What's new in Gradle 4.0
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What the Gradle team have shipped since Gradle 3.0, featuring performance features like compile avoidance, user experience features like the Kotlin DSL, and brand new tools like the Java 9 support
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What's new in Gradle 4.0
- 1. What's new in Gradle 4.0 Eric Wendelin — JavaOne 2017
- 4. From mobile apps to microservices, from small startups to big enterprises, Gradle helps teams build, automate and deliver beGer soHware, faster. Automate Everything Integrates with other tools like Docker for development or opera7ons. Integrates with and delegates to NPM, MSBuild, Ant, and other tools. Build Anything Support for Java, C/C++, Python, JavaScript, Go, and other languages. Go monorepo, mul7-repo, or anywhere in-between. Trusted by Millions Official build tool for Android 4M+ downloads per month #17 on BaOery OSS Index Gradle Overview
- 5. Languages built by Gradle 4% 7% 13% 21% 55% GITHUB PUBLIC SOURCE BYTES Java C JS/CSS/HTML C++ Groovy/Kotlin/Other #BigQuery hOps://git.io/vQfUx
- 6. Gradle Build Anatomy 3-phase build: IniKalizaKon → evaluate seNngs ConfiguraKon → build task graph ExecuKon → execute task graph Evaluate Gradle scripts Execute tasksBuild DAG
- 7. Incremental Builds TaskInputs Outputs UP-TO-DATE EXECUTE same contents ? same contents ?
- 8. Gradle 3.0 => Sep 19, 2016 Gradle 4.0 => Jun 14, 2017 Gradle 4.2.1 => Current Version Brief Gradle Version History
- 9. ‣ Incremental Compile ‣ Compile Avoidance ‣ Build Cache ‣ Parallelism Shipped since Gradle 3.0 Performance ✦ Buildship 2.0 ✦ Kotlin DSL ✦ Improved CLI ✦ Build Scans User Experience ❖ Java Library Plugin ❖ Java 9 Support ❖ NaKve Build Features ❖ Composite Builds New Tools
- 10. Shipped since Gradle 3.0 ‣ Incremental Compile ‣ Compile Avoidance ‣ Build Cache ‣ Parallelism Performance ✦ Buildship 2.0 ✦ Kotlin DSL ✦ Improved CLI ✦ Build Scans User Experience ❖ Java Library Plugin ❖ Java 9 Support ❖ NaKve Build Features ❖ Composite Builds New Tools
- 12. • Analyze class dependencies to opKmize which classes are recompiled • Fast in-memory cache of class ABIs inside daemon Incremental Compila7on for Java
- 13. Lorem ipsum Lorem ipsum Lorem ipsum Incremental Compila7on
- 15. Recommended JavaOne Talk: Maximizing Incrementality with Gradle - Cedric Champeau at 12:15pm tomorrow [CON2992] Incremental Compila7on
- 17. Gradle recognizes ABI breaking changes, and will trigger recompilaKon only when ABI is changed. Compile Avoidance
- 18. Compile Avoidance Example Does MyApp need to be recompiled? No!
- 22. buildCache { local { enabled = !isCI } remote(HttpBuildCache) { url = "https://my.ge.server/cache/" push = isCI } } CI Remote Cache Local Cache Developer Build Cache
- 23. As of Gradle 4.2, Java and Scala toolchains are cacheable by default. We're working on leveraging this for all sensible tasks.
- 25. Self-hosted Build Scans Collect build history across all Gradle builds. Export build data; perform trend analysis and data-driven engineering effec7veness. gradle.com/build-scans Enterprise Build Cache Easy installa7on and maintenance tools for the Gradle Build Cache. Enjoy much faster builds by reusing task outputs across machines. gradle.com/build-cache Support and ConsulQng Get help migra7ng or upgrading Gradle. Expert build op7miza7on, saving 7me and improving developer happiness. gradle.org/services Gradle Enterprise Enterprise-grade Build Cache & Build Scans
- 29. Worker API Without Worker API Using Worker API
- 32. • Faster configuraKon • Faster gradle tasks • Faster archive processing • Faster daemon communicaKon • lots more... Performance Improvements
- 33. Gradle 4.2 is 2-100x faster than Gradle 3.0 when using all of the new performance features — upgrade! Summary
- 34. Shipped since Gradle 3.0 ‣ Incremental Compile ‣ Compile Avoidance ‣ Build Cache ‣ Parallelism Performance ✦ Buildship 2.0 ✦ Kotlin DSL ✦ Improved CLI ✦ Build Scans User Experience ❖ Java Library Plugin ❖ Java 9 Support ❖ NaKve Build Features ❖ Composite Builds New Tools
- 35. Java Library Plugin New Tools
- 36. compile: dependencies needed to compile runtime: dependencies needed to run project Java Library Plugin Not sufficient!
- 37. There are at least 2 kinds of Java projects: applicaQons (standalone, no API) libraries (exposes an API) Java Library Plugin
- 38. // For Java Libraries that expose an API - apply plugin: "java" + apply plugin: "java-library" dependencies { - compile "org.apache.commons:commons-math3:3.6.1" - compile "com.google.guava:21.0" + api "org.apache.commons:commons-math3:3.6.1" + implementation "com.google.guava:21.0" }
- 40. Java 9 Support New Tools
- 41. Gradle 4.2.1 provides runKme support for Java 9 applicaKons and libraries. It does not have first-class support for Java 9 modules yet. Java 9 Support
- 42. 1. Add module-info.java 2. Modify JavaCompile tasks to produce modules 3. Modify compile test tasks to patch modules 4. Modify Test tasks to consume patched modules Adop7ng Java 9 modules using Gradle
- 43. Using Java 9 modules with Gradle ext.moduleName = "org.gradle.actors" compileJava { inputs.property("moduleName", moduleName) doFirst { options.compilerArgs = ["--module-path", classpath.asPath] classpath = project.files() } }
- 44. Java 9 Support plugins { id "org.gradle.java.experimental-jigsaw" version "0.1.1" } DO NOT USE THIS PLUGIN IN PRODUCTION!
- 46. NaKve Build Features New Tools
- 47. • Parallel compilaKon and linking by default • VS2015 Support • Build Dependents Na7ve Build Features
- 49. gradle myTask --include-build ../separate-project
- 50. | X Composite Builds • Combine independent Gradle builds • SubsKtute binary with project dependencies • Quick local experimentaKon • Cross-repository refactoring • Smooth migraKon from monolith to mulK-repo • Faster plugin prototyping
- 53. Shipped since Gradle 3.0 ‣ Incremental Compile ‣ Compile Avoidance ‣ Build Cache ‣ Parallelism Performance ✦ Buildship 2.0 ✦ Kotlin DSL ✦ Improved CLI ✦ Build Scans User Experience ❖ Java Library Plugin ❖ Java 9 Support ❖ NaKve Build Features ❖ Composite Builds New Tools
- 55. • Composite Build support • Fresh new design • --offline mode support Buildship 2.0
- 58. • Auto-compleKon and content assist • Quick documentaKon • NavigaKon to source • Refactoring and more Kotlin DSL
- 73. git.io/gradle-compleKon • CompleKon for tasks, flags, and common properKes • Available for bash and zsh • Kotlin build scripts support • ~20x faster than alternaKves for medium to large projects
- 76. • Persistent • Shareable • Customizable • Fast Build Scans
- 79. • Trend analysis • A/B tesKng (Build Comparison) • Flaky test detecKon • Engineering workflow opKmizaKon Pufng Build Scans Together
- 82. ‣ Incremental Compile ‣ Compile Avoidance ‣ Build Cache ‣ Parallelism Shipped since Gradle 3.0 Performance ✦ Buildship 2.0 ✦ Kotlin DSL ✦ Improved CLI ✦ Build Scans User Experience ❖ Java Library Plugin ❖ Java 9 Support ❖ NaKve Build Features ❖ Composite Builds New Tools
- 83. • gradle.org/guides — Get started using various technologies with Gradle • gradle.org/training — Monthly free online training with core engineers • gradle.com/enterprise — Build together; not alone Learn More
- 84. @eriwen
- 85. @gradle
- 86. w Thank You Eric Wendelin — @eriwen