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[[base_plugin]]
= The Base Plugin

The Base Plugin provides some tasks and conventions that are common to most builds and adds a structure to the build that promotes consistency in how they are run. Its most significant contribution is a set of <<organizing_tasks.adoc#sec:lifecycle_tasks,_lifecycle_ tasks>> that act as an umbrella for the more specific tasks provided by other plugins and build authors.

[[sec:base_plugin_usage]]
== Usage

Applying the Base Plugin:

====
include::sample[dir="snippets/base/basePlugin/kotlin",files="build.gradle.kts[tags=apply-base-plugin]"]
include::sample[dir="snippets/base/basePlugin/groovy",files="build.gradle[tags=apply-base-plugin]"]
====

[[sec:base_tasks]]
== Task

`clean` — `Delete`::
Deletes the build directory and everything in it, i.e. the path specified by the link:{groovyDslPath}/org.gradle.api.file.ProjectLayout.html#org.gradle.api.file.ProjectLayout:buildDirectory[layout.buildDirectory] project property.

`check` — _lifecycle task_::
Plugins and build authors should attach their verification tasks, such as ones that run tests, to this lifecycle task using `check.dependsOn(__task__)`.

`assemble` — _lifecycle task_::
Plugins and build authors should attach tasks that produce distributions and other consumable artifacts to this lifecycle task. For example, `jar` produces the consumable artifact for Java libraries. Attach tasks to this lifecycle task using `assemble.dependsOn(__task__)`.

`build` — _lifecycle task_::
_Depends on_: `check`, `assemble`
+
Intended to build everything, including running all tests, producing the production artifacts and generating documentation. You will probably rarely attach concrete tasks directly to `build` as `assemble` and `check` are typically more appropriate.

`build__Configuration__` — task rule::
Assembles those artifacts attached to the named configuration. For example, `buildRuntimeElements` will execute any task that is required to create any artifact attached to the `runtimeElements` configuration.

`clean__Task__` — task rule::
Removes the <<incremental_build.adoc#sec:task_inputs_outputs,defined outputs>> of a task, e.g. `cleanJar` will delete the JAR file produced by the `jar` task of the Java Plugin.


[[sec:base_plugin_configurations]]
== Dependency management

The Base Plugin adds no <<dependency_configurations.adoc#sub:what-are-dependency-configurations,configurations for dependencies>>, but it does add the following configurations:

`default`::
A fallback configuration used when dependency resolution is performed without request attributes.
+
*New builds and plugins should not be using the `default` configuration!*
It remains solely for backwards compatibility.
Dependency resolution should be performed with request attributes.

`archives`::
All artifacts defined on the `archives` configuration are automatically built by the `assemble` task.
+
*New builds and plugins should not be using the `archives` configuration!*
It remains solely for backwards compatibility.
Instead, task dependencies should be declared directly on the `assemble` task.

[[sec:base_plugin_extension]]
== Contributed extensions

The Base Plugin adds the link:{groovyDslPath}/org.gradle.api.plugins.BasePluginExtension.html[`base` extension] to the project.
This allows to configure the following properties inside a dedicated DSL block.

====
include::sample[dir="snippets/files/archivesChangedBaseName/kotlin",files="build.gradle.kts[tags=base-plugin-config]"]
include::sample[dir="snippets/files/archivesChangedBaseName/groovy",files="build.gradle[tags=base-plugin-config]"]
====

`archivesName` — default: `$project.name`::
Provides the default link:{groovyDslPath}/org.gradle.api.tasks.bundling.AbstractArchiveTask.html#org.gradle.api.tasks.bundling.AbstractArchiveTask:archiveBaseName[AbstractArchiveTask.getArchiveBaseName()] for archive tasks.

`distsDirectory` — default: `layout.buildDirectory.dir("distributions")`::
Default name of the directory in which distribution archives, i.e. non-JARs, are created.

`libsDirectory` — default: `layout.buildDirectory.dir("libs")`::
Default name of the directory in which library archives, i.e. JARs, are created.

The plugin also provides default values for the following properties on any task that extends link:{groovyDslPath}/org.gradle.api.tasks.bundling.AbstractArchiveTask.html[AbstractArchiveTask]:

`destinationDirectory`::
Defaults to `distsDirectory` for non-JAR archives and `libsDirectory` for JARs and derivatives of JAR, such as WARs.

`archiveVersion`::
Defaults to `$project.version` or 'unspecified' if the project has no version.

`archiveBaseName`::
Defaults to `archivesName`.
