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# 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.
"""Experimental re-implementations of Java toolchain aliases using toolchain resolution."""
def _java_runtime_alias(ctx):
"""An experimental implementation of java_runtime_alias using toolchain resolution."""
if java_common.is_java_toolchain_resolution_enabled_do_not_use(ctx = ctx):
toolchain = ctx.toolchains["@bazel_tools//tools/jdk:runtime_toolchain_type"]
else:
toolchain = ctx.attr._java_runtime[java_common.JavaRuntimeInfo]
return [
toolchain,
platform_common.TemplateVariableInfo({
"JAVA": str(toolchain.java_executable_exec_path),
"JAVABASE": str(toolchain.java_home),
}),
# See b/65239471 for related discussion of handling toolchain runfiles/data.
DefaultInfo(
runfiles = ctx.runfiles(transitive_files = toolchain.files),
files = toolchain.files,
),
]
java_runtime_alias = rule(
implementation = _java_runtime_alias,
toolchains = ["@bazel_tools//tools/jdk:runtime_toolchain_type"],
attrs = {
"_java_runtime": attr.label(
default = Label("@bazel_tools//tools/jdk:legacy_current_java_runtime"),
),
},
)
def _java_host_runtime_alias(ctx):
"""An experimental implementation of java_host_runtime_alias using toolchain resolution."""
runtime = ctx.attr._runtime
return [
runtime[java_common.JavaRuntimeInfo],
runtime[platform_common.TemplateVariableInfo],
# Create a new DefaultInfo instead of propagating runtime[DefaultInfo]
# directly.
DefaultInfo(
files = runtime[DefaultInfo].files,
data_runfiles = runtime[DefaultInfo].data_runfiles,
default_runfiles = runtime[DefaultInfo].default_runfiles,
),
]
java_host_runtime_alias = rule(
implementation = _java_host_runtime_alias,
attrs = {
"_runtime": attr.label(
default = Label("@bazel_tools//tools/jdk:current_java_runtime"),
providers = [
java_common.JavaRuntimeInfo,
platform_common.TemplateVariableInfo,
],
cfg = "host",
),
},
)
def _java_toolchain_alias(ctx):
"""An experimental implementation of java_toolchain_alias using toolchain resolution."""
if java_common.is_java_toolchain_resolution_enabled_do_not_use(ctx = ctx):
toolchain = ctx.toolchains["@bazel_tools//tools/jdk:toolchain_type"]
else:
toolchain = ctx.attr._java_toolchain[java_common.JavaToolchainInfo]
return struct(
providers = [toolchain],
# Use the legacy provider syntax for compatibility with the native rules.
java_toolchain = toolchain,
)
java_toolchain_alias = rule(
implementation = _java_toolchain_alias,
toolchains = ["@bazel_tools//tools/jdk:toolchain_type"],
attrs = {
"_java_toolchain": attr.label(
default = Label("@bazel_tools//tools/jdk:legacy_current_java_toolchain"),
),
},
incompatible_use_toolchain_transition = True,
)
# Add aliases for the legacy native rules to allow referring to both versions in @bazel_tools//tools/jdk
legacy_java_toolchain_alias = native.java_toolchain_alias
legacy_java_runtime_alias = native.java_runtime_alias
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