private static ConcurrentStack <Commit> ReadCommitsFromRefs(string vcsPath)
{
var refs = Refs.ReadAll(vcsPath);
var addedCommits = new ConcurrentDictionary <ObjectHash, bool>();
var result = new ConcurrentStack <Commit>();
Parallel.ForEach(refs, new ParallelOptions {
MaxDegreeOfParallelism = Environment.ProcessorCount
}, @ref =>
{
var gitObject = @ref is TagRef tag
? GitObjectFactory.ReadGitObject(vcsPath, new ObjectHash(tag.CommitHash))
: GitObjectFactory.ReadGitObject(vcsPath, new ObjectHash(@ref.Hash));
while (gitObject is Tag tagObject)
{
gitObject = GitObjectFactory.ReadGitObject(vcsPath, new ObjectHash(tagObject.Object));
}
// Tags pointing to trees are ignored
if (gitObject.Type == GitObjectType.Commit && addedCommits.TryAdd(gitObject.Hash, true))
{
result.Push((Commit)gitObject);
}
});
return(result);
}
private static ObjectHash RewriteRef(string vcsPath, string hash, string refName, Dictionary <ObjectHash, ObjectHash> rewrittenCommits)
{
var gitObject = GitObjectFactory.ReadGitObject(vcsPath, new ObjectHash(hash));
if (gitObject.Type == GitObjectType.Commit)
{
var path = Path.Combine(vcsPath, refName);
var correctedHash = GetRewrittenCommitHash(new ObjectHash(hash), rewrittenCommits);
Directory.CreateDirectory(Path.GetDirectoryName(path));
File.WriteAllText(path, correctedHash.ToString());
return(correctedHash);
}
if (gitObject.Type == GitObjectType.Tag)
{
var tag = (Tag)gitObject;
if (tag.PointsToTree)
{
// Do not touch tags pointing to trees right now as this is not properly implemented yet
return(tag.Hash);
}
var rewrittenObjectHash = tag.PointsToTag
? RewriteRef(vcsPath, tag.Object, "", rewrittenCommits)
: GetRewrittenCommitHash(new ObjectHash(tag.Object), rewrittenCommits);
// points to commit
var rewrittenTag = tag.WithNewObject(rewrittenObjectHash.ToString());
HashContent.WriteObject(vcsPath, rewrittenTag);
var path = Path.Combine(vcsPath, "refs/tags", rewrittenTag.TagName);
File.WriteAllText(path, rewrittenTag.Hash.ToString());
return(rewrittenTag.Hash);
}
throw new NotImplementedException();
}
public static bool IsDefectiveTree(string vcsPath, Tree tree)
{
if (SeenTrees.TryGetValue(tree.Hash, out bool isDefective))
{
return(isDefective);
}
if (Tree.HasDuplicateLines(tree.Lines))
{
SeenTrees.TryAdd(tree.Hash, true);
return(true);
}
var childTrees = tree.GetDirectories();
foreach (var childTree in childTrees)
{
if (SeenTrees.TryGetValue(childTree.Hash, out isDefective))
{
if (isDefective)
{
return(true);
}
continue;
}
var childTreeObject = (Tree)GitObjectFactory.ReadGitObject(vcsPath, childTree.Hash);
if (IsDefectiveTree(vcsPath, childTreeObject))
{
return(true);
}
}
SeenTrees.TryAdd(tree.Hash, false);
return(false);
}
