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#!/usr/bin/python
# Simple script that will output the release where a given bug was fixed
# searching the NEWS file
import optparse
import re
import sys
class NewsParser(object):
paren_exp_re = re.compile('\(([^)]+)\)')
release_re = re.compile("bzr[ -]")
release_prefix_length = len('bzr ')
bugs_re = re.compile('#([0-9]+)')
def __init__(self, news):
self.news = news
# Temporary attributes used by the parser
self.release = None
self.date = None
self.may_be_release = None
self.release_markup = None
self.entry = ''
self.line = None
self.lrs = None
def set_line(self, line):
self.line = line
self.lrs = line.rstrip()
def try_release(self):
if self.release_re.match(self.lrs) is not None:
# May be a new release
self.may_be_release = self.lrs
# We know the markup will have the same length as the release
self.release_markup = '#' * len(self.may_be_release)
return True
return False
def confirm_release(self):
if self.may_be_release is not None and self.lrs == self.release_markup:
# The release is followed by the right markup
self.release = self.may_be_release[self.release_prefix_length:]
# Wait for the associated date
self.date = None
return True
return False
def try_date(self):
if self.release is None:
return False
date_re = re.compile(':%s: (NOT RELEASED YET|\d{4}-\d{2}-\d{2})'
% (self.release,))
match = date_re.match(self.lrs)
if match is not None:
self.date = match.group(1)
return True
# The old fashion way
released_re = re.compile(':Released:\s+(\d{4}-\d{2}-\d{2})')
match = released_re.match(self.lrs)
if match is not None:
self.date = match.group(1)
return True
return False
def add_line_to_entry(self):
if self.lrs == '':
return False
self.entry += self.line
return True
def extract_bugs_from_entry(self):
"""Possibly extract bugs from a NEWS entry and yield them.
Not all entries will contain bugs and some entries are even garbage and
we don't try to parse them (yet). The trigger is a '#' and what looks
like a bug number inside parens to start with. From that we extract
authors (when present) and multiple bugs if needed.
"""
# FIXME: Malone entries are different
# Join all entry lines to simplify multiple line matching
flat_entry = ' '.join(self.entry.splitlines())
# Fixed bugs are always inside parens
for par in self.paren_exp_re.findall(flat_entry):
sharp = par.find('#')
if sharp is not None:
# We have at least one bug inside parens.
bugs = list(self.bugs_re.finditer(par))
if bugs:
# See where the first bug is mentioned
start = bugs[0].start()
end = bugs[-1].end()
if start == 0:
# (bugs/authors)
authors = par[end:]
else:
# (authors/bugs)
authors = par[:start]
for bug_match in bugs:
bug_number = bug_match.group(0)
yield (bug_number, authors,
self.release, self.date, self.entry)
# We've consumed the entry
self.entry = ''
def parse_bugs(self):
for line in self.news:
self.set_line(line)
if self.try_release():
continue # line may a be release
try:
if self.confirm_release():
continue # previous line was indeed a release
finally:
self.may_be_release = None
if self.try_date():
continue # The release date has been seen
if self.add_line_to_entry():
continue # accumulate in self.enrty
for b in self.extract_bugs_from_entry():
yield b # all bugs in the news entry
def main():
opt_parser = optparse.OptionParser(
usage="""Usage: %prog [options] BUG_NUMBER
""")
opt_parser.add_option(
'-f', '--file', type='str', dest='news_file',
help='NEWS file (defaults to ./NEWS)')
opt_parser.add_option(
'-m', '--message', type='str', dest='msg_re',
help='A regexp to search for in the news entry '
'(BUG_NUMBER should not be specified in this case)')
opt_parser.set_defaults(news_file='./NEWS')
(opts, args) = opt_parser.parse_args(sys.argv[1:])
if opts.msg_re is not None:
if len(args) != 0:
opt_parser.error('BUG_NUMBER and -m are mutually exclusive')
bug = None
msg_re = re.compile(opts.msg_re)
elif len(args) != 1:
opt_parser.error('Expected a single bug number, got %r' % args)
else:
bug = args[0]
news = open(opts.news_file)
parser = NewsParser(news)
try:
seen = 0
for b in parser.parse_bugs():
(number, authors, release, date, entry,) = b
# indent entry
entry = '\n'.join([' ' + l for l in entry.splitlines()])
found = False
if bug is not None:
if number[1:] == bug: # Strip the leading '#'
found = True
elif msg_re.search(entry) is not None:
found = True
if found:
print 'Bug %s was fixed in bzr-%s/%s by %s:' % (
number, release, date, authors)
print entry
seen += 1
finally:
print '%s bugs seen' % (seen,)
news.close()
main()
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