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254 lines
8.0 KiB
254 lines
8.0 KiB
/*
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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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#include "Command.h"
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#include <iomanip>
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#include <iostream>
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#include <string>
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#include <vector>
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#include "android-base/stringprintf.h"
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#include "android-base/utf8.h"
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#include "androidfw/StringPiece.h"
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#include "trace/TraceBuffer.h"
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#include "util/Util.h"
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using android::base::StringPrintf;
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using android::StringPiece;
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namespace aapt {
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std::string GetSafePath(const StringPiece& arg) {
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#ifdef _WIN32
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// If the path exceeds the maximum path length for Windows, encode the path using the
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// extended-length prefix
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std::wstring path16;
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CHECK(android::base::UTF8PathToWindowsLongPath(arg.data(), &path16))
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<< "Failed to convert file path to UTF-16: file path " << arg.data();
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std::string path8;
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CHECK(android::base::WideToUTF8(path16, &path8))
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<< "Failed to convert file path back to UTF-8: file path " << arg.data();
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return path8;
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#else
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return arg.to_string();
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#endif
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}
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void Command::AddRequiredFlag(const StringPiece& name, const StringPiece& description,
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std::string* value, uint32_t flags) {
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auto func = [value, flags](const StringPiece& arg) -> bool {
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*value = (flags & Command::kPath) ? GetSafePath(arg) : arg.to_string();
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return true;
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};
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flags_.emplace_back(Flag(name, description, /* required */ true, /* num_args */ 1, func));
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}
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void Command::AddRequiredFlagList(const StringPiece& name, const StringPiece& description,
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std::vector<std::string>* value, uint32_t flags) {
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auto func = [value, flags](const StringPiece& arg) -> bool {
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value->push_back((flags & Command::kPath) ? GetSafePath(arg) : arg.to_string());
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return true;
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};
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flags_.emplace_back(Flag(name, description, /* required */ true, /* num_args */ 1, func));
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}
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void Command::AddOptionalFlag(const StringPiece& name, const StringPiece& description,
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Maybe<std::string>* value, uint32_t flags) {
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auto func = [value, flags](const StringPiece& arg) -> bool {
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*value = (flags & Command::kPath) ? GetSafePath(arg) : arg.to_string();
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return true;
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};
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flags_.emplace_back(Flag(name, description, /* required */ false, /* num_args */ 1, func));
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}
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void Command::AddOptionalFlagList(const StringPiece& name, const StringPiece& description,
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std::vector<std::string>* value, uint32_t flags) {
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auto func = [value, flags](const StringPiece& arg) -> bool {
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value->push_back((flags & Command::kPath) ? GetSafePath(arg) : arg.to_string());
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return true;
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};
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flags_.emplace_back(Flag(name, description, /* required */ false, /* num_args */ 1, func));
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}
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void Command::AddOptionalFlagList(const StringPiece& name, const StringPiece& description,
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std::unordered_set<std::string>* value) {
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auto func = [value](const StringPiece& arg) -> bool {
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value->insert(arg.to_string());
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return true;
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};
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flags_.emplace_back(Flag(name, description, /* required */ false, /* num_args */ 1, func));
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}
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void Command::AddOptionalSwitch(const StringPiece& name, const StringPiece& description,
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bool* value) {
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auto func = [value](const StringPiece& arg) -> bool {
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*value = true;
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return true;
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};
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flags_.emplace_back(Flag(name, description, /* required */ false, /* num_args */ 0, func));
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}
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void Command::AddOptionalSubcommand(std::unique_ptr<Command>&& subcommand, bool experimental) {
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subcommand->full_subcommand_name_ = StringPrintf("%s %s", name_.data(), subcommand->name_.data());
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if (experimental) {
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experimental_subcommands_.push_back(std::move(subcommand));
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} else {
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subcommands_.push_back(std::move(subcommand));
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}
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}
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void Command::SetDescription(const StringPiece& description) {
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description_ = description.to_string();
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}
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void Command::Usage(std::ostream* out) {
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constexpr size_t kWidth = 50;
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*out << full_subcommand_name_;
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if (!subcommands_.empty()) {
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*out << " [subcommand]";
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}
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*out << " [options]";
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for (const Flag& flag : flags_) {
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if (flag.is_required) {
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*out << " " << flag.name << " arg";
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}
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}
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*out << " files...\n";
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if (!subcommands_.empty()) {
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*out << "\nSubcommands:\n";
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for (auto& subcommand : subcommands_) {
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std::string argline = subcommand->name_;
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// Split the description by newlines and write out the argument (which is
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// empty after the first line) followed by the description line. This will make sure
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// that multiline descriptions are still right justified and aligned.
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for (StringPiece line : util::Tokenize(subcommand->description_, '\n')) {
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*out << " " << std::setw(kWidth) << std::left << argline << line << "\n";
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argline = " ";
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}
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}
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}
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*out << "\nOptions:\n";
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for (const Flag& flag : flags_) {
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std::string argline = flag.name;
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if (flag.num_args > 0) {
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argline += " arg";
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}
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// Split the description by newlines and write out the argument (which is
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// empty after the first line) followed by the description line. This will make sure
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// that multiline descriptions are still right justified and aligned.
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for (StringPiece line : util::Tokenize(flag.description, '\n')) {
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*out << " " << std::setw(kWidth) << std::left << argline << line << "\n";
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argline = " ";
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}
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}
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*out << " " << std::setw(kWidth) << std::left << "-h"
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<< "Displays this help menu\n";
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out->flush();
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}
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int Command::Execute(const std::vector<StringPiece>& args, std::ostream* out_error) {
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TRACE_NAME_ARGS("Command::Execute", args);
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std::vector<std::string> file_args;
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for (size_t i = 0; i < args.size(); i++) {
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const StringPiece& arg = args[i];
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if (*(arg.data()) != '-') {
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// Continue parsing as the subcommand if the first argument matches one of the subcommands
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if (i == 0) {
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for (auto& subcommand : subcommands_) {
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if (arg == subcommand->name_ || (!subcommand->short_name_.empty()
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&& arg == subcommand->short_name_)) {
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return subcommand->Execute(
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std::vector<StringPiece>(args.begin() + 1, args.end()), out_error);
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}
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}
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for (auto& subcommand : experimental_subcommands_) {
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if (arg == subcommand->name_ || (!subcommand->short_name_.empty()
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&& arg == subcommand->short_name_)) {
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return subcommand->Execute(
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std::vector<StringPiece>(args.begin() + 1, args.end()), out_error);
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}
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}
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}
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file_args.push_back(GetSafePath(arg));
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continue;
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}
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if (arg == "-h" || arg == "--help") {
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Usage(out_error);
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return 1;
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}
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bool match = false;
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for (Flag& flag : flags_) {
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if (arg == flag.name) {
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if (flag.num_args > 0) {
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i++;
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if (i >= args.size()) {
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*out_error << flag.name << " missing argument.\n\n";
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Usage(out_error);
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return false;
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}
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flag.action(args[i]);
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} else {
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flag.action({});
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}
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flag.found = true;
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match = true;
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break;
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}
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}
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if (!match) {
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*out_error << "unknown option '" << arg << "'.\n\n";
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Usage(out_error);
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return 1;
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}
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}
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for (const Flag& flag : flags_) {
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if (flag.is_required && !flag.found) {
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*out_error << "missing required flag " << flag.name << "\n\n";
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Usage(out_error);
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return 1;
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}
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}
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return Action(file_args);
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}
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} // namespace aapt
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