private void PreprocessHeadDeletion(Commit existed, DeleteHeadBehavior deleteHeadBehavior)
{
if (deleteHeadBehavior == DeleteHeadBehavior.Deny)
{
throw new Exception("cannot remove head when DeleteHeadBehavior.Deny");
}
if (deleteHeadBehavior == DeleteHeadBehavior.Detach)
{
MappingInfo.Head = Const.DETACHEDHEAD;
}
else
{
if (existed.SourceType == CommitSourceType.Initial)
{
MappingInfo.Head = Const.DETACHEDHEAD;
}
else if (existed.SourceType == CommitSourceType.Single)
{
MappingInfo.Head = existed.Sources[0];
}
else
{
if (deleteHeadBehavior == DeleteHeadBehavior.AllowSingleDetachMerge)
{
MappingInfo.Head = Const.DETACHEDHEAD;
}
else
{
throw new Exception("cannot process deletion of merged head with DeleteHeadBehavior." + deleteHeadBehavior);
}
}
}
}
/// <summary>
/// Удаляет коммит и все его зависимости
/// </summary>
/// <param name="commitHash"></param>
/// <param name="deleteHeadBehavior"></param>
public void Delete(string commitHash, DeleteHeadBehavior deleteHeadBehavior = DeleteHeadBehavior.Deny)
{
var existed = MappingInfo.Resolve(commitHash);
if (null == existed)
{
return;
}
if (MappingInfo.Head == existed.Hash)
{
PreprocessHeadDeletion(existed, deleteHeadBehavior);
}
MappingInfo.Changed = true;
MappingInfo.Commits.Remove(existed.Hash);
foreach (var c in MappingInfo.Commits.Values)
{
if (c.HasSources())
{
if (c.Sources.Contains(existed.Hash))
{
c.MergeSources(existed);
c.Sources.Remove(existed.Hash);
c.Normalize();
}
}
}
MappingInfo.Normalize();
}
