1# Copyright 2020 The Bazel Authors. All rights reserved. 2# 3# Licensed under the Apache License, Version 2.0 (the "License"); 4# you may not use this file except in compliance with the License. 5# You may obtain a copy of the License at 6# 7# http://www.apache.org/licenses/LICENSE-2.0 8# 9# Unless required by applicable law or agreed to in writing, software 10# distributed under the License is distributed on an "AS IS" BASIS, 11# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12# See the License for the specific language governing permissions and 13# limitations under the License. 14 15"""Bazel Desugar Commands.""" 16 17def _desugar( 18 ctx, 19 input, 20 output = None, 21 classpath = None, 22 bootclasspath = [], 23 min_sdk_version = 0, 24 library_desugaring = True, 25 desugar_exec = None, 26 toolchain_type = None): 27 """Desugars a JAR. 28 29 Args: 30 ctx: The context. 31 input: File. The jar to be desugared. 32 output: File. The desugared jar. 33 classpath: Depset of Files. The transitive classpath needed to resolve symbols in the input jar. 34 bootclasspath: List of Files. Bootclasspaths that was used to compile the input jar with. 35 min_sdk_version: Integer. The minimum targeted sdk version. 36 library_desugaring: Boolean. Whether to enable core library desugaring. 37 desugar_exec: File. The executable desugar file. 38 """ 39 40 args = ctx.actions.args() 41 args.use_param_file("@%s", use_always = True) # Required for workers. 42 args.set_param_file_format("multiline") 43 args.add("--input", input) 44 args.add("--output", output) 45 args.add_all(classpath, before_each = "--classpath_entry") 46 args.add_all(bootclasspath, before_each = "--bootclasspath_entry") 47 48 if library_desugaring: 49 if ctx.fragments.android.check_desugar_deps: 50 args.add("--emit_dependency_metadata_as_needed") 51 52 if ctx.fragments.android.desugar_java8_libs and library_desugaring: 53 args.add("--desugar_supported_core_libs") 54 55 if min_sdk_version > 0: 56 args.add("--min_sdk_version", str(min_sdk_version)) 57 58 ctx.actions.run( 59 inputs = depset([input] + bootclasspath, transitive = [classpath]), 60 outputs = [output], 61 executable = desugar_exec, 62 arguments = [args], 63 mnemonic = "Desugar", 64 progress_message = "Desugaring " + input.short_path + " for Android", 65 execution_requirements = {"supports-workers": "1"}, 66 toolchain = toolchain_type, 67 ) 68 69desugar = struct( 70 desugar = _desugar, 71) 72