parse_traceback.py

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import string

_url = 'http://www.zopezen.org/Source'
_sample = '''
<!--
Traceback (innermost last):
  File E:\Zope23\lib\python\ZPublisher\Publish.py, line 223, in publish_module
  File E:\Zope23\lib\python\ZPublisher\Publish.py, line 187, in publish
  File E:\Zope23\lib\python\Zope\__init__.py, line 221, in zpublisher_exception_hook
    (Object: Traversable)
  File E:\Zope23\lib\python\ZPublisher\Publish.py, line 171, in publish
  File E:\Zope23\lib\python\ZPublisher\mapply.py, line 160, in mapply
    (Object: search_html)
  File E:\Zope23\lib\python\ZPublisher\Publish.py, line 112, in call_object
    (Object: search_html)
  File E:\Zope23\lib\python\OFS\DTMLMethod.py, line 189, in __call__
    (Object: search_html)
  File E:\Zope23\lib\python\DocumentTemplate\DT_String.py, line 538, in __call__
    (Object: search_html)
  File E:\Zope23\lib\python\Products\ZDebug\DTMLDebug.py, line 307, in debug_render_blocks
  File E:\Zope23\lib\python\Products\ZDebug\DTMLDebug.py, line 228, in debugException
    (Object: renderwob)
  File E:\Zope23\lib\python\Products\ZDebug\DTMLDebug.py, line 305, in debug_render_blocks
  File E:\Zope23\lib\python\DocumentTemplate\DT_In.py, line 649, in renderwob
    (Object: catalog({'title':PrincipiaSearchSource,}))
  File E:\Zope23\lib\python\DocumentTemplate\DT_Util.py, line 334, in eval
    (Object: catalog({'title':PrincipiaSearchSource,}))
    (Info: PrincipiaSearchSource)
  File &lt;string&gt;, line 0, in ?
NameError: (see above)

-->
'''

def parse_tb(tb):
    in_lines = string.split(tb, '\n')
    out_lines = []
    for line in in_lines:
        if string.find(line, 'File') >= 0 and string.find(line, 'in ?') < 0:
            out_lines.append(parse_line(line))
        else:
            out_lines.append(line)
    tb = string.join(out_lines, '\n')
    tb = nuke_html(tb)
    return tb

def parse_line(line):
    words = string.split(line, ' ')
    url = parse_into_url(words[3][:-1], words[5][:-1])
    html = ' [<a href="%s">Source</a>]' % url
    line = line + html
    return line

def parse_into_url(file, line_no):
    url = string.replace(file, INSTANCE_HOME, _url)
    url = string.replace(url, '\\', '/')
    last = string.rindex(url, '/')
    url = url[:last+1] + '~' + url[last+1:]
    url = '%s#%s' % (url, line_no)
    return url

def nuke_html(tb):
    h = string.find(tb, '<HTML>')
    if  h > 0:
        tb = tb[:h]
    return tb

if __name__=='__main__':
    print parse_tb(_sample)