Extensions > API reference > java_common

java_common

Utilities for Java compilation support in Starlark.

Members

compile
JavaRuntimeInfo
JavaToolchainInfo
make_non_strict
merge
pack_sources
provider
run_ijar
stamp_jar

compile

JavaInfo java_common.compile(ctx, *, source_jars=[], source_files=[], output, output_source_jar=None, javac_opts=[], deps=[], exports=[], plugins=[], exported_plugins=[], annotation_processor_additional_inputs=[], annotation_processor_additional_outputs=[], strict_deps='ERROR', java_toolchain, host_javabase, 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`	`ctx` The rule context.
`source_jars`	`sequence of Files` 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` A list of the Java source files to be compiled. At least one of source_jars or source_files should be specified.
`output`	`File`
`output_source_jar`	`File` The output source jar. Optional. Defaults to `{output_jar}-src.jar` if unset.
`javac_opts`	`sequence of strings` A list of the desired javac options. Optional.
`deps`	`sequence of JavaInfos` A list of dependencies. Optional.
`exports`	`sequence of JavaInfos` A list of exports. Optional.
`plugins`	`sequence of JavaInfos` A list of plugins. Optional.
`exported_plugins`	`sequence of JavaInfos` A list of exported plugins. Optional.
`annotation_processor_additional_inputs`	`sequence of Files` 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` A list of outputs that the Java compilation action will output in addition to the class jar from annotation processing.
`strict_deps`	`string` 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`	`JavaToolchainInfo` A JavaToolchainInfo to be used for this compilation. Mandatory.
`host_javabase`	`JavaRuntimeInfo` A JavaRuntimeInfo to be used for this compilation. Mandatory.
`sourcepath`	`sequence of Files`
`resources`	`sequence of Files`
`neverlink`	`bool`

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

Parameter	Description
`java_info`	`JavaInfo` The java info.

java_info

JavaInfo

The java info.

merge

JavaInfo java_common.merge(providers)

Merges the given providers into a single JavaInfo.

Parameters

Parameter Description

Parameter	Description
`providers`	`sequence of JavaInfos` The list of providers to merge.

providers

sequence of JavaInfos

The list of providers to merge.

pack_sources

File java_common.pack_sources(actions, *, output_jar, sources=[], source_jars=[], java_toolchain, host_javabase)

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

JavaInfo#source_jar

Parameters

Parameter	Description
`actions`	`actions` ctx.actions
`output_jar`	`File` The output jar of the rule. Used to name the resulting source jar.
`sources`	`sequence of Files` A list of Java source files to be packed into the source jar.
`source_jars`	`sequence of Files` A list of source jars to be packed into the source jar.
`java_toolchain`	`JavaToolchainInfo` A JavaToolchainInfo to used to find the ijar tool.
`host_javabase`	`JavaRuntimeInfo` A JavaRuntimeInfo to be used for packing sources.

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`	`actions` ctx.actions
`jar`	`File` The jar to run ijar on.
`target_label`	`Label` 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`	`JavaToolchainInfo` 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` ctx.actions
`jar`	`File` The jar to run stamp_jar on.
`target_label`	`Label` 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`	`JavaToolchainInfo` A JavaToolchainInfo to used to find the stamp_jar tool.