# Wrapper

API Documentation: | `Wrapper`

Generates scripts (for *nix and windows) which allow you to build your project with Gradle, without having to install Gradle.

When a user executes a wrapper script the first time, the script downloads and installs the appropriate Gradle distribution and runs the build against this downloaded distribution. Any installed Gradle distribution is ignored when using the wrapper scripts.

The scripts generated by this task are intended to be committed to your version control system. This task also generates a small `gradle-wrapper.jar` bootstrap JAR file and properties file which should also be committed to your VCS. The scripts delegates to this JAR.

### Properties

Property | Description
`actions` | The sequence of `Action` objects which will be executed by this task, in the order of execution.
`ant` | The `AntBuilder` for this task. You can use this in your build file to execute ant tasks.
`archiveBase` | The archive base specifies whether the unpacked wrapper distribution should be stored in the project or in the gradle user home dir.
`archivePath` | The path where the gradle distributions archive should be saved (i.e. the parent dir). The path is relative to the archive base directory.
`convention` | Deprecated The `Convention` object for this task. A `Plugin` can use the convention object to contribute properties and methods to this task.
`dependsOn` | The dependencies of this task.
`description` | The description of this task.
`destroyables` | The destroyables of this task.
`didWork` | Checks if the task actually did any work. Even if a Task executes, it may determine that it has nothing to do. For example, a compilation task may determine that source files have not changed since the last time a the task was run.
`distributionBase` | The distribution base specifies whether the unpacked wrapper distribution should be stored in the project or in the gradle user home dir.
`distributionPath` | The path where the gradle distributions needed by the wrapper are unzipped. The path is relative to the distribution base directory
`distributionType` | The type of the Gradle distribution to be used by the wrapper.
`distributionUrl` | The URL to download the gradle distribution from.
`enabled` | Returns if this task is enabled or not.
`extensions` | The container of extensions.
`finalizedBy` | Returns tasks that finalize this task.
`gradleVersion` | The gradle version for the wrapper.
`group` | The task group which this task belongs to. The task group is used in reports and user interfaces to group related tasks together when presenting a list of tasks to the user.
`inputs` | The inputs of this task.
`jarFile` | The file to write the wrapper jar file to.
`localState` | The local state of this task.
`logger` | The logger for this task. You can use this in your build file to write log messages.
`logging` | The `LoggingManager` which can be used to receive logging and to control the standard output/error capture for this task. By default, System.out is redirected to the Gradle logging system at the QUIET log level, and System.err is redirected at the ERROR log level.
`mustRunAfter` | Returns tasks that this task must run after.
`name` | The name of this task. The name uniquely identifies the task within its `Project`.
`networkTimeout` | Incubating The network timeout specifies how many ms to wait for when the wrapper is performing network operations, such as downloading the wrapper jar.
`outputs` | The outputs of this task.
`path` | The path of the task, which is a fully qualified name for the task. The path of a task is the path of its `Project` plus the name of the task, separated by `:`.
`project` | The `Project` which this task belongs to.
`propertiesFile` | The file to write the wrapper properties to.
`scriptFile` | The file to write the wrapper script to.
`shouldRunAfter` | Returns tasks that this task should run after.
`state` | The execution state of this task. This provides information about the execution of this task, such as whether it has executed, been skipped, has failed, etc.
`taskDependencies` | Returns a `TaskDependency` which contains all the tasks that this task depends on.
`temporaryDir` | Returns a directory which this task can use to write temporary files to. Each task instance is provided with a separate temporary directory. There are no guarantees that the contents of this directory will be kept beyond the execution of the task.
`timeout` | The timeout of this task.

### Methods

Method | Description
`dependsOn(paths)` | Adds the given dependencies to this task. See here for a description of the types of objects which can be used as task dependencies.
`doFirst(action)` | Adds the given closure to the beginning of this task's action list. The closure is passed this task as a parameter when executed.
`doFirst(actionName, action)` | Adds the given `Action` to the beginning of this task's action list.
`doFirst(action)` | Adds the given `Action` to the beginning of this task's action list.
`doLast(action)` | Adds the given closure to the end of this task's action list. The closure is passed this task as a parameter when executed.
`doLast(actionName, action)` | Adds the given `Action` to the end of this task's action list.
`doLast(action)` | Adds the given `Action` to the end of this task's action list.
`doNotTrackState(reasonNotToTrackState)` | Incubating Do not track the state of the task. Instructs Gradle to treat the task as untracked.
`finalizedBy(paths)` | Adds the given finalizer tasks for this task.
`hasProperty(propertyName)` | Determines if this task has the given property. See here for details of the properties which are available for a task.
`mustRunAfter(paths)` | Specifies that this task must run after all of the supplied tasks.
`onlyIf(onlyIfClosure)` | Execute the task only if the given closure returns true. The closure will be evaluated at task execution time, not during configuration. The closure will be passed a single parameter, this task. If the closure returns false, the task will be skipped.
`onlyIf(onlyIfReason, onlyIfSpec)` | Incubating Execute the task only if the given spec is satisfied. The spec will be evaluated at task execution time, not during configuration. If the Spec is not satisfied, the task will be skipped.
`onlyIf(onlyIfSpec)` | Execute the task only if the given spec is satisfied. The spec will be evaluated at task execution time, not during configuration. If the Spec is not satisfied, the task will be skipped.
`property(propertyName)` | Returns the value of the given property of this task. This method locates a property as follows:
`setProperty(name, value)` | Sets a property of this task. This method searches for a property with the given name in the following locations, and sets the property on the first location where it finds the property.
`shouldRunAfter(paths)` | Specifies that this task should run after all of the supplied tasks.
`usesService(service)` | Incubating Registers a `BuildService` that is used by this task so `BuildServiceRegistration.getMaxParallelUsages()` can be honored.

### Script blocks

No script blocks

### Property details

#### ``List`<`Action`<? super `Task`>>` `actions`

The sequence of `Action` objects which will be executed by this task, in the order of execution.

#### `AntBuilder` `ant` (read-only)

The `AntBuilder` for this task. You can use this in your build file to execute ant tasks.

#### `PathBase` `archiveBase`

The archive base specifies whether the unpacked wrapper distribution should be stored in the project or in the gradle user home dir.

Default:
  `PathBase.GRADLE_USER_HOME`

#### `String` `archivePath`

The path where the gradle distributions archive should be saved (i.e. the parent dir). The path is relative to the archive base directory.

Default:
  `'wrapper/dists'`

#### `Convention` `convention` (read-only)

Note: This property is deprecated and will be removed in the next major version of Gradle.

The `Convention` object for this task. A `Plugin` can use the convention object to contribute properties and methods to this task.

#### ``Set`<`Object`>` `dependsOn`

The dependencies of this task.

#### `String` `description`

The description of this task.

#### `TaskDestroyables` `destroyables` (read-only)

The destroyables of this task.

#### `boolean` `didWork`

Checks if the task actually did any work. Even if a Task executes, it may determine that it has nothing to do. For example, a compilation task may determine that source files have not changed since the last time a the task was run.

#### `PathBase` `distributionBase`

The distribution base specifies whether the unpacked wrapper distribution should be stored in the project or in the gradle user home dir.

Default:
  `PathBase.GRADLE_USER_HOME`

#### `String` `distributionPath`

The path where the gradle distributions needed by the wrapper are unzipped. The path is relative to the distribution base directory

Default:
  `'wrapper/dists'`

#### `DistributionType` `distributionType`

The type of the Gradle distribution to be used by the wrapper.

Default:
  `DistributionType.BIN`

#### `String` `distributionUrl`

The URL to download the gradle distribution from.

If not set, the download URL is the default for the specified `Wrapper.getGradleVersion()`.

If `Wrapper.getGradleVersion()` is not set, will return null.

The wrapper downloads a certain distribution only once and caches it. If your distribution base is the project, you might submit the distribution to your version control system. That way no download is necessary at all. This might be in particular interesting, if you provide a custom gradle snapshot to the wrapper, because you don't need to provide a download server then.

Default:
  `"http\://services.gradle.org/distributions/gradle-${gradleVersion}-bin.zip"` (or `"http\://services.gradle.org/distributions-snapshots/gradle-${gradleVersion}-bin.zip"` for snapshot versions).

#### `boolean` `enabled`

Returns if this task is enabled or not.

#### `ExtensionContainer` `extensions` (read-only)

The container of extensions.

#### `TaskDependency` `finalizedBy`

Returns tasks that finalize this task.

#### `String` `gradleVersion`

The gradle version for the wrapper.

Default:
  `gradle.gradleVersion`

#### `String` `group`

The task group which this task belongs to. The task group is used in reports and user interfaces to group related tasks together when presenting a list of tasks to the user.

#### `TaskInputs` `inputs` (read-only)

The inputs of this task.

#### `File` `jarFile`

The file to write the wrapper jar file to.

Default:
  ``${project.projectDir}`/gradle/wrapper/gradle-wrapper.jar`

#### `TaskLocalState` `localState` (read-only)

The local state of this task.

#### `Logger` `logger` (read-only)

The logger for this task. You can use this in your build file to write log messages.

#### `LoggingManager` `logging` (read-only)

The `LoggingManager` which can be used to receive logging and to control the standard output/error capture for this task. By default, System.out is redirected to the Gradle logging system at the QUIET log level, and System.err is redirected at the ERROR log level.

#### `TaskDependency` `mustRunAfter`

Returns tasks that this task must run after.

#### `String` `name` (read-only)

The name of this task. The name uniquely identifies the task within its `Project`.

#### ``Property`<`Integer`>` `networkTimeout`

Note: This property is incubating and may change in a future version of Gradle.

The network timeout specifies how many ms to wait for when the wrapper is performing network operations, such as downloading the wrapper jar.

Default:
  `10000`ms

#### `TaskOutputs` `outputs` (read-only)

The outputs of this task.

#### `String` `path` (read-only)

The path of the task, which is a fully qualified name for the task. The path of a task is the path of its `Project` plus the name of the task, separated by `:`.

#### `Project` `project` (read-only)

The `Project` which this task belongs to.

Calling this method from a task action is not supported when configuration caching is enabled.

#### `File` `propertiesFile` (read-only)

The file to write the wrapper properties to.

Default:
  `jarFile`, replacing `.jar` with `.properties`

#### `File` `scriptFile`

The file to write the wrapper script to.

Default:
  ``${project.projectDir}`/gradlew`

#### `TaskDependency` `shouldRunAfter`

Returns tasks that this task should run after.

#### `TaskState` `state` (read-only)

The execution state of this task. This provides information about the execution of this task, such as whether it has executed, been skipped, has failed, etc.

#### `TaskDependency` `taskDependencies` (read-only)

Returns a `TaskDependency` which contains all the tasks that this task depends on.

Calling this method from a task action is not supported when configuration caching is enabled.

#### `File` `temporaryDir` (read-only)

Returns a directory which this task can use to write temporary files to. Each task instance is provided with a separate temporary directory. There are no guarantees that the contents of this directory will be kept beyond the execution of the task.

#### ``Property`<`Duration`>` `timeout`

The timeout of this task.

    task myTask {
        timeout = Duration.ofMinutes(10)
    }

The Thread executing this task will be interrupted if the task takes longer than the specified amount of time to run. In order for a task to work properly with this feature, it needs to react to interrupts and must clean up any resources it opened.

By default, tasks never time out.

### Method details

#### `Task` `dependsOn`(``Object`...` paths)

Adds the given dependencies to this task. See here for a description of the types of objects which can be used as task dependencies.

#### `Task` `doFirst`(`Closure` action)

Adds the given closure to the beginning of this task's action list. The closure is passed this task as a parameter when executed.

#### `Task` `doFirst`(`String` actionName, ``Action`<? super `Task`>` action)

Adds the given `Action` to the beginning of this task's action list.

#### `Task` `doFirst`(``Action`<? super `Task`>` action)

Adds the given `Action` to the beginning of this task's action list.

#### `Task` `doLast`(`Closure` action)

Adds the given closure to the end of this task's action list. The closure is passed this task as a parameter when executed.

#### `Task` `doLast`(`String` actionName, ``Action`<? super `Task`>` action)

Adds the given `Action` to the end of this task's action list.

#### `Task` `doLast`(``Action`<? super `Task`>` action)

Adds the given `Action` to the end of this task's action list.

#### `void` `doNotTrackState`(`String` reasonNotToTrackState)

Note: This method is incubating and may change in a future version of Gradle.

Do not track the state of the task. Instructs Gradle to treat the task as untracked.

#### `Task` `finalizedBy`(``Object`...` paths)

Adds the given finalizer tasks for this task.

    task taskY {
        finalizedBy "taskX"
    }

See here for a description of the types of objects which can be used to specify a finalizer task.

#### `boolean` `hasProperty`(`String` propertyName)

Determines if this task has the given property. See here for details of the properties which are available for a task.

#### `Task` `mustRunAfter`(``Object`...` paths)

Specifies that this task must run after all of the supplied tasks.

    task taskY {
        mustRunAfter "taskX"
    }

For each supplied task, this action adds a task 'ordering', and does not specify a 'dependency' between the tasks. As such, it is still possible to execute 'taskY' without first executing the 'taskX' in the example.

See here for a description of the types of objects which can be used to specify an ordering relationship.

#### `void` `onlyIf`(`Closure` onlyIfClosure)

Execute the task only if the given closure returns true. The closure will be evaluated at task execution time, not during configuration. The closure will be passed a single parameter, this task. If the closure returns false, the task will be skipped.

You may add multiple such predicates. The task is skipped if any of the predicates return false.

Typical usage:`myTask.onlyIf { isProductionEnvironment() }`

#### `void` `onlyIf`(`String` onlyIfReason, ``Spec`<? super `Task`>` onlyIfSpec)

Note: This method is incubating and may change in a future version of Gradle.

Execute the task only if the given spec is satisfied. The spec will be evaluated at task execution time, not during configuration. If the Spec is not satisfied, the task will be skipped.

You may add multiple such predicates. The task is skipped if any of the predicates return false.

Typical usage (from Java):

    myTask.onlyIf("run only in production environment", new Spec<Task>() {
       boolean isSatisfiedBy(Task task) {
          return isProductionEnvironment();
       }
    });

#### `void` `onlyIf`(``Spec`<? super `Task`>` onlyIfSpec)

Execute the task only if the given spec is satisfied. The spec will be evaluated at task execution time, not during configuration. If the Spec is not satisfied, the task will be skipped.

You may add multiple such predicates. The task is skipped if any of the predicates return false.

Typical usage (from Java):

    myTask.onlyIf(new Spec<Task>() {
       boolean isSatisfiedBy(Task task) {
          return isProductionEnvironment();
       }
    });

#### `Object` `property`(`String` propertyName)

Returns the value of the given property of this task. This method locates a property as follows:

1. If this task object has a property with the given name, return the value of the property.
2. If this task has an extension with the given name, return the extension.
3. If this task's convention object has a property with the given name, return the value of the property.
4. If this task has an extra property with the given name, return the value of the property.
5. If not found, throw `MissingPropertyException`

#### `void` `setProperty`(`String` name, `Object` value)

Sets a property of this task. This method searches for a property with the given name in the following locations, and sets the property on the first location where it finds the property.

1. The task object itself. For example, the `enabled` project property.
2. The task's convention object.
3. The task's extra properties.

If the property is not found, a `MissingPropertyException` is thrown.

#### `TaskDependency` `shouldRunAfter`(``Object`...` paths)

Specifies that this task should run after all of the supplied tasks.

    task taskY {
        shouldRunAfter "taskX"
    }

For each supplied task, this action adds a task 'ordering', and does not specify a 'dependency' between the tasks. As such, it is still possible to execute 'taskY' without first executing the 'taskX' in the example.

See here for a description of the types of objects which can be used to specify an ordering relationship.

#### `void` `usesService`(``Provider`<? extends `BuildService`<?>>` service)

Note: This method is incubating and may change in a future version of Gradle.

Registers a `BuildService` that is used by this task so `BuildServiceRegistration.getMaxParallelUsages()` can be honored.