Laravel: disable CLI Console kernel tracing by default (#249)

* Laravel: tracing Console kernel in long-running CLI scripts is disabled by default but can be optionally enabled via `OTEL_PHP_TRACE_CLI_ENABLED`.

Author: ChrisLightfootWild

src/ConsoleInstrumentation.php

@@ -12,12 +12,27 @@
 use OpenTelemetry\API\Trace\StatusCode;
 use OpenTelemetry\Context\Context;
 use function OpenTelemetry\Instrumentation\hook;
+use OpenTelemetry\SDK\Common\Configuration\Configuration;
 use OpenTelemetry\SemConv\TraceAttributes;
 use Throwable;
 
 class ConsoleInstrumentation
 {
     public static function register(CachedInstrumentation $instrumentation): void
+    {
+        if (self::shouldTraceCli()) {
+            self::hookConsoleKernel($instrumentation);
+        }
+
+        self::hookCommandExecution($instrumentation);
+    }
+
+    private static function shouldTraceCli(): bool
+    {
+        return PHP_SAPI !== 'cli' || Configuration::getBoolean('OTEL_PHP_TRACE_CLI_ENABLED', false);
+    }
+
+    private static function hookConsoleKernel(CachedInstrumentation $instrumentation): void
     {
         hook(
             Kernel::class,
@@ -58,7 +73,10 @@ public static function register(CachedInstrumentation $instrumentation): void
                 $span->end();
             }
         );
+    }
 
+    private static function hookCommandExecution(CachedInstrumentation $instrumentation): void
+    {
         hook(
             Command::class,
             'execute',

tests/Integration/ConsoleInstrumentationTest.php

@@ -27,14 +27,15 @@ public function test_command_tracing(): void
          *
          * @see \Illuminate\Foundation\Console\OptimizeClearCommand::handle() for the additional commands/spans.
          */
-        $count = 8;
-        $this->assertCount($count, $this->storage);
-
-        $span = $this->storage[--$count];
-        $this->assertSame('Artisan handler', $span->getName());
-
-        $span = $this->storage[--$count];
-        $this->assertSame('Command optimize:clear', $span->getName());
+        $this->assertCount(7, $this->storage);
+
+        $this->assertSame('Command event:clear', $this->storage[0]->getName());
+        $this->assertSame('Command view:clear', $this->storage[1]->getName());
+        $this->assertSame('Command cache:clear', $this->storage[2]->getName());
+        $this->assertSame('Command route:clear', $this->storage[3]->getName());
+        $this->assertSame('Command config:clear', $this->storage[4]->getName());
+        $this->assertSame('Command clear-compiled', $this->storage[5]->getName());
+        $this->assertSame('Command optimize:clear', $this->storage[6]->getName());
     }
 
     private function kernel(): Kernel