Issue32 logs improvement (#44)

* logger function created

* logs folder added to store logs

* utility function to show output

* logProcessOutput function to show stdout and stderr

* app.log added in .gitignore

* app.log path corrected

* file app.log deleted

Author: HeeManSu

.gitignore

@@ -1,3 +1,4 @@
 node_modules
 dist
-*.env
+*.env
+/logs/app.log

src/api.ts

@@ -29,7 +29,8 @@ import {
 	execPromise,
 	exists,
 	installDependencies,
-	isIAllApps
+	isIAllApps,
+	logProcessOutput
 } from './utils/utils';
 
 import { PackageError } from '@metacall/protocol/package';
@@ -236,12 +237,8 @@ export const deploy = catchAsync(
 				currentFile
 			});
 
-			proc.stdout?.on('data', (data: Buffer) => {
-				console.log(data.toString().green);
-			});
-			proc.stderr?.on('data', (data: Buffer) => {
-				console.log(data.toString().red);
-			});
+			logProcessOutput(proc.stdout, 'green');
+			logProcessOutput(proc.stderr, 'red');
 
 			proc.on('message', (data: childProcessResponse) => {
 				if (data.type === protocol.g) {

src/utils/logger.ts

@@ -0,0 +1,18 @@
+import * as fs from 'fs';
+import * as path from 'path';
+
+const logFilePath = path.join(__dirname, '../../logs/');
+const logFileName = 'app.log';
+const logFileFullPath = path.join(logFilePath, logFileName);
+
+export const logger = {
+	log: (message: string): void => {
+		const timeStamp = new Date().toISOString();
+		const logMessage = `${timeStamp} - ${message}\n`;
+		console.log(message);
+		if (!fs.existsSync(logFileFullPath)) {
+			fs.writeFileSync(logFileFullPath, '', { encoding: 'utf-8' });
+		}
+		fs.appendFileSync(logFileFullPath, logMessage, { encoding: 'utf-8' });
+	}
+};

src/utils/utils.ts

@@ -13,6 +13,7 @@ import {
 	IAllApps,
 	InspectObject
 } from '../constants';
+import { logger } from './logger';
 
 export const dirName = (gitUrl: string): string =>
 	String(gitUrl.split('/')[gitUrl.split('/').length - 1]).replace('.git', '');
@@ -139,3 +140,12 @@ export const diff = (
 export function isIAllApps(data: unknown): data is IAllApps {
 	return typeof data === 'object' && data !== null;
 }
+
+export function logProcessOutput(
+	proc: NodeJS.ReadableStream | null,
+	color: 'green' | 'red'
+): void {
+	proc?.on('data', (data: Buffer) => {
+		logger.log(data.toString()[color]);
+	});
+}