Retry tests (#876)

Author: trask

buildSrc/build.gradle.kts

@@ -15,6 +15,7 @@ dependencies {
   implementation("com.diffplug.spotless:spotless-plugin-gradle:6.18.0")
   implementation("net.ltgt.gradle:gradle-errorprone-plugin:3.1.0")
   implementation("net.ltgt.gradle:gradle-nullaway-plugin:1.6.0")
+  implementation("com.gradle.enterprise:com.gradle.enterprise.gradle.plugin:3.13.2")
 }
 
 spotless {
@@ -32,6 +33,6 @@ spotless {
       // also very hard to find out where this happens
       "ktlint_standard_wrapping" to "disabled"
     ))
-    target("**/*.gradle.kts",)
+    target("**/*.gradle.kts")
   }
 }

buildSrc/src/main/kotlin/otel.java-conventions.gradle.kts

@@ -1,3 +1,4 @@
+import com.gradle.enterprise.gradleplugin.testretry.retry
 import io.opentelemetry.gradle.OtelJavaExtension
 import org.gradle.api.tasks.testing.logging.TestExceptionFormat
 
@@ -66,6 +67,13 @@ tasks {
       showCauses = true
       showStackTraces = true
     }
+
+    retry {
+      // You can see tests that were retried by this mechanism in the collected test reports and build scans.
+      if (System.getenv().containsKey("CI") || rootProject.hasProperty("retryTests")) {
+        maxRetries.set(5)
+      }
+    }
   }
 
   withType<Javadoc>().configureEach {