Create table of contents if toc metadata key is set

pandoc_reader.py

@@ -65,6 +65,10 @@ class PandocReader(BaseReader):
         bib_header = self.settings.get('PANDOC_BIBHEADER', None)
 
         filters = self.settings.get('PANDOC_FILTERS', [])
+        extensions = self.settings.get('PANDOC_EXTENSIONS', '')
+        if isinstance(extensions, list):
+            extensions = ''.join(extensions)
+
         extra_args = self.settings.get('PANDOC_ARGS', [])
         extensions = self.settings.get('PANDOC_EXTENSIONS', '')
         if isinstance(extensions, list):
@@ -86,6 +90,10 @@ class PandocReader(BaseReader):
                     '--metadata=reference-section-title="{}"'.format(
                         bib_header)]
 
+        if "toc" in metadata.keys():
+            if metadata['toc'] == True:
+                pandoc_cmd.extend(['--toc'])
+
         proc = subprocess.Popen(
             pandoc_cmd,
             stdin=subprocess.PIPE,