Also add setBasePath to NormalizerFormatter/JsonFormatter

src/Monolog/Formatter/NormalizerFormatter.php

@@ -31,6 +31,8 @@ class NormalizerFormatter implements FormatterInterface
 
     private int $jsonEncodeOptions = Utils::DEFAULT_JSON_FLAGS;
 
+    protected string $basePath = '';
+
     /**
      * @param string|null $dateFormat The format of the timestamp: one supported by DateTime::format
      * @throws \RuntimeException If the function json_encode does not exist
@@ -140,6 +142,21 @@ class NormalizerFormatter implements FormatterInterface
         return $this;
     }
 
+    /**
+     * Setting a base path will hide the base path from exception and stack trace file names to shorten them
+     * @return $this
+     */
+    public function setBasePath(string $path = ''): self
+    {
+        if ($path !== '') {
+            $path = rtrim($path, DIRECTORY_SEPARATOR) . DIRECTORY_SEPARATOR;
+        }
+
+        $this->basePath = $path;
+
+        return $this;
+    }
+
     /**
      * Provided as extension point
      *
@@ -247,11 +264,16 @@ class NormalizerFormatter implements FormatterInterface
             return (array) $e->jsonSerialize();
         }
 
+        $file = $e->getFile();
+        if ($this->basePath !== '') {
+            $file = preg_replace('{^'.preg_quote($this->basePath).'}', '', $file);
+        }
+
         $data = [
             'class' => Utils::getClass($e),
             'message' => $e->getMessage(),
             'code' => (int) $e->getCode(),
-            'file' => $e->getFile().':'.$e->getLine(),
+            'file' => $file.':'.$e->getLine(),
         ];
 
         if ($e instanceof \SoapFault) {
@@ -275,7 +297,11 @@ class NormalizerFormatter implements FormatterInterface
         $trace = $e->getTrace();
         foreach ($trace as $frame) {
             if (isset($frame['file'], $frame['line'])) {
-                $data['trace'][] = $frame['file'].':'.$frame['line'];
+                $file = $frame['file'];
+                if ($this->basePath !== '') {
+                    $file = preg_replace('{^'.preg_quote($this->basePath).'}', '', $file);
+                }
+                $data['trace'][] = $file.':'.$frame['line'];
             }
         }
 

tests/Monolog/Formatter/JsonFormatterTest.php

@@ -118,6 +118,18 @@ class JsonFormatterTest extends TestCase
         $this->assertContextContainsFormattedException($formattedException, $message);
     }
 
+    public function testBasePathWithException(): void
+    {
+        $formatter = new JsonFormatter();
+        $formatter->setBasePath(dirname(dirname(dirname(__DIR__))));
+        $exception = new \RuntimeException('Foo');
+
+        $message = $this->formatRecordWithExceptionInContext($formatter, $exception);
+
+        $parsed = json_decode($message, true);
+        self::assertSame('tests/Monolog/Formatter/JsonFormatterTest.php:' . (__LINE__ - 5), $parsed['context']['exception']['file']);
+    }
+
     public function testDefFormatWithPreviousException()
     {
         $formatter = new JsonFormatter();

tests/Monolog/Formatter/NormalizerFormatterTest.php

@@ -81,6 +81,20 @@ class NormalizerFormatterTest extends TestCase
         ], $formatted);
     }
 
+    public function testFormatExceptionWithBasePath(): void
+    {
+        $formatter = new NormalizerFormatter('Y-m-d');
+        $formatter->setBasePath(dirname(dirname(dirname(__DIR__))));
+        $e = new \LogicException('bar');
+        $formatted = $formatter->normalizeValue([
+            'exception' => $e,
+        ]);
+
+        self::assertSame('tests/Monolog/Formatter/NormalizerFormatterTest.php:' . (__LINE__ - 5), $formatted['exception']['file']);
+        self::assertStringStartsWith('vendor/phpunit/phpunit/src/Framework/TestCase.php:', $formatted['exception']['trace'][0]);
+        self::assertStringStartsWith('vendor/phpunit/phpunit/src/Framework/TestCase.php:', $formatted['exception']['trace'][1]);
+    }
+
     public function testFormatSoapFaultException()
     {
         if (!class_exists('SoapFault')) {