unplugged-system/build/bazel/rules/java/sdk/BUILD.bazel

# Copyright (C) 2023 The Android Open Source Project
#
# 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.

package(
    default_visibility = ["//visibility:public"],
)

load("@bazel_skylib//rules:common_settings.bzl", "int_setting", "string_setting")
load("//build/bazel/rules/common:sdk_version.bzl", "sdk_version")
load("//build/bazel/rules/common:api.bzl", "api")
load("//build/bazel/rules/java:versions.bzl", "java_versions")
load(":config_setting_names.bzl", "config_setting_names")
load("@bazel_skylib//lib:selects.bzl", "selects")
load("//prebuilts/sdk:utils.bzl", "prebuilt_sdk_utils")

string_setting(
    name = "kind",
    build_setting_default = sdk_version.KIND_PUBLIC,
    values = sdk_version.ALL_KINDS,
)

int_setting(
    name = "api_level",
    build_setting_default = api.FUTURE_API_LEVEL,
)

# The settings below are used to properly define a device java and android toolchain.

# The SDK_NONE config setting maps to sdk_version = "none". In this configuration the java toolchain
# will provide nothing on the bootclasspath, not even the standard java.* libraries.
# The android toolchain is undefined in this configuration.
config_setting(
    name = config_setting_names.SDK_NONE,
    flag_values = {
        "//build/bazel/rules/java/sdk:kind": sdk_version.KIND_NONE,
    },
)

# Pre and Post Java 9 configs differ in how the bootclasspath is constructed and what arguments must
# be passed to javac. Pre Java 9, the SDK is passed as a whole to the --bootclasspath argument of
# javac. Post Java 9, the SDK is split between core libraries, passed using system modules and the
# --system javac argument, and the rest, added at the beginning of the classpath.
selects.config_setting_group(
    name = config_setting_names.PRE_JAVA_9,
    match_any = [
        "//build/bazel/rules/java:" + java_versions.VERSION_TO_CONFIG_SETTING[version]
        for version in java_versions.VERSION_TO_CONFIG_SETTING.keys()
        if version < 9
    ],
)

selects.config_setting_group(
    name = config_setting_names.POST_JAVA_9,
    match_any = [
        "//build/bazel/rules/java:" + java_versions.VERSION_TO_CONFIG_SETTING[version]
        for version in java_versions.VERSION_TO_CONFIG_SETTING.keys()
        if version >= 9
    ],
)

# Specific configuration at a given kind and api level will have the java and android toolchains
# pointed to the proper android.jar and framework.aidl files.
[
    config_setting(
        name = config_setting_names.kind_api(kind, api_level),
        flag_values = {
            "//build/bazel/rules/java/sdk:kind": kind,
            "//build/bazel/rules/java/sdk:api_level": str(api_level),
        },
    )
    for api_level in prebuilt_sdk_utils.API_LEVELS
    for kind in prebuilt_sdk_utils.available_kinds_for_api_level(api_level)
]

# The bootclasspath is a function of sdk kind, api level, and whether building for pre or post java
# 9 sources.
[
    selects.config_setting_group(
        name = config_setting_names.kind_api_pre_java_9(kind, api_level),
        match_all = [
            config_setting_names.kind_api(kind, api_level),
            config_setting_names.PRE_JAVA_9,
        ],
    )
    for api_level in prebuilt_sdk_utils.API_LEVELS
    for kind in prebuilt_sdk_utils.available_kinds_for_api_level(api_level)
    if java_versions.supports_pre_java_9(api_level)
]

[
    selects.config_setting_group(
        name = config_setting_names.kind_api_post_java_9(kind, api_level),
        match_all = [
            config_setting_names.kind_api(kind, api_level),
            config_setting_names.POST_JAVA_9,
        ],
    )
    for api_level in prebuilt_sdk_utils.API_LEVELS
    for kind in prebuilt_sdk_utils.available_kinds_for_api_level(api_level)
    if java_versions.supports_post_java_9(api_level)
]