Allow creating slugs for emoji characters.

docs/configuration.md

@@ -25,6 +25,7 @@ jekyll-archives:
 #### Optional settings
 - [Default layout (`layout`)](#default-layout)
 - [Permalinks (`permalinks`)](#permalinks)
+- [Slug configuration (`slug_mode`)](#slug-configuration)
 
 ---
 
@@ -121,3 +122,15 @@ permalinks:
   month: '/archives/month/:year-:month/'
   tag: '/archives/tag/:name/'
 ```
+
+#### Slug Configuration
+
+Archives of tags and categories are by default generated by *slugifying* the tag or category name.
+You can configure the result of this process by setting the `slug_mode` key to any of the
+[modes expected by Jekyll](https://jekyllrb.com/docs/liquid/filters/#options-for-the-slugify-filter)
+
+##### Sample values
+
+```yml
+slug_mode: latin
+```

lib/jekyll-archives/archive.rb

@@ -30,10 +30,7 @@ def initialize(site, title, type, posts)
         @type   = type
         @title  = title
         @config = site.config["jekyll-archives"]
-
-        # Generate slug if tag or category
-        # (taken from jekyll/jekyll/features/support/env.rb)
-        @slug = Utils.slugify(title) if title.is_a? String
+        @slug   = slugify_string_title
 
         # Use ".html" for file extension and url for path
         @ext  = File.extname(relative_path)
@@ -122,6 +119,18 @@ def relative_path
       def inspect
         "#<Jekyll:Archive @type=#{@type} @title=#{@title} @data=#{@data.inspect}>"
       end
+
+      private
+
+      # Generate slug if @title attribute is a string.
+      #
+      # Note: mode other than those expected by Jekyll returns the given string after
+      # downcasing it.
+      def slugify_string_title
+        return unless title.is_a?(String)
+
+        Utils.slugify(title, :mode => @config["slug_mode"])
+      end
     end
   end
 end

test/source/_posts/2018-11-05-pretty-slugs.md

@@ -0,0 +1,6 @@
+---
+title: Pretty Slugs
+category: 💎
+---
+
+Post with 💎 category.

test/test_jekyll_archives.rb

@@ -48,6 +48,24 @@ class TestJekyllArchives < Minitest::Test
     end
   end
 
+  context "the jekyll-archives plugin with a custom slug mode" do
+    setup do
+      # slug mode other than those expected by Jekyll returns the given string after
+      # downcasing it.
+      @site = fixture_site("jekyll-archives" => {
+        "slug_mode" => "raw",
+        "enabled"   => true,
+      })
+      @site.read
+      @archives = Jekyll::Archives::Archives.new(@site.config)
+    end
+
+    should "generate slugs using the mode specified" do
+      @archives.generate(@site)
+      assert archive_exists? @site, "category/💎/index.html"
+    end
+  end
+
   context "the jekyll-archives plugin with custom layout path" do
     setup do
       @site = fixture_site("jekyll-archives" => {
@@ -116,7 +134,7 @@ class TestJekyllArchives < Minitest::Test
     end
 
     should "populate the {{ site.archives }} tag in Liquid" do
-      assert_equal 12, read_file("length.html").to_i
+      assert_equal 16, read_file("length.html").to_i
     end
   end