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#compdef update-alternatives

local curcontext="$curcontext" context state line alterdir

if [[ -d /var/lib/dpkg/alternatives ]]; then
  alterdir=/var/lib/dpkg/alternatives
elif [[ -d /var/lib/rpm/alternatives/ ]]; then
  alterdir=/var/lib/rpm/alternatives
fi

_arguments -C \
  '--verbose' \
  '--quiet' \
  '--test' \
  '--help' \
  '--version' \
  '--altdir:altdir:_files -/' \
  '--admindir:admindir:_files -/' \
  '--log:log file:_files -/' \
  '--force' \
  '--skip-auto' \
  '--install:*::alt:= ->install' \
  '--remove:*::alt:= ->remove' \
  '--remove-all:name:_files -W "$alterdir"' \
  '--auto:name:_files -W "$alterdir"' \
  '--display:name:_files -W "$alterdir"' \
  '--query:name:_files -W "$alterdir"' \
  '--list:name:_files -W "$alterdir"' \
  '--get-selections' \
  '--set-selections' \
  '--config:name:_files -W "$alterdir"' \
  '--set:name:_files -W "$alterdir":path:_files -/' \
  '--all' && return

while true; do
  case "$state" in
    islave)
      _call_function ret _update_alternatives_$state && return ret
      state=
      _arguments -C \
        '1:link:_files' \
        '2:name:_files -W "$alterdir"' \
        '3:path:_files' \
        '--slave:*::more:= ->islave' && return
      [[ -z $state ]] && return 1
    ;;

    install)
      _call_function ret _update_alternatives_$state && return ret
      _arguments -C \
        '1:link:_files' \
        '2:name:_files -W "$alterdir"' \
        '3:path:_files' \
        '4:priority:' \
        '--slave:*::slave:= ->islave' && return
      [[ -z $state ]] && return 1
    ;;

    remove)
      _call_function ret _update_alternatives_$state && return ret
      _arguments \
        '1:name:_files -W "$alterdir"' \
        '2:path:_files'
      return
    ;;

    *) return 1 ;;
  esac
done