Include latest and searchNodes metadata into hosted docs

lib/elixir/scripts/docs_config.exs

@@ -4,7 +4,7 @@
 {text_tags, 0} = System.cmd("git", ["tag"])
 skipped = Version.parse!("1.0.3")
 
-list_contents =
+versions =
   for(
     "v" <> rest <- String.split(text_tags),
     not String.ends_with?(rest, "-latest"),
@@ -13,10 +13,33 @@ list_contents =
     do: version
   )
   |> Enum.sort({:desc, Version})
-  |> Enum.map_intersperse(", ", fn version ->
+
+latest =
+  versions
+  |> Stream.filter(&(&1.pre == []))
+  |> Enum.fetch!(0)
+  |> Version.to_string()
+
+version_nodes =
+  for version <- versions do
     version_string = Version.to_string(version)
-    ~s[{"version":"v#{version_string}", "url":"https://hexdocs.pm/#{app}/#{version_string}"}]
-  end)
+    map = %{version: "v#{version_string}", url: "https://hexdocs.pm/#{app}/#{version_string}"}
+
+    if version_string == latest do
+      Map.put(map, :latest, true)
+    else
+      map
+    end
+  end
+
+search_nodes =
+  for app <- ~w(eex elixir ex_unit iex logger mix)s do
+    %{name: app, version: latest}
+  end
 
 File.mkdir_p!("doc/#{app}")
-File.write!("doc/#{app}/docs_config.js", ["var versionNodes = [", list_contents, "];\n"])
+
+File.write!("doc/#{app}/docs_config.js", """
+var versionNodes = #{JSON.encode_to_iodata!(version_nodes)};
+var searchNodes = #{JSON.encode_to_iodata!(search_nodes)};
+""")