bootstrapper: allow building without cgo dependencies for linting

bootstrapper/internal/diskencryption/diskencryption_cross.go

@@ -0,0 +1,50 @@
+//go:build !linux || !cgo
+
+/*
+Copyright (c) Edgeless Systems GmbH
+
+SPDX-License-Identifier: AGPL-3.0-only
+*/
+
+/*
+Package diskencryption handles interaction with a node's state disk.
+
+This package is not thread safe, since libcryptsetup is not thread safe.
+There should only be one instance using this package per process.
+*/
+package diskencryption
+
+import "errors"
+
+// Cryptsetup manages the encrypted state mapper device.
+type Cryptsetup struct{}
+
+// New creates a new Cryptsetup.
+// This function panics if CGO is disabled.
+func New() *Cryptsetup {
+	return &Cryptsetup{}
+}
+
+// Open opens the cryptdevice.
+// This function does nothing if CGO is disabled.
+func (c *Cryptsetup) Open() error {
+	return errors.New("using cryptsetup requires building with CGO")
+}
+
+// Close closes the cryptdevice.
+// This function errors if CGO is disabled.
+func (c *Cryptsetup) Close() error {
+	return errors.New("using cryptsetup requires building with CGO")
+}
+
+// UUID gets the device's UUID.
+// This function errors if CGO is disabled.
+func (c *Cryptsetup) UUID() (string, error) {
+	return "", errors.New("using cryptsetup requires building with CGO")
+}
+
+// UpdatePassphrase switches the initial random passphrase of the mapped crypt device to a permanent passphrase.
+// This function errors if CGO is disabled.
+func (c *Cryptsetup) UpdatePassphrase(_ string) error {
+	return errors.New("using cryptsetup requires building with CGO")
+}