pkg/cri/opts.WithoutRunMount -> oci.WithoutRunMount

Move `pkg/cri/opts.WithoutRunMount` function to `oci.WithoutRunMount`
so that it can be used without dependency on CRI.

Also add `oci.WithoutMounts(dests ...string)` for generality.

Signed-off-by: Akihiro Suda <akihiro.suda.cz@hco.ntt.co.jp>

oci/spec_opts.go

@@ -273,6 +273,28 @@ func WithMounts(mounts []specs.Mount) SpecOpts {
 	}
 }
 
+// WithoutMounts removes mounts
+func WithoutMounts(dests ...string) SpecOpts {
+	return func(_ context.Context, _ Client, _ *containers.Container, s *Spec) error {
+		var (
+			mounts  []specs.Mount
+			current = s.Mounts
+		)
+	mLoop:
+		for _, m := range current {
+			mDestination := filepath.Clean(m.Destination)
+			for _, dest := range dests {
+				if mDestination == dest {
+					continue mLoop
+				}
+			}
+			mounts = append(mounts, m)
+		}
+		s.Mounts = mounts
+		return nil
+	}
+}
+
 // WithHostNamespace allows a task to run inside the host's linux namespace
 func WithHostNamespace(ns specs.LinuxNamespaceType) SpecOpts {
 	return func(_ context.Context, _ Client, _ *containers.Container, s *Spec) error {