build_defs/java_opts.bzl

"""Java options and protobuf-specific java build rules with those options."""

load("@rules_java//java:defs.bzl", "java_library")
load("@rules_jvm_external//:defs.bzl", "java_export")
load("//java/osgi:osgi.bzl", "osgi_java_library")
load("//:protobuf_version.bzl", "PROTOBUF_JAVA_VERSION")

JAVA_OPTS = [
    "-source 8",
    "-target 8",
    "-Xep:Java8ApiChecker:ERROR",
]

BUNDLE_DOC_URL = "https://developers.google.com/protocol-buffers/"
BUNDLE_LICENSE = "https://opensource.org/licenses/BSD-3-Clause"

def protobuf_java_export(**kwargs):
    java_export(
        javacopts = JAVA_OPTS,
        **kwargs
    )

def protobuf_java_library(**kwargs):
    java_library(
        javacopts = JAVA_OPTS,
        **kwargs
    )

def protobuf_versioned_java_library(
        bundle_description,
        bundle_name,
        bundle_symbolic_name,
        bundle_additional_imports = [],
        bundle_additional_exports = [],
        **kwargs):
    """Extends `java_library` to add OSGi headers to the MANIFEST.MF using bndlib

    This macro should be usable as a drop-in replacement for java_library.

    The additional arguments are given the bndlib tool to generate an OSGi-compliant manifest file.
    See [bnd documentation](https://bnd.bndtools.org/chapters/110-introduction.html)

    Takes all the args that are standard for a java_library target plus the following.
    Args:
        bundle_description: (required) The Bundle-Description header defines a short
            description of this bundle.
        bundle_name: (required) The Bundle-Name header defines a readable name for this
            bundle. This should be a short, human-readable name that can
            contain spaces.
        bundle_symbolic_name: (required) The Bundle-SymbolicName header specifies a
            non-localizable name for this bundle. The bundle symbolic name
            together with a version must identify a unique bundle though it can
            be installed multiple times in a framework. The bundle symbolic
            name should be based on the reverse domain name convention.
        bundle_additional_exports: The Export-Package header contains a
            declaration of exported packages. These are additional export
            package statements to be added before the default wildcard export
            "*;version={$Bundle-Version}".
        bundle_additional_imports: The Import-Package header declares the
            imported packages for this bundle. These are additional import
            package statements to be added before the default wildcard import
            "*".
        **kwargs: Additional key-word arguments that are passed to the internal
            java_library target.
    """
    osgi_java_library(
        javacopts = JAVA_OPTS,
        bundle_doc_url = BUNDLE_DOC_URL,
        bundle_license = BUNDLE_LICENSE,
        bundle_version = PROTOBUF_JAVA_VERSION,
        bundle_description = bundle_description,
        bundle_name = bundle_name,
        bundle_symbolic_name = bundle_symbolic_name,
        bundle_additional_exports = bundle_additional_exports,
        bundle_additional_imports = bundle_additional_imports + ["sun.misc;resolution:=optional"],
        **kwargs
    )