml
index 3858a37..f6884a8 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -36,3 +36,4 @@ tokio = { version = "1.38.1", features = ["macros", "rt-multi-thread", "io-std"]
 
 tower-lsp = "0.20.0"
 unicode-segmentation = "1.11.0"
+walkdir = "2.5.0"
diff --git a/src/compiler/compiler.rs b/src/compiler/compiler.rs
index 7d8f3f8..a36b89f 100644
--- a/src/compiler/compiler.rs
+++ b/src/compiler/compiler.rs
@@ -18,6 +18,7 @@ pub enum Target {
 pub struct Compiler {
 	target: Target,
 	cache: Option<RefCell<Connection>>,
+	// TODO:
 	reference_count: RefCell<HashMap<String, HashMap<String, usize>>>,
 }
 
diff --git a/src/main.rs b/src/main.rs
index badbc34..d00b9bc 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -7,18 +7,20 @@ mod lua;
 mod parser;
 
 use std::env;
+use std::process::ExitCode;
 use std::rc::Rc;
 
 use compiler::compiler::Compiler;
 use getopts::Options;
 use parser::langparser::LangParser;
 use parser::parser::Parser;
+use walkdir::WalkDir;
 
 use crate::parser::source::SourceFile;
 extern crate getopts;
 
 fn print_usage(program: &str, opts: Options) {
-	let brief = format!("Usage: {} -i FILE [options]", program);
+	let brief = format!("Usage: {} -i PATH -o PATH [options]", program);
 	print!("{}", opts.usage(&brief));
 }
 
@@ -36,42 +38,15 @@ NML version: 0.4\n"
 	);
 }
 
-fn main() {
-	let args: Vec<String> = env::args().collect();
-	let program = args[0].clone();
-
-	let mut opts = Options::new();
-	opts.optopt("i", "", "Input file", "FILE");
-	opts.optopt("d", "database", "Cache database location", "PATH");
-	opts.optmulti("z", "debug", "Debug options", "OPTS");
-	opts.optflag("h", "help", "Print this help menu");
-	opts.optflag("v", "version", "Print program version and licenses");
-
-	let matches = match opts.parse(&args[1..]) {
-		Ok(m) => m,
-		Err(f) => {
-			panic!("{}", f.to_string())
-		}
-	};
-	if matches.opt_present("v") {
-		print_version();
-		return;
-	}
-	if matches.opt_present("h") {
-		print_usage(&program, opts);
-		return;
-	}
-	if !matches.opt_present("i") {
-		print_usage(&program, opts);
-		return;
-	}
-
-	let input = matches.opt_str("i").unwrap();
-	let debug_opts = matches.opt_strs("z");
-	let db_path = matches.opt_str("d");
-
-	let parser = LangParser::default();
-
+fn process(
+	parser: &LangParser,
+	db_path: &Option<String>,
+	input: &String,
+	output: &String,
+	debug_opts: &Vec<String>,
+	multi_mode: bool,
+) -> bool {
+	println!("Processing {input}...");
 	// Parse
 	let source = SourceFile::new(input.to_string(), None).unwrap();
 	let doc = parser.parse(Rc::new(source), None);
@@ -104,11 +79,146 @@ fn main() {
 
 	if parser.has_error() {
 		println!("Compilation aborted due to errors while parsing");
-		return;
+		return false;
 	}
 
-	let compiler = Compiler::new(compiler::compiler::Target::HTML, db_path);
-	let out = compiler.compile(doc.as_ref());
+	let compiler = Compiler::new(compiler::compiler::Target::HTML, db_path.clone());
 
-	std::fs::write("a.html", out).unwrap();
+	// Get output from file
+	if multi_mode {
+		let out_file = match doc.get_variable("compiler.output") {
+			None => {
+				eprintln!("Missing required variable `compiler.output` for multifile mode");
+				return false;
+			}
+			Some(var) => output.clone() + "/" + var.to_string().as_str(),
+		};
+
+		let out = compiler.compile(doc.as_ref());
+		std::fs::write(out_file, out).is_ok()
+	} else {
+		let out = compiler.compile(doc.as_ref());
+		std::fs::write(output, out).is_ok()
+	}
+}
+
+fn main() -> ExitCode {
+	let args: Vec<String> = env::args().collect();
+	let program = args[0].clone();
+
+	let mut opts = Options::new();
+	opts.optopt("i", "input", "Input path", "PATH");
+	opts.optopt("o", "output", "Output path", "PATH");
+	opts.optopt("d", "database", "Cache database location", "PATH");
+	opts.optmulti("z", "debug", "Debug options", "OPTS");
+	opts.optflag("h", "help", "Print this help menu");
+	opts.optflag("v", "version", "Print program version and licenses");
+
+	let matches = match opts.parse(&args[1..]) {
+		Ok(m) => m,
+		Err(f) => {
+			panic!("{}", f.to_string())
+		}
+	};
+	if matches.opt_present("v") {
+		print_version();
+		return ExitCode::SUCCESS;
+	}
+	if matches.opt_present("h") {
+		print_usage(&program, opts);
+		return ExitCode::SUCCESS;
+	}
+	if !matches.opt_present("i") || !matches.opt_present("o") {
+		print_usage(&program, opts);
+		return ExitCode::FAILURE;
+	}
+
+	let input = matches.opt_str("i").unwrap();
+	let input_meta = match std::fs::metadata(&input) {
+		Ok(meta) => meta,
+		Err(e) => {
+			eprintln!("Unable to get metadata for input: `{input}`");
+			return ExitCode::FAILURE;
+		}
+	};
+	let output = matches.opt_str("o").unwrap();
+	if input_meta.is_dir() {
+		// Create ouput directories
+		if !std::fs::exists(&output).unwrap_or(false) {
+			match std::fs::create_dir_all(&output) {
+				Ok(()) => {}
+				Err(err) => {
+					eprintln!("Unable to create output directory `{output}`: {err}");
+					return ExitCode::FAILURE;
+				}
+			}
+		}
+		match std::fs::metadata(&output) {
+			Ok(_) => {}
+			Err(e) => {
+				eprintln!("Unable to get metadata for output: `{output}`");
+				return ExitCode::FAILURE;
+			}
+		}
+	}
+
+	let debug_opts = matches.opt_strs("z");
+	let db_path = matches.opt_str("d");
+	let parser = LangParser::default();
+
+	if input_meta.is_dir() {
+		if db_path.is_none() {
+			eprintln!("Please specify a database (-d) for directory mode.");
+		}
+
+		let input_it = match std::fs::read_dir(&input) {
+			Ok(it) => it,
+			Err(e) => {
+				eprintln!("Failed to read input directory `{input}`: {e}");
+				return ExitCode::FAILURE;
+			}
+		};
+
+		for entry in WalkDir::new(&input) {
+			if let Err(err) = entry {
+				eprintln!("Failed to recursively walk over input directory: {err}");
+				return ExitCode::FAILURE;
+			}
+			match entry.as_ref().unwrap().metadata() {
+				Ok(meta) => {
+					if !meta.is_file() {
+						continue;
+					}
+				}
+				Err(e) => {
+					eprintln!("Faield to get metadata for `{entry:#?}`");
+					return ExitCode::FAILURE;
+				}
+			}
+
+			let path = match entry.as_ref().unwrap().path().to_str() {
+				Some(path) => path.to_string(),
+				None => {
+					eprintln!("Faield to convert input file `{entry:#?}` to UTF-8");
+					return ExitCode::FAILURE;
+				}
+			};
+			if !path.ends_with(".nml") {
+				println!("Skipping '{path}'");
+				continue;
+			}
+
+			if !process(&parser, &db_path, &path, &output, &debug_opts, true) {
+				eprintln!("Processing aborted");
+				return ExitCode::FAILURE;
+			}
+		}
+	} else {
+		if !process(&parser, &db_path, &input, &output, &debug_opts, false) {
+			eprintln!("Processing aborted");
+			return ExitCode::FAILURE;
+		}
+	}
+
+	return ExitCode::SUCCESS;
 }
diff --git a/src/parser/langparser.rs b/src/parser/langparser.rs
index 6d07cdf..0cc569d 100644
--- a/src/parser/langparser.rs
+++ b/src/parser/langparser.rs
@@ -144,7 +144,7 @@ impl Parser for LangParser {
 				})
 				.unwrap();
 
-			paragraph.push(elem);
+			paragraph.push(elem).unwrap();
 		} else {
 			// Process paragraph events
 			if doc.last_element::<Paragraph>().is_some_and(|_| true) {