# CompileOptions

API Documentation: | `CompileOptions`

Main options for Java compilation.

### Properties

Property | Description
`annotationProcessorGeneratedSourcesDirectory` | Replaced The directory to place source files generated by annotation processors.
`annotationProcessorPath` | The classpath to use to load annotation processors. This path is also used for annotation processor discovery.
`bootstrapClasspath` | The bootstrap classpath to be used for the compiler process. Defaults to `null`.
`compilerArgs` | Returns any additional arguments to be passed to the compiler. Defaults to the empty list. Compiler arguments not supported by the DSL can be added here. For example, it is possible to pass the `--release` option of JDK 9:
`compilerArgumentProviders` | Compiler argument providers.
`debug` | Tells whether to include debugging information in the generated class files. Defaults to `true`. See `DebugOptions.getDebugLevel()` for which debugging information will be generated.
`debugOptions` | Returns options for generating debugging information.
`deprecation` | Tells whether to log details of usage of deprecated members or classes. Defaults to `false`.
`encoding` | The character encoding to be used when reading source files. Defaults to `null`, in which case the platform default encoding will be used.
`extensionDirs` | The extension dirs to be used for the compiler process. Defaults to `null`.
`failOnError` | Tells whether to fail the build when compilation fails. Defaults to `true`.
`fork` | Tells whether to run the compiler in its own process. Note that this does not necessarily mean that a new process will be created for each compile task. Defaults to `false`.
`forkOptions` | Returns options for running the compiler in a child process.
`headerOutputDirectory` | If this option is set to a non-null directory, it will be passed to the Java compiler's `-h` option, prompting it to generate native headers to that directory.
`incremental` | informs whether to use incremental compilation feature. See `CompileOptions.setIncremental(boolean)`
`listFiles` | Tells whether to log the files to be compiled. Defaults to `false`.
`sourcepath` | The source path to use for the compilation.
`verbose` | Tells whether to produce verbose output. Defaults to `false`.
`warnings` | Tells whether to log warning messages. The default is `true`.

### Methods

Method | Description
`debug(debugArgs)` | Convenience method to set `DebugOptions` with named parameter syntax. Calling this method will set `debug` to `true`.
`fork(forkArgs)` | Convenience method to set `ForkOptions` with named parameter syntax. Calling this method will set `fork` to `true`.

### Script blocks

No script blocks

### Property details

#### `File` `annotationProcessorGeneratedSourcesDirectory`

Note: This property has been replaced by generatedSourceOutputDirectory.

The directory to place source files generated by annotation processors.

Default with `java` plugin:
  ``${project.buildDir}`/generated/sources/annotationProcessor/`${sourceDirectorySet.name}`/`${sourceSet.name}``

#### `FileCollection` `annotationProcessorPath`

The classpath to use to load annotation processors. This path is also used for annotation processor discovery.

Default with `java` plugin:
  ``sourceSet`.annotationProcessorPath`

#### `FileCollection` `bootstrapClasspath`

The bootstrap classpath to be used for the compiler process. Defaults to `null`.

Default with `java` plugin:
  `null`

#### ``List`<`String`>` `compilerArgs`

Returns any additional arguments to be passed to the compiler. Defaults to the empty list. Compiler arguments not supported by the DSL can be added here. For example, it is possible to pass the `--release` option of JDK 9:

    compilerArgs.addAll(['--release', '7'])

Note that if `--release` is added then `-target` and `-source` are ignored.

Default with `java` plugin:
  `[]`

#### ``List`<`CommandLineArgumentProvider`>` `compilerArgumentProviders` (read-only)

Compiler argument providers.

Default with `java` plugin:
  `[]`

#### `boolean` `debug`

Tells whether to include debugging information in the generated class files. Defaults to `true`. See `DebugOptions.getDebugLevel()` for which debugging information will be generated.

Default with `java` plugin:
  `true`

#### `DebugOptions` `debugOptions`

Returns options for generating debugging information.

#### `boolean` `deprecation`

Tells whether to log details of usage of deprecated members or classes. Defaults to `false`.

Default with `java` plugin:
  `false`

#### `String` `encoding`

The character encoding to be used when reading source files. Defaults to `null`, in which case the platform default encoding will be used.

Default with `java` plugin:
  `null`

#### `String` `extensionDirs`

The extension dirs to be used for the compiler process. Defaults to `null`.

Default with `java` plugin:
  `null`

#### `boolean` `failOnError`

Tells whether to fail the build when compilation fails. Defaults to `true`.

Default with `java` plugin:
  `true`

#### `boolean` `fork`

Tells whether to run the compiler in its own process. Note that this does not necessarily mean that a new process will be created for each compile task. Defaults to `false`.

Default with `java` plugin:
  `false`

#### `ForkOptions` `forkOptions`

Returns options for running the compiler in a child process.

#### `DirectoryProperty` `headerOutputDirectory`

If this option is set to a non-null directory, it will be passed to the Java compiler's `-h` option, prompting it to generate native headers to that directory.

Default with `java` plugin:
  ``${project.buildDir}`/generated/sources/headers/`${sourceDirectorySet.name}`/`${sourceSet.name}``

#### `boolean` `incremental`

informs whether to use incremental compilation feature. See `CompileOptions.setIncremental(boolean)`

Default with `java` plugin:
  `true`

#### `boolean` `listFiles`

Tells whether to log the files to be compiled. Defaults to `false`.

Default with `java` plugin:
  `false`

#### `FileCollection` `sourcepath`

The source path to use for the compilation.

The source path indicates the location of source files that may be compiled if necessary. It is effectively a complement to the class path, where the classes to be compiled against are in source form. It does not indicate the actual primary source being compiled.

The source path feature of the Java compiler is rarely needed for modern builds that use dependency management.

The default value for the source path is `null`, which indicates an empty source path. Note that this is different to the default value for the `-sourcepath` option for `javac`, which is to use the value specified by `-classpath`. If you wish to use any source path, it must be explicitly set.

Default with `java` plugin:
  `null`

#### `boolean` `verbose`

Tells whether to produce verbose output. Defaults to `false`.

Default with `java` plugin:
  `false`

#### `boolean` `warnings`

Tells whether to log warning messages. The default is `true`.

Default with `java` plugin:
  `true`

### Method details

#### `CompileOptions` `debug`(``Map`<`String`, `Object`>` debugArgs)

Convenience method to set `DebugOptions` with named parameter syntax. Calling this method will set `debug` to `true`.

#### `CompileOptions` `fork`(``Map`<`String`, `Object`>` forkArgs)

Convenience method to set `ForkOptions` with named parameter syntax. Calling this method will set `fork` to `true`.