Не генерировать PDF, если источник не обновлён

asciidoctor.py

@@ -17,6 +17,7 @@ from pelican.readers import BaseReader
 from pelican.generators import Generator
 from pelican import signals
 import os
+import os.path
 import re
 import subprocess
 import sys
@@ -139,11 +140,12 @@ class AsciiDoctorPdfGenerator(Generator):
         filename = "{id_file}.pdf".format(id_file=content.slug)
         filepath = os.path.join(output_dir, filename)
 
+        if ((not os.path.isfile(filepath)) or
+            (os.path.getmtime(filepath) < os.path.getmtime(content.source_path))):
             check_call([cmd] + self.settings.get('ASCIIDOCTOR_EXTRA_OPTIONS', []) +
                        ['--require', 'asciidoctor-pdf', '--backend', 'pdf'] +
                        ['--doctype=article'] +
                        ['--out-file', filepath, content.source_path])
-
             logger.info("[ok] writing {filepath}".format(filepath=filepath))
 
     def generate_output(self, writer=None):