⚙️ Add ability to build from Dockerfiles directly

vendor/github.com/containerd/continuity/fs/utimesnanoat.go

@@ -0,0 +1,33 @@
+//go:build !(windows || linux)
+// +build !windows,!linux
+
+/*
+   Copyright The containerd Authors.
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
+package fs
+
+import (
+	"syscall"
+
+	"golang.org/x/sys/unix"
+)
+
+func utimesNano(name string, atime, mtime syscall.Timespec) error {
+	at := unix.NsecToTimespec(atime.Nano())
+	mt := unix.NsecToTimespec(mtime.Nano())
+	utimes := [2]unix.Timespec{at, mt}
+	return unix.UtimesNanoAt(unix.AT_FDCWD, name, utimes[0:], unix.AT_SYMLINK_NOFOLLOW)
+}