zsh-completion/_fx

#compdef fx

__fx_nodename() {
  # TODO: allow configuration of node names with zstyle
  local -a nodenames=( $(${fuchsia_dir}/out/build-zircon/tools/netls | awk '/device/ { print $2; }') )
  _describe 'nodename' nodenames
}

_fx() {
  typeset -A opt_args

  local fuchsia_dir="${FUCHSIA_DIR}"
  if [[ -z "${fuchsia_dir}" ]]; then
    fuchsia_dir="$(pwd)"
    while [[ ! -d "${fuchsia_dir}/.jiri_root" ]]; do
      fuchsia_dir="$(dirname "${fuchsia_dir}")"
      if [[ "${fuchsia_dir}" == "/" ]]; then
        _message -r "Cannot find Fuchsia source tree containing $(pwd)"
        return
      fi
    done
  fi

  # list of commands based on //scripts/devshell/
  # each file is read to find the description line (starts with "### ").
  local -a commands lines
  local desc command
  for command in ${fuchsia_dir}/scripts/devshell/*(.); do
    lines=("${(f)$(<${command})}")
    desc=${${lines[${lines[(i)\#\#\# *]}]}#????}
    commands+=("${command#*devshell/}:${desc}")
  done

  _arguments \
    "--config[config file]:filename:_files" \
    "1: :{_describe 'command' commands}" \
    "*:: :->args"

  if [[ $state != "args" ]]; then
    return
  fi

  # get the config file location from --config, $FUCHSIA_CONFIG or ${fuchsia_dir}/.config
  typeset -l fuchsia_config="${opt_args[--config]:-${FUCHSIA_CONFIG:-${fuchsia_dir}/.config}}"
  # if a config file is found read the build dir into a local variable
  typeset -l fuchsia_build_dir=
  if [[ -e ${fuchsia_config} ]]; then
    fuchsia_build_dir="$(source ${fuchsia_config};echo ${FUCHSIA_BUILD_DIR})"
  fi

  # look for a completion function
  local f
  f=_fx_$words[1]
  if [[ -e ${fuchsia_dir}/scripts/zsh-completion/$f ]]; then
    autoload $f; $f
  fi
}

_fx