java\_common

Utilities for Java compilation support in Starlark.

Members

• BootClassPathInfo
• compile
• JavaRuntimeInfo
• JavaToolchainInfo
• merge
• pack_sources
• run_ijar
• stamp_jar

BootClassPathInfo

Provider java_common.BootClassPathInfo

The provider used to supply bootclasspath information

compile

struct java_common.compile(ctx, *, source_jars=[], source_files=[], output, output_source_jar=None, javac_opts=[], deps=[], runtime_deps=[], exports=[], plugins=[], exported_plugins=[], native_libraries=[], annotation_processor_additional_inputs=[], annotation_processor_additional_outputs=[], strict_deps='ERROR', java_toolchain, bootclasspath=None, sourcepath=[], resources=[], resource_jars=[], classpath_resources=[], neverlink=False, enable_annotation_processing=True, enable_compile_jar_action=True, add_exports=[], add_opens=[])

Compiles Java source files/jars from the implementation of a Starlark rule and returns a provider that represents the results of the compilation and can be added to the set of providers emitted by this rule.

Parameters

Parameter	Description
ctx	ctx; required The rule context.
source_jars	sequence of Files; default is [] A list of the jars to be compiled. At least one of source_jars or source_files should be specified.
source_files	sequence of Files; default is [] A list of the Java source files to be compiled. At least one of source_jars or source_files should be specified.
output	File; required
output_source_jar	File; or None; default is None The output source jar. Defaults to {output\_jar}-src.jar if unset.
javac_opts	sequence of strings; default is [] A list of the desired javac options.
deps	sequence of structs; default is [] A list of dependencies.
runtime_deps	sequence of structs; default is [] A list of runtime dependencies.
exports	sequence of structs; default is [] A list of exports.
plugins	sequence of structs; or sequence of structs; default is [] A list of plugins.
exported_plugins	sequence of structs; or sequence of structs; default is [] A list of exported plugins.
native_libraries	sequence of CcInfos; default is [] CC native library dependencies that are needed for this library.
annotation_processor_additional_inputs	sequence of Files; default is [] A list of inputs that the Java compilation action will take in addition to the Java sources for annotation processing.
annotation_processor_additional_outputs	sequence of Files; default is [] A list of outputs that the Java compilation action will output in addition to the class jar from annotation processing.
strict_deps	string; default is 'ERROR' A string that specifies how to handle strict deps. Possible values: ‘OFF’, ‘ERROR’, ‘WARN’ and ‘DEFAULT’. For more details see --strict_java_deps flag. By default ‘ERROR’.
java_toolchain	Info; required A JavaToolchainInfo to be used for this compilation. Mandatory.
bootclasspath	default is None A BootClassPathInfo to be used for this compilation. If present, overrides the bootclasspath associated with the provided java_toolchain.
sourcepath	sequence of Files; default is []
resources	sequence of Files; default is []
resource_jars	sequence of Files; default is []
classpath_resources	sequence of Files; default is []
neverlink	bool; default is False
enable_annotation_processing	bool; default is True Disables annotation processing in this compilation, causing any annotation processors provided in plugins or in exported_plugins of deps to be ignored.
enable_compile_jar_action	bool; default is True Enables header compilation or ijar creation. If set to False, it forces use of the full class jar in the compilation classpaths of any dependants. Doing so is intended for use by non-library targets such as binaries that do not have dependants.
add_exports	sequence of strings; default is [] Allow this library to access the given /.
add_opens	sequence of strings; default is [] Allow this library to reflectively access the given /.

JavaRuntimeInfo

Provider java_common.JavaRuntimeInfo

The key used to retrieve the provider that contains information about the Java runtime being used.

JavaToolchainInfo

Provider java_common.JavaToolchainInfo

The key used to retrieve the provider that contains information about the Java toolchain being used.

merge

struct java_common.merge(providers)

Merges the given providers into a single JavaInfo.

Parameters

Parameter	Description
providers	sequence of structs; required The list of providers to merge.

pack_sources

File java_common.pack_sources(actions, *, output_source_jar=None, sources=[], source_jars=[], java_toolchain)

Packs sources and source jars into a single source jar file. The return value is typically passed to

JavaInfo#source_jar

.At least one of parameters output_jar or output_source_jar is required.

Parameters

Parameter	Description
actions	actions; required ctx.actions
output_source_jar	File; or None; default is None The output source jar.
sources	sequence of Files; default is [] A list of Java source files to be packed into the source jar.
source_jars	sequence of Files; default is [] A list of source jars to be packed into the source jar.
java_toolchain	Info; required A JavaToolchainInfo to used to find the ijar tool.

run_ijar

File java_common.run_ijar(actions, *, jar, target_label=None, java_toolchain)

Runs ijar on a jar, stripping it of its method bodies. This helps reduce rebuilding of dependent jars during any recompiles consisting only of simple changes to method implementations. The return value is typically passed to JavaInfo#compile_jar.

Parameters

Parameter	Description
actions	actions; required ctx.actions
jar	File; required The jar to run ijar on.
target_label	Label; or None; default is None A target label to stamp the jar with. Used for add_dep support. Typically, you would pass ctx.label to stamp the jar with the current rule’s label.
java_toolchain	Info; required A JavaToolchainInfo to used to find the ijar tool.

stamp_jar

File java_common.stamp_jar(actions, *, jar, target_label, java_toolchain)

Stamps a jar with a target label for add_dep support. The return value is typically passed to JavaInfo#compile_jar. Prefer to use run_ijar when possible.

Parameters

Parameter	Description
actions	actions; required ctx.actions
jar	File; required The jar to run stamp_jar on.
target_label	Label; required A target label to stamp the jar with. Used for add_dep support. Typically, you would pass ctx.label to stamp the jar with the current rule’s label.
java_toolchain	Info; required A JavaToolchainInfo to used to find the stamp_jar tool.