chore(dev-server): Create SimpleFileLogger

packages/dev-server/file-logger.ts

@@ -0,0 +1,27 @@
+import { VendureLogger } from '@vendure/core';
+import fs from 'fs';
+
+// A simple custom logger which writes all logs to a file.
+export class SimpleFileLogger implements VendureLogger {
+    private logfile: fs.WriteStream;
+
+    constructor(logfileLocation: string) {
+        this.logfile = fs.createWriteStream(logfileLocation, { flags: 'w', encoding: 'utf8' });
+    }
+
+    error(message: string, context?: string) {
+        this.logfile.write(`${new Date().toISOString()} ERROR: [${context}] ${message}\n`, 'utf8');
+    }
+    warn(message: string, context?: string) {
+        this.logfile.write(`${new Date().toISOString()} WARN: [${context}] ${message}\n`, 'utf8');
+    }
+    info(message: string, context?: string) {
+        this.logfile.write(`${new Date().toISOString()} INFO: [${context}] ${message}\n`, 'utf8');
+    }
+    verbose(message: string, context?: string) {
+        this.logfile.write(`${new Date().toISOString()} VERBOSE: [${context}] ${message}\n`, 'utf8');
+    }
+    debug(message: string, context?: string) {
+        this.logfile.write(`${new Date().toISOString()} DEBUG: [${context}] ${message}\n`, 'utf8');
+    }
+}