public static void SafeCreateFile(FsPath filename, Action <FsPath> createFile)
{
if (!filename.IsFile())
{
createFile(filename);
return;
}
FsPath backupName = filename.Concat(".bak");
if (backupName.IsFile())
{
backupName.DeleteFile();
}
filename.MoveFileTo(backupName);
try
{
createFile(filename);
}
catch (Exception)
{
backupName.MoveFileTo(filename);
throw;
}
backupName.DeleteFile();
}
public static FileSignature[] ReadFromFile(FsPath targetFile, bool internPath)
{
if (!targetFile.IsFile())
{
return(null);
}
var lines = targetFile.ReadAllLines()
.Where(_ => !string.IsNullOrEmpty(_));
var result = lines
.Select(_ => new FileSignature
{
Md5Hash = _.Substring(0, 32),
Path = FsPathPersistence.Deserialize(_.Substring(33)).Intern(internPath)
}).ToArray();
return(result);
}