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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using System;
using System.Collections.Generic;
using System.IO;
#nullable disable
namespace Microsoft.Build.Shared.FileSystem
{
/// <summary>
/// Implementation of file system operations directly over the dot net managed layer
/// </summary>
internal class ManagedFileSystem : IFileSystem
{
private static readonly ManagedFileSystem Instance = new ManagedFileSystem();
public static ManagedFileSystem Singleton() => ManagedFileSystem.Instance;
private static bool ShouldUseMicrosoftIO
{
get
{
#if !MICROSOFT_BUILD_ENGINE_OM_UNITTESTS
return NativeMethodsShared.IsWindows;
#else
// We need to mock usage of ChangeWaves class,
// because Microsoft.Build.Engine.OM.UnitTests should not have access to internals of Microsoft.Build.Framework.
return true;
#endif
}
}
protected ManagedFileSystem() { }
public TextReader ReadFile(string path)
{
return new StreamReader(path);
}
public Stream GetFileStream(string path, FileMode mode, FileAccess access, FileShare share)
{
return new FileStream(path, mode, access, share);
}
public string ReadFileAllText(string path)
{
return File.ReadAllText(path);
}
public byte[] ReadFileAllBytes(string path)
{
return File.ReadAllBytes(path);
}
#if FEATURE_MSIOREDIST
private static IEnumerable<string> HandleFileLoadException(
Func<string, string, Microsoft.IO.SearchOption, IEnumerable<string>> enumerateFunctionDelegate,
string path,
string searchPattern,
Microsoft.IO.SearchOption searchOption)
{
try
{
return enumerateFunctionDelegate(path, searchPattern, searchOption);
}
// Microsoft.IO.Redist has a dependency on System.Buffers and if System.Buffers assembly is not found the line above throws an exception.
// However, FileMatcher class (that in most cases calls the enumeration) does not allow to fail on a IO-related exception. Such behavior hides the actual exception and makes it obscure.
// We rethrow it to make it fail with a proper error message and call stack.
catch (FileLoadException ex)
{
throw new InvalidOperationException(ex.Message, ex);
}
// Sometimes FileNotFoundException is thrown when there is an assembly load failure. In this case it should have FusionLog.
catch (FileNotFoundException ex) when (ex.FusionLog != null)
{
throw new InvalidOperationException(ex.Message, ex);
}
}
#endif
public virtual IEnumerable<string> EnumerateFiles(string path, string searchPattern, SearchOption searchOption)
{
#if FEATURE_MSIOREDIST
return ShouldUseMicrosoftIO
? HandleFileLoadException(
(path, searchPattern, searchOption) => Microsoft.IO.Directory.EnumerateFiles(path, searchPattern, searchOption),
path,
searchPattern,
(Microsoft.IO.SearchOption)searchOption)
: Directory.EnumerateFiles(path, searchPattern, searchOption);
#else
return Directory.EnumerateFiles(path, searchPattern, searchOption);
#endif
}
public virtual IEnumerable<string> EnumerateDirectories(string path, string searchPattern, SearchOption searchOption)
{
#if FEATURE_MSIOREDIST
return ShouldUseMicrosoftIO
? HandleFileLoadException(
(path, searchPattern, searchOption) => Microsoft.IO.Directory.EnumerateDirectories(path, searchPattern, searchOption),
path,
searchPattern,
(Microsoft.IO.SearchOption)searchOption)
: Directory.EnumerateDirectories(path, searchPattern, searchOption);
#else
return Directory.EnumerateDirectories(path, searchPattern, searchOption);
#endif
}
public virtual IEnumerable<string> EnumerateFileSystemEntries(string path, string searchPattern, SearchOption searchOption)
{
#if FEATURE_MSIOREDIST
return ShouldUseMicrosoftIO
? HandleFileLoadException(
(path, searchPattern, searchOption) => Microsoft.IO.Directory.EnumerateFileSystemEntries(path, searchPattern, searchOption),
path,
searchPattern, (Microsoft.IO.SearchOption)searchOption)
: Directory.EnumerateFileSystemEntries(path, searchPattern, searchOption);
#else
return Directory.EnumerateFileSystemEntries(path, searchPattern, searchOption);
#endif
}
public FileAttributes GetAttributes(string path)
{
return File.GetAttributes(path);
}
public virtual DateTime GetLastWriteTimeUtc(string path)
{
return File.GetLastWriteTimeUtc(path);
}
public virtual bool DirectoryExists(string path)
{
return Directory.Exists(path);
}
public virtual bool FileExists(string path)
{
return File.Exists(path);
}
public virtual bool FileOrDirectoryExists(string path)
{
return FileExists(path) || DirectoryExists(path);
}
}
}
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