Extensions > API reference > java_common

java_common

Utilities for Java compilation support in Starlark.

BootClassPathInfo

Provider java_common.BootClassPathInfo

The provider used to supply bootclasspath information

compile

JavaInfo 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, host_javabase=None, sourcepath=[], resources=[], neverlink=False, enable_annotation_processing=True, enable_compile_jar_action=True)

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	required The rule context.
source_jars	sequence of Files; default = [] 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 = [] A list of the Java source files to be compiled. At least one of source_jars or source_files should be specified.
output	required
output_source_jar	File; or None; default = None The output source jar. Optional. Defaults to `{output_jar}-src.jar` if unset.
javac_opts	sequence of strings; default = [] A list of the desired javac options. Optional.
deps	sequence of JavaInfos; default = [] A list of dependencies. Optional.
runtime_deps	sequence of JavaInfos; default = [] A list of runtime dependencies. Optional.
exports	sequence of JavaInfos; default = [] A list of exports. Optional.
plugins	sequence of JavaPluginInfos; or sequence of JavaInfos; default = [] A list of plugins. Optional.
exported_plugins	sequence of JavaPluginInfos; or sequence of JavaInfos; default = [] A list of exported plugins. Optional.
native_libraries	sequence of CcInfos; default = [] CC native library dependencies that are needed for this library.
annotation_processor_additional_inputs	sequence of Files; default = [] 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 = [] A list of outputs that the Java compilation action will output in addition to the class jar from annotation processing.
strict_deps	default = 'ERROR' A string that specifies how to handle strict deps. Possible values: 'OFF', 'ERROR', 'WARN' and 'DEFAULT'. For more details see https://docs.bazel.build/versions/main/bazel-user-manual.html#flag--strict_java_deps. By default 'ERROR'.
java_toolchain	required A JavaToolchainInfo to be used for this compilation. Mandatory.
host_javabase	default = None Deprecated. This parameter is deprecated and will be removed soon. Please do not depend on it. It is disabled with --+incompatible_java_common_parameters. Use this flag to verify your code is compatible with its imminent removal. Deprecated: You can drop this parameter (host_javabase is provided with java_toolchain)
sourcepath	sequence of Files; default = []
resources	sequence of Files; default = []
neverlink	default = False
enable_annotation_processing	default = 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	default = 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.

JavaPluginInfo

Provider java_common.JavaPluginInfo

The key used to retrieve the provider that contains information about the Java plugins. The same value is accessible as JavaPluginInfo.
Prefer using JavaPluginInfo in new code.

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.

make_non_strict

JavaInfo java_common.make_non_strict(java_info)

Returns a new Java provider whose direct-jars part is the union of both the direct and indirect jars of the given Java provider.

Parameters

Parameter	Description
java_info	required The java info.

merge

JavaInfo java_common.merge(providers)

Merges the given providers into a single JavaInfo.

Parameters

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

pack_sources

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

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	required ctx.actions
output_jar	File; or None; default = None Deprecated. This parameter is deprecated and will be removed soon. Please do not depend on it. It is disabled with --+incompatible_java_common_parameters. Use this flag to verify your code is compatible with its imminent removal. Deprecated: The output jar of the rule. Used to name the resulting source jar. The parameter sets output_source_jar parameter to `{output_jar}-src.jar`.Use output_source_jar parameter directly instead.
output_source_jar	File; or None; default = None The output source jar.
sources	sequence of Files; default = [] A list of Java source files to be packed into the source jar.
source_jars	sequence of Files; default = [] A list of source jars to be packed into the source jar.
java_toolchain	required A JavaToolchainInfo to used to find the ijar tool.
host_javabase	default = None Deprecated. This parameter is deprecated and will be removed soon. Please do not depend on it. It is disabled with --+incompatible_java_common_parameters. Use this flag to verify your code is compatible with its imminent removal. Deprecated: You can drop this parameter (host_javabase is provided with java_toolchain)

May return None.

provider

Provider java_common.provider

Returns the Java declared provider.
The same value is accessible as JavaInfo.
Prefer using JavaInfo in new code.

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	required ctx.actions
jar	required The jar to run ijar on.
target_label	Label; or None; default = 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	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	required ctx.actions
jar	required The jar to run stamp_jar on.
target_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	required A JavaToolchainInfo to used to find the stamp_jar tool.

to_java_binary_info

JavaInfo java_common.to_java_binary_info(java_info)

Returns a copy of the given JavaInfo with minimal info returned by a java_binary

Parameters

Parameter	Description
java_info	required The JavaInfo to enhance.