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7049209b6a
This attributes hold the set of all revisions that should be ommited by command and tools displaying changesets. This set is given as a hit. Command and tools are responsible to check it in order to filter they outpur. Code adding revisions to the set are responsible to the consistency of it's data.
245 lines
8.4 KiB
Python
245 lines
8.4 KiB
Python
# changelog.py - changelog class for mercurial
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#
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# Copyright 2005-2007 Matt Mackall <mpm@selenic.com>
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#
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# This software may be used and distributed according to the terms of the
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# GNU General Public License version 2 or any later version.
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from node import bin, hex, nullid
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from i18n import _
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import util, error, revlog, encoding
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def _string_escape(text):
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"""
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>>> d = {'nl': chr(10), 'bs': chr(92), 'cr': chr(13), 'nul': chr(0)}
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>>> s = "ab%(nl)scd%(bs)s%(bs)sn%(nul)sab%(cr)scd%(bs)s%(nl)s" % d
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>>> s
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'ab\\ncd\\\\\\\\n\\x00ab\\rcd\\\\\\n'
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>>> res = _string_escape(s)
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>>> s == res.decode('string_escape')
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True
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"""
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# subset of the string_escape codec
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text = text.replace('\\', '\\\\').replace('\n', '\\n').replace('\r', '\\r')
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return text.replace('\0', '\\0')
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def decodeextra(text):
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extra = {}
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for l in text.split('\0'):
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if l:
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k, v = l.decode('string_escape').split(':', 1)
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extra[k] = v
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return extra
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def encodeextra(d):
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# keys must be sorted to produce a deterministic changelog entry
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items = [_string_escape('%s:%s' % (k, d[k])) for k in sorted(d)]
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return "\0".join(items)
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class appender(object):
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'''the changelog index must be updated last on disk, so we use this class
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to delay writes to it'''
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def __init__(self, fp, buf):
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self.data = buf
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self.fp = fp
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self.offset = fp.tell()
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self.size = util.fstat(fp).st_size
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def end(self):
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return self.size + len("".join(self.data))
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def tell(self):
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return self.offset
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def flush(self):
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pass
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def close(self):
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self.fp.close()
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def seek(self, offset, whence=0):
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'''virtual file offset spans real file and data'''
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if whence == 0:
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self.offset = offset
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elif whence == 1:
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self.offset += offset
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elif whence == 2:
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self.offset = self.end() + offset
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if self.offset < self.size:
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self.fp.seek(self.offset)
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def read(self, count=-1):
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'''only trick here is reads that span real file and data'''
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ret = ""
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if self.offset < self.size:
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s = self.fp.read(count)
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ret = s
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self.offset += len(s)
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if count > 0:
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count -= len(s)
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if count != 0:
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doff = self.offset - self.size
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self.data.insert(0, "".join(self.data))
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del self.data[1:]
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s = self.data[0][doff:doff + count]
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self.offset += len(s)
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ret += s
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return ret
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def write(self, s):
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self.data.append(str(s))
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self.offset += len(s)
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def delayopener(opener, target, divert, buf):
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def o(name, mode='r'):
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if name != target:
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return opener(name, mode)
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if divert:
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return opener(name + ".a", mode.replace('a', 'w'))
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# otherwise, divert to memory
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return appender(opener(name, mode), buf)
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return o
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class changelog(revlog.revlog):
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def __init__(self, opener):
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revlog.revlog.__init__(self, opener, "00changelog.i")
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if self._initempty:
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# changelogs don't benefit from generaldelta
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self.version &= ~revlog.REVLOGGENERALDELTA
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self._generaldelta = False
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self._realopener = opener
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self._delayed = False
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self._divert = False
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# hiddenrevs: revs that should be hidden by command and tools
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self.hiddenrevs = set()
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def delayupdate(self):
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"delay visibility of index updates to other readers"
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self._delayed = True
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self._divert = (len(self) == 0)
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self._delaybuf = []
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self.opener = delayopener(self._realopener, self.indexfile,
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self._divert, self._delaybuf)
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def finalize(self, tr):
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"finalize index updates"
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self._delayed = False
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self.opener = self._realopener
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# move redirected index data back into place
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if self._divert:
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nfile = self.opener(self.indexfile + ".a")
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n = nfile.name
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nfile.close()
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util.rename(n, n[:-2])
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elif self._delaybuf:
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fp = self.opener(self.indexfile, 'a')
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fp.write("".join(self._delaybuf))
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fp.close()
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self._delaybuf = []
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# split when we're done
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self.checkinlinesize(tr)
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def readpending(self, file):
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r = revlog.revlog(self.opener, file)
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self.index = r.index
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self.nodemap = r.nodemap
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self._chunkcache = r._chunkcache
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def writepending(self):
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"create a file containing the unfinalized state for pretxnchangegroup"
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if self._delaybuf:
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# make a temporary copy of the index
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fp1 = self._realopener(self.indexfile)
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fp2 = self._realopener(self.indexfile + ".a", "w")
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fp2.write(fp1.read())
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# add pending data
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fp2.write("".join(self._delaybuf))
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fp2.close()
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# switch modes so finalize can simply rename
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self._delaybuf = []
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self._divert = True
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if self._divert:
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return True
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return False
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def checkinlinesize(self, tr, fp=None):
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if not self._delayed:
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revlog.revlog.checkinlinesize(self, tr, fp)
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def read(self, node):
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"""
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format used:
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nodeid\n : manifest node in ascii
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user\n : user, no \n or \r allowed
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time tz extra\n : date (time is int or float, timezone is int)
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: extra is metadatas, encoded and separated by '\0'
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: older versions ignore it
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files\n\n : files modified by the cset, no \n or \r allowed
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(.*) : comment (free text, ideally utf-8)
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changelog v0 doesn't use extra
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"""
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text = self.revision(node)
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if not text:
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return (nullid, "", (0, 0), [], "", {'branch': 'default'})
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last = text.index("\n\n")
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desc = encoding.tolocal(text[last + 2:])
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l = text[:last].split('\n')
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manifest = bin(l[0])
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user = encoding.tolocal(l[1])
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extra_data = l[2].split(' ', 2)
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if len(extra_data) != 3:
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time = float(extra_data.pop(0))
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try:
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# various tools did silly things with the time zone field.
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timezone = int(extra_data[0])
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except ValueError:
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timezone = 0
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extra = {}
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else:
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time, timezone, extra = extra_data
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time, timezone = float(time), int(timezone)
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extra = decodeextra(extra)
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if not extra.get('branch'):
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extra['branch'] = 'default'
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files = l[3:]
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return (manifest, user, (time, timezone), files, desc, extra)
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def add(self, manifest, files, desc, transaction, p1, p2,
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user, date=None, extra=None):
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# Convert to UTF-8 encoded bytestrings as the very first
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# thing: calling any method on a localstr object will turn it
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# into a str object and the cached UTF-8 string is thus lost.
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user, desc = encoding.fromlocal(user), encoding.fromlocal(desc)
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user = user.strip()
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# An empty username or a username with a "\n" will make the
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# revision text contain two "\n\n" sequences -> corrupt
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# repository since read cannot unpack the revision.
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if not user:
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raise error.RevlogError(_("empty username"))
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if "\n" in user:
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raise error.RevlogError(_("username %s contains a newline")
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% repr(user))
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# strip trailing whitespace and leading and trailing empty lines
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desc = '\n'.join([l.rstrip() for l in desc.splitlines()]).strip('\n')
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if date:
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parseddate = "%d %d" % util.parsedate(date)
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else:
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parseddate = "%d %d" % util.makedate()
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if extra:
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branch = extra.get("branch")
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if branch in ("default", ""):
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del extra["branch"]
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elif branch in (".", "null", "tip"):
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raise error.RevlogError(_('the name \'%s\' is reserved')
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% branch)
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if extra:
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extra = encodeextra(extra)
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parseddate = "%s %s" % (parseddate, extra)
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l = [hex(manifest), user, parseddate] + sorted(files) + ["", desc]
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text = "\n".join(l)
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return self.addrevision(text, transaction, len(self), p1, p2)
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