Extract index view to module.

_layout/Index.elm

@@ -0,0 +1,43 @@
+module Index exposing (view)
+
+import Element exposing (Element)
+import MarkParser
+
+
+view :
+    List
+        ( List String
+        , { body : List (Element msg)
+          , metadata : MarkParser.Metadata msg
+          }
+        )
+    -> Element msg
+view posts =
+    Element.column [ Element.spacing 20 ]
+        (posts
+            |> List.map postSummary
+        )
+
+
+postSummary :
+    ( List String
+    , { body : List (Element msg)
+      , metadata : MarkParser.Metadata msg
+      }
+    )
+    -> Element msg
+postSummary ( postPath, post ) =
+    Element.paragraph [] post.metadata.title
+        |> linkToPost postPath
+
+
+linkToPost : List String -> Element msg -> Element msg
+linkToPost postPath content =
+    Element.link []
+        { url = postUrl postPath, label = content }
+
+
+postUrl : List String -> String
+postUrl postPath =
+    "/"
+        ++ String.join "/" postPath

elm.json

@@ -2,6 +2,7 @@
     "type": "application",
     "source-directories": [
         "src",
+        "_layout",
         "gen"
     ],
     "elm-version": "0.19.0",
@@ -31,4 +32,4 @@
             "elm/random": "1.0.0"
         }
     }
-}
+}

gen/Content.elm

@@ -1,6 +1,7 @@
 module Content exposing (allData, pages, posts)
 
 import Element exposing (Element)
+import Index
 import Mark
 import Mark.Error
 import MarkParser
@@ -32,7 +33,16 @@ allData =
             let
                 pageListings =
                     pages
-                        |> List.map (\( path, markup ) -> ( path, Mark.compile (MarkParser.document Element.none) markup ))
+                        |> List.map
+                            (\( path, markup ) ->
+                                ( path
+                                , Mark.compile
+                                    (MarkParser.document
+                                        (Index.view postListings)
+                                    )
+                                    markup
+                                )
+                            )
                         |> change2
             in
             case pageListings of