fix: compatibility with log aggregators

src/logger.ts

@@ -13,7 +13,7 @@
  * this program. If not, see <https://www.gnu.org/licenses/>.
  */
 import {stringify} from 'flatted';
-import {isNodeEnvironment, isProductiveNodeEnvironment} from './common';
+import {isNodeEnvironment, isProductiveEnvironment, isProductiveNodeEnvironment} from './common';
 import {Transformation} from './transformation';
 import {AddLogLevel} from './transformations/add-log-level';
 import {Transport} from './transport';
@@ -91,17 +91,24 @@ export class Logger {
 
   /**
    * Apply transformations to an output
+   * Will strip newlines in production environment
    *
    * @param logLevel Log level of the output
    * @param output Output to apply transformations to
    */
   private static applyTransformers(logLevel: LogLevel, output: string): string {
+    if (isProductiveEnvironment()) {
+      output = output.replace(/[\n\r]/g, ' ');
+    }
+
     if (!Array.isArray(Logger.transformations) || Logger.transformations.length === 0) {
       return output;
     }
 
     let transformedOutput = output;
-    for (const transformation of Logger.transformations) {
+    for (const transformation of Logger.transformations.filter(transform =>
+      !isProductiveEnvironment() ? true : transform.useInProduction === isProductiveEnvironment(),
+    )) {
       transformedOutput = transformation.transform(logLevel, transformedOutput);
     }
 

src/transformation.ts

@@ -18,6 +18,11 @@ import {LogLevel} from './logger';
  * A transformer for log output
  */
 export interface Transformation {
+  /**
+   * Indicates if this transformation is stripped in production environments
+   */
+  useInProduction: boolean;
+
   /**
    * Transform an output
    *

src/transformations/add-log-level.ts

@@ -19,6 +19,11 @@ import {Transformation} from '../transformation';
  * Transformation that adds the log level to output
  */
 export class AddLogLevel implements Transformation {
+  /**
+   * Keep this transformation in production environments
+   */
+  useInProduction = true;
+
   /**
    * Add log level to output
    *

src/transformations/colorize.ts

@@ -20,6 +20,11 @@ import {Transformation} from '../transformation';
  * Transformation that colorizes log output
  */
 export class Colorize implements Transformation {
+  /**
+   * Skip this transformation in production environments
+   */
+  useInProduction = false;
+
   /**
    * Instantiate a new colorize transformation
    *

src/transformations/timestamp.ts

@@ -14,21 +14,15 @@
  */
 import {LogLevel} from '../logger';
 import {Transformation} from '../transformation';
-import moment from 'moment';
 
 /**
  * Transformation that adds a timestamp to output
  */
 export class Timestamp implements Transformation {
   /**
-   * Instantiate a new timestamp transformation
-   *
-   * @see https://momentjs.com/docs/#/displaying/format/
-   * @param format Format for timestamps
+   * Keep this transformation in production environments
    */
-  constructor(private readonly format = 'LLLL') {
-    // noop
-  }
+  useInProduction = true;
 
   /**
    * Add timestamp to output
@@ -37,8 +31,6 @@ export class Timestamp implements Transformation {
    * @param output Output to add timestamp to
    */
   transform(_logLevel: LogLevel, output: string): string {
-    const now = moment();
-
-    return `[${now.format(this.format)}] ${output}`;
+    return `[${new Date().toISOString()}] ${output}`;
   }
 }