option

type Alerter interface {
	Printf(format string, v ...interface{})
}

type Option struct {
	// To facilitate querying of sysfs filesystems that are bind-mounted to a
	// non-default root mountpoint, we allow users to set the GHW_CHROOT environ
	// vairable to an alternate mountpoint. For instance, assume that the user of
	// ghw is a Golang binary being executed from an application container that has
	// certain host filesystems bind-mounted into the container at /host. The user
	// would ensure the GHW_CHROOT environ variable is set to "/host" and ghw will
	// build its paths from that location instead of /
	Chroot *string

	// Snapshot contains options for handling ghw snapshots
	Snapshot *SnapshotOptions

	// Alerter contains the target for ghw warnings
	Alerter Alerter
}

type SnapshotOptions struct {
	// Path allows users to specify a snapshot (captured using ghw-snapshot) to be
	// automatically consumed. Users need to supply the path of the snapshot, and
	// ghw will take care of unpacking it on a temporary directory.
	// Set the environment variable "GHW_SNAPSHOT_PRESERVE" to make ghw skip the cleanup
	// stage and keep the unpacked snapshot in the temporary directory.
	Path string
	// Root is the directory on which the snapshot must be unpacked. This allows
	// the users to manage their snapshot directory instead of ghw doing that on
	// their behalf. Relevant only if SnapshotPath is given.
	Root *string
	// Exclusive tells ghw if the given directory should be considered of exclusive
	// usage of ghw or not If the user provides a Root. If the flag is set, ghw will
	// unpack the snapshot in the given SnapshotRoot iff the directory is empty; otherwise
	// any existing content will be left untouched and the unpack stage will exit silently.
	// As additional side effect, give both this option and SnapshotRoot to make each
	// context try to unpack the snapshot only once.
	Exclusive bool
}