Urgh I made some wrong amends and I'm too tired to separate the commits out this time

ancestor: Split out of reachability
mergebase: Add merge base routines
internal/commitquery: Add commit query context engine thingy
internal/peel: Shared tag peeling
errors: Shared object query errors
internal/testgit: Add rooted repo helpers; remove raw path access
objectstore/memory: Add in-memory object store
objectid: Add Compare helper

1 files changed, 37 insertions, 0 deletions

diff --git a/objectstore/memory/read_bytes.go b/objectstore/memory/read_bytes.go
new file mode 100644
index 00000000..31c5b3d1
--- /dev/null
+++ b/objectstore/memory/read_bytes.go
@@ -0,0 +1,37 @@
+package memory
+
+import (
+	"codeberg.org/lindenii/furgit/objectheader"
+	"codeberg.org/lindenii/furgit/objectid"
+	"codeberg.org/lindenii/furgit/objectstore"
+	"codeberg.org/lindenii/furgit/objecttype"
+)
+
+// ReadBytesFull reads one full object, including the object header.
+func (store *Store) ReadBytesFull(id objectid.ObjectID) ([]byte, error) {
+	obj, ok := store.objects[id]
+	if !ok {
+		return nil, objectstore.ErrObjectNotFound
+	}
+
+	header, ok := objectheader.Encode(obj.ty, int64(len(obj.content)))
+	if !ok {
+		panic("failed to encode object header")
+	}
+
+	raw := make([]byte, len(header)+len(obj.content))
+	copy(raw, header)
+	copy(raw[len(header):], obj.content)
+
+	return raw, nil
+}
+
+// ReadBytesContent reads one object body.
+func (store *Store) ReadBytesContent(id objectid.ObjectID) (objecttype.Type, []byte, error) {
+	obj, ok := store.objects[id]
+	if !ok {
+		return objecttype.TypeInvalid, nil, objectstore.ErrObjectNotFound
+	}
+
+	return obj.ty, append([]byte(nil), obj.content...), nil
+}