Extensions > API reference > java_common

java_common

Utilities for Java compilation support in Starlark.

compile

JavaInfo java_common.compile(ctx, *, source_jars=[], source_files=[], output, output_source_jar=None, javac_opts=[], deps=[], experimental_local_compile_time_deps=[], exports=[], plugins=[], exported_plugins=[], annotation_processor_additional_inputs=[], annotation_processor_additional_outputs=[], strict_deps='ERROR', java_toolchain, host_javabase=None, sourcepath=[], resources=[], neverlink=False)

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.
experimental_local_compile_time_deps	sequence of JavaInfos; default = [] Experimental. This parameter is experimental and may change at any time. Please do not depend on it. It may be enabled on an experimental basis by setting ---experimental_google_legacy_api Compile-time dependencies of the compilation that should be omitted from the returned JavaInfo.
exports	sequence of JavaInfos; default = [] A list of exports. Optional.
plugins	sequence of JavaInfos; default = [] A list of plugins. Optional.
exported_plugins	sequence of JavaInfos; default = [] A list of exported plugins. Optional.
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/master/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

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.