index.js

#!/usr/bin/env node

import tokenize from "./src/lex.js";
import Parser from "./src/parser.js";
import Preprocessor from "./src/preprocess.js";
import { readFileSync, writeFileSync } from "fs";
import { run_command } from "./src/utils.js";
import { ArgumentParser } from "argparse";
import { fileURLToPath } from 'url';
import path from "path";
import process from "process";

const __filename = fileURLToPath(import.meta.url);
const __dirname = path.dirname(__filename);

const parser = new ArgumentParser({
    description: "The Official Gerbile Compiler OwO"
});
parser.add_argument("-v", "--version", { action: "version", version: "1.0.0" });
parser.add_argument("-t", "--show-tokens", { action: "store_true", dest: "tokens", help: "Output tokens generated by lexer"});
parser.add_argument("-a", "--show-asm", { action: "store_true", dest: "asm", help: "Output assembly generated by parser"});
parser.add_argument("-r", "--run", { action: "store_true", dest: "run", help: "Run executable after compilation"});
parser.add_argument("SRC_FILE", {help: "Path to source file"});
parser.add_argument("OUT_FILE", {help: "Path to output final executable"});
let args = parser.parse_args();

let text = readFileSync(args.SRC_FILE, {encoding:"utf8", flag:"r"}, (err, data) => {
	if (err) console.error(err);
})

let toks = tokenize(path.normalize(args.SRC_FILE), text);
if (args.tokens) console.log(toks);

let preproc = new Preprocessor(__dirname);
toks = preproc.process(toks, args.SRC_FILE);

let asm_gen = new Parser(__dirname);
let asm = asm_gen.generate(toks, args.SRC_FILE);
if (args.asm) console.log(asm);

writeFileSync(`${args.SRC_FILE}.asm`, asm, (err) => {
	if (err) console.error(err);
});

let exit_code = run_command("fasm", [`${args.SRC_FILE}.asm`, args.OUT_FILE]);
if (exit_code === 0) {
    exit_code = run_command("chmod", ["+x", args.OUT_FILE]);
}
if (args.run && exit_code === 0) {
    run_command(`./${args.OUT_FILE}`, [], {code: true});
}