tweak example.js 📝

example.js

@@ -1,9 +1,10 @@
 #!/usr/bin/env node
 'use strict'
 
-const {join} = require('path')
+const {resolve} = require('path')
 const shell = require('any-shell-escape')
 const {exec} = require('child_process')
+const pathToFfmpeg = require('.')
 
 const argv = process.argv.slice(2)
 if (argv.includes('-h') || argv.includes('--help')) {
@@ -12,18 +13,30 @@ This is just a simple CLI wrapper around the powerful ffmpeg CLI tool.
 This script just showcases how to use ffmpeg-static; It wouldn't make
 sense to hide a flexible tool behind a limited wrapper script.
 Usage:
+	./example.js <src> <dest>
+Example:
 	./example.js src-audio-file.m4a dest-audio-file.mp3
 `)
 	process.exit(0)
 }
 
 const [src, dest] = argv
+if (!src) {
+	console.error('Missing <src> positional argument.')
+	process.exit(1)
+}
+if (!dest) {
+	console.error('Missing <dest> positional argument.')
+	process.exit(1)
+}
+
 const makeMp3 = shell([
-	'ffmpeg', '-y', '-v', 'error',
-	'-i', join(process.cwd(), src),
+	pathToFfmpeg,
+	'-y', '-v', 'error',
+	'-i', resolve(process.cwd(), src),
 	'-acodec', 'mp3',
 	'-format', 'mp3',
-	join(process.cwd(), dest)
+	resolve(process.cwd(), dest),
 ])
 
 exec(makeMp3, (err) => {