1 files changed, 59 insertions, 0 deletions
diff --git a/refstore/files/update_write_loose.go b/refstore/files/update_write_loose.go
new file mode 100644
index 00000000..212be9a8
--- /dev/null
+++ b/refstore/files/update_write_loose.go
@@ -0,0 +1,59 @@
+package files
+
+import (
+	"fmt"
+	"os"
+	"path"
+	"strings"
+)
+
+func (executor *refUpdateExecutor) writePreparedLooseUpdate(item preparedUpdate) error {
+	root := executor.store.rootFor(item.target.loc.root)
+	lockName := item.target.loc.path + ".lock"
+
+	lock, err := root.OpenFile(lockName, os.O_WRONLY|os.O_TRUNC, 0o644)
+	if err != nil {
+		return err
+	}
+
+	var content string
+
+	switch item.op.kind {
+	case updateCreate, updateReplace:
+		content = item.op.newID.String() + "\n"
+	case updateCreateSymbolic, updateReplaceSymbolic:
+		content = "ref: " + strings.TrimSpace(item.op.newTarget) + "\n"
+	case updateDelete, updateVerify, updateDeleteSymbolic, updateVerifySymbolic:
+	default:
+		_ = lock.Close()
+
+		return fmt.Errorf("refstore/files: unsupported write operation %d", item.op.kind)
+	}
+
+	_, err = lock.WriteString(content)
+	if err != nil {
+		_ = lock.Close()
+
+		return err
+	}
+
+	err = lock.Close()
+	if err != nil {
+		return err
+	}
+
+	dir := path.Dir(item.target.loc.path)
+	if dir != "." {
+		err = root.MkdirAll(dir, 0o755)
+		if err != nil {
+			return err
+		}
+	}
+
+	err = executor.removeEmptyDirTree(item.target.loc)
+	if err != nil {
+		return err
+	}
+
+	return root.Rename(lockName, item.target.loc.path)
+}