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#compdef cpupower

local -a ret state cmds args expl context line

_arguments \
  '(-h --help)'{-h,--help}'[print usage information]' \
  '(-v --version)'{-v,--version}'[print package name and version]' \
  ':cmd:->cmds' \
  '*::arg:->args' && ret=0

case $state in
  cmds)
    cmds=(
      'frequency-info:show current frequency info'
      'frequency-set:set frequency parameters'
      'idle-info:show current idle state info'
      'idle-set:set idle state parameters'
      'info:show global power parameters'
      'set:set global power parameters'
      'monitor:report frequency and idle statistics'
      'help:print usage information'
    )
    _describe cmd cmds && ret=0
  ;;
  args)
    args=( )
    case ${words[1]} in
      frequency-info)
        args+=(
          '(-e --debug)'{-e,--debug}'[print debug info]'
          '(-f --freq)'{-f,--freq}'[show current frequency]'
          '(-w --hwfreq)'{-w,--hwfreq}'[show current hardware frequency]'
          '(-l --hwlimits)'{-l,--hwlimits}'[show min/max frequency allowed]'
          '(-d --driver)'{-d,--driver}'[show the kernel driver in use]'
          '(-p --policy)'{-p,--policy}'[show the current cpufreq policy]'
          '(-g --governors)'{-g,--governors}'[show available governers]'
          '(-r --related-cpus)'{-a,--related-cpus}'[show cpus that run at the same frequency]'
          '(-a --affected-cpus)'{-a,--affected-cpus}'[show software controlled cpus]'
          '(-s --stats)'{-s,--stats}'[show cpufreq statistics]'
          '(-y --latency)'{-y,--latency}'[show frequency change latency]'
          '(-o --proc)'{-o,--proc}'[print old style proc info]'
          '(-m --human)'{-m,--human}'[use human readable output]'
          '(-n --no-rounding)'{-n,--no-rounding}'[disable rounding of values]'
        )
        ;;
      frequency-set)
        args+=(
          '(-d --min)'{-d,--min}'[new minimum frequency]:freq:->freq'
          '(-u --max)'{-u,--max}'[new maximum frequency]:freq:->freq'
          '(-g --governor)'{-g,--governor}'[new cpufreq governor]:gov:->gov'
          '(-f --freq)'{-f,--freq}'[new frequency for userspace governor]:freq->freq'
          '(-r --related)'{-r,--related}'[modify all hardware related cpus]'
        )
        ;;
      idle-info)
        args+=(
          '(-f --silent)'{-f,--silent}'[print summary only]'
          '(-e --proc)'{-e,--proc}'[print old style proc info]'
        )
        ;;
      idle-set)
        args+=(
          '(-d --disable)'{-d,--disable}'[disable specific sleep state]:stateno'
          '(-e --enable)'{-e,--enable}'[enable specific sleep state]:stateno'
          '(-D --disable-by-latency)'{-D,--disable-by-latency}'[disable state based on latency]:latency'
          '(-E --enable-all)'{-E,--enable-all}'[enable all idle states]'
        )
        ;;
      info)
        args+=(
          '(-b --perf-bias)'{-b,--perf-bias}'[show intel performance bias value]'
        )
        ;;
      set)
        args+=(
          '(-b --perf-bias)'{-b,--perf-bias}'[set intel performance bias value]:pbias'
        )
        ;;
      monitor)
        args+=(
          '-l[list available monitors]'
          '-m[display the given monitors]:mon'
          '-i[mesurement interval]:secs'
          '-c[schedule on every core]'
          '-v[increase verbosity]'
        )
        ;;
    esac
    _arguments "${args[@]}" && ret=0
    case $state in
      freq)
	compadd $(cpupower frequency-info |
		sed -n 's/ //g; s/,/ /g; s/availablefrequencysteps://p')
        ;;
      gov)
        compadd $(cpupower frequency-info -g | sed 1d)
        ;;
    esac
    ;;
esac

return ret