repository: Split

1 files changed, 64 insertions, 0 deletions

diff --git a/repository/open_objects.go b/repository/open_objects.go
new file mode 100644
index 00000000..61fc0f93
--- /dev/null
+++ b/repository/open_objects.go
@@ -0,0 +1,64 @@
+package repository
+
+import (
+	"errors"
+	"fmt"
+	"os"
+
+	"codeberg.org/lindenii/furgit/objectid"
+	"codeberg.org/lindenii/furgit/objectstore"
+	objectloose "codeberg.org/lindenii/furgit/objectstore/loose"
+	objectmix "codeberg.org/lindenii/furgit/objectstore/mix"
+	objectpacked "codeberg.org/lindenii/furgit/objectstore/packed"
+)
+
+func openObjectStore(root *os.Root, algo objectid.Algorithm) (objectstore.Store, *objectloose.Store, error) {
+	objectsRoot, err := root.OpenRoot("objects")
+	if err != nil {
+		return nil, nil, fmt.Errorf("repository: open objects: %w", err)
+	}
+
+	looseStore, err := objectloose.New(objectsRoot, algo)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	backends := []objectstore.Store{looseStore}
+
+	packRoot, err := objectsRoot.OpenRoot("pack")
+	if err == nil {
+		var packedStore *objectpacked.Store
+
+		packedStore, err = objectpacked.New(packRoot, algo)
+		if err != nil {
+			_ = looseStore.Close()
+
+			return nil, nil, err
+		}
+
+		backends = append(backends, packedStore)
+	} else if !errors.Is(err, os.ErrNotExist) {
+		_ = looseStore.Close()
+
+		return nil, nil, fmt.Errorf("repository: open objects/pack: %w", err)
+	}
+
+	objectsChain := objectmix.New(backends...)
+
+	objectsRootForWriting, err := root.OpenRoot("objects")
+	if err != nil {
+		_ = objectsChain.Close()
+
+		return nil, nil, fmt.Errorf("repository: open objects for loose writing: %w", err)
+	}
+
+	objectsLooseForWritingOnly, err := objectloose.New(objectsRootForWriting, algo)
+	if err != nil {
+		_ = objectsRootForWriting.Close()
+		_ = objectsChain.Close()
+
+		return nil, nil, err
+	}
+
+	return objectsChain, objectsLooseForWritingOnly, nil
+}