0c6ff1da4f
Change the signature of the idmap2 commands (Create, Dump, ...) to return Result<Unit> instead of bool. This removes the need to pass in an ostream for error messages: instead, those messages are part of the returned Result. Consolidate error messages: texts in Error objects should not be prefixed with "error:", that is the responsibility of the outer-most caller (i.e. main()). Test: make idmap2_tests Change-Id: I074881b3d1982ea8f4be5752161ac74b14fcba95
75 lines
2.5 KiB
C++
75 lines
2.5 KiB
C++
/*
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* Copyright (C) 2018 The Android Open Source Project
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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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*/
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#ifndef IDMAP2_INCLUDE_IDMAP2_COMMANDLINEOPTIONS_H_
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#define IDMAP2_INCLUDE_IDMAP2_COMMANDLINEOPTIONS_H_
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#include <functional>
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#include <memory>
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#include <ostream>
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#include <string>
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#include <vector>
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#include "idmap2/Result.h"
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namespace android::idmap2 {
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/*
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* Utility class to convert a command line, including options (--path foo.txt),
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* into data structures (options.path = "foo.txt").
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*/
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class CommandLineOptions {
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public:
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static std::unique_ptr<std::vector<std::string>> ConvertArgvToVector(int argc, const char** argv);
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explicit CommandLineOptions(const std::string& name) : name_(name) {
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}
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CommandLineOptions& OptionalFlag(const std::string& name, const std::string& description,
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bool* value);
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CommandLineOptions& MandatoryOption(const std::string& name, const std::string& description,
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std::string* value);
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CommandLineOptions& MandatoryOption(const std::string& name, const std::string& description,
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std::vector<std::string>* value);
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CommandLineOptions& OptionalOption(const std::string& name, const std::string& description,
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std::string* value);
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CommandLineOptions& OptionalOption(const std::string& name, const std::string& description,
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std::vector<std::string>* value);
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Result<Unit> Parse(const std::vector<std::string>& argv) const;
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void Usage(std::ostream& out) const;
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private:
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struct Option {
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std::string name;
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std::string description;
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std::function<void(const std::string& value)> action;
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enum {
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COUNT_OPTIONAL,
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COUNT_EXACTLY_ONCE,
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COUNT_ONCE_OR_MORE,
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COUNT_OPTIONAL_ONCE_OR_MORE,
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} count;
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bool argument;
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};
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mutable std::vector<Option> options_;
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std::string name_;
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};
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} // namespace android::idmap2
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#endif // IDMAP2_INCLUDE_IDMAP2_COMMANDLINEOPTIONS_H_
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