Merge pull request #284487 from alyssais/compressFirmwareXz

firmware:

let

  args = lib.optionalAttrs (firmware ? meta) { inherit (firmware) meta; };

  args = {

    allowedRequisites = [];

  } // lib.optionalAttrs (firmware ? meta) { inherit (firmware) meta; };

in

runCommand "${firmware.name}-xz" args ''

          sh -c 'xz -9c -T1 -C crc32 --lzma2=dict=2MiB "${firmware}/$1" > "$1.xz"' --)

  (cd ${firmware} && find lib/firmware -type l) | while read link; do

      target="$(readlink "${firmware}/$link")"

      if [ -f $target ]; then

      if [ -f "${firmware}/$link" ]; then

        ln -vs -- "''${target/^${firmware}/$out}.xz" "$out/$link.xz"

      else

        ln -vs -- "''${target/^${firmware}/$out}" "$out/$link"

      fi

  done

  echo "Checking for broken symlinks:"

  find -L $out -type l -print -execdir false -- '{}' '+'

''