/****************************************************************************
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**
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** Copyright (C) 2017 The Qt Company Ltd.
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** Contact: https://www.qt.io/licensing/
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**
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** This file is part of the Qt VS Tools.
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**
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** $QT_BEGIN_LICENSE:GPL-EXCEPT$
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and The Qt Company. For licensing terms
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** and conditions see https://www.qt.io/terms-conditions. For further
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** information use the contact form at https://www.qt.io/contact-us.
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**
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU
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** General Public License version 3 as published by the Free Software
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** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
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** included in the packaging of this file. Please review the following
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** information to ensure the GNU General Public License requirements will
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** be met: https://www.gnu.org/licenses/gpl-3.0.html.
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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using System;
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using System.Collections.Generic;
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using System.Diagnostics;
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using System.Linq;
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using System.Text;
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using System.Text.RegularExpressions;
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using System.IO;
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namespace QtVsTools.Core.CommandLine
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{
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using IVSMacroExpander = QtMsBuild.IVSMacroExpander;
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public class Parser
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{
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List<Option> commandLineOptionList = new List<Option>();
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Dictionary<string, int> nameHash = new Dictionary<string, int>();
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Dictionary<int, List<string>> optionValuesHash = new Dictionary<int, List<string>>();
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List<string> optionNames = new List<string>();
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List<string> positionalArgumentList = new List<string>();
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List<string> unknownOptionNames = new List<string>();
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bool needsParsing = true;
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public enum SingleDashWordOptionMode
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{
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ParseAsCompactedShortOptions = 0,
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ParseAsLongOptions = 1
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}
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SingleDashWordOptionMode singleDashWordOptionMode = 0;
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public enum OptionsAfterPositionalArgumentsMode
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{
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ParseAsOptions = 0,
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ParseAsPositionalArguments = 1
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}
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OptionsAfterPositionalArgumentsMode optionsAfterPositionalArgumentsMode = 0;
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public Parser()
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{
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}
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public string ApplicationDescription
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{
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get;
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set;
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}
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public string ErrorText
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{
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get
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{
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throw new NotImplementedException();
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}
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}
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public string HelpText
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{
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get
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{
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throw new NotImplementedException();
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}
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}
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public IEnumerable<string> PositionalArguments
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{
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get
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{
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CheckParsed("PositionalArguments");
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return positionalArgumentList;
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}
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}
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public IEnumerable<string> OptionNames
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{
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get
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{
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CheckParsed("OptionNames");
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return optionNames;
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}
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}
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public IEnumerable<string> UnknownOptionNames
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{
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get
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{
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CheckParsed("UnknownOptionNames");
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return unknownOptionNames;
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}
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}
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IEnumerable<string> Aliases(string optionName)
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{
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int optionIndex;
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if (!nameHash.TryGetValue(optionName, out optionIndex)) {
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return new List<string>();
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}
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return commandLineOptionList[optionIndex].Names;
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}
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public void SetSingleDashWordOptionMode(SingleDashWordOptionMode singleDashWordOptionMode)
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{
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this.singleDashWordOptionMode = singleDashWordOptionMode;
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}
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public void SetOptionsAfterPositionalArgumentsMode(
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OptionsAfterPositionalArgumentsMode parsingMode)
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{
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this.optionsAfterPositionalArgumentsMode = parsingMode;
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}
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public bool AddOption(Option option)
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{
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if (option.Names.Any()) {
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foreach (var name in option.Names) {
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if (nameHash.ContainsKey(name))
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return false;
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}
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commandLineOptionList.Add(option);
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int offset = commandLineOptionList.Count() - 1;
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foreach (var name in option.Names)
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nameHash.Add(name, offset);
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return true;
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}
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return false;
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}
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public bool AddOptions(IEnumerable<Option> options)
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{
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bool result = true;
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foreach (var option in options)
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result &= AddOption(option);
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return result;
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}
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public Option AddVersionOption()
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{
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Option opt = new Option(new[] { "v", "version" });
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AddOption(opt);
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return opt;
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}
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public Option AddHelpOption()
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{
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Option opt = new Option(new[] { "?", "h", "help" });
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AddOption(opt);
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return opt;
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}
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public void AddPositionalArgument(string name, string description, string syntax)
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{
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throw new NotImplementedException();
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}
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public void ClearPositionalArguments()
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{
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throw new NotImplementedException();
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}
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bool RegisterFoundOption(string optionName)
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{
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if (nameHash.ContainsKey(optionName)) {
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optionNames.Add(optionName);
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return true;
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} else {
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unknownOptionNames.Add(optionName);
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return false;
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}
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}
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bool ParseOptionValue(string optionName, string argument,
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IEnumerator<string> argumentEnumerator, ref bool atEnd)
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{
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const char assignChar = '=';
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int optionOffset;
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if (nameHash.TryGetValue(optionName, out optionOffset)) {
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int assignPos = argument.IndexOf(assignChar);
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bool withValue = !string.IsNullOrEmpty(
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commandLineOptionList[optionOffset].ValueName);
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if (withValue) {
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if (assignPos == -1) {
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if (atEnd = (!argumentEnumerator.MoveNext())) {
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return false;
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}
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if (!optionValuesHash.ContainsKey(optionOffset))
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optionValuesHash.Add(optionOffset, new List<string>());
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optionValuesHash[optionOffset].Add(argumentEnumerator.Current);
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} else {
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if (!optionValuesHash.ContainsKey(optionOffset))
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optionValuesHash.Add(optionOffset, new List<string>());
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optionValuesHash[optionOffset].Add(argument.Substring(assignPos + 1));
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}
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} else {
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if (assignPos != -1) {
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return false;
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}
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}
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}
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return true;
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}
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void CheckParsed(string method)
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{
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if (needsParsing)
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Trace.TraceWarning("CommandLineParser: Parse() before {0}", method);
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}
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List<string> TokenizeArgs(string commandLine, IVSMacroExpander macros, string execName = "")
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{
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List<string> arguments = new List<string>();
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StringBuilder arg = new StringBuilder();
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bool foundExec = string.IsNullOrEmpty(execName);
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foreach (Match token in Lexer.Tokenize(commandLine + " ")) {
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// Additional " " ensures loop will always end with whitespace processing
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if (!foundExec) {
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if (!token.TokenText()
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.EndsWith(execName,
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StringComparison.InvariantCultureIgnoreCase)) {
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continue;
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}
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foundExec = true;
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}
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var tokenType = token.TokenType();
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if (tokenType == Token.Whitespace || tokenType == Token.Newline) {
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// This will always run at the end of the loop
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if (arg.Length > 0) {
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var argData = arg.ToString();
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arg.Clear();
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if (argData.StartsWith("@")) {
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var workingDir = macros.ExpandString("$(MSBuildProjectDirectory)");
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var optFilePath = macros.ExpandString(argData.Substring(1));
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string[] additionalArgs = File.ReadAllLines(
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Path.Combine(workingDir, optFilePath));
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if (additionalArgs != null) {
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var additionalArgsString = string.Join(" ", additionalArgs
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.Select(x => "\"" + x.Replace("\"", "\\\"") + "\""));
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arguments.AddRange(TokenizeArgs(additionalArgsString, macros));
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}
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} else {
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arguments.Add(argData);
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}
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}
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if (tokenType == Token.Newline)
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break;
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} else {
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arg.Append(token.TokenText());
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}
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}
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return arguments;
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}
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public bool Parse(string commandLine, IVSMacroExpander macros, string execName)
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{
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List<string> args = null;
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try {
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args = TokenizeArgs(commandLine, macros, execName);
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} catch {
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return false;
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}
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return Parse(args);
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}
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public bool Parse(IEnumerable<string> args)
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{
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needsParsing = false;
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bool error = false;
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const string doubleDashString = "--";
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const char dashChar = '-';
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const char assignChar = '=';
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bool forcePositional = false;
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positionalArgumentList.Clear();
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optionNames.Clear();
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unknownOptionNames.Clear();
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optionValuesHash.Clear();
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if (args == null || !args.Any()) {
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return false;
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}
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var argumentIterator = args.GetEnumerator();
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bool atEnd = false;
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while (!atEnd && argumentIterator.MoveNext()) {
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var argument = argumentIterator.Current;
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if (forcePositional) {
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positionalArgumentList.Add(argument);
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} else if (argument.StartsWith(doubleDashString)) {
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if (argument.Length > 2) {
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var optionName = argument.Substring(2).Split(new char[] { assignChar })[0];
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if (RegisterFoundOption(optionName)) {
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if (!ParseOptionValue(
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optionName,
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argument,
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argumentIterator,
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ref atEnd)) {
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error = true;
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}
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} else {
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error = true;
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}
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} else {
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forcePositional = true;
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}
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} else if (argument.StartsWith(dashChar.ToString())) {
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if (argument.Length == 1) { // single dash ("stdin")
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positionalArgumentList.Add(argument);
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continue;
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}
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string optionName = "";
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switch (singleDashWordOptionMode) {
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case SingleDashWordOptionMode.ParseAsCompactedShortOptions:
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bool valueFound = false;
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for (int pos = 1; pos < argument.Length; ++pos) {
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optionName = argument.Substring(pos, 1);
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if (!RegisterFoundOption(optionName)) {
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error = true;
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} else {
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int optionOffset;
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Trace.Assert(nameHash.TryGetValue(
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optionName,
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out optionOffset));
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bool withValue = !string.IsNullOrEmpty(
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commandLineOptionList[optionOffset].ValueName);
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if (withValue) {
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if (pos + 1 < argument.Length) {
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if (argument[pos + 1] == assignChar)
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++pos;
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if (!optionValuesHash.ContainsKey(optionOffset)) {
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optionValuesHash.Add(
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optionOffset,
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new List<string>());
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}
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optionValuesHash[optionOffset].Add(
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argument.Substring(pos + 1));
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valueFound = true;
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}
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break;
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}
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if (pos + 1 < argument.Length
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&& argument[pos + 1] == assignChar) {
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break;
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}
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}
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}
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if (!valueFound
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&& !ParseOptionValue(
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optionName,
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argument,
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argumentIterator,
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ref atEnd)) {
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error = true;
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}
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break;
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case SingleDashWordOptionMode.ParseAsLongOptions:
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if (argument.Length > 2) {
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string possibleShortOptionStyleName = argument.Substring(1, 1);
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int shortOptionIdx;
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if (nameHash.TryGetValue(
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possibleShortOptionStyleName,
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out shortOptionIdx)) {
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var arg = commandLineOptionList[shortOptionIdx];
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if ((arg.Flags & Option.Flag.ShortOptionStyle) != 0) {
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RegisterFoundOption(possibleShortOptionStyleName);
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if (!optionValuesHash.ContainsKey(shortOptionIdx)) {
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optionValuesHash.Add(
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shortOptionIdx,
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new List<string>());
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}
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optionValuesHash[shortOptionIdx].Add(
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argument.Substring(2));
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break;
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}
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}
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}
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optionName = argument.Substring(1).Split(new char[] { assignChar })[0];
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if (RegisterFoundOption(optionName)) {
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if (!ParseOptionValue(
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optionName,
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argument,
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argumentIterator,
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ref atEnd)) {
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error = true;
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}
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} else {
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error = true;
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}
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break;
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}
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} else {
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positionalArgumentList.Add(argument);
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if (optionsAfterPositionalArgumentsMode
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== OptionsAfterPositionalArgumentsMode.ParseAsPositionalArguments) {
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forcePositional = true;
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}
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}
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}
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return !error;
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}
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public bool IsSet(string name)
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{
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CheckParsed("IsSet");
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if (optionNames.Contains(name))
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return true;
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var aliases = Aliases(name);
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foreach (var optionName in optionNames) {
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if (aliases.Contains(optionName))
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return true;
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}
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return false;
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}
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public string Value(string optionName)
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{
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CheckParsed("Value");
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var valueList = Values(optionName);
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if (valueList.Any())
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return valueList.Last();
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return "";
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}
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public IEnumerable<string> Values(string optionName)
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{
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CheckParsed("Values");
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int optionOffset;
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if (nameHash.TryGetValue(optionName, out optionOffset)) {
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var values = optionValuesHash[optionOffset];
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return values;
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}
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Trace.TraceWarning("QCommandLineParser: option not defined: \"{0}\"", optionName);
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return new List<string>();
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}
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public bool IsSet(Option option)
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{
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return option.Names.Any() && IsSet(option.Names.First());
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}
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public string Value(Option option)
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{
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return Value(option.Names.FirstOrDefault());
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}
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public IEnumerable<string> Values(Option option)
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{
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return Values(option.Names.FirstOrDefault());
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}
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}
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public class Option
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{
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[Flags]
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public enum Flag
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{
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HiddenFromHelp = 0x1,
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ShortOptionStyle = 0x2
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}
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public Option(string name, string valueName = "")
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{
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Names = new[] { name };
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ValueName = valueName;
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Flags = 0;
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}
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public Option(IEnumerable<string> names, string valueName = "")
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{
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Names = names;
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ValueName = valueName;
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Flags = 0;
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}
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public Option(Option other)
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{
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Names = other.Names;
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ValueName = other.ValueName;
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Flags = other.Flags;
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}
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public IEnumerable<string> Names
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{
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get;
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private set;
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}
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public string ValueName
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{
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get;
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set;
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}
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public Flag Flags
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{
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get;
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set;
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}
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public override string ToString()
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{
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return Names.Last();
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}
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}
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enum Token
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{
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Unknown = 0,
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Newline = 1,
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Unquoted = 2,
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Quoted = 3,
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Whitespace = 4
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};
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static class Lexer
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{
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static Regex lexer = new Regex(
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/* Newline */ @"(\n)" +
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/* Unquoted */ @"|((?:(?:[^\s\""])|(?:(?<=\\)\""))+)" +
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/* Quoted */ @"|(?:\""((?:(?:[^\""])|(?:(?<=\\)\""))+)\"")" +
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/* Whitespace */ @"|(\s+)");
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public static Token TokenType(this Match token)
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{
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for (int i = 1; i < token.Groups.Count; i++) {
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if (!string.IsNullOrEmpty(token.Groups[i].Value))
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return (Token)i;
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}
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return Token.Unknown;
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}
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public static string TokenText(this Match token)
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{
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Token t = TokenType(token);
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if (t != Token.Unknown)
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return token.Groups[(int)t].Value.Replace("\\\"", "\"");
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return "";
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}
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public static MatchCollection Tokenize(string commandLine)
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{
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return lexer.Matches(commandLine);
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}
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}
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}
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