revlog: fix revlogio.packentry corner case
We want to store version information about the revlog in the first
entry of its index. The code in packentry was using some heuristics
to detect whether this was the first entry, but these heuristics could
fail in some cases (e.g. rev 0 was empty; rev 1 descends directly from
the nullid and is stored as a delta).
We now give the revision number to packentry to avoid heuristics.
from mercurial import util, ui
from mercurial.i18n import gettext as _
import re
# regexp for single LF without CR preceding.
re_single_lf = re.compile('(^|[^\r])\n', re.MULTILINE)
def dumbdecode(s, cmd):
# warn if already has CRLF in repository.
# it might cause unexpected eol conversion.
# see issue 302:
# http://www.selenic.com/mercurial/bts/issue302
if '\r\n' in s:
u = ui.ui()
u.warn(_('WARNING: file in repository already has CRLF line ending \n'
' which does not need eol conversion by win32text plugin.\n'
' Please reconsider encode/decode setting in'
' mercurial.ini or .hg/hgrc\n'
' before next commit.\n'))
# replace single LF to CRLF
return re_single_lf.sub('\\1\r\n', s)
def dumbencode(s, cmd):
return s.replace('\r\n', '\n')
def clevertest(s, cmd):
if '\0' in s: return False
return True
def cleverdecode(s, cmd):
if clevertest(s, cmd):
return dumbdecode(s, cmd)
return s
def cleverencode(s, cmd):
if clevertest(s, cmd):
return dumbencode(s, cmd)
return s
util.filtertable.update({
'dumbdecode:': dumbdecode,
'dumbencode:': dumbencode,
'cleverdecode:': cleverdecode,
'cleverencode:': cleverencode,
})