cpython/Tools/faqwiz/faqwiz.py

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"""Generic FAQ Wizard.
This is a CGI program that maintains a user-editable FAQ. It uses RCS
to keep track of changes to individual FAQ entries. It is fully
configurable; everything you might want to change when using this
program to maintain some other FAQ than the Python FAQ is contained in
the configuration module, faqconf.py.
Note that this is not an executable script; it's an importable module.
The actual script to place in cgi-bin is faqw.py.
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"""
import sys, string, time, os, stat, re, cgi, faqconf
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from faqconf import * # This imports all uppercase names
now = time.time()
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class FileError:
def __init__(self, file):
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self.file = file
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class InvalidFile(FileError):
pass
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class NoSuchSection(FileError):
def __init__(self, section):
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FileError.__init__(self, NEWFILENAME %(section, 1))
self.section = section
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class NoSuchFile(FileError):
def __init__(self, file, why=None):
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FileError.__init__(self, file)
self.why = why
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def escape(s):
s = string.replace(s, '&', '&')
s = string.replace(s, '<', '&lt;')
s = string.replace(s, '>', '&gt;')
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return s
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def escapeq(s):
s = escape(s)
s = string.replace(s, '"', '&quot;')
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return s
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def _interpolate(format, args, kw):
try:
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quote = kw['_quote']
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except KeyError:
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quote = 1
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d = (kw,) + args + (faqconf.__dict__,)
m = MagicDict(d, quote)
return format % m
def interpolate(format, *args, **kw):
return _interpolate(format, args, kw)
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def emit(format, *args, **kw):
try:
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f = kw['_file']
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except KeyError:
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f = sys.stdout
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f.write(_interpolate(format, args, kw))
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translate_prog = None
def translate(text, pre=0):
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global translate_prog
if not translate_prog:
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translate_prog = prog = re.compile(
r'\b(http|ftp|https)://\S+(\b|/)|\b[-.\w]+@[-.\w]+')
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else:
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prog = translate_prog
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i = 0
list = []
while 1:
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m = prog.search(text, i)
if not m:
break
j = m.start()
list.append(escape(text[i:j]))
i = j
url = m.group(0)
while url[-1] in '();:,.?\'"<>':
url = url[:-1]
i = i + len(url)
url = escape(url)
if not pre or (pre and PROCESS_PREFORMAT):
if ':' in url:
repl = '<A HREF="%s">%s</A>' % (url, url)
else:
repl = '<A HREF="mailto:%s">%s</A>' % (url, url)
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else:
repl = url
list.append(repl)
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j = len(text)
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list.append(escape(text[i:j]))
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return string.join(list, '')
def emphasize(line):
return re.sub(r'\*([a-zA-Z]+)\*', r'<I>\1</I>', line)
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revparse_prog = None
def revparse(rev):
global revparse_prog
if not revparse_prog:
revparse_prog = re.compile(r'^(\d{1,3})\.(\d{1,4})$')
m = revparse_prog.match(rev)
if not m:
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return None
[major, minor] = map(string.atoi, m.group(1, 2))
return major, minor
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def load_cookies():
if not os.environ.has_key('HTTP_COOKIE'):
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return {}
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raw = os.environ['HTTP_COOKIE']
words = map(string.strip, string.split(raw, ';'))
cookies = {}
for word in words:
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i = string.find(word, '=')
if i >= 0:
key, value = word[:i], word[i+1:]
cookies[key] = value
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return cookies
def load_my_cookie():
cookies = load_cookies()
try:
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value = cookies[COOKIE_NAME]
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except KeyError:
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return {}
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import urllib
value = urllib.unquote(value)
words = string.split(value, '/')
while len(words) < 3:
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words.append('')
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author = string.join(words[:-2], '/')
email = words[-2]
password = words[-1]
return {'author': author,
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'email': email,
'password': password}
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def send_my_cookie(ui):
name = COOKIE_NAME
value = "%s/%s/%s" % (ui.author, ui.email, ui.password)
import urllib
value = urllib.quote(value)
then = now + COOKIE_LIFETIME
gmt = time.gmtime(then)
print "Set-Cookie: %s=%s; path=/cgi-bin/;" % (name, value),
print time.strftime("expires=%a, %d-%b-%y %X GMT", gmt)
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class MagicDict:
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def __init__(self, d, quote):
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self.__d = d
self.__quote = quote
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def __getitem__(self, key):
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for d in self.__d:
try:
value = d[key]
if value:
value = str(value)
if self.__quote:
value = escapeq(value)
return value
except KeyError:
pass
return ''
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class UserInput:
def __init__(self):
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self.__form = cgi.FieldStorage()
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def __getattr__(self, name):
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if name[0] == '_':
raise AttributeError
try:
value = self.__form[name].value
except (TypeError, KeyError):
value = ''
else:
value = string.strip(value)
setattr(self, name, value)
return value
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def __getitem__(self, key):
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return getattr(self, key)
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class FaqEntry:
def __init__(self, fp, file, sec_num):
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self.file = file
self.sec, self.num = sec_num
if fp:
import rfc822
self.__headers = rfc822.Message(fp)
self.body = string.strip(fp.read())
else:
self.__headers = {'title': "%d.%d. " % sec_num}
self.body = ''
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def __getattr__(self, name):
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if name[0] == '_':
raise AttributeError
key = string.join(string.split(name, '_'), '-')
try:
value = self.__headers[key]
except KeyError:
value = ''
setattr(self, name, value)
return value
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def __getitem__(self, key):
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return getattr(self, key)
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def load_version(self):
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command = interpolate(SH_RLOG_H, self)
p = os.popen(command)
version = ''
while 1:
line = p.readline()
if not line:
break
if line[:5] == 'head:':
version = string.strip(line[5:])
p.close()
self.version = version
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def getmtime(self):
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if not self.last_changed_date:
return 0
try:
return os.stat(self.file)[stat.ST_MTIME]
except os.error:
return 0
def emit_marks(self):
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mtime = self.getmtime()
if mtime >= now - DT_VERY_RECENT:
emit(MARK_VERY_RECENT, self)
elif mtime >= now - DT_RECENT:
emit(MARK_RECENT, self)
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def show(self, edit=1):
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emit(ENTRY_HEADER1, self)
self.emit_marks()
emit(ENTRY_HEADER2, self)
pre = 0
raw = 0
for line in string.split(self.body, '\n'):
# Allow the user to insert raw html into a FAQ answer
# (Skip Montanaro, with changes by Guido)
tag = string.lower(string.rstrip(line))
if tag == '<html>':
raw = 1
continue
if tag == '</html>':
raw = 0
continue
if raw:
print line
continue
if not string.strip(line):
if pre:
print '</PRE>'
pre = 0
else:
print '<P>'
else:
if line[0] not in string.whitespace:
if pre:
print '</PRE>'
pre = 0
else:
if not pre:
print '<PRE>'
pre = 1
if '/' in line or '@' in line:
line = translate(line, pre)
elif '<' in line or '&' in line:
line = escape(line)
if not pre and '*' in line:
line = emphasize(line)
print line
if pre:
print '</PRE>'
pre = 0
if edit:
print '<P>'
emit(ENTRY_FOOTER, self)
if self.last_changed_date:
emit(ENTRY_LOGINFO, self)
print '<P>'
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class FaqDir:
entryclass = FaqEntry
__okprog = re.compile(OKFILENAME)
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def __init__(self, dir=os.curdir):
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self.__dir = dir
self.__files = None
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def __fill(self):
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if self.__files is not None:
return
self.__files = files = []
okprog = self.__okprog
for file in os.listdir(self.__dir):
if self.__okprog.match(file):
files.append(file)
files.sort()
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def good(self, file):
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return self.__okprog.match(file)
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def parse(self, file):
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m = self.good(file)
if not m:
return None
sec, num = m.group(1, 2)
return string.atoi(sec), string.atoi(num)
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def list(self):
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# XXX Caller shouldn't modify result
self.__fill()
return self.__files
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def open(self, file):
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sec_num = self.parse(file)
if not sec_num:
raise InvalidFile(file)
try:
fp = open(file)
except IOError, msg:
raise NoSuchFile(file, msg)
try:
return self.entryclass(fp, file, sec_num)
finally:
fp.close()
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def show(self, file, edit=1):
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self.open(file).show(edit=edit)
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def new(self, section):
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if not SECTION_TITLES.has_key(section):
raise NoSuchSection(section)
maxnum = 0
for file in self.list():
sec, num = self.parse(file)
if sec == section:
maxnum = max(maxnum, num)
sec_num = (section, maxnum+1)
file = NEWFILENAME % sec_num
return self.entryclass(None, file, sec_num)
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class FaqWizard:
def __init__(self):
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self.ui = UserInput()
self.dir = FaqDir()
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def go(self):
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print 'Content-type: text/html'
req = self.ui.req or 'home'
mname = 'do_%s' % req
try:
meth = getattr(self, mname)
except AttributeError:
self.error("Bad request type %s." % `req`)
else:
try:
meth()
except InvalidFile, exc:
self.error("Invalid entry file name %s" % exc.file)
except NoSuchFile, exc:
self.error("No entry with file name %s" % exc.file)
except NoSuchSection, exc:
self.error("No section number %s" % exc.section)
self.epilogue()
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def error(self, message, **kw):
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self.prologue(T_ERROR)
emit(message, kw)
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def prologue(self, title, entry=None, **kw):
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emit(PROLOGUE, entry, kwdict=kw, title=escape(title))
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def epilogue(self):
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emit(EPILOGUE)
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def do_home(self):
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self.prologue(T_HOME)
emit(HOME)
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def do_debug(self):
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self.prologue("FAQ Wizard Debugging")
form = cgi.FieldStorage()
cgi.print_form(form)
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cgi.print_environ(os.environ)
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cgi.print_directory()
cgi.print_arguments()
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def do_search(self):
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query = self.ui.query
if not query:
self.error("Empty query string!")
return
if self.ui.querytype == 'simple':
query = re.escape(query)
queries = [query]
elif self.ui.querytype in ('anykeywords', 'allkeywords'):
words = filter(None, re.split('\W+', query))
if not words:
self.error("No keywords specified!")
return
words = map(lambda w: r'\b%s\b' % w, words)
if self.ui.querytype[:3] == 'any':
queries = [string.join(words, '|')]
else:
# Each of the individual queries must match
queries = words
else:
# Default to regular expression
queries = [query]
self.prologue(T_SEARCH)
progs = []
for query in queries:
if self.ui.casefold == 'no':
p = re.compile(query)
else:
p = re.compile(query, re.IGNORECASE)
progs.append(p)
hits = []
for file in self.dir.list():
try:
entry = self.dir.open(file)
except FileError:
constants
for p in progs:
if not p.search(entry.title) and not p.search(entry.body):
break
else:
hits.append(file)
if not hits:
emit(NO_HITS, self.ui, count=0)
elif len(hits) <= MAXHITS:
if len(hits) == 1:
emit(ONE_HIT, count=1)
else:
emit(FEW_HITS, count=len(hits))
self.format_all(hits, headers=0)
else:
emit(MANY_HITS, count=len(hits))
self.format_index(hits)
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def do_all(self):
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self.prologue(T_ALL)
files = self.dir.list()
self.last_changed(files)
self.format_index(files, localrefs=1)
self.format_all(files)
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def do_compat(self):
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files = self.dir.list()
emit(COMPAT)
self.last_changed(files)
self.format_index(files, localrefs=1)
self.format_all(files, edit=0)
sys.exit(0) # XXX Hack to suppress epilogue
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def last_changed(self, files):
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latest = 0
for file in files:
entry = self.dir.open(file)
if entry:
mtime = mtime = entry.getmtime()
if mtime > latest:
latest = mtime
print time.strftime(LAST_CHANGED, time.localtime(latest))
emit(EXPLAIN_MARKS)
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def format_all(self, files, edit=1, headers=1):
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sec = 0
for file in files:
try:
entry = self.dir.open(file)
except NoSuchFile:
continue
if headers and entry.sec != sec:
sec = entry.sec
try:
title = SECTION_TITLES[sec]
except KeyError:
title = "Untitled"
emit("\n<HR>\n<H1>%(sec)s. %(title)s</H1>\n",
sec=sec, title=title)
entry.show(edit=edit)
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def do_index(self):
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self.prologue(T_INDEX)
files = self.dir.list()
self.last_changed(files)
self.format_index(files, add=1)
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def format_index(self, files, add=0, localrefs=0):
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sec = 0
for file in files:
try:
entry = self.dir.open(file)
except NoSuchFile:
continue
if entry.sec != sec:
if sec:
if add:
emit(INDEX_ADDSECTION, sec=sec)
emit(INDEX_ENDSECTION, sec=sec)
sec = entry.sec
try:
title = SECTION_TITLES[sec]
except KeyError:
title = "Untitled"
emit(INDEX_SECTION, sec=sec, title=title)
if localrefs:
emit(LOCAL_ENTRY, entry)
else:
emit(INDEX_ENTRY, entry)
entry.emit_marks()
if sec:
if add:
emit(INDEX_ADDSECTION, sec=sec)
emit(INDEX_ENDSECTION, sec=sec)
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def do_recent(self):
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if not self.ui.days:
days = 1
else:
days = string.atof(self.ui.days)
try:
cutoff = now - days * 24 * 3600
except OverflowError:
cutoff = 0
list = []
for file in self.dir.list():
entry = self.dir.open(file)
if not entry:
continue
mtime = entry.getmtime()
if mtime >= cutoff:
list.append((mtime, file))
list.sort()
list.reverse()
self.prologue(T_RECENT)
if days <= 1:
period = "%.2g hours" % (days*24)
else:
period = "%.6g days" % days
if not list:
emit(NO_RECENT, period=period)
elif len(list) == 1:
emit(ONE_RECENT, period=period)
else:
emit(SOME_RECENT, period=period, count=len(list))
self.format_all(map(lambda (mtime, file): file, list), headers=0)
emit(TAIL_RECENT)
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def do_roulette(self):
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import random
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files = self.dir.list()
if not files:
self.error("No entries.")
return
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file = random.choice(files)
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self.prologue(T_ROULETTE)
emit(ROULETTE)
self.dir.show(file)
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def do_help(self):
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self.prologue(T_HELP)
emit(HELP)
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def do_show(self):
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entry = self.dir.open(self.ui.file)
self.prologue(T_SHOW)
entry.show()
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def do_add(self):
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self.prologue(T_ADD)
emit(ADD_HEAD)
sections = SECTION_TITLES.items()
sections.sort()
for section, title in sections:
emit(ADD_SECTION, section=section, title=title)
emit(ADD_TAIL)
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def do_delete(self):
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self.prologue(T_DELETE)
emit(DELETE)
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def do_log(self):
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entry = self.dir.open(self.ui.file)
self.prologue(T_LOG, entry)
emit(LOG, entry)
self.rlog(interpolate(SH_RLOG, entry), entry)
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def rlog(self, command, entry=None):
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output = os.popen(command).read()
sys.stdout.write('<PRE>')
athead = 0
lines = string.split(output, '\n')
while lines and not lines[-1]:
del lines[-1]
if lines:
line = lines[-1]
if line[:1] == '=' and len(line) >= 40 and \
line == line[0]*len(line):
del lines[-1]
headrev = None
for line in lines:
if entry and athead and line[:9] == 'revision ':
rev = string.strip(line[9:])
mami = revparse(rev)
if not mami:
print line
else:
emit(REVISIONLINK, entry, rev=rev, line=line)
if mami[1] > 1:
prev = "%d.%d" % (mami[0], mami[1]-1)
emit(DIFFLINK, entry, prev=prev, rev=rev)
if headrev:
emit(DIFFLINK, entry, prev=rev, rev=headrev)
else:
headrev = rev
print
athead = 0
else:
athead = 0
if line[:1] == '-' and len(line) >= 20 and \
line == len(line) * line[0]:
athead = 1
sys.stdout.write('<HR>')
else:
print line
print '</PRE>'
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def do_revision(self):
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entry = self.dir.open(self.ui.file)
rev = self.ui.rev
mami = revparse(rev)
if not mami:
self.error("Invalid revision number: %s." % `rev`)
self.prologue(T_REVISION, entry)
self.shell(interpolate(SH_REVISION, entry, rev=rev))
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def do_diff(self):
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entry = self.dir.open(self.ui.file)
prev = self.ui.prev
rev = self.ui.rev
mami = revparse(rev)
if not mami:
self.error("Invalid revision number: %s." % `rev`)
if prev:
if not revparse(prev):
self.error("Invalid previous revision number: %s." % `prev`)
else:
prev = '%d.%d' % (mami[0], mami[1])
self.prologue(T_DIFF, entry)
self.shell(interpolate(SH_RDIFF, entry, rev=rev, prev=prev))
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def shell(self, command):
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output = os.popen(command).read()
sys.stdout.write('<PRE>')
print escape(output)
print '</PRE>'
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def do_new(self):
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entry = self.dir.new(section=string.atoi(self.ui.section))
entry.version = '*new*'
self.prologue(T_EDIT)
emit(EDITHEAD)
emit(EDITFORM1, entry, editversion=entry.version)
emit(EDITFORM2, entry, load_my_cookie())
emit(EDITFORM3)
entry.show(edit=0)
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def do_edit(self):
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entry = self.dir.open(self.ui.file)
entry.load_version()
self.prologue(T_EDIT)
emit(EDITHEAD)
emit(EDITFORM1, entry, editversion=entry.version)
emit(EDITFORM2, entry, load_my_cookie())
emit(EDITFORM3)
entry.show(edit=0)
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def do_review(self):
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send_my_cookie(self.ui)
if self.ui.editversion == '*new*':
sec, num = self.dir.parse(self.ui.file)
entry = self.dir.new(section=sec)
entry.version = "*new*"
if entry.file != self.ui.file:
self.error("Commit version conflict!")
emit(NEWCONFLICT, self.ui, sec=sec, num=num)
return
else:
entry = self.dir.open(self.ui.file)
entry.load_version()
# Check that the FAQ entry number didn't change
if string.split(self.ui.title)[:1] != string.split(entry.title)[:1]:
self.error("Don't change the entry number please!")
return
# Check that the edited version is the current version
if entry.version != self.ui.editversion:
self.error("Commit version conflict!")
emit(VERSIONCONFLICT, entry, self.ui)
return
commit_ok = ((not PASSWORD
or self.ui.password == PASSWORD)
and self.ui.author
and '@' in self.ui.email
and self.ui.log)
if self.ui.commit:
if not commit_ok:
self.cantcommit()
else:
self.commit(entry)
return
self.prologue(T_REVIEW)
emit(REVIEWHEAD)
entry.body = self.ui.body
entry.title = self.ui.title
entry.show(edit=0)
emit(EDITFORM1, self.ui, entry)
if commit_ok:
emit(COMMIT)
else:
emit(NOCOMMIT)
emit(EDITFORM2, self.ui, entry, load_my_cookie())
emit(EDITFORM3)
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def cantcommit(self):
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self.prologue(T_CANTCOMMIT)
print CANTCOMMIT_HEAD
if not self.ui.passwd:
emit(NEED_PASSWD)
if not self.ui.log:
emit(NEED_LOG)
if not self.ui.author:
emit(NEED_AUTHOR)
if not self.ui.email:
emit(NEED_EMAIL)
print CANTCOMMIT_TAIL
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def commit(self, entry):
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file = entry.file
# Normalize line endings in body
if '\r' in self.ui.body:
self.ui.body = re.sub('\r\n?', '\n', self.ui.body)
# Normalize whitespace in title
self.ui.title = string.join(string.split(self.ui.title))
# Check that there were any changes
if self.ui.body == entry.body and self.ui.title == entry.title:
self.error("You didn't make any changes!")
return
# XXX Should lock here
try:
os.unlink(file)
except os.error:
pass
try:
f = open(file, 'w')
except IOError, why:
self.error(CANTWRITE, file=file, why=why)
return
date = time.ctime(now)
emit(FILEHEADER, self.ui, os.environ, date=date, _file=f, _quote=0)
f.write('\n')
f.write(self.ui.body)
f.write('\n')
f.close()
import tempfile
tfn = tempfile.mktemp()
f = open(tfn, 'w')
emit(LOGHEADER, self.ui, os.environ, date=date, _file=f)
f.close()
command = interpolate(
SH_LOCK + '\n' + SH_CHECKIN,
file=file, tfn=tfn)
p = os.popen(command)
output = p.read()
sts = p.close()
# XXX Should unlock here
if not sts:
self.prologue(T_COMMITTED)
emit(COMMITTED)
else:
self.error(T_COMMITFAILED)
emit(COMMITFAILED, sts=sts)
print '<PRE>%s</PRE>' % escape(output)
try:
os.unlink(tfn)
except os.error:
pass
entry = self.dir.open(file)
entry.show()
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wiz = FaqWizard()
wiz.go()