T getBranchChanged <T>(TreeChanges changes, BranchInfo branchInfo) where T : BranchModification, new() =>
new T
{
Branch = branchInfo,
Added = changes.Added.Select(a => new ItemAdded
{
Key = a.Path,
Value = getBlobValue(a.Oid)
}).ToList(),
Modified = changes.Modified.Select(m => new ItemModified
{
Key = m.Path,
Value = getBlobValue(m.Oid),
OldValue = getBlobValue(m.OldOid)
}).ToList(),
Renamed = changes.Renamed.Select(r => new ItemRenamed
{
Key = r.Path,
Value = getBlobValue(r.Oid),
OldValue = getBlobValue(r.OldOid),
OldKey = r.OldPath
}).ToList(),
Deleted = changes.Deleted.Select(d => new ItemDeleted {
Key = d.Path, Value = getBlobValue(d.OldOid)
}).ToList()
};
void raiseBranchAdded(BranchInfo branch)
{
try
{
_logger.Info($"Detected a new branch {branch}");
var currentCommit = _repo.Lookup <Commit>(branch.Commit);
var previousCommit = currentCommit;
string baseBranch = null;
_logger.Trace("Searching a base branch");
do
{
baseBranch = _repo.Branches.FirstOrDefault(b => b.Tip.Sha == previousCommit.Sha && b.FriendlyName != branch.Name)?.FriendlyName;
if (baseBranch == null)
{
previousCommit = previousCommit.Parents.FirstOrDefault();
}
} while (baseBranch == null && previousCommit != null);
if (previousCommit == null)
{
var otherBranch = _repo.Branches.FirstOrDefault(b => b.FriendlyName != branch.Name);
if (otherBranch != null)
{
previousCommit = otherBranch.Tip;
baseBranch = otherBranch.FriendlyName;
_logger.Trace($"Could not find a base branch for the newly created branch {branch}, taking {baseBranch} and starting diff between {previousCommit.Sha} and {currentCommit.Sha}");
}
else
{
_logger.Error($"Could not find any base branch for the newly created branch {branch}, skipping raising an event");
return;
}
}
else
{
_logger.Trace($"Found base branch {baseBranch} for {branch}, starting diff between {previousCommit.Sha} and {currentCommit.Sha}");
}
var result = _repo.Diff.Compare <TreeChanges>(previousCommit.Tree, currentCommit.Tree);
_logger.Info($"Finished diff, found {result.Added.Count()} added items, {result.Deleted.Count()} deleted items, {result.Renamed.Count()} renamed items and {result.Modified.Count()} modified items");
var eventInfo = getBranchChanged <BranchAdded>(result, branch);
eventInfo.BaseBranch = baseBranch;
BranchAdded?.Invoke(eventInfo);
}
catch (Exception ex)
{
_logger.Error($"Error while checking new branch {branch}: {ex.Message}");
throw;
}
}
void raiseBranchDeleted(BranchInfo branchInfo)
{
try
{
_logger.Info($"Detected deletion of branch {branchInfo.Name}");
BranchRemoved?.Invoke(new BranchRemoved {
Branch = branchInfo
});
}
catch (Exception ex)
{
_logger.Error($"Error while checking deleted branch {branchInfo.Name}: {ex.Message}");
throw;
}
}
void raiseBranchChanged(BranchDictionary previousBranches, BranchInfo branch)
{
try
{
var previousCommit = _repo.Lookup <Commit>(previousBranches[branch.Name].Commit);
var currentCommit = _repo.Lookup <Commit>(branch.Commit);
_logger.Trace($"Found differences on branch {branch}, starting diff between {previousCommit.Sha} and {currentCommit.Sha}");
var result = _repo.Diff.Compare <TreeChanges>(previousCommit.Tree, currentCommit.Tree);
_logger.Info($"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;
BranchChanged?.Invoke(eventInfo);
}
catch (Exception ex)
{
_logger.Error($"Error while checking for changes on branch {branch}. Previous commit is {previousBranches[branch.Name].Commit}, Current commit is {branch.Commit}. {ex.Message}");
throw;
}
}