Similarly, the maximum fully supported version is 7.6.0. (Ep. When you use the custom JDK home feature in the Kotlin Gradle plugin, kapt task workers use only process isolation mode. The Kotlin DSL currently supports type-safe model accessors for any of the following that are contributed by plugins: Dependency and artifact configurations (such as implementation and runtimeOnly contributed by the Java Plugin), Project extensions and conventions (such as sourceSets), Extensions on the dependencies and repositories containers, Elements in the tasks and configurations containers, Elements in project-extension containers (for example the source sets contributed by the Java Plugin that are added to the sourceSets container). java { And the 'app-1' wants to use 'lib-2', but also use some features from guava 28.0. What is the significance of Headband of Intellect et al setting the stat to 19? If you need to eagerly configure or register container elements simply replace existing() with getting() and registering() with creating(). } Q&A for work. }, kotlin { } Heres an example of doing that for the Android Plugin: This technique is not that different from what Android Studio produces when creating a new build. This will happen both at the top level of your build scripts most plugin extensions are added to the Project object and within the blocks that configure an extension. If you want to learn about ways to make your builds faster, read Optimize Your Build Speed . project.tasks.withType().configureEach { } implementation(kotlin("test")) // This brings all the platform dependencies automatically If you encounter problems, it can be disabled by setting the org.gradle.kotlin.dsl.scriptCompilationAvoidance system property to false. implementation 'com.example:my-library:1.0' - src Most upvoted and relevant comments will be first, Computational mass spectrometry and data visualization, Moscow Institute of Physics and Technology, Kotlin, Backend, Open Source maintainer, Technical Writing, How Kotlin makes editing your Gradle build less frustrating, Better dependency management in Android Studio 3.5 with Gradle buildSrcVersions, with(ConfigObject) { "Language $KOTLIN".isSparkingJoy() }, Configuring Gradle with "gradle.properties", How to learn Kotlin: browser vs IDE, books vs tutorials, for newbies and Java devs, How to become Effective with Kotlin? Project extensions and conventions have both a name and a unique type, but the Kotlin DSL only needs to know the type in order to configure them. The Using Gradle plugins chapter explains how you can declare plugins in the root project build script with a version and then apply them to the appropriate subprojects' build scripts. #org.gradle.warning.mode=(all,none,summary) kotlin("<>") version "1.9.0" What I'm doing now in build.gradle.kts is: fun property (name: String) = properties [name] as String println . In our sample build script, we want to configure a source set named main within the source set container, which we can do by using the named() method in place of an accessor, like so: All elements within a container-based project extension have a name, so you can use this technique in all such cases. This means that you can use type-safe accessors for the model elements that they contribute. Note that you cant use this technique if you want to apply such a plugin either to the root project build script of a multi-project build (rather than solely to its subprojects) or to a single-project build. This type of plugin manages which repositories to download a toolchain from. For example, this includes any configurations you might define in your own build script. org.jetbrains.kotlin.gradle.internal.KaptWithoutKotlincTask The following sample demonstrates how to reference and configure artifact configurations without type accessors: The code looks similar to that for the type-safe accessors, except that the configuration names are string literals in this case. This will become less of an issue as the language matures. val jvmMain by getting { Used both during compilation and at runtime and is exported to library consumers. Then in gradle build file you should pass it inside the program. Existing Java code can be called from Kotlin in a natural way, and Kotlin code can be used from Java rather smoothly as well. Everything you can read in a Kotlin DSL script is Kotlin code compiled and executed by Gradle. - kotlin implementation("org.jetbrains.kotlinx:kotlinx-coroutines-core-jvm:1.7.1") Plugins fetched from a source other than the Gradle Plugin Portal may or may not be usable with the plugins {} block. Heres an example: Both the Groovy and Kotlin languages support named function parameters and default arguments, although they are implemented very differently. Gradle is the most commonly used build tool in Kotlin, and it provides a Kotlin DSL which is used by default when generating a Kotlin project, so this is the recommended choice. You can change that by defining a Java toolchain to be used by the project: Gradle embeds Kotlin in order to provide support for Kotlin-based scripts. You'll generate a Kotlin application that follows Gradle's conventions. If any type from a dependency is used in the public API of the current module, use an api dependency. As an example, add to your settings.gradle(.kts) the following plugin: Check that the version of foojay-resolver-convention corresponds to your Gradle version on the Gradle site. To learn more, see our tips on writing great answers. how long it takes to build your project which parts of your build are slow Inspecting provides a comparison point to better understand the impact of the changes recommended on this page. }, kotlin { useTestNG() code of conduct because it is harassing, offensive or spammy. To call a Kotlin function that has named arguments from Groovy, just use a normal method call with positional parameters. } // https://android.googlesource.com/platform/tools/base/+/mirror-goog-studio-master-dev/build-system/gradle-core/src/main/java/com/android/build/gradle/options/BooleanOption.kt. This makes it easier to keep plugin versions consistent across projects within a build. Gradle's Kotlin DSL provides an alternative syntax to the traditional Groovy DSL with an enhanced editing experience in supported IDEs, with superior content assist, refactoring, documentation, and more. When targeting JavaScript, use the kotlin-multiplatform plugin as well. These serve a similar purpose to and have now been superseded by extensions. Thats because the packaged module contains the details of which plugin ID maps to which plugin implementation class, using the properties-file mechanism described in the Writing Custom Plugins chapter. Additionally, the project has to be reopened after the property value is changed. The KotlinClosure0 to KotlinClosure2 types allows adapting Kotlin functions to Groovy closures with more flexibility. Thanks for keeping DEV Community safe. You can, however, omit the type if you only need to configure properties or to call methods that are common to all tasks, i.e. Building modules for the Java Module System, Building applications using the Java Module System. How to play the "Ped" symbol when there's no corresponding release symbol. DEV Community 2016 - 2023. Are you sure you want to hide this comment? Many of the objects, functions and properties you use in your build scripts come from the Gradle API and the APIs of the applied plugins. } // replace `<>` with the plugin name As mentioned in the limitations, you must import your project from the Gradle model to get content-assist and refactoring tools for Kotlin DSL scripts in IntelliJ IDEA. Using https://gradle.org as your build tool? If some plugin makes heavy use of Groovy metaprogramming, then using it from Kotlin or Java or any statically-compiled language can be very cumbersome. Note: Beginning with Android Studio 3.5, the Apply Changes feature is enabled by default and cannot be disabled. sourceSets { associateWith(kotlin.target.compilations.getByName("main")) The Kotlin Gradle plugin selects the appropriate JVM standard library depending on the compilerOptions.jvmTarget compiler option of your Gradle build script. All containers in Gradle implement NamedDomainObjectContainer. I'm trying to move this code from groovy to kotlin DSL in my Android project but don't know how to read properties from a custom version.properties. Templates let you quickly answer FAQs or store snippets for re-use. There are a couple issues that have some details around this: gradle/kotlin-dsl#480; gradle/gradle#1697; The way to do this in the most recent verions of Gradle is to use settings.gradle or settings.gradle.kts and the pluginManagement {} block.. When mixing languages in your build logic, you may have to cross language boundaries. sourceSets { Iterable asArguments() { Once unpublished, all posts by jmfayard will become hidden and only accessible to themselves. Have ideas from programming helped us create new mathematical proofs? dependencies { The main difference is that the subprojects' build scripts in the above sample declare their plugins using the plugins {} block. The Task DSL allows setting any JDK version for any task implementing the UsesKotlinJavaToolchain interface. For example you may want to pass in a specific property value to control runtime behavior just for this one invocation of the build. Name initialization scripts according to the pattern *.init.gradle.kts or simply init.gradle.kts. In contrast to the build.gradle file, only one settings.gradle file is executed per Gradle build. The Kotlin DSL replaces such dynamic resolution with type-safe model accessors that work with model elements contributed by plugins. You have to update Gradle because there is no good way to setup plugin versions before 5.6, $ ./gradlew wrapper --gradle-version 5.6.2, There is a boilerplate resolutionStrategy that you have to copy/paste in settings.gradle.kts. Proper way to get properties with Kotlin-script config for Gradle. Inspect your build again. Besides, we can also possible to register code as part of different life cycle hooks of a build. }, plugins { For example, the Android Plugin for Gradle is not published to the Gradle Plugin Portal and at least up to version 3.2.0 of the plugin the metadata required to resolve the artifacts for a given plugin identifier is not published to the Google repository. } Taking this approach means that you wont be able to use type-safe accessors for model elements contributed by the plugins. That section also describes which containers support type-safe accessors. The Kotlin DSL provides a withGroovyBuilder {} utility extension that attaches the Groovy metaprogramming semantics to objects of type Any. Groovy DSL script files use the .gradle file name extension. kotlin("jvm") version "1.9.0" }, kotlin { # See https://github.com/jmfayard/buildSrcVersions/issues/77, #org.gradle.java.home=(path to JDK home) Use for APIs which have a third-party implementation available at runtime. exec {} runs an executable immediately. You can then find out the type of a given task by running gradle help --task , as demonstrated here: Note that the IDE can assist you with the required imports, so you only need the simple names of the types, i.e. 'lib-2' is newer and uses 'lib-1', wants to supersede guava 26.0 with 27.0. Just like the Groovy-based equivalent, the Kotlin DSL is implemented on top of Gradles Java API. } Connect and share knowledge within a single location that is structured and easy to search. The IDE wont be able to help you discover the available configurations in this situation, but you can look them up either in the corresponding plugins documentation or by running gradle dependencies. Didn't notice first that you used issue tracker as a wiki :). }, kotlin { In IntelliJ IDEA this can be done by opening Help > Edit Custom VM Options and adding -Dorg.gradle.kotlin.dsl.logging.tapi=true. Configure the behavior of this check by setting the kotlin.jvm.target.validation.mode property in the build.gradle(.kts) file to: error the plugin fails the build; the default value for projects on Gradle 8.0+. Gradle provides several ways to manage this complexity using lazy configuration. You can declare your plugins within the subprojects to which they apply, but we recommend that you also declare them within the root project build script. In order to provide a way to construct closures while preserving Kotlins strong typing, two helper methods exist: Both methods are useful in different circumstances and depend upon the method you are passing the Closure instance into. Some of them can contain objects of different types and implement PolymorphicDomainObjectContainer. Additionally, Gradle keeps its lifecycle process, rerunning . Only the main project build scripts and precompiled project script plugins have type-safe model accessors. Used for compilation of the current module and is not available at runtime nor during compilation of other modules.

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