/// <summary>
/// Lookup and return the git object in the repository as specified
/// by the given ID.
/// </summary>
/// <param name="id">The object id to lookup</param>
/// <returns>The Git object specified by the given ID</returns>
public unsafe T Lookup <T>(ObjectId id) where T : GitObject
{
Ensure.ArgumentNotNull(id, "id");
git_oid oid = id.ToNative();
if (typeof(T) == typeof(Commit))
{
git_commit *obj = null;
Ensure.NativeSuccess(() => libgit2.git_commit_lookup(out obj, repository.NativeRepository, ref oid), repository);
return((T)(object)Commit.FromNative(obj, id));
}
else if (typeof(T) == typeof(Tree))
{
git_tree *obj = null;
Ensure.NativeSuccess(() => libgit2.git_tree_lookup(out obj, repository.NativeRepository, ref oid), repository);
return((T)(object)Tree.FromNative(obj, id));
}
else if (typeof(T) == typeof(Blob))
{
git_blob *obj = null;
Ensure.NativeSuccess(() => libgit2.git_blob_lookup(out obj, repository.NativeRepository, ref oid), repository);
return((T)(object)Blob.FromNative(obj, id));
}
else if (typeof(T) == typeof(GitObject))
{
return((T)(object)Lookup(id));
}
throw new InvalidOperationException("unknown object type");
}
private unsafe Commit(git_commit *nativeCommit, ObjectId id) :
base((git_object *)nativeCommit, id)
{
author = new LazyNative <Signature>(() => {
git_signature *author = libgit2.git_commit_author(NativeCommit);
return(Signature.FromNative(author));
}, this);
committer = new LazyNative <Signature>(() => {
git_signature *signature = libgit2.git_commit_committer(NativeCommit);
return(Signature.FromNative(signature));
}, this);
treeId = new LazyNative <ObjectId>(() => {
git_oid *oid = libgit2.git_commit_tree_id(NativeCommit);
Ensure.NativePointerNotNull(oid);
return(ObjectId.FromNative(*oid));
}, this);
}
internal unsafe static Commit FromNative(git_commit *nativeCommit, ObjectId id)
{
return(new Commit(nativeCommit, id));
}
public static extern unsafe git_oid *git_commit_tree_id(git_commit *commit);
public static extern unsafe int git_commit_tree(out git_tree *tree, git_commit *commit);
public static extern unsafe int git_commit_lookup(out git_commit *obj, git_repository *repo, ref git_oid id);
public static extern unsafe git_signature *git_commit_committer(git_commit *commit);
