/// <summary>
/// Computes an MD5 hash of the contents of a given directory by hashing the union of relative file paths and associated file sizes.
/// </summary>
public static string ComputeDirectoryHash(string targetPath)
{
if (!Directory.Exists(targetPath))
{
throw new ArgumentException(String.Format("Target directory '{0}' does not exist!", targetPath), "targetPath");
}
// Trim all occurrences of standard & alternate directory separator chars and then append a single standard separator to stay consistent.
targetPath = targetPath.TrimEnd(Path.DirectorySeparatorChar, Path.AltDirectorySeparatorChar) + Path.DirectorySeparatorChar;
// Build a dictionary mapping relative file path to file size.
var fileSizeMap = new SortedDictionary <string, long>();
foreach (FileInfo file in DirectoryHelper.GetAllFiles(targetPath))
{
string relativePath = file.FullName.Substring(targetPath.Length);
fileSizeMap[relativePath] = file.Length;
}
return(GenerateMD5Hash(fileSizeMap));
}
private static string ComputeDirectoryHash(string targetPath)
{
// Trim all occurrences of standard & alternate directory separator chars and then append a single standard separator to stay consistent.
targetPath = targetPath.TrimEnd(Path.DirectorySeparatorChar, Path.AltDirectorySeparatorChar) + Path.DirectorySeparatorChar;
IEnumerable <FileInfo> allFiles = DirectoryHelper.GetAllFiles(targetPath);
SortedDictionary <string, long> fileSet = new SortedDictionary <string, long>();
foreach (var file in allFiles)
{
string relativePath = file.FullName.Substring(targetPath.Length);
// Filter out all worker zips and directories, we calculate the logset fingerprint based on contents of the primary only.
if (!relativePath.Contains(Path.DirectorySeparatorChar + "worker") || RootIsWorker(relativePath))
{
fileSet[relativePath] = file.Length;
}
}
return(GenerateMD5Hash(fileSet));
}