What's the fastest way to find Tags pointing to Commits?

Question

With libgit2sharp I would like to do the following:

foreach( Commit commit in repo.Commits )
{
    // How to implement assignedTags?
    foreach( Tag tag in          


        

Answer 1

Here is another version of nulltoken's answer but with using ILookupclass instead of dictionary. A bit nicer IMO:

private static ILookup CreateCommitIdToTagLookup(Repository repo)
{
    var commitIdToTagLookup =
        repo.Tags
        .Select(tag => new { Commit = tag.PeeledTarget as Commit, Tag = tag })
        .Where(x => x.Commit != null)
        .ToLookup(x => x.Commit.Id, x => x.Tag);

    return commitIdToTagLookup;
}

and simple usage example:

using (var repo = new Repository("Path/to/your/repo"))
{
    var commitIdToTagLookup = CreateCommitIdToTagLookup(repo);

    foreach (var commit in repo.Commits)
    {
        foreach (var tag in commitIdToTagLookup[commit.Id])
        {
            Console.WriteLine($"Tag {tag.FriendlyName} points at {commit.Id}");
        }
    }
}