new_contents: #!/usr/bin/env python
  """
  Pandoc filter to convert svg files to pdf as suggested at:
  https://github.com/jgm/pandoc/issues/265#issuecomment-27317316
  """
  
  __author__ = "Jerome Robert"
  
  import mimetypes
  import subprocess
  import os
  import sys
  from pandocfilters import toJSONFilter, Image
  
  fmt_to_option = {
      "sile": ("--export-pdf","pdf"),
      "docx": ("--export-png", "png"),
  }
  
  def svg_to_any(key, value, fmt, meta):
      if key == 'Image':
         if len(value) == 2:
             # before pandoc 1.16
             alt, [src, title] = value
             attrs = None
         else:
             attrs, alt, [src, title] = value
         mimet,_ = mimetypes.guess_type(src)
         option = fmt_to_option.get(fmt)
         if mimet == 'image/svg+xml' and option:
             base_name,_ = os.path.splitext(src)
             eps_name = base_name + "." + option[1]
             try:
                 mtime = os.path.getmtime(eps_name)
             except OSError:
                 mtime = -1
             if mtime < os.path.getmtime(src):
                 cmd_line = ['inkscape', option[0], eps_name, src]
                 sys.stderr.write("Running %s\n" % " ".join(cmd_line))
                 subprocess.call(cmd_line, stdout=sys.stderr.fileno())
             if attrs:
                 return Image(attrs, alt, [eps_name, title])
             else:
                 return Image(alt, [eps_name, title])
  
  if __name__ == "__main__":
    toJSONFilter(svg_to_any)
  
subject: Add Pandoc filter to convert SVG illustrations to PDF