commitquery: Error handling cleanup after the fetcher port

Still a few weird parts, but I forgot what those helpers were for,
and the semantics were a bit awkward... will check later™

2 files changed, 12 insertions, 55 deletions

diff --git a/commitquery/query_load_by_oid.go b/commitquery/query_load_by_oid.go
index b9860a05..f9c956ee 100644
--- a/commitquery/query_load_by_oid.go
+++ b/commitquery/query_load_by_oid.go
@@ -3,11 +3,7 @@ package commitquery
 import (
 	stderrors "errors"
 
-	giterrors "codeberg.org/lindenii/furgit/errors"
 	commitgraphread "codeberg.org/lindenii/furgit/format/commitgraph/read"
-	"codeberg.org/lindenii/furgit/object/commit"
-	objectstore "codeberg.org/lindenii/furgit/object/store"
-	objecttype "codeberg.org/lindenii/furgit/object/type"
 )
 
 // loadByOID populates one node from an object ID.
@@ -25,34 +21,21 @@ func (query *query) loadByOID(idx nodeIndex) error {
 		}
 	}
 
-	obj, err := query.fetcher.ExactObject(id)
+	commit, err := query.fetcher.ExactCommit(id)
 	if err != nil {
-		if stderrors.Is(err, objectstore.ErrObjectNotFound) {
-			return &giterrors.ObjectMissingError{OID: id}
-		}
-
 		return err
 	}
 
-	commitObj, ok := obj.Object().(*commit.Commit)
-	if !ok {
-		return &giterrors.ObjectTypeError{
-			OID:  id,
-			Got:  obj.Object().ObjectType(),
-			Want: objecttype.TypeCommit,
-		}
-	}
-
-	parents := make([]parentRef, 0, len(commitObj.Parents))
-	for _, parentID := range commitObj.Parents {
+	parents := make([]parentRef, 0, len(commit.Object().Parents))
+	for _, parentID := range commit.Object().Parents {
 		parents = append(parents, parentRef{ID: parentID})
 	}
 
-	commit := commitData{
+	commitData := commitData{
 		ID:         id,
 		Parents:    parents,
-		CommitTime: commitObj.Committer.WhenUnix,
+		CommitTime: commit.Object().Committer.WhenUnix,
 	}
 
-	return query.populateNode(idx, commit)
+	return query.populateNode(idx, commitData)
 }
diff --git a/commitquery/query_resolve_commitish.go b/commitquery/query_resolve_commitish.go
index a9ad8bb5..1e14a1c0 100644
--- a/commitquery/query_resolve_commitish.go
+++ b/commitquery/query_resolve_commitish.go
@@ -1,39 +1,13 @@
 package commitquery
 
-import (
-	stderrors "errors"
-
-	giterrors "codeberg.org/lindenii/furgit/errors"
-	"codeberg.org/lindenii/furgit/object/commit"
-	objectid "codeberg.org/lindenii/furgit/object/id"
-	objectstore "codeberg.org/lindenii/furgit/object/store"
-	"codeberg.org/lindenii/furgit/object/tag"
-	objecttype "codeberg.org/lindenii/furgit/object/type"
-)
+import objectid "codeberg.org/lindenii/furgit/object/id"
 
 // resolveCommitish peels one commit-ish object ID and resolves the commit.
 func (query *query) resolveCommitish(id objectid.ObjectID) (nodeIndex, error) {
-	for {
-		obj, err := query.fetcher.ExactObject(id)
-		if err != nil {
-			if stderrors.Is(err, objectstore.ErrObjectNotFound) {
-				return 0, &giterrors.ObjectMissingError{OID: id}
-			}
-
-			return 0, err
-		}
-
-		switch parsed := obj.Object().(type) {
-		case *commit.Commit:
-			return query.resolveOID(id)
-		case *tag.Tag:
-			id = parsed.Target
-		default:
-			return 0, &giterrors.ObjectTypeError{
-				OID:  id,
-				Got:  parsed.ObjectType(),
-				Want: objecttype.TypeCommit,
-			}
-		}
+	id, err := query.fetcher.PeelToCommitID(id)
+	if err != nil {
+		return 0, err
 	}
+
+	return query.resolveOID(id)
 }