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#compdef locale

local curcontext="$curcontext" state state_descr line expl ret=1
typeset -A opt_args; local -a specs aopts

if _pick_variant gnu='(GNU|EGLIBC)' unix --version; then

  local exargs="-? --help --usage -V --version"

  aopts=( -A "-*" -C -S -s )
  specs=(
    '(- *)'{-\?,--help}'[display help information]'
    '(- *)--usage[display a short usage message]'
    '(- *)'{-V,--version}'[print program version]'
    - set1
    "(-a --all-locales $exargs)"{-a,--all-locales}'[list all available locales]'
    "(-v --verbose $exargs)"{-v,--verbose}'[display additional information]'
    - set2
    "(-m --charmaps $exargs)"{-m,--charmaps}'[list all available charmaps]'
    - set3
    "(-c --category-name $exargs)"{-c,--category-name}'[print also locale category]'
    "(-k --keyword-name $exargs)"{-k,--keyword-name}'[print also keyword of each value]'
    '*:name:->catkey'
  )

elif [[ $OSTYPE == openbsd* ]]; then

  specs=(
    '(-m)-a[list all available locales]'
    '(-a)-m[list all available charmaps]'
  )

else

  aopts=( -C -A "-*" )
  specs=(
    - set1
    '-a[list all available locales]'
    - set2
    '-m[list all available charmaps]'
    - set3
    '-c[print also locale category]'
    '-k[print also keyword of each value]'
    '*:name:->catkey'
  )
fi

_arguments $aopts : $specs && ret=0

if [[ $state == catkey ]]; then
  typeset -aU cats keys

  case $OSTYPE in
    *bsd*)
      # keywords from comparing locale -k list on netbsd and freebsd
      # the additional keywords freebsd supports will be added via
      # the reassignment of keys
      keys+=(
        charmap decimal_point thousands_sep grouping radixchar thousep int_curr_symbol
        currency_symbol mon_decimal_point mon_thousands_sep mon_grouping positive_sign
        negative_sign int_frac_digits frac_digits p_cs_precedes p_sep_by_space n_cs_precedes
        n_sep_by_space p_sign_posn n_sign_posn int_p_cs_precedes int_p_sep_by_space
        int_n_cs_precedes int_n_sep_by_space int_p_sign_posn int_n_sign_posn d_t_fmt d_fmt
        t_fmt am_str pm_str t_fmt_ampm day_1 day_2 day_3 day_4 day_5 day_6 day_7 abday_1
        abday_2 abday_3 abday_4 abday_5 abday_6 abday_7 mon_1 mon_2 mon_3 mon_4 mon_5 mon_6
        mon_7 mon_8 mon_9 mon_10 mon_11 mon_12 abmon_1 abmon_2 abmon_3 abmon_4 abmon_5
        abmon_6 abmon_7 abmon_8 abmon_9 abmon_10 abmon_11 abmon_12 era era_d_fmt era_d_t_fmt
        era_t_fmt alt_digits yesexpr noexpr yesstr nostr
      );|
    (free|net|dragonfly)bsd*) (( words[(I)-k] )) && keys+=(list);;
    *)
      cats=( ${${${(f)"$(locale)"}%=*}%(LANG|LANGUAGE|LC_ALL)} )
    ;;
  esac

  keys=( $keys ${${(f)"$(locale -k $cats 2>/dev/null)"}%=*} )
  if [[ $OSTYPE == freebsd* ]] && (( words[(I)list] )); then
    _message -e values prefix && ret=0
  else
    _wanted values expl name compadd "$@" -a - cats keys && ret=0
  fi
fi

return ret