Create placeholder utilities for finding Java toolchains
following the example of find_cpp_toolchain.
PiperOrigin-RevId: 232315915
diff --git a/tools/jdk/BUILD b/tools/jdk/BUILD
index a0bb4a6..9e15088 100644
--- a/tools/jdk/BUILD
+++ b/tools/jdk/BUILD
@@ -337,6 +337,7 @@
"proguard_whitelister.py",
"proguard_whitelister_test.py",
"proguard_whitelister_test_input.cfg",
+ "toolchain_utils.bzl",
],
)
diff --git a/tools/jdk/toolchain_utils.bzl b/tools/jdk/toolchain_utils.bzl
new file mode 100644
index 0000000..5150cb2
--- /dev/null
+++ b/tools/jdk/toolchain_utils.bzl
@@ -0,0 +1,64 @@
+# Copyright 2019 The Bazel Authors. All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""
+Finds the Java toolchain.
+
+Returns the toolchain if enabled, and falls back to a toolchain constructed from
+legacy toolchain selection.
+"""
+
+def find_java_toolchain(ctx, target):
+ """
+ Finds the Java toolchain.
+
+ If the Java toolchain is in use, returns it. Otherwise, returns a Java
+ toolchain derived from legacy toolchain selection.
+
+ Args:
+ ctx: The rule context for which to find a toolchain.
+ target: A java_toolchain target (for legacy toolchain resolution).
+
+ Returns:
+ A JavaToolchainInfo.
+ """
+
+ _ignore = [ctx]
+
+ # TODO(b/122482627): implement toolcahin resolution for Java
+ # see https://github.com/bazelbuild/bazel/issues/6521
+
+ return target
+
+def find_java_runtime_toolchain(ctx, target):
+ """
+ Finds the Java runtime.
+
+ If the Java toolchain is in use, returns it. Otherwise, returns a Java
+ runtime derived from legacy toolchain selection.
+
+ Args:
+ ctx: The rule context for which to find a toolchain.
+ target: A java_runtime target (for legacy toolchain resolution).
+
+ Returns:
+ A JavaRuntimeInfo.
+ """
+
+ _ignore = [ctx]
+
+ # TODO(b/122482627): implement toolcahin resolution for Java
+ # see https://github.com/bazelbuild/bazel/issues/6521
+
+ return target
