Updated tools

Tools/tool-utils.js

@@ -0,0 +1,84 @@
+const toolUtils = {};
+
+toolUtils.execCommand = function(command) {
+	const exec = require('child_process').exec
+
+	return new Promise((resolve, reject) => {
+		let childProcess = exec(command, (error, stdout, stderr) => {
+			if (error) {
+				if (error.signal == 'SIGTERM') {
+					resolve('Process was killed');
+				} else {
+					reject(error);
+				}
+			} else {
+				resolve(stdout.trim());
+			}
+		});
+	});
+}
+
+toolUtils.downloadFile = function(url, targetPath) {
+	const https = require('https');
+	const fs = require('fs');
+
+	return new Promise((resolve, reject) => {
+		const file = fs.createWriteStream(targetPath);
+		const request = https.get(url, function(response) {
+			if (response.statusCode !== 200) reject(new Error('HTTP error ' + response.statusCode));
+			response.pipe(file);
+			file.on('finish', function() {
+				file.close();
+				resolve();
+			});
+		}).on('error', (error) => {
+			reject(error);
+		});
+	});
+}
+
+toolUtils.fileSha256 = function(filePath) {
+	return new Promise((resolve, reject) => {
+		const crypto = require('crypto');
+		const fs = require('fs');
+		const algo = 'sha256';
+		const shasum = crypto.createHash(algo);
+
+		const s = fs.ReadStream(filePath);
+		s.on('data', function(d) { shasum.update(d); });
+		s.on('end', function() {
+			const d = shasum.digest('hex');
+			resolve(d);
+		});
+		s.on('error', function(error) {
+			reject(error);
+		});
+	});
+}
+
+toolUtils.unlinkForce = async function(filePath) {
+	const fs = require('fs-extra');
+
+	try {
+		await fs.unlink(filePath);
+	} catch (error) {
+		if (error.code === 'ENOENT') return;
+		throw error;
+	}
+}
+
+toolUtils.fileExists = async function(filePath) {
+	return new Promise((resolve, reject) => {
+		fs.stat(filePath, function(err, stat) {
+			if (err == null) {
+				resolve(true);
+			} else if(err.code == 'ENOENT') {
+				resolve(false);
+			} else {
+				reject(err);
+			}
+		});
+	});
+}
+
+module.exports = toolUtils;