strip: introduce a soft strip option
This is the first user-accessible way to use the archived phase introduced in
4.8. This implements a feature discussed during the Stockholm sprint, using
the archived phase for hiding changesets.
The archived phase behaves exactly as stripping: changesets are no longer
visible, but pulling/unbundling them will make then reappear. The only notable
difference is that unlike hard stripping, soft stripping does not affect
obsmarkers.
The next changeset will make use of the archived phase for history rewriting
command. However, having a way to manually trigger the feature first seems a
necessary step before exposing users to this phase; there is a way to
un-archived changesets (unbundling), so there must be a way to archive them
again.
Adding a flag to strip is a good way to provide access to the feature without
taking a too big risk on the final UI we want. The flag is experimental so it
won't be exposed by default.
Using the archived phase is faster and less traumatic for the repository than
actually stripping changesets.
# win32text.py - LF <-> CRLF/CR translation utilities for Windows/Mac users
#
# Copyright 2005, 2007-2009 Matt Mackall <mpm@selenic.com> and others
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.
'''perform automatic newline conversion (DEPRECATED)
Deprecation: The win32text extension requires each user to configure
the extension again and again for each clone since the configuration
is not copied when cloning.
We have therefore made the ``eol`` as an alternative. The ``eol``
uses a version controlled file for its configuration and each clone
will therefore use the right settings from the start.
To perform automatic newline conversion, use::
[extensions]
win32text =
[encode]
** = cleverencode:
# or ** = macencode:
[decode]
** = cleverdecode:
# or ** = macdecode:
If not doing conversion, to make sure you do not commit CRLF/CR by accident::
[hooks]
pretxncommit.crlf = python:hgext.win32text.forbidcrlf
# or pretxncommit.cr = python:hgext.win32text.forbidcr
To do the same check on a server to prevent CRLF/CR from being
pushed or pulled::
[hooks]
pretxnchangegroup.crlf = python:hgext.win32text.forbidcrlf
# or pretxnchangegroup.cr = python:hgext.win32text.forbidcr
'''
from __future__ import absolute_import
import re
from mercurial.i18n import _
from mercurial.node import (
short,
)
from mercurial import (
pycompat,
registrar,
)
from mercurial.utils import (
stringutil,
)
# Note for extension authors: ONLY specify testedwith = 'ships-with-hg-core' for
# extensions which SHIP WITH MERCURIAL. Non-mainline extensions should
# be specifying the version(s) of Mercurial they are tested with, or
# leave the attribute unspecified.
testedwith = 'ships-with-hg-core'
configtable = {}
configitem = registrar.configitem(configtable)
configitem('win32text', 'warn',
default=True,
)
# regexp for single LF without CR preceding.
re_single_lf = re.compile('(^|[^\r])\n', re.MULTILINE)
newlinestr = {'\r\n': 'CRLF', '\r': 'CR'}
filterstr = {'\r\n': 'clever', '\r': 'mac'}
def checknewline(s, newline, ui=None, repo=None, filename=None):
# warn if already has 'newline' in repository.
# it might cause unexpected eol conversion.
# see issue 302:
# https://bz.mercurial-scm.org/302
if newline in s and ui and filename and repo:
ui.warn(_('WARNING: %s already has %s line endings\n'
'and does not need EOL conversion by the win32text plugin.\n'
'Before your next commit, please reconsider your '
'encode/decode settings in \nMercurial.ini or %s.\n') %
(filename, newlinestr[newline], repo.vfs.join('hgrc')))
def dumbdecode(s, cmd, **kwargs):
checknewline(s, '\r\n', **kwargs)
# 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 macdumbdecode(s, cmd, **kwargs):
checknewline(s, '\r', **kwargs)
return s.replace('\n', '\r')
def macdumbencode(s, cmd):
return s.replace('\r', '\n')
def cleverdecode(s, cmd, **kwargs):
if not stringutil.binary(s):
return dumbdecode(s, cmd, **kwargs)
return s
def cleverencode(s, cmd):
if not stringutil.binary(s):
return dumbencode(s, cmd)
return s
def macdecode(s, cmd, **kwargs):
if not stringutil.binary(s):
return macdumbdecode(s, cmd, **kwargs)
return s
def macencode(s, cmd):
if not stringutil.binary(s):
return macdumbencode(s, cmd)
return s
_filters = {
'dumbdecode:': dumbdecode,
'dumbencode:': dumbencode,
'cleverdecode:': cleverdecode,
'cleverencode:': cleverencode,
'macdumbdecode:': macdumbdecode,
'macdumbencode:': macdumbencode,
'macdecode:': macdecode,
'macencode:': macencode,
}
def forbidnewline(ui, repo, hooktype, node, newline, **kwargs):
halt = False
seen = set()
# we try to walk changesets in reverse order from newest to
# oldest, so that if we see a file multiple times, we take the
# newest version as canonical. this prevents us from blocking a
# changegroup that contains an unacceptable commit followed later
# by a commit that fixes the problem.
tip = repo['tip']
for rev in pycompat.xrange(repo.changelog.tiprev(),
repo[node].rev() - 1, -1):
c = repo[rev]
for f in c.files():
if f in seen or f not in tip or f not in c:
continue
seen.add(f)
data = c[f].data()
if not stringutil.binary(data) and newline in data:
if not halt:
ui.warn(_('attempt to commit or push text file(s) '
'using %s line endings\n') %
newlinestr[newline])
ui.warn(_('in %s: %s\n') % (short(c.node()), f))
halt = True
if halt and hooktype == 'pretxnchangegroup':
crlf = newlinestr[newline].lower()
filter = filterstr[newline]
ui.warn(_('\nTo prevent this mistake in your local repository,\n'
'add to Mercurial.ini or .hg/hgrc:\n'
'\n'
'[hooks]\n'
'pretxncommit.%s = python:hgext.win32text.forbid%s\n'
'\n'
'and also consider adding:\n'
'\n'
'[extensions]\n'
'win32text =\n'
'[encode]\n'
'** = %sencode:\n'
'[decode]\n'
'** = %sdecode:\n') % (crlf, crlf, filter, filter))
return halt
def forbidcrlf(ui, repo, hooktype, node, **kwargs):
return forbidnewline(ui, repo, hooktype, node, '\r\n', **kwargs)
def forbidcr(ui, repo, hooktype, node, **kwargs):
return forbidnewline(ui, repo, hooktype, node, '\r', **kwargs)
def reposetup(ui, repo):
if not repo.local():
return
for name, fn in _filters.iteritems():
repo.adddatafilter(name, fn)
def extsetup(ui):
# deprecated config: win32text.warn
if ui.configbool('win32text', 'warn'):
ui.warn(_("win32text is deprecated: "
"https://mercurial-scm.org/wiki/Win32TextExtension\n"))