Fix unused_deps_mode attribute crash on older Bazel versions

Author: JonathanPerry651

java/common/rules/impl/basic_java_library_impl.bzl

@@ -110,6 +110,7 @@ def basic_java_library(
       add_opens: (list[str]) Allow this library to reflectively access the given <module>/<package>.
       bootclasspath: (Target) The JDK APIs to compile this library against.
       javabuilder_jvm_flags: (list[str]) Additional JVM flags to pass to JavaBuilder.
+      unused_deps_mode: (str) Unused dependency checking mode.
       is_library: (bool) Whether the target is a library. Primarily for static analysis purposes.
       disable_lint_checks: (list[str]) A list of AndroidLint checks to be skipped.
     Returns:

java/common/rules/impl/bazel_java_library_impl.bzl

@@ -60,6 +60,7 @@ def bazel_java_library_rule(
       add_opens: (list[str]) Allow this library to reflectively access the given <module>/<package>.
       bootclasspath: (Target) The JDK APIs to compile this library against.
       javabuilder_jvm_flags: (list[str]) Additional JVM flags to pass to JavaBuilder.
+      unused_deps_mode: (str) Unused dependency checking mode.
       disable_lint_checks: (list[str]) A list of AndroidLint checks to be skipped.
     Returns:
       (dict[str, provider]) A list containing DefaultInfo, JavaInfo,

java/common/rules/impl/compile_action.bzl

@@ -116,6 +116,7 @@ def compile_action(
         Possible values: 'OFF', 'ERROR', 'WARN' and 'DEFAULT'. For more details
         see https://bazel.build/docs/user-manual#strict-java-deps.
         By default 'ERROR'.
+      unused_deps_mode: (str) Unused dependency checking mode.
       enable_compile_jar_action: (bool) 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

java/private/BUILD

@@ -38,6 +38,7 @@ bzl_library(
         "//java/common:semantics_bzl",
         "//java/common/rules:java_helper_bzl",
         "//java/common/rules:toolchain_rules",
+        "@bazel_features//:features",
         "@bazel_skylib//lib:paths",
         "@bazel_skylib//rules:common_settings",
         "@rules_cc//cc:find_cc_toolchain_bzl",

java/private/java_common_internal.bzl

@@ -14,6 +14,11 @@
 
 """ Private utilities for Java compilation support in Starlark. """
 
+load(
+    "@bazel_features//private:util.bzl",
+    "BAZEL_VERSION",
+    _bazel_version_ge = "ge",
+)
 load("@bazel_skylib//lib:paths.bzl", "paths")
 load("//java/common:java_semantics.bzl", "semantics")
 load("//java/common/rules:java_helper.bzl", "helper")
@@ -27,6 +32,8 @@ load(
 )
 load(":native.bzl", "get_internal_java_common")
 
+_HAS_UNUSED_DEPS_MODE = BAZEL_VERSION[0] == [999999, 999999, 999999] or _bazel_version_ge("9.2.0")
+
 # copybara: default multiline visibility
 
 _STRICT_DEPS_VALUES = [
@@ -195,6 +202,7 @@ def compile(
             compilation action will output in addition to the class jar from annotation processing.
         strict_deps: (str) A string that specifies how to handle strict deps. Possible values:
             'OFF', 'ERROR', 'WARN' and 'DEFAULT'.
+        unused_deps_mode: (str) Unused dependency checking mode.
         bootclasspath: (BootClassPathInfo) If present, overrides the bootclasspath associated with
             the provided java_toolchain. Optional.
         javabuilder_jvm_flags: (list[str]) Additional JVM flags to pass to JavaBuilder.
@@ -315,6 +323,10 @@ def compile(
     if uses_annotation_processing:
         generated_class_jar = _derive_output_file(ctx, output, name_suffix = "-gen")
         generated_source_jar = _derive_output_file(ctx, output, name_suffix = "-gensrc")
+    compilation_action_kwargs = {}
+    if _HAS_UNUSED_DEPS_MODE:
+        compilation_action_kwargs["unused_deps_mode"] = unused_deps_mode
+
     get_internal_java_common().create_compilation_action(
         ctx,
         java_toolchain,
@@ -344,7 +356,7 @@ def compile(
         enable_direct_classpath,
         annotation_processor_additional_inputs,
         annotation_processor_additional_outputs,
-        unused_deps_mode = unused_deps_mode,
+        **compilation_action_kwargs
     )
 
     create_output_source_jar = len(source_files) > 0 or source_jars != [output_source_jar]