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// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
namespace WixToolset.Core.CommandLine
{
using System;
using System.Collections.Generic;
using System.IO;
using WixToolset.Data;
using WixToolset.Extensibility.Services;
internal class ParseCommandLine : IParseCommandLine
{
private const string ExpectedArgument = "expected argument";
public string ErrorArgument { get; set; }
private Queue<string> RemainingArguments { get; }
private IMessaging Messaging { get; }
public ParseCommandLine(IMessaging messaging, string[] arguments, string errorArgument)
{
this.Messaging = messaging;
this.RemainingArguments = new Queue<string>(arguments);
this.ErrorArgument = errorArgument;
}
public bool IsSwitch(string arg) => !String.IsNullOrEmpty(arg) && ('/' == arg[0] || '-' == arg[0]);
public void GetArgumentAsFilePathOrError(string argument, string fileType, IList<string> paths)
{
foreach (var path in GetFiles(argument, fileType))
{
paths.Add(path);
}
}
public string GetNextArgumentOrError(string commandLineSwitch)
{
if (this.TryGetNextNonSwitchArgumentOrError(out var argument))
{
return argument;
}
this.Messaging.Write(ErrorMessages.ExpectedArgument(commandLineSwitch));
return null;
}
public bool GetNextArgumentOrError(string commandLineSwitch, IList<string> args)
{
if (this.TryGetNextNonSwitchArgumentOrError(out var arg))
{
args.Add(arg);
return true;
}
this.Messaging.Write(ErrorMessages.ExpectedArgument(commandLineSwitch));
return false;
}
public string GetNextArgumentAsDirectoryOrError(string commandLineSwitch)
{
if (this.TryGetNextNonSwitchArgumentOrError(out var arg) && TryGetDirectory(commandLineSwitch, this.Messaging, arg, out var directory))
{
return directory;
}
this.Messaging.Write(ErrorMessages.ExpectedArgument(commandLineSwitch));
return null;
}
public bool GetNextArgumentAsDirectoryOrError(string commandLineSwitch, IList<string> directories)
{
if (this.TryGetNextNonSwitchArgumentOrError(out var arg) && TryGetDirectory(commandLineSwitch, this.Messaging, arg, out var directory))
{
directories.Add(directory);
return true;
}
this.Messaging.Write(ErrorMessages.ExpectedArgument(commandLineSwitch));
return false;
}
public string GetNextArgumentAsFilePathOrError(string commandLineSwitch)
{
if (this.TryGetNextNonSwitchArgumentOrError(out var arg) && this.TryGetFile(commandLineSwitch, arg, out var path))
{
return path;
}
this.Messaging.Write(ErrorMessages.ExpectedArgument(commandLineSwitch));
return null;
}
public bool GetNextArgumentAsFilePathOrError(string commandLineSwitch, string fileType, IList<string> paths)
{
if (this.TryGetNextNonSwitchArgumentOrError(out var arg))
{
foreach (var path in GetFiles(arg, fileType))
{
paths.Add(path);
}
return true;
}
this.Messaging.Write(ErrorMessages.ExpectedArgument(commandLineSwitch));
return false;
}
public bool TryGetNextSwitchOrArgument(out string arg)
{
return TryDequeue(this.RemainingArguments, out arg);
}
private bool TryGetNextNonSwitchArgumentOrError(out string arg)
{
var result = this.TryGetNextSwitchOrArgument(out arg);
if (!result && !this.IsSwitch(arg))
{
this.ErrorArgument = arg ?? ParseCommandLine.ExpectedArgument;
}
return result;
}
private static bool IsValidArg(string arg) => !(String.IsNullOrEmpty(arg) || '/' == arg[0] || '-' == arg[0]);
private static bool TryDequeue(Queue<string> q, out string arg)
{
if (q.Count > 0)
{
arg = q.Dequeue();
return true;
}
arg = null;
return false;
}
private bool TryGetDirectory(string commandlineSwitch, IMessaging messageHandler, string arg, out string directory)
{
directory = null;
if (File.Exists(arg))
{
this.Messaging.Write(ErrorMessages.ExpectedDirectoryGotFile(commandlineSwitch, arg));
return false;
}
directory = this.VerifyPath(arg);
return directory != null;
}
private bool TryGetFile(string commandlineSwitch, string arg, out string path)
{
path = null;
if (!IsValidArg(arg))
{
this.Messaging.Write(ErrorMessages.FilePathRequired(commandlineSwitch));
}
else if (Directory.Exists(arg))
{
this.Messaging.Write(ErrorMessages.ExpectedFileGotDirectory(commandlineSwitch, arg));
}
else
{
path = this.VerifyPath(arg);
}
return path != null;
}
/// <summary>
/// Get a set of files that possibly have a search pattern in the path (such as '*').
/// </summary>
/// <param name="searchPath">Search path to find files in.</param>
/// <param name="fileType">Type of file; typically "Source".</param>
/// <returns>An array of files matching the search path.</returns>
/// <remarks>
/// This method is written in this verbose way because it needs to support ".." in the path.
/// It needs the directory path isolated from the file name in order to use Directory.GetFiles
/// or DirectoryInfo.GetFiles. The only way to get this directory path is manually since
/// Path.GetDirectoryName does not support ".." in the path.
/// </remarks>
/// <exception cref="WixFileNotFoundException">Throws WixFileNotFoundException if no file matching the pattern can be found.</exception>
private string[] GetFiles(string searchPath, string fileType)
{
if (null == searchPath)
{
throw new ArgumentNullException(nameof(searchPath));
}
// Convert alternate directory separators to the standard one.
string filePath = searchPath.Replace(Path.AltDirectorySeparatorChar, Path.DirectorySeparatorChar);
int lastSeparator = filePath.LastIndexOf(Path.DirectorySeparatorChar);
var files = new string[0];
try
{
if (0 > lastSeparator)
{
files = Directory.GetFiles(".", filePath);
}
else // found directory separator
{
files = Directory.GetFiles(filePath.Substring(0, lastSeparator + 1), filePath.Substring(lastSeparator + 1));
}
}
catch (DirectoryNotFoundException)
{
// Don't let this function throw the DirectoryNotFoundException. This exception
// occurs for non-existant directories and invalid characters in the searchPattern.
}
catch (ArgumentException)
{
// Don't let this function throw the ArgumentException. This exception
// occurs in certain situations such as when passing a malformed UNC path.
}
catch (IOException)
{
}
if (0 == files.Length)
{
this.Messaging.Write(ErrorMessages.FileNotFound(null, searchPath, fileType));
}
return files;
}
private string VerifyPath(string path)
{
string fullPath;
if (0 <= path.IndexOf('\"'))
{
this.Messaging.Write(ErrorMessages.PathCannotContainQuote(path));
return null;
}
try
{
fullPath = Path.GetFullPath(path);
}
catch (Exception e)
{
this.Messaging.Write(ErrorMessages.InvalidCommandLineFileName(path, e.Message));
return null;
}
return fullPath;
}
}
}
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