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fermo
0.6.4
0.20.1
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0.18.0
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0.1.3
0.1.2
0.1.1
0.1.0
A static site generator
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lib/fermo/assets.ex
defmodule Fermo.Assets do
use GenServer
@moduledoc """
Handles the external (Webpack) pipeline.
Runs the pipeline, then loads the manifest it produces into a GenServer
in order to provide asset name mapping.
"""
def init(args) do
{:ok, args}
end
def start_link() do
GenServer.start_link(__MODULE__, %{}, name: :assets)
end
def build(config) do
System.cmd("yarn", ["run", "webpack"]) |> handle_build_result(config)
end
defp handle_build_result({_output, 0}, config) do
manifest = "build/manifest.json"
|> File.read!
|> Jason.decode!
GenServer.call(:assets, {:put, manifest})
put_in(config, [:stats, :assets_build_started], Time.utc_now)
end
defp handle_build_result({output, _exit_status}, _config) do
raise "External webpack pipeline failed to build\n\n#{output}"
end
def manifest do
GenServer.call(:assets, {:manifest})
end
def path(name) do
GenServer.call(:assets, {:path, name})
end
def path!(name) do
{:ok, path} = path(name)
path
end
def handle_call({:put, state}, _from, _state) do
{:reply, {:ok}, state}
end
def handle_call({:manifest}, _from, state) do
{:reply, {:ok, state}, state}
end
def handle_call({:path, name}, _from, state) do
if Map.has_key?(state, name) do
path = state[name]
{:reply, {:ok, path}, state}
else
{:reply, {:error, "'#{name}' not found in manifest"}, state}
end
end
end