Syntax coloration as before

Rules

@@ -57,6 +57,7 @@ compile '/html/*' do
   filter :yabbreviations
   filter :multicorps
   filter :firsthi
+  filter :ultraviolet
 
   layout 'default' unless item[:layout] == "none"
 end

config.yaml

@@ -4,6 +4,7 @@ data_sources:
   layouts_root: /
   type: filesystem_unified
 output_dir: output
+ultraviolet_theme: "twilight"
 
 # les langues
 languages:

lib/ultraviolet.rb

@@ -0,0 +1,43 @@
+class UltraVioletFilter < Nanoc3::Filter
+    identifier :ultraviolet
+    def run(content, params={})
+        require 'rio'
+        require 'rubygems'
+        require 'uv'
+        code_rule = %r{(<code class="(.+?)"( file="(.+?)")?>(.+?)</code>)}m
+        content.gsub!(code_rule) do |full|
+            # original, lang, filename, code = full[0], full[1], full[3], full[4]
+            original, lang, filename, code = $1, $2, $4, $5
+            if lang =~ /^(zsh|bash|sh|csh|shell)$/
+                lang='shell-unix-generic'
+            end
+            # Create a plaintext file version for download.
+            codeprefix=''
+            codesuffix=''
+            if filename
+                webpath = @item.path
+                code_path = [ 'output' , webpath, 'code']
+                url = webpath + 'code/' + filename
+                if (url == @url)
+                    puts %{erreur de redo : #{url}}
+                    break
+                end
+                @url=url
+                copy_text_to_file(code, filename, code_path)
+                codeprefix=%{<div class="file"><a href="#{url}"> &#x27A5; #{filename} </a></div><div class="withfile">\n}
+                codesuffix=%{\n</div>}
+            end
+            # Substitute the un-highlighted code with the highlighted code.
+            codeprefix+Uv.parse(code, "xhtml", lang, false, @config[:ultraviolet_theme])+codesuffix
+        end
+        content
+    end
+
+    private
+    def copy_text_to_file(str, fname, dir)
+        dest_rio = rio(dir).mkpath
+        frio = rio(dir, fname).delete
+        frio << str
+        puts "\t\twrote file #{dir}/#{fname}"
+    end
+end