sort directive: sort values of keys. Closes #208

CHANGELOG.md

@@ -4,6 +4,10 @@
 they can and will change without that change being reflected in Styler's semantic version.
 ## main
 
+### Improvements
+
+- `# styler:sort` can be used to sort values of key-value pairs. eg, sort the value of a single key in a map (Closes #208, h/t @ypconstante)
+
 ## 1.3.1
 
 ### Improvements

lib/style.ex

@@ -240,6 +240,7 @@ defmodule Styler.Style do
   def meta({_, meta, _}), do: meta
   # kwl tuple ala a: :b
   def meta({{_, meta, _}, _}), do: meta
+  def meta(_), do: nil
 
   @doc """
   Returns all comments "for" a node, including on the line before it.

lib/style/comment_directives.ex

@@ -27,9 +27,9 @@ defmodule Styler.Style.CommentDirectives do
       |> Enum.map(& &1.line)
       |> Enum.reduce({zipper, ctx.comments}, fn line, {zipper, comments} ->
         found =
-          Zipper.find(zipper, fn
-            {_, meta, _} -> Keyword.get(meta, :line, -1) >= line
-            _ -> false
+          Zipper.find(zipper, fn node ->
+            node_line = Style.meta(node)[:line] || -1
+            node_line >= line
           end)
 
         if found do
@@ -102,5 +102,10 @@ defmodule Styler.Style.CommentDirectives do
     {{:@, m, [{a, am, [assignment]}]}, comments}
   end
 
+  defp sort({key, value}, comments) do
+    {value, comments} = sort(value, comments)
+    {{key, value}, comments}
+  end
+
   defp sort(x, comments), do: {x, comments}
 end

test/style/comment_directives_test.exs

@@ -141,6 +141,55 @@ defmodule Styler.Style.CommentDirectivesTest do
       )
     end
 
+    test "inside keywords" do
+      assert_style(
+        """
+        %{
+          key:
+          # styler:sort
+          [
+            3,
+            2,
+            1
+          ]
+        }
+        """,
+        """
+        %{
+          # styler:sort
+          key: [
+            1,
+            2,
+            3
+          ]
+        }
+        """
+      )
+
+      assert_style(
+        """
+        %{
+          # styler:sort
+          key: [
+            3,
+            2,
+            1
+          ]
+        }
+        """,
+        """
+        %{
+          # styler:sort
+          key: [
+            1,
+            2,
+            3
+          ]
+        }
+        """
+      )
+    end
+
     test "sorts sigils" do
       assert_style("# styler:sort\n~w|c a b|", "# styler:sort\n~w|a b c|")