Allow empty summary

pandoc_reader.py

@@ -4,7 +4,7 @@ import subprocess
 from pelican import signals
 from pelican.readers import BaseReader
 from pelican.utils import pelican_open
-
+import os
 
 try:
     import yaml
@@ -40,6 +40,9 @@ class PandocReader(BaseReader):
                 name, value = k.lower(), parsed[k]
                 metadata[name] = self.process_metadata(name, value)
 
+            if (not 'summary' in metadata) or (metadata['summary'] is None):
+                metadata['summary'] = ''
+
             # Return the text entirely.
             content = "\n".join(text)
 
@@ -61,34 +64,51 @@ class PandocReader(BaseReader):
 
         metadata, content = self._get_meta_and_content(text)
 
+        filters = self.settings.get('PANDOC_FILTERS', [])
         extra_args = self.settings.get('PANDOC_ARGS', [])
         extensions = self.settings.get('PANDOC_EXTENSIONS', '')
         if isinstance(extensions, list):
             extensions = ''.join(extensions)
 
         pandoc_cmd = ["pandoc", "--from=markdown" + extensions, "--to=html5"]
+        for filt in filters:
+            pandoc_cmd.extend(["--filter", filt])
         pandoc_cmd.extend(extra_args)
 
+        bib_dir = self.settings.get('PANDOC_BIBDIR', '')
+        bib_header = self.settings.get('PANDOC_BIBHEADER', None)
         if "bibliography" in metadata.keys():
             bib_file = os.path.join(bib_dir, metadata['bibliography'])
-            extra_args = extra_args + ['--bibliography={}'.format(bib_file)]
+            if not os.path.exists(bib_file):
+                raise FileNotFoundError(bib_file)
+            bib_args = ['--bibliography={}'.format(bib_file)]
 
             if bib_header is not None:
-                extra_args = extra_args + [
+                bib_args = bib_args + [
                     '--metadata=reference-section-title="{}"'.format(
                         bib_header)]
+            pandoc_cmd.extend(bib_args)
 
-        proc = subprocess.Popen(pandoc_cmd,
-                                stdin=subprocess.PIPE,
-                                stdout=subprocess.PIPE)
+        if "toc" in metadata.keys():
+            if metadata['toc'] == True:
+                pandoc_cmd.extend(['--toc'])
 
-        output = proc.communicate(content.encode('utf-8'))[0].decode('utf-8')
+        proc = subprocess.Popen(
+            pandoc_cmd,
+            stdin=subprocess.PIPE,
+            stdout=subprocess.PIPE,
+            stderr=subprocess.PIPE)
+
+        output, err = proc.communicate(content.encode('utf-8'))
         status = proc.wait()
+        output, err = output.decode('utf-8'), err.decode('utf-8')
+        if status > 0:
+            logging.warning(output + err)
 
-        # Just in case, let's make sure we don't lose Pelican template
-        # parameters.
+        # Make sure we don't lose Pelican template parameters.
         output = output.replace('%7Battach%7D', '{attach}')\
                        .replace('%7Bfilename%7D', '{filename}')\
+                       .replace('%7Bstatic%7D', '{static}')\
                        .replace('%7Btag%7D', '{tag}')\
                        .replace('%7Bcategory%7D', '{category}')