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# 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 __future__ import absolute_import
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from .i18n import _
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from .node import (
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bin,
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hex,
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nullid,
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)
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from .thirdparty import attr
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from . import (
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copies,
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encoding,
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error,
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pycompat,
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revlog,
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)
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from .utils import (
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dateutil,
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stringutil,
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)
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from .revlogutils import sidedata as sidedatamod
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_defaultextra = {b'branch': b'default'}
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def _string_escape(text):
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"""
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>>> from .pycompat import bytechr as chr
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>>> d = {b'nl': chr(10), b'bs': chr(92), b'cr': chr(13), b'nul': chr(0)}
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>>> s = b"ab%(nl)scd%(bs)s%(bs)sn%(nul)s12ab%(cr)scd%(bs)s%(nl)s" % d
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>>> s
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'ab\\ncd\\\\\\\\n\\x0012ab\\rcd\\\\\\n'
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>>> res = _string_escape(s)
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>>> s == _string_unescape(res)
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True
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"""
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# subset of the string_escape codec
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text = (
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text.replace(b'\\', b'\\\\')
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.replace(b'\n', b'\\n')
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.replace(b'\r', b'\\r')
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)
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return text.replace(b'\0', b'\\0')
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def _string_unescape(text):
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if b'\\0' in text:
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# fix up \0 without getting into trouble with \\0
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text = text.replace(b'\\\\', b'\\\\\n')
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text = text.replace(b'\\0', b'\0')
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text = text.replace(b'\n', b'')
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return stringutil.unescapestr(text)
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def decodeextra(text):
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"""
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>>> from .pycompat import bytechr as chr
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>>> sorted(decodeextra(encodeextra({b'foo': b'bar', b'baz': chr(0) + b'2'})
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... ).items())
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[('baz', '\\x002'), ('branch', 'default'), ('foo', 'bar')]
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>>> sorted(decodeextra(encodeextra({b'foo': b'bar',
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... b'baz': chr(92) + chr(0) + b'2'})
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... ).items())
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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(b'\0'):
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if l:
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k, v = _string_unescape(l).split(b':', 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 = [
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_string_escape(b'%s:%s' % (k, pycompat.bytestr(d[k])))
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for k in sorted(d)
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]
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return b"\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 b'\n'.join([l.rstrip() for l in desc.splitlines()]).strip(b'\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, vfs, name, mode, buf):
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self.data = buf
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fp = vfs(name, mode)
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self.fp = fp
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self.offset = fp.tell()
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self.size = vfs.fstat(fp).st_size
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self._end = self.size
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def end(self):
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return self._end
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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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@property
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def closed(self):
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return self.fp.closed
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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 = b""
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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, b"".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(bytes(s))
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self.offset += len(s)
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self._end += len(s)
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def __enter__(self):
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self.fp.__enter__()
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return self
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def __exit__(self, *args):
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return self.fp.__exit__(*args)
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def _divertopener(opener, target):
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"""build an opener that writes in 'target.a' instead of 'target'"""
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def _divert(name, mode=b'r', checkambig=False):
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if name != target:
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return opener(name, mode)
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return opener(name + b".a", mode)
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return _divert
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def _delayopener(opener, target, buf):
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"""build an opener that stores chunks in 'buf' instead of 'target'"""
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def _delay(name, mode=b'r', checkambig=False):
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if name != target:
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return opener(name, mode)
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return appender(opener, name, mode, buf)
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return _delay
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@attr.s
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class _changelogrevision(object):
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# Extensions might modify _defaultextra, so let the constructor below pass
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# it in
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extra = attr.ib()
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manifest = attr.ib(default=nullid)
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user = attr.ib(default=b'')
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date = attr.ib(default=(0, 0))
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files = attr.ib(default=attr.Factory(list))
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filesadded = attr.ib(default=None)
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filesremoved = attr.ib(default=None)
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p1copies = attr.ib(default=None)
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p2copies = attr.ib(default=None)
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description = attr.ib(default=b'')
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class changelogrevision(object):
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"""Holds results of a parsed changelog revision.
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Changelog revisions consist of multiple pieces of data, including
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the manifest node, user, and date. This object exposes a view into
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the parsed object.
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"""
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__slots__ = (
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r'_offsets',
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r'_text',
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r'_sidedata',
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r'_cpsd',
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)
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def __new__(cls, text, sidedata, cpsd):
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if not text:
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return _changelogrevision(extra=_defaultextra)
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self = super(changelogrevision, cls).__new__(cls)
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# We could return here and implement the following as an __init__.
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# But doing it here is equivalent and saves an extra function call.
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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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#
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# changelog v0 doesn't use extra
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nl1 = text.index(b'\n')
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nl2 = text.index(b'\n', nl1 + 1)
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nl3 = text.index(b'\n', nl2 + 1)
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# The list of files may be empty. Which means nl3 is the first of the
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# double newline that precedes the description.
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if text[nl3 + 1 : nl3 + 2] == b'\n':
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doublenl = nl3
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else:
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doublenl = text.index(b'\n\n', nl3 + 1)
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self._offsets = (nl1, nl2, nl3, doublenl)
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self._text = text
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self._sidedata = sidedata
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self._cpsd = cpsd
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return self
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@property
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def manifest(self):
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return bin(self._text[0 : self._offsets[0]])
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@property
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def user(self):
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off = self._offsets
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return encoding.tolocal(self._text[off[0] + 1 : off[1]])
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@property
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def _rawdate(self):
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off = self._offsets
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dateextra = self._text[off[1] + 1 : off[2]]
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return dateextra.split(b' ', 2)[0:2]
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@property
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def _rawextra(self):
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off = self._offsets
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dateextra = self._text[off[1] + 1 : off[2]]
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fields = dateextra.split(b' ', 2)
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if len(fields) != 3:
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return None
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return fields[2]
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@property
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def date(self):
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raw = self._rawdate
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time = float(raw[0])
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# Various tools did silly things with the timezone.
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try:
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timezone = int(raw[1])
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except ValueError:
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timezone = 0
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return time, timezone
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@property
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def extra(self):
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raw = self._rawextra
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if raw is None:
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return _defaultextra
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return decodeextra(raw)
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@property
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def files(self):
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off = self._offsets
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if off[2] == off[3]:
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return []
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return self._text[off[2] + 1 : off[3]].split(b'\n')
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@property
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def filesadded(self):
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if self._cpsd:
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rawindices = self._sidedata.get(sidedatamod.SD_FILESADDED)
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if not rawindices:
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return []
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else:
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rawindices = self.extra.get(b'filesadded')
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if rawindices is None:
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return None
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return copies.decodefileindices(self.files, rawindices)
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@property
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def filesremoved(self):
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if self._cpsd:
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rawindices = self._sidedata.get(sidedatamod.SD_FILESREMOVED)
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if not rawindices:
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return []
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else:
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rawindices = self.extra.get(b'filesremoved')
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if rawindices is None:
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return None
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return copies.decodefileindices(self.files, rawindices)
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@property
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def p1copies(self):
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if self._cpsd:
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rawcopies = self._sidedata.get(sidedatamod.SD_P1COPIES)
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if not rawcopies:
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return {}
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else:
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rawcopies = self.extra.get(b'p1copies')
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if rawcopies is None:
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return None
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return copies.decodecopies(self.files, rawcopies)
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@property
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def p2copies(self):
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if self._cpsd:
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rawcopies = self._sidedata.get(sidedatamod.SD_P2COPIES)
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if not rawcopies:
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return {}
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else:
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rawcopies = self.extra.get(b'p2copies')
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if rawcopies is None:
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return None
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return copies.decodecopies(self.files, rawcopies)
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@property
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def description(self):
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return encoding.tolocal(self._text[self._offsets[3] + 2 :])
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class changelog(revlog.revlog):
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def __init__(self, opener, trypending=False):
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"""Load a changelog revlog using an opener.
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If ``trypending`` is true, we attempt to load the index from a
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``00changelog.i.a`` file instead of the default ``00changelog.i``.
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The ``00changelog.i.a`` file contains index (and possibly inline
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revision) data for a transaction that hasn't been finalized yet.
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It exists in a separate file to facilitate readers (such as
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hooks processes) accessing data before a transaction is finalized.
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"""
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if trypending and opener.exists(b'00changelog.i.a'):
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indexfile = b'00changelog.i.a'
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else:
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indexfile = b'00changelog.i'
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datafile = b'00changelog.d'
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revlog.revlog.__init__(
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self,
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opener,
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indexfile,
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datafile=datafile,
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checkambig=True,
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mmaplargeindex=True,
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)
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if self._initempty and (self.version & 0xFFFF == revlog.REVLOGV1):
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# changelogs don't benefit from generaldelta.
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self.version &= ~revlog.FLAG_GENERALDELTA
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self._generaldelta = False
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# Delta chains for changelogs tend to be very small because entries
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# tend to be small and don't delta well with each. So disable delta
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# chains.
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self._storedeltachains = False
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self._realopener = opener
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self._delayed = False
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self._delaybuf = None
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self._divert = False
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self.filteredrevs = frozenset()
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self._copiesstorage = opener.options.get(b'copies-storage')
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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 error.FilteredIndexError(rev)
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return super(changelog, self).flags(rev)
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def delayupdate(self, tr):
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b"delay visibility of index updates to other readers"
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if not self._delayed:
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if len(self) == 0:
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self._divert = True
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if self._realopener.exists(self.indexfile + b'.a'):
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self._realopener.unlink(self.indexfile + b'.a')
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self.opener = _divertopener(self._realopener, self.indexfile)
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else:
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self._delaybuf = []
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self.opener = _delayopener(
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self._realopener, self.indexfile, self._delaybuf
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)
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self._delayed = True
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tr.addpending(b'cl-%i' % id(self), self._writepending)
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tr.addfinalize(b'cl-%i' % id(self), self._finalize)
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def _finalize(self, tr):
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b"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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assert not self._delaybuf
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tmpname = self.indexfile + b".a"
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nfile = self.opener.open(tmpname)
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nfile.close()
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self.opener.rename(tmpname, self.indexfile, checkambig=True)
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elif self._delaybuf:
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fp = self.opener(self.indexfile, b'a', checkambig=True)
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fp.write(b"".join(self._delaybuf))
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fp.close()
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self._delaybuf = None
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self._divert = False
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# split when we're done
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self._enforceinlinesize(tr)
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def _writepending(self, tr):
|
|
|
b"create a file containing the unfinalized state for pretxnchangegroup"
|
|
|
if self._delaybuf:
|
|
|
# make a temporary copy of the index
|
|
|
fp1 = self._realopener(self.indexfile)
|
|
|
pendingfilename = self.indexfile + b".a"
|
|
|
# register as a temp file to ensure cleanup on failure
|
|
|
tr.registertmp(pendingfilename)
|
|
|
# write existing data
|
|
|
fp2 = self._realopener(pendingfilename, b"w")
|
|
|
fp2.write(fp1.read())
|
|
|
# add pending data
|
|
|
fp2.write(b"".join(self._delaybuf))
|
|
|
fp2.close()
|
|
|
# switch modes so finalize can simply rename
|
|
|
self._delaybuf = None
|
|
|
self._divert = True
|
|
|
self.opener = _divertopener(self._realopener, self.indexfile)
|
|
|
|
|
|
if self._divert:
|
|
|
return True
|
|
|
|
|
|
return False
|
|
|
|
|
|
def _enforceinlinesize(self, tr, fp=None):
|
|
|
if not self._delayed:
|
|
|
revlog.revlog._enforceinlinesize(self, tr, fp)
|
|
|
|
|
|
def read(self, node):
|
|
|
"""Obtain data from a parsed changelog revision.
|
|
|
|
|
|
Returns a 6-tuple of:
|
|
|
|
|
|
- manifest node in binary
|
|
|
- author/user as a localstr
|
|
|
- date as a 2-tuple of (time, timezone)
|
|
|
- list of files
|
|
|
- commit message as a localstr
|
|
|
- dict of extra metadata
|
|
|
|
|
|
Unless you need to access all fields, consider calling
|
|
|
``changelogrevision`` instead, as it is faster for partial object
|
|
|
access.
|
|
|
"""
|
|
|
d, s = self._revisiondata(node)
|
|
|
c = changelogrevision(
|
|
|
d, s, self._copiesstorage == b'changeset-sidedata'
|
|
|
)
|
|
|
return (c.manifest, c.user, c.date, c.files, c.description, c.extra)
|
|
|
|
|
|
def changelogrevision(self, nodeorrev):
|
|
|
"""Obtain a ``changelogrevision`` for a node or revision."""
|
|
|
text, sidedata = self._revisiondata(nodeorrev)
|
|
|
return changelogrevision(
|
|
|
text, sidedata, self._copiesstorage == b'changeset-sidedata'
|
|
|
)
|
|
|
|
|
|
def readfiles(self, node):
|
|
|
"""
|
|
|
short version of read that only returns the files modified by the cset
|
|
|
"""
|
|
|
text = self.revision(node)
|
|
|
if not text:
|
|
|
return []
|
|
|
last = text.index(b"\n\n")
|
|
|
l = text[:last].split(b'\n')
|
|
|
return l[3:]
|
|
|
|
|
|
def add(
|
|
|
self,
|
|
|
manifest,
|
|
|
files,
|
|
|
desc,
|
|
|
transaction,
|
|
|
p1,
|
|
|
p2,
|
|
|
user,
|
|
|
date=None,
|
|
|
extra=None,
|
|
|
p1copies=None,
|
|
|
p2copies=None,
|
|
|
filesadded=None,
|
|
|
filesremoved=None,
|
|
|
):
|
|
|
# Convert to UTF-8 encoded bytestrings as the very first
|
|
|
# thing: calling any method on a localstr object will turn it
|
|
|
# into a str object and the cached UTF-8 string is thus lost.
|
|
|
user, desc = encoding.fromlocal(user), encoding.fromlocal(desc)
|
|
|
|
|
|
user = user.strip()
|
|
|
# An empty username or a username with a "\n" will make the
|
|
|
# revision text contain two "\n\n" sequences -> corrupt
|
|
|
# repository since read cannot unpack the revision.
|
|
|
if not user:
|
|
|
raise error.StorageError(_(b"empty username"))
|
|
|
if b"\n" in user:
|
|
|
raise error.StorageError(
|
|
|
_(b"username %r contains a newline") % pycompat.bytestr(user)
|
|
|
)
|
|
|
|
|
|
desc = stripdesc(desc)
|
|
|
|
|
|
if date:
|
|
|
parseddate = b"%d %d" % dateutil.parsedate(date)
|
|
|
else:
|
|
|
parseddate = b"%d %d" % dateutil.makedate()
|
|
|
if extra:
|
|
|
branch = extra.get(b"branch")
|
|
|
if branch in (b"default", b""):
|
|
|
del extra[b"branch"]
|
|
|
elif branch in (b".", b"null", b"tip"):
|
|
|
raise error.StorageError(
|
|
|
_(b'the name \'%s\' is reserved') % branch
|
|
|
)
|
|
|
sortedfiles = sorted(files)
|
|
|
sidedata = None
|
|
|
if extra is not None:
|
|
|
for name in (
|
|
|
b'p1copies',
|
|
|
b'p2copies',
|
|
|
b'filesadded',
|
|
|
b'filesremoved',
|
|
|
):
|
|
|
extra.pop(name, None)
|
|
|
if p1copies is not None:
|
|
|
p1copies = copies.encodecopies(sortedfiles, p1copies)
|
|
|
if p2copies is not None:
|
|
|
p2copies = copies.encodecopies(sortedfiles, p2copies)
|
|
|
if filesadded is not None:
|
|
|
filesadded = copies.encodefileindices(sortedfiles, filesadded)
|
|
|
if filesremoved is not None:
|
|
|
filesremoved = copies.encodefileindices(sortedfiles, filesremoved)
|
|
|
if self._copiesstorage == b'extra':
|
|
|
extrasentries = p1copies, p2copies, filesadded, filesremoved
|
|
|
if extra is None and any(x is not None for x in extrasentries):
|
|
|
extra = {}
|
|
|
if p1copies is not None:
|
|
|
extra[b'p1copies'] = p1copies
|
|
|
if p2copies is not None:
|
|
|
extra[b'p2copies'] = p2copies
|
|
|
if filesadded is not None:
|
|
|
extra[b'filesadded'] = filesadded
|
|
|
if filesremoved is not None:
|
|
|
extra[b'filesremoved'] = filesremoved
|
|
|
elif self._copiesstorage == b'changeset-sidedata':
|
|
|
sidedata = {}
|
|
|
if p1copies:
|
|
|
sidedata[sidedatamod.SD_P1COPIES] = p1copies
|
|
|
if p2copies:
|
|
|
sidedata[sidedatamod.SD_P2COPIES] = p2copies
|
|
|
if filesadded:
|
|
|
sidedata[sidedatamod.SD_FILESADDED] = filesadded
|
|
|
if filesremoved:
|
|
|
sidedata[sidedatamod.SD_FILESREMOVED] = filesremoved
|
|
|
if not sidedata:
|
|
|
sidedata = None
|
|
|
|
|
|
if extra:
|
|
|
extra = encodeextra(extra)
|
|
|
parseddate = b"%s %s" % (parseddate, extra)
|
|
|
l = [hex(manifest), user, parseddate] + sortedfiles + [b"", desc]
|
|
|
text = b"\n".join(l)
|
|
|
return self.addrevision(
|
|
|
text, transaction, len(self), p1, p2, sidedata=sidedata
|
|
|
)
|
|
|
|
|
|
def branchinfo(self, rev):
|
|
|
"""return the branch name and open/close state of a revision
|
|
|
|
|
|
This function exists because creating a changectx object
|
|
|
just to access this is costly."""
|
|
|
extra = self.read(rev)[5]
|
|
|
return encoding.tolocal(extra.get(b"branch")), b'close' in extra
|
|
|
|
|
|
def _nodeduplicatecallback(self, transaction, node):
|
|
|
# keep track of revisions that got "re-added", eg: unbunde of know rev.
|
|
|
#
|
|
|
# We track them in a list to preserve their order from the source bundle
|
|
|
duplicates = transaction.changes.setdefault(b'revduplicates', [])
|
|
|
duplicates.append(self.rev(node))
|
|
|
|