public Results.ReconcileResult Reconcile(Results.ScanResult a, Results.ScanResult b)
{
var pathsA = new HashSet <string>(a.Keys);
var pathsB = new HashSet <string>(b.Keys);
var suspectedConflicts = new HashSet <string>(pathsA);
suspectedConflicts.IntersectWith(pathsB);
var unchangedFiles = new HashSet <string>();
foreach (var entry in suspectedConflicts)
{
if (a[entry].Equals(b[entry]))
{
unchangedFiles.Add(entry);
}
}
var conflicts = new HashSet <string>(suspectedConflicts);
conflicts.RemoveWhere(entry => unchangedFiles.Contains(entry));
return(new Results.ReconcileResult(
this.GeneratePatch(b, a, pathsB, pathsA, unchangedFiles, conflicts),
this.GeneratePatch(a, b, pathsA, pathsB, unchangedFiles, conflicts)
));
}
private Results.PatchResult GeneratePatch(
Results.ScanResult src, Results.ScanResult target,
HashSet <string> srcPaths, HashSet <string> targetPaths,
HashSet <string> unchanged, HashSet <string> conflicts)
{
var retVal = new Results.PatchResult();
var additions = new HashSet <string>(srcPaths);
int addCount = additions.RemoveWhere(entry => targetPaths.Contains(entry));
retVal[Results.ReconcileOperation.ADD] = new List <FileResult>(addCount);
foreach (var entry in additions)
{
retVal[Results.ReconcileOperation.ADD].Add(src[entry]);
}
retVal[Results.ReconcileOperation.UNCHANGED] = new List <FileResult>(unchanged.Count);
foreach (var entry in unchanged)
{
retVal[Results.ReconcileOperation.UNCHANGED].Add(src[entry]);
}
retVal[Results.ReconcileOperation.CONFLICT] = new List <FileResult>(conflicts.Count);
foreach (var entry in conflicts)
{
retVal[Results.ReconcileOperation.CONFLICT].Add(target[entry]);
}
return(retVal);
}
public Task <Results.ScanResult> ScanDirectory(string root)
{
var cutIndex = root.Length + 1;
var files = Directory.EnumerateFiles(root, "*", SearchOption.AllDirectories);
// Return a task that runs this in a parallel foreach
// Because Parallel.ForEach doesn't return a task and is not awaitable,
// then we have to wrap it in this way.
// The resulting code is faster than having a List<Task> that is then sent to Task.WaitAll
// since Parallel.ForEach scales better.
return(Task.Run(
() =>
{
var scanResult = new Results.ScanResult();
Parallel.ForEach(files,
(filepath) => {
var canonicalPath = filepath.Substring(cutIndex);
scanResult[canonicalPath] = this.HashFile(filepath, canonicalPath);
});
return scanResult;
}
));
}