--input -i cli args

bin/index.js

@@ -1,20 +1,29 @@
 #!/usr/bin/env node
 
+const argdef = [
+	{name: 'input', alias: 'i', type: String, defaultOption: true},
+]
+
 import stopwatch from 'statman-stopwatch'
+import args from 'command-line-args'
 import {Interpret} from '../interpreter.js'
-	import {Lexer} from '../lexer.js'
-	import {Parse} from '../parser.js'
-	import * as fs from 'fs'
+import {Lexer} from '../lexer.js'
+import {Parse} from '../parser.js'
+import * as fs from 'fs'
 
 export default function runner() {
-	const timer = new stopwatch(true)
-	let program = process.argv[2]
+	try {
+		const timer =  new stopwatch(true)
+		const options =  args(argdef)
 
-	if (!program) process.exit(1)
+		if (!options.input) process.exit(1)
 
-	let tokens = Lexer(fs.readFileSync(program).toString())
-	let script = Parse(tokens)
-	Interpret(script, false)
-	console.log("Executed in " + Math.floor(timer.stop()) + " ms")
+		let tokens =  Lexer(fs.readFileSync(options.input).toString())
+		let script =  Parse(tokens)
+		Interpret(script, false)
+		console.log("Executed in " + Math.floor(timer.stop()) + " ms")
+	} catch(err) {
+		console.log("Invalid argument")
+	}
 }
 runner()

package.json

@@ -21,6 +21,7 @@
     "bin": "0.0.0",
     "caxa": "^2.1.0",
     "chalk": "^4.1.2",
+    "command-line-args": "^5.2.0",
     "fifo": "^2.4.1",
     "math.js": "^1.1.46",
     "mathjs": "^10.0.2",