58 lines
2.4 KiB
Java
58 lines
2.4 KiB
Java
// Copyright 2017 The Bazel Authors. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package com.google.devtools.common.options;
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import com.google.common.base.CharMatcher;
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import com.google.common.base.Strings;
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import com.google.common.io.BaseEncoding;
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import com.google.devtools.build.lib.runtime.proto.InvocationPolicyOuterClass.InvocationPolicy;
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import com.google.protobuf.InvalidProtocolBufferException;
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import com.google.protobuf.TextFormat;
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/**
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* Parses the given InvocationPolicy string, which may be a base64-encoded binary-serialized
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* InvocationPolicy message, or a text formatted InvocationPolicy message. Note that the text
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* format is not backwards compatible as the binary format is.
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*/
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public class InvocationPolicyParser {
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/**
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* Parses InvocationPolicy in either of the accepted formats. Returns an empty policy if no policy
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* is provided.
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*
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* @throws com.google.devtools.common.options.OptionsParsingException if the value of
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* --invocation_policy is invalid.
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*/
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public static InvocationPolicy parsePolicy(String policy) throws OptionsParsingException {
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if (Strings.isNullOrEmpty(policy)) {
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return InvocationPolicy.getDefaultInstance();
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}
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try {
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try {
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// First try decoding the policy as a base64 encoded binary proto.
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return InvocationPolicy.parseFrom(
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BaseEncoding.base64().decode(CharMatcher.whitespace().removeFrom(policy)));
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} catch (IllegalArgumentException e) {
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// If the flag value can't be decoded from base64, try decoding the policy as a text
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// formatted proto.
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InvocationPolicy.Builder builder = InvocationPolicy.newBuilder();
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TextFormat.merge(policy, builder);
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return builder.build();
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}
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} catch (InvalidProtocolBufferException | TextFormat.ParseException e) {
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throw new OptionsParsingException("Malformed value of --invocation_policy: " + policy, e);
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}
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}
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}
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