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116 lines
3.5 KiB
Python
Executable File
116 lines
3.5 KiB
Python
Executable File
#!/usr/bin/env python
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"""Generate the errorcodes module starting from PostgreSQL documentation.
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The script can be run at a new PostgreSQL release to refresh the module.
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"""
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# Copyright (C) 2010 Daniele Varrazzo <daniele.varrazzo@gmail.com>
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by the
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# Free Software Foundation; either version 2, or (at your option) any later
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# version.
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#
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# This program is distributed in the hope that it will be useful, but
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# WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTIBILITY
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# or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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# for more details.
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import sys
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import urllib2
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from collections import defaultdict
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from BeautifulSoup import BeautifulSoup as BS
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def main():
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if len(sys.argv) != 2:
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print >>sys.stderr, "usage: %s /path/to/errorcodes.py" % sys.argv[0]
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return 2
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filename = sys.argv[1]
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file_start = read_base_file(filename)
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classes, errors = fetch_errors(['8.1', '8.2', '8.3', '8.4', '9.0'])
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f = open(filename, "w")
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for line in file_start:
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print >>f, line
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for line in generate_module_data(classes, errors):
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print >>f, line
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def read_base_file(filename):
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rv = []
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for line in open(filename):
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rv.append(line.rstrip("\n"))
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if line.startswith("# autogenerated"):
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return rv
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raise ValueError("can't find the separator. Is this the right file?")
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def parse_errors(url):
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page = urllib2.urlopen(url).read()
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page = page.replace( # make things easier
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'<SPAN CLASS="PRODUCTNAME">PostgreSQL</SPAN>',
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'PostgreSQL')
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page = BS(page)
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table = page('table')[1]('tbody')[0]
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classes = {}
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errors = defaultdict(dict)
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for tr in table('tr'):
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if tr.td.get('colspan'): # it's a class
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label = tr.b.string.encode("ascii")
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assert label.startswith('Class')
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label = label.replace("—", "-")
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class_ = label.split()[1]
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assert len(class_) == 2
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classes[class_] = label
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else: # it's an error
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errcode = tr.tt.string.encode("ascii")
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assert len(errcode) == 5
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errlabel = tr('td')[1].string.replace(" ", "_").encode("ascii")
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# double check the columns are equal
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cond_name = tr('td')[2].string.upper().encode("ascii")
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assert errlabel == cond_name, tr
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errors[class_][errcode] = errlabel
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return classes, errors
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errors_url="http://www.postgresql.org/docs/%s/static/errcodes-appendix.html"
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def fetch_errors(versions):
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classes = {}
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errors = defaultdict(dict)
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for version in versions:
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c1, e1 = parse_errors(errors_url % version)
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classes.update(c1)
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for c, cerrs in e1.iteritems():
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errors[c].update(cerrs)
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return classes, errors
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def generate_module_data(classes, errors):
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yield ""
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yield "# Error classes"
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for clscode, clslabel in sorted(classes.items()):
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err = clslabel.split(" - ")[1].split("(")[0] \
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.strip().replace(" ", "_").replace('/', "_").upper()
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yield "CLASS_%s = %r" % (err, clscode)
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for clscode, clslabel in sorted(classes.items()):
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yield ""
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yield "# %s" % clslabel
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for errcode, errlabel in sorted(errors[clscode].items()):
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yield "%s = %r" % (errlabel, errcode)
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if __name__ == '__main__':
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sys.exit(main())
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