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#compdef env genv

local context state line variant args ret=1

_pick_variant -r variant gnu=Free\ Soft $OSTYPE --version
case $variant in
  gnu)
    args=(
      '(-)'{-i,--ignore-environment}'[start with empty environment]'
      '(--ignore-environment -i --help --version)*'{-u+,--unset=}'[remove variable from the environment]:env var to remove:_parameters -g "*export*"'
      '(-C --chdir)'{-C+,--chdir=}'[change working directory]:directory:_directories'
      '(- *)--help[display help information]'
      '(- *)--version[display version information]'
    )
  ;;
  freebsd*)
    args=(
      '(-i)*-u[remove variable from the environment]:env var to remove:_parameters -g "*export*"'
      '-P[specify alternate executable search PATH]:path:_dir_list'
      '-S[perform word splitting]'
      '*-v[verbose output]'
    )
  ;&
  *)
    if (( $words[(i)-] < CURRENT )); then
      words[(i)-]=()
      (( CURRENT-- ))
    else
      args+=(
	'(-i)'{-,-i}'[start with empty environment]'
      )
    fi
  ;;
esac

_arguments $args \
  '*::arguments:->normal' && ret=0

if [[ -n $state ]]; then
  while [[ $words[1] = *=* ]]; do
    shift words
    (( CURRENT-- ))
  done
  _normal && ret=0
fi

return ret