Get path data from config vars

lib/mix/tasks/pandoc.ex

@@ -1,16 +1,38 @@
 defmodule Mix.Tasks.Pandoc do
   use Mix.Task
 
-  @out_dir "priv/static"
-
   @impl true
-  def run([profile | _args]) do
-    IO.puts "profile: #{profile}"
+  def run(args) do
+    switches = [runtime_config: :boolean]
+    {opts, remaining_args} = OptionParser.parse_head!(args, switches: switches)
 
-    "priv/posts"
+    if opts[:runtime_config] do
+      Mix.Task.run("app.config")
+    else
+      Mix.Task.run("loadpaths")
+      Application.ensure_all_started(:pandoc)
+    end
+
+    Mix.Task.reenable("pandoc")
+    install_and_run(remaining_args)
+  end
+
+  defp install_and_run([profile | args] = _all) do
+    IO.puts("mix task args #{inspect(args)}")
+
+    "documents"
     |> File.ls!()
     |> Enum.each(fn path ->
-      Pandoc.install_and_run(Path.join(["priv", "posts", path]))
+      all = [profile, path]
+
+      case Pandoc.run(String.to_atom(profile), [path]) do
+        0 -> :ok
+        status -> Mix.raise("`mix pandoc #{Enum.join(all, " ")}` exited with #{status}")
+      end
     end)
   end
+
+  defp install_and_run([]) do
+    Mix.raise("`mix pandoc` expects the profile as argument")
+  end
 end