mirror of
https://github.com/facebook/sapling.git
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c506eac122
pprint ain't pretty in Python 2.4: Changed in version 2.5: Dictionaries are sorted by key before the display is computed; before 2.5, a dictionary was sorted only if its display required more than one line, although that wasn’t documented. Fixes issue introduced in 06396987f8e8.
350 lines
12 KiB
Python
350 lines
12 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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_defaultextra = {'branch': 'default'}
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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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"""
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>>> sorted(decodeextra(encodeextra({'foo': 'bar', 'baz': chr(0) + '2'})
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... ).iteritems())
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[('baz', '\\x002'), ('branch', 'default'), ('foo', 'bar')]
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>>> sorted(decodeextra(encodeextra({'foo': 'bar',
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... 'baz': chr(92) + chr(0) + '2'})
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... ).iteritems())
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[('baz', '\\\\\\x002'), ('branch', 'default'), ('foo', 'bar')]
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"""
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extra = _defaultextra.copy()
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for l in text.split('\0'):
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if l:
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if '\\0' in l:
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# fix up \0 without getting into trouble with \\0
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l = l.replace('\\\\', '\\\\\n')
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l = l.replace('\\0', '\0')
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l = l.replace('\n', '')
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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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def stripdesc(desc):
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"""strip trailing whitespace and leading and trailing empty lines"""
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return '\n'.join([l.rstrip() for l in desc.splitlines()]).strip('\n')
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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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self.filteredrevs = frozenset()
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def tip(self):
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"""filtered version of revlog.tip"""
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for i in xrange(len(self) -1, -2, -1):
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if i not in self.filteredrevs:
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return self.node(i)
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def __iter__(self):
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"""filtered version of revlog.__iter__"""
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if len(self.filteredrevs) == 0:
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return revlog.revlog.__iter__(self)
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def filterediter():
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for i in xrange(len(self)):
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if i not in self.filteredrevs:
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yield i
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return filterediter()
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def revs(self, start=0, stop=None):
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"""filtered version of revlog.revs"""
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for i in super(changelog, self).revs(start, stop):
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if i not in self.filteredrevs:
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yield i
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@util.propertycache
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def nodemap(self):
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# XXX need filtering too
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self.rev(self.node(0))
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return self._nodecache
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def hasnode(self, node):
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"""filtered version of revlog.hasnode"""
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try:
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i = self.rev(node)
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return i not in self.filteredrevs
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except KeyError:
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return False
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def headrevs(self):
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if self.filteredrevs:
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# XXX we should fix and use the C version
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return self._headrevs()
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return super(changelog, self).headrevs()
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def strip(self, *args, **kwargs):
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# XXX make something better than assert
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# We can't expect proper strip behavior if we are filtered.
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assert not self.filteredrevs
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super(changelog, self).strip(*args, **kwargs)
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def rev(self, node):
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"""filtered version of revlog.rev"""
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r = super(changelog, self).rev(node)
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if r in self.filteredrevs:
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raise error.LookupError(node, self.indexfile, _('no node'))
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return r
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def node(self, rev):
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"""filtered version of revlog.node"""
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if rev in self.filteredrevs:
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raise IndexError(rev)
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return super(changelog, self).node(rev)
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def linkrev(self, rev):
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"""filtered version of revlog.linkrev"""
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if rev in self.filteredrevs:
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raise IndexError(rev)
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return super(changelog, self).linkrev(rev)
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def parentrevs(self, rev):
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"""filtered version of revlog.parentrevs"""
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if rev in self.filteredrevs:
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raise IndexError(rev)
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return super(changelog, self).parentrevs(rev)
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def flags(self, rev):
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"""filtered version of revlog.flags"""
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if rev in self.filteredrevs:
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raise IndexError(rev)
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return super(changelog, self).flags(rev)
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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._nodecache = r._nodecache
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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 metadata, 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), [], "", _defaultextra)
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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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tdata = l[2].split(' ', 2)
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if len(tdata) != 3:
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time = float(tdata[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(tdata[1])
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except ValueError:
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timezone = 0
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extra = _defaultextra
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else:
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time, timezone = float(tdata[0]), int(tdata[1])
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extra = decodeextra(tdata[2])
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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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desc = stripdesc(desc)
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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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def branch(self, rev):
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"""return the branch of a revision
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This function exists because creating a changectx object
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just to access this is costly."""
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return encoding.tolocal(self.read(rev)[5].get("branch"))
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