Add cpbin script

cpbin.js

@@ -0,0 +1,66 @@
+'use strict';
+
+const fs = require('fs');
+
+const { bin } = require('.');
+
+
+const copy = (src, dest) => new Promise(
+	(res, rej) => fs.copyFile(src, dest, err => (err ? rej(err) : res()))
+);
+
+
+const exists = name => new Promise(
+	res => fs.access(
+		name,
+		fs.constants.F_OK,
+		err => res(err ? false : true)
+	)
+);
+
+
+const mkdir = async name => {
+	if (await exists(name)) {
+		return;
+	}
+	return new Promise(
+		(res, rej) => fs.mkdir(name, err => (err ? rej(err) : res()))
+	);
+};
+
+
+const rm = async name => {
+	if ( ! await exists(name) ) {
+		return;
+	}
+	await new Promise(
+		(res, rej) => fs.unlink(name, err => (err ? rej(err) : res()))
+	);
+};
+
+
+module.exports = async name => {
+	
+	const srcDir = process.cwd().replace(/\\/g, '/');
+	
+	if ( ! await exists(`${srcDir}/build/Release/${name}.node`) ) {
+		console.error(`Error. File "${srcDir}/build/Release/${name}.node" not found.`);
+	}
+	
+	const binAbs = `${srcDir}/../${bin}`;
+	
+	if ( ! await exists(binAbs) ) {
+		await mkdir(binAbs);
+	}
+	
+	const destAbs = `${binAbs}/${name}.node`;
+	
+	if (await exists(destAbs)) {
+		await rm(destAbs);
+	}
+	
+	await copy(`${srcDir}/build/Release/${name}.node`, destAbs);
+	
+	console.log(`The binary "${name}.node" was copied to "${bin}".`);
+	
+};