fix(posts,page): handle path based permalinks

Fixes path based permalinks when there are multiple source directories
configured

Author: mhanberg

lib/tableau/extensions/common.ex

@@ -46,7 +46,12 @@ defmodule Tableau.Extension.Common do
   def build_permalink(%{file: filename} = front_matter, config) do
     filename
     |> Path.rootname()
-    |> String.replace_prefix(config.dir, "")
+    |> then(fn rootname ->
+      for dir <- List.wrap(config.dir), reduce: rootname do
+        rootname ->
+          String.replace_prefix(rootname, dir, "")
+      end
+    end)
     |> transform_permalink(front_matter)
     |> then(&Map.put(front_matter, :permalink, &1))
   end

test/tableau/extensions/page_extension_test.exs

@@ -200,6 +200,9 @@ defmodule Tableau.PageExtensionTest do
     end
 
     test "generates permalink from file path if not configured or in front matter", %{tmp_dir: dir, token: token} do
+      assert {:ok, config} = PageExtension.config(%{dir: [dir], enabled: true})
+
+      token = put_in(token.extensions.pages.config, config)
       fancy_dir = Path.join(dir, "/some/fancy/path")
       File.mkdir_p!(fancy_dir)
 

test/tableau/extensions/post_extension_test.exs

@@ -266,6 +266,9 @@ defmodule Tableau.PostExtensionTest do
     end
 
     test "generates permalink from file path if not configured or in front matter", %{tmp_dir: dir, token: token} do
+      assert {:ok, config} = PostExtension.config(%{dir: [dir], enabled: true})
+
+      token = put_in(token.extensions.posts.config, config)
       fancy_dir = Path.join(dir, "/some/fancy/path")
       File.mkdir_p!(fancy_dir)