Power Up your Gradle

Does Gradle make you sad? Are slow & flaky builds stealing your time? Are you a Maven maven, longing for the days you could write incomprehensible build files in XML rather than Groovy? If so, this session is for you! Together, we will delve into some techniques to keep your Gradle builds simple and maintainable.

Transcript

1. Power Up your Gradle Nayan Hajratwala - @nhajratw - nayan@chikli.com
2. A Quick Smackdown • In the Red Corner, a Maven POM f ile: • https://raw.githubusercontent.com/metasfresh/ metasfresh-parent-legacy/2018-19_grave_noyce/ pom.xml • In the Blue Corner, a Gradle Build f ile: • https://raw.githubusercontent.com/asciidoctor/ asciidoctorj/main/build.gradle
3. Get Consistent Get Repeatable Get Current Get Fast
4. Get Consistent
5. Dependency Declarations dependencies { implementation group: ”org.springframework", name: ”spring - core", version: ”2.5" implementation(“org.springframework:spring - core:2.5”) implementation(‘org.springframework:spring - core:2.5’) implementation “org.springframework:spring - core:2.5” implementation ‘org.springframework:spring - core:2.5’ }
6. Dependency Declarations dependencies { implementation(group = org.springframework", name = ”spring - core", version = ”2.5”) implementation(“org.springframework:spring - core:2.5”) } • Typesafe / Better refactoring & content assist support • build.gradle -> build.gradle.kts
7. Plugins Out with the old… apply plugin: "com.github.ben - manes.versions" buildscript { repositories { gradlePluginPortal() } dependencies { classpath “com.github.ben - manes:gradle - versions - plugin:0.39.0” } } In with the new… plugins { id "com.github.ben - manes.versions" version “0.39.0” }
8. Get Repeatable
9. Always use a wrapper • Install the gradle wrapper in your project gradle wrapper - - gradle - version=7.7.1 • Ensures everyone using your project uses the same version
10. Has this ever happened to you?
11. Reduce the friction • https://github.com/gdubw/gng brew tap gdubw/gng & & brew install gng • Anywhere in your project hierarchy, you can just do: gw clean build
12. Get Current
13. JVM - living in the past… • Be Honest, which JVM are you using? • Java 8 was released in 2014 • Current LTS version is 11 • Latest version is 16 • Next LTS version is 17 - available Sept 14, 2021 • Java Toolchains - https://docs.gradle.org/current/userguide/toolchains.html val jvmVersion: JavaLanguageVersion = JavaLanguageVersion.of(16) java { toolchain { languageVersion.set(jvmVersion) } }
14. Gradle • Each Gradle release comes with usability & performance improvements, so upgrade & check release notes - https://gradle.org/releases/ • Increment one version at a time, f ixing warnings & deprecations as you go.
15. Versions Plugin • https://github.com/ben-manes/gradle-versions-plugin gw dependencyUpdates # depUp anyone? • Consider Dependabot style auto updates • Protip: If you’re way behind, incrementally upgrade to slowly eliminate warnings & keep it working. 1.3.1 - > 1.3.9 - > 1.4.0 - > 1.4.5 - > 2.0.0 - > 2.0.1
16. Get Fast
17. Build Cache • Saves time by reusing outputs produced by other build • https://docs.gradle.org/current/userguide/build_cache.html • In gradle.properties org.gradle.caching=true
18. Parallelize tasks • Especially effective for multi-module projects • https://docs.gradle.org/current/userguide/performance.html#parallel_execution • In gradle.properties org.gradle.parallel=true
19. Test Performance • Identify & f ix slow tests • Ensure tests are independent • Parallelize tasks.withType<Test>().conf i gureEach { useJUnitPlatform() reports.html.required.set(false) maxParallelForks = (Runtime.getRuntime().availableProcessors() / 2).takeIf { it > 0 } ?: 1 } • https://docs.gradle.org/current/userguide/performance.html#parallel_test_execution
20. Build Scan • Get an overview of your build, performance metrics, etc. • https://scans.gradle.com/ gw build - - scan # or whatever tasks you want • Lots more tips here: • https://docs.gradle.org/current/userguide/performance.html
21. Power Up your Gradle Nayan Hajratwala - @nhajratw - nayan@chikli.com