private async Task TransferFileAsync(IFileOperationsExecuter sourceFileOps, SlimFileInfo sourceFile, IFileOperationsExecuter targetFileOps, SlimFileSystemInfo target, string targetDirectory)
{
if (target == null)
{
if (this.VerboseLogging)
{
this.LogDebug($"{sourceFile.Name} does not exist in {targetDirectory}.");
}
}
var targetFile = target as SlimFileInfo;
if (targetFile != null)
{
this.LogDebug($"{sourceFile.Name} already exists in {targetDirectory}.");
this.LogDebug($"Source timestamp: {sourceFile.LastWriteTimeUtc}, Target timestamp: {targetFile.LastWriteTimeUtc}");
this.LogDebug($"Source size: {sourceFile.Size}, Target size: {targetFile.Size}");
if (sourceFile.LastWriteTimeUtc == targetFile.LastWriteTimeUtc && sourceFile.Size == targetFile.Size)
{
this.LogDebug($"Size and timestamp are the same; skipping {sourceFile.Name}...");
return;
}
}
else if (target != null)
{
this.LogDebug($"{sourceFile.Name} is a file in {sourceFile.DirectoryName}, but a directory in {targetDirectory}.");
this.LogDebug($"Deleting directory {target.FullName}...");
await targetFileOps.DeleteDirectoriesAsync(new[] { target.FullName }).ConfigureAwait(false);
}
else
{
if (!string.IsNullOrEmpty(targetDirectory))
{
await targetFileOps.CreateDirectoryAsync(targetDirectory).ConfigureAwait(false);
}
}
var targetFileName = PathEx.Combine(targetDirectory, sourceFile.Name).Replace(sourceFileOps.DirectorySeparator, targetFileOps.DirectorySeparator);
this.LogDebug($"Transferring {sourceFile.Name} to {targetDirectory}...");
using (var sourceStream = await sourceFileOps.OpenFileAsync(sourceFile.FullName, FileMode.Open, FileAccess.Read).ConfigureAwait(false))
using (var targetStream = await targetFileOps.OpenFileAsync(targetFileName, FileMode.Create, FileAccess.Write).ConfigureAwait(false))
{
await sourceStream.CopyToAsync(targetStream).ConfigureAwait(false);
}
}
private static bool IsFileContentsUpToDate(FileData oldFileData)
{
// TODO(rpaquay): The following File.Exists and File.GetLastWriteTimUtc are expensive operations.
// Given we have FileSystemChanged events when files change on disk, we could be smarter here
// and avoid 99% of these checks in common cases.
var fi = new SlimFileInfo(oldFileData.FileName.FullPathName);
if (fi.Exists)
{
var contents = oldFileData.Contents;
if (contents != null)
{
if (fi.LastWriteTimeUtc == contents.UtcLastModified)
{
return(true);
}
}
}
return(false);
}
private FileContents ReadFile(FullPathName fullName)
{
try {
var fileInfo = new SlimFileInfo(fullName);
const int trailingByteCount = 2;
var block = NativeFile.ReadFileNulTerminated(fileInfo, trailingByteCount);
var contentsByteCount = (int)block.ByteLength - trailingByteCount; // Padding added by ReadFileNulTerminated
var kind = NativeMethods.Text_GetKind(block.Pointer, contentsByteCount);
switch (kind)
{
case NativeMethods.TextKind.Ascii:
return(new AsciiFileContents(new FileContentsMemory(block, 0, contentsByteCount), fileInfo.LastWriteTimeUtc));
case NativeMethods.TextKind.AsciiWithUtf8Bom:
const int utf8BomSize = 3;
return(new AsciiFileContents(new FileContentsMemory(block, utf8BomSize, contentsByteCount - utf8BomSize), fileInfo.LastWriteTimeUtc));
case NativeMethods.TextKind.Utf8WithBom:
var utf16Block = Conversion.UTF8ToUnicode(block);
block.Dispose();
return(new UTF16FileContents(new FileContentsMemory(utf16Block, 0, utf16Block.ByteLength), fileInfo.LastWriteTimeUtc));
case NativeMethods.TextKind.Unknown:
default:
// TODO(rpaquay): Figure out a better way to detect encoding.
//Logger.Log("Text Encoding of file \"{0}\" is not recognized.", fullName);
return(new AsciiFileContents(new FileContentsMemory(block, 0, contentsByteCount), fileInfo.LastWriteTimeUtc));
//throw new NotImplementedException(string.Format("Text Encoding of file \"{0}\" is not recognized.", fullName));
}
}
catch (Exception e) {
Logger.LogException(e, "Error reading content of text file \"{0}\", skipping file.", fullName);
return(StringFileContents.Empty);
}
}
public FileInfoSnapshot(FullPath path)
{
_fileInfo = new SlimFileInfo(path);
}
public FileInfoSnapshot(SlimFileInfo fileInfo)
{
_fileInfo = fileInfo;
}
