Add example of library usage in a Gradle build #452
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See #451. Was reproducible with ``` ./gradlew --stop; for i in 1 2; ./g radlew -p examples/example-build-logic/ buildPerformanceMetrics --stacktrace; end ```
gabrielfeo
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Aug 24, 2025
Updates the test case that verifies running the example Kotlin **plugin project** (a Gradle task which uses the API, added in #452) against the current library code, i.e. a SNAPSHOT artifact compiled just before the tests and published to Maven local. To fix #404, language version had been downgraded to 1.8. To fully restore compatibility of the latest code, which has since been updated to use Kotlin plugin 2.2.x (with 1.8 language version, but 2.2.x stdlib), stdlib and okhttp are downgraded. This restores compatibility with Gradle 8.11 <= v < 9.0.0. This [build scan][1] demonstrates the compiler version (not language version) incompatibility that is now fixed: ``` e: file:///Users/gfeo/.gradle/caches/modules-2/files-2.1/com.squareup.okhttp3/okhttp-jvm/5.1.0/c17340f19b33c1d28a47b8dc4ae15018aff6dc10/okhttp-jvm-5.1.0.jar!/META-INF/okhttp.kotlin_module Module was compiled with an incompatible version of Kotlin. The binary version of its metadata is 2.2.0, expected version is 2.0.0. e: file:///Users/gfeo/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib/2.2.10/30de6faa127a4a012db8e71bf1b9c0a99b1402b2/kotlin-stdlib-2.2.10.jar!/META-INF/kotlin-stdlib-jdk7.kotlin_module Module was compiled with an incompatible version of Kotlin. The binary version of its metadata is 2.2.0, expected version is 2.0.0. e: file:///Users/gfeo/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib/2.2.10/30de6faa127a4a012db8e71bf1b9c0a99b1402b2/kotlin-stdlib-2.2.10.jar!/META-INF/kotlin-stdlib-jdk8.kotlin_module Module was compiled with an incompatible version of Kotlin. The binary version of its metadata is 2.2.0, expected version is 2.0.0. e: file:///Users/gfeo/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib/2.2.10/30de6faa127a4a012db8e71bf1b9c0a99b1402b2/kotlin-stdlib-2.2.10.jar!/META-INF/kotlin-stdlib.kotlin_module Module was compiled with an incompatible version of Kotlin. The binary version of its metadata is 2.2.0, expected version is 2.0.0. ``` Prevents regressions like #404. Follow-up to #432, #456 and #458 for example-gradle-task. ExampleProjectTest is also refactored to use the init script introduced here. A smoke test verifying that the example is properly forced to use the published `SNAPSHOT` is added to both tests. `buildSrc` is used in `example-gradle-task` because `pluginManagement.repositories.exclusiveContent` set via init script rules don't seem to apply to build dependencies resolved from included builds. [1]: https://scans.gradle.com/s/hxgfny2ssyugo/tests/task/:library:examplesTest/details/com.gabrielfeo.develocity.api.example.gradle.ExampleGradleTaskTest/smokeTest()?focused-execution=1&top-execution=1#L0-L3
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Add a tested example to support the use case of a Gradle build. Related to #404 aiming to prevent regressions around this use case.