public Watcher(string path, int interval, Func <BranchAdded, Task> branchAdded, Func <BranchChanged, Task> branchChanged, Func <BranchRemoved, Task> branchRemoved)
{
_logger = LogManager.GetLogger("watcher");
_interval = interval;
_branchAdded = branchAdded;
_branchChanged = branchChanged;
_branchRemoved = branchRemoved;
_repo = new Repository(path);
_branches = _repo.Branches
.Where(b => !b.IsRemote)
.ToBranchDictionary();
}
async Task check()
{
var previousBranches = _branches;
var currentBranches = _repo.Branches
.Where(b => !b.IsRemote)
.ToBranchDictionary();
_branches = currentBranches;
await raiseEventsForDifferences(previousBranches, currentBranches);
_timer.Change(_interval, Timeout.Infinite);
}
async Task raiseEventsForDifferences(BranchDictionary previousBranches, BranchDictionary currentBranches)
{
foreach (var branchInfo in currentBranches.Where(current => previousBranches.HasBranch(current.Name) && current.Commit != previousBranches[current.Name].Commit))
{
await raiseBranchChanged(previousBranches, branchInfo);
}
foreach (var branchInfo in currentBranches.Where(current => !previousBranches.HasBranch(current.Name)))
{
await raiseBranchAdded(branchInfo);
}
foreach (var branchInfo in previousBranches.Where(current => !currentBranches.HasBranch(current.Name)))
{
await raiseBranchDeleted(branchInfo);
}
}
async Task raiseBranchChanged(BranchDictionary previousBranches, BranchInfo branch)
{
try
{
var previousCommit = _repo.Lookup <Commit>(previousBranches[branch.Name].Commit);
var currentCommit = _repo.Lookup <Commit>(branch.Commit);
_logger.Trace($"Found differences on branch {branch.Name}, starting diff between {previousCommit.Sha} and {currentCommit.Sha}");
var result = _repo.Diff.Compare <TreeChanges>(previousCommit.Tree, currentCommit.Tree);
_logger.Info($"Finished diff on branch {branch.Name}, found {result.Added.Count()} added items, {result.Deleted.Count()} deleted items, {result.Renamed.Count()} renamed items and {result.Modified.Count()} modified items");
var eventInfo = getBranchChanged <BranchChanged>(result, branch);
eventInfo.PreviousCommit = previousCommit.Sha;
await _branchChanged(eventInfo);
}
catch (Exception ex)
{
_logger.Error(ex, $"Error while checking for changes on branch {branch}. Previous commit is {previousBranches[branch.Name].Commit}, Current commit is {branch.Commit}");
throw;
}
}