extend link_to helper to accept blocks (#632)

bridgetown-core/lib/bridgetown-core/helpers.rb

@@ -97,7 +97,13 @@ def find_relative_url_for_path(relative_path)
       # @param options [Hash] key-value pairs of HTML attributes to add to the tag
       # @return [String] the anchor tag HTML
       # @raise [ArgumentError] if the file cannot be found
-      def link_to(text, relative_path, options = {})
+      def link_to(text, relative_path = nil, options = {})
+        if block_given?
+          relative_path = text
+          text = yield
+        elsif relative_path.nil?
+          raise ArgumentError, "You must provide a relative path"
+        end
         segments = attributes_from_options({ href: url_for(relative_path) }.merge(options))
 
         safe("<a #{segments}>#{text}</a>")

bridgetown-core/test/test_ruby_helpers.rb

@@ -36,6 +36,16 @@ def setup
     should "accept hash attributes" do
       assert_equal "<a href=\"/foo/bar\" class=\"classes\" data-controller=\"test\" data-action=\"test#test\">Label</a>", @helpers.link_to("Label", "/foo/bar", class: "classes", data: { controller: "test", action: "test#test" })
     end
+
+    should "accept block syntax" do
+      assert_equal "<a href=\"/foo/bar\">Label</a>", @helpers.link_to("/foo/bar") { "Label" }
+    end
+
+    should "raise if only one argument was given" do
+      assert_raises ArgumentError do
+        @helpers.link_to("Label")
+      end
+    end
   end
 
   context "attributes_from_options" do