Fix #4191: Reduce Document#post_read complexity slightly.

lib/jekyll/document.rb

@@ -289,26 +289,23 @@ module Jekyll
     end
 
     def post_read
-      if DATE_FILENAME_MATCHER =~ relative_path
-        _, _, date, slug, ext = *relative_path.match(DATE_FILENAME_MATCHER)
-        merge_data!({
-          "slug" => slug,
-          "ext"  => ext
-        }, source: "filename")
-        data['title'] ||= slug.split('-').select(&:capitalize).join(' ')
-        if data['date'].nil? || data['date'].to_i == site.time.to_i
+      if relative_path =~ DATE_FILENAME_MATCHER
+        _, date, slug, ext = $1, $2, $3, $4
+        if !data['date'] || data['date'].to_i == site.time.to_i
           merge_data!({"date" => date}, source: "filename")
         end
-      elsif DATELESS_FILENAME_MATCHER =~ relative_path
-        m, cats, slug, ext = *relative_path.match(DATELESS_FILENAME_MATCHER)
-        data['title'] ||= slug.split('-').select {|w| w.capitalize! || w }.join(' ')
+      elsif relative_path =~ DATELESS_FILENAME_MATCHER
+        _, slug, ext = $1, $2, $3
       end
+
+      merge_data!({"slug" => slug, "ext" => ext}, source: "filename")
+
+      # Try to ensure the user gets a title.
+      data["title"] ||= Utils.titleize_slug(slug)
+
       populate_categories
       populate_tags
-
-      if generate_excerpt?
-        data['excerpt'] ||= Jekyll::Excerpt.new(self)
-      end
+      generate_excerpt
     end
 
     # Add superdirectories of the special_dir to categories.
@@ -445,5 +442,12 @@ module Jekyll
         super
       end
     end
+
+    private # :nodoc:
+    def generate_excerpt
+      if generate_excerpt?
+        data["excerpt"] ||= Jekyll::Excerpt.new(self)
+      end
+    end
   end
 end

lib/jekyll/utils.rb

@@ -10,8 +10,12 @@ module Jekyll
     SLUGIFY_DEFAULT_REGEXP = Regexp.new('[^[:alnum:]]+').freeze
     SLUGIFY_PRETTY_REGEXP = Regexp.new("[^[:alnum:]._~!$&'()+,;=@]+").freeze
 
-    def strip_heredoc(str)
-      str.gsub(/^[ \t]{#{(str.scan(/^[ \t]*(?=\S)/).min || "").size}}/, "")
+    # Takes a slug and turns it into a simple title.
+
+    def titleize_slug(slug)
+      slug.split("-").map! do |val|
+        val.capitalize!
+      end.join(" ")
     end
 
     # Non-destructive version of deep_merge_hashes! See that method.