Add circular dependency detection and logging library

1 files changed, 23 insertions, 0 deletions

diff --git a/app/logger.ts b/app/logger.ts
new file mode 100644
index 0000000..4ce0150
--- /dev/null
+++ b/app/logger.ts
@@ -0,0 +1,23 @@
+import winston from 'winston';
+
+const enumerateErrorFormat = winston.format((info) => {
+    if (info instanceof Error) {
+      Object.assign(info, { message: info.stack });
+    }
+    return info;
+  });
+  
+export const logger = winston.createLogger({
+    level: process.env.LOGGING_LEVEL === 'development' ? 'debug' : 'info',
+    format: winston.format.combine(
+        enumerateErrorFormat(),
+        winston.format.colorize(),
+        winston.format.splat(),
+        winston.format.printf(({ level, message }) => `${level}: ${message}`)
+    ),
+    transports: [
+        new winston.transports.Console({
+            stderrLevels: ['error'],
+        }),
+    ],
+});