GitRepoDigger.cs

namespace StashFileFetcher.Controllers
{
	using System.Diagnostics;
	using System.IO;
	using System.Text;
	using LibGit2Sharp;

	class RepoDigger : IDisposable
	{
		public static RepoDigger GetRepositoryInformationForPath(string path)
		{
			if (LibGit2Sharp.Repository.IsValid(path))
			{
				return new RepoDigger(path);
			}
			return null;
		}


		public string GetFileAtRevision(string filePath, string revision)
		{
			var commit = _repo.Lookup<Commit>(revision);
			var treeEntry = commit[filePath];
			Debug.Assert(treeEntry.TargetType == TreeEntryTargetType.Blob);
			var blob = (Blob)treeEntry.Target;
			var contentStream = blob.GetContentStream();

			string content;
			using (var tr = new StreamReader(contentStream, Encoding.UTF8))
			{
				content = tr.ReadToEnd();
			}

			return content;
		}


		public string CommitHash
		{
			get
			{
				return _repo.Head.Tip.Sha;
			}
		}


		public bool HasUnpushedCommits
		{
			get
			{
				return _repo.Head.TrackingDetails.AheadBy > 0;
			}
		}

		public bool HasUncommittedChanges
		{
			get
			{
				return _repo.RetrieveStatus().Any(s => s.State != FileStatus.Ignored);
			}
		}

		public IEnumerable<Commit> Log
		{
			get
			{
				return _repo.Head.Commits;
			}
		}

		public void Dispose()
		{
			if (!_disposed)
			{
				_disposed = true;
				_repo.Dispose();
			}
		}

		private RepoDigger(string path)
		{
			_repo = new Repository(path);
		}

		private bool _disposed;
		private readonly Repository _repo;
	}
}