bib2html.py: Make use of date field

diff --git a/bib2html.py b/bib2html.py
index 5d5b4db16f6e75bbd796858d792714130052a614..a595f420b9679ec6efb1107ed4af8ec182a0ab64 100755 (executable)
--- a/bib2html.py
+++ b/bib2html.py
@@ -32,6 +32,7 @@ __license__ = "MIT"
 
 
 import os, sys, getopt, re
+import dateutil.parser
 
 
 def format_latex(text):
@@ -159,6 +160,9 @@ def format_entry(entry):
 def entryDateSortKey(p):
     k, e = p
 
+    if 'date' in e.fields:
+        return e.fields['date']
+
     month2num = { 'jan' : '01', 'feb' : '02', 'mar' : '03', \
             'apr' : '04', 'may' : '05', 'jun' : '06', \
             'jul' : '07', 'aug' : '08', 'sep' : '09', \
@@ -176,6 +180,17 @@ def entryDateSortKey(p):
     return e.fields['year'] + "-" + month
 
 
+def entryGetYear(e):
+    if 'year' in e.fields:
+        return e.fields['year']
+
+    if 'date' in e.fields:
+        dt = dateutil.parser.isoparse(e.fields['date'])
+        return str(dt.year)
+
+    return None
+
+
 def usage():
     """Print usage text of this program"""
 
@@ -222,7 +237,7 @@ if __name__ == "__main__":
     bib_data = parser.parse_file(bibfile)
     entries = bib_data.entries
 
-    years = list(set([ b.fields['year'] for b in entries.values() ]))
+    years = list(set([entryGetYear(e) for e in entries.values()]))
     years.sort(reverse=True)
 
     for year in years:
@@ -233,7 +248,7 @@ if __name__ == "__main__":
         iteritems.sort(key=entryDateSortKey, reverse=True)
         for key, entry in iteritems:
 
-            if entry.fields['year'] != year:
+            if entryGetYear(entry) != year:
                 continue
 
             print("<div class=bibentry>")