Add draft link support to analyze.rb

Signed-off-by: Danila Fedorin <danila.fedorin@gmail.com>

analyze.rb

@@ -25,8 +25,9 @@ Dir['content/blog/**/*.md'].each do |file|
   file = file.chomp
   files << file
   arr = refs[file] || (refs[file] = [])
-  File.open(file).read.scan(/< relref "([^"]+)" >/) do |ref|
-    ref = resolve_path(File.dirname(file), ref[0])
+  pattern = Regexp.union(/< relref "([^"]+)" >/, /< draftlink "[^"]+" "([^"]+)" >/)
+  File.open(file).read.scan(pattern) do |ref|
+    ref = resolve_path(File.dirname(file), ref[0] || ref[1])
     arr << ref
     files << ref
   end