#!/bin/sh -e

clearopaques() {
    # opaque directories are created when a layer creates a directory that does
    # not exist in one of its currently mounted lower layers.  preserving the
    # layer's illusion of being the progenitor of a directory when mounted with
    # different lower layers is incompatible with lix's operation, and blocking
    # another layer's files in general is unsupported behavior as far as lix is
    # concerned.  this strips all directories of the "opaque" attribute.

    find "$1" -type d -exec setfattr -x trusted.overlay.opaque {} \; 2>/dev/null \
    || true # find returns nonzero if no 'opaque' files were found.
}