static void Main(string[] args)
{
string pathA = @"W:\OneDrive\music";
string pathB = @"G:\music";
var start = DateTime.Now;
var dirA = new Dir(new System.IO.DirectoryInfo(pathA));
var time = (DateTime.Now - start).TotalMilliseconds;
Console.WriteLine("mainlisting: " + time + "ms");
start = DateTime.Now;
var dirB = new Dir(new System.IO.DirectoryInfo(pathB));
time = (DateTime.Now - start).TotalMilliseconds;
Console.WriteLine("backlisting: " + time + "ms");
start = DateTime.Now;
var diff = dirA.Missing(dirB);
time = (DateTime.Now - start).TotalMilliseconds;
Console.WriteLine("diff calc : " + time + "ms");
File.WriteAllLines("diff.txt", diff);
}
/// <summary>
/// Looks for dirs and files that exist in the other directory but not in this. Files inside missing dirs are not listed.
/// </summary>
/// <param name="other"></param>
/// <returns></returns>
public IEnumerable<string> Missing(Dir other)
{
// Iterate the other collection to find items unique to it.
var missingFiles = other.Files.Where(a => !Files.Any(b => a.Name == b.Name));
var missingDirs = other.SubDirs.Where(a => !SubDirs.Any(b => a.Name == b.Name));
var output = missingFiles.Select(a => a.Path);
output = output.Concat(missingDirs.Select(a => a.Path));
// Iterate through this collection so the we can look for matches.
foreach (Dir dir in SubDirs)
{
var match = other.SubDirs.FirstOrDefault(a => a.Name == dir.Name);
if (null != match)
{
// If the dir exists, look for missing subdirs recursively.
output = output.Concat(dir.Missing(match));
}
}
return output;
}