# _packages completes a comma separated list of packages
_packages() {
  # packages are files without extensions in */packages/ and vendor/*/packages/
  _values -s , $(cd ${fuchsia_dir} && echo */packages/**/^*.*(.N) vendor/*/packages/**/^*.*(.N))
}

# _products completes a comma separated list of products
_products() {
  # products are .gni files in */products/ and vendor/*/products/
  _values -s , $(cd ${fuchsia_dir} && echo */products/**/*.gni(.N) vendor/*/products/**/*.gni(.N))
}

_gn_args_caching_policy() {
  test ${ninja_file} -nt $1
}

_gn_args() {
  if [ -z ${fuchsia_build_dir} ]; then
    return
  fi

  # apply a default caching policy if one isn't configured
  local cache_policy
  zstyle -s ":completion:${curcontext}:" cache-policy cache_policy
  zstyle ":completion:${curcontext}:" cache-policy \
      ${cache_policy:-_gn_args_caching_policy}

  # if this file is newer than the cache file then the cache is stale
  local ninja_file=${fuchsia_dir}/${fuchsia_build_dir}/build.ninja

  local -a gn_args
  if ! _retrieve_cache gn_args ; then
    gn_args=( $(${fuchsia_dir}/buildtools/gn args ${fuchsia_dir}/${fuchsia_build_dir} --list --short|sed -e 's/ .*//') )
    _store_cache gn_args gn_args
  fi

  # complete the list of gn args with an = suffix
  compadd -S = ${gn_args}
}

# list of supported fuchsia architectures
local -a archs
archs=(
  'x64:64 bit Intel'
  'arm64:64 bit ARM'
)

# arguments to fx set
_arguments '1:arch:{_describe "arch" archs}' \
  '2::build_dir:{__fx_build_dir}' \
  '(:)--release[release build]' \
  '(:)--packages[packages to build]:packages:_packages' \
  '(:)--products[products to build]:products:_products' \
  '(:)--goma[use goma]' "--no-goma[don't use goma]" \
  "(:)--no-ensure-goma[don't make sure goma is running]" \
  "(:)--ccache[use ccache]" "--no-ccache[don't use ccache]" \
  "(:)--args[arguments for gn gen]:args:{_gn_args}" \
  '(:)--goma-dir[goma directory to use]:directory:_files -/'