[ ! -z "${BASHRC_DISTR+x}" ] && return || readonly BASHRC_DISTR=1

checksums_path='sha1sums.txt'

update_checksums() {
  sha1sum "$@" > "$checksums_path"
}

update_checksums_distr() {
  update_checksums *.exe *.iso
}

verify_checksums() {
  sha1sum --check "$checksums_path"
}