hgext/win32text.py
author Pierre-Yves David <pierre-yves.david@octobus.net>
Sun, 06 Oct 2019 23:36:51 -0400
changeset 43140 12b8a2ef8d04
parent 43105 649d3ac37a12
child 45942 89a2afe31e82
permissions -rw-r--r--
sidedatacopies: introduce a sidedata testcase for test-copies-unrelated.t For now it is equivalent to the filelog case, but introducing this early helps make the comings changesets clearer. Differential Revision: https://phab.mercurial-scm.org/D6948
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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# win32text.py - LF <-> CRLF/CR translation utilities for Windows/Mac users
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#
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#  Copyright 2005, 2007-2009 Matt Mackall <mpm@selenic.com> and others
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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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'''perform automatic newline conversion (DEPRECATED)
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  Deprecation: The win32text extension requires each user to configure
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  the extension again and again for each clone since the configuration
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  is not copied when cloning.
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  We have therefore made the ``eol`` as an alternative. The ``eol``
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  uses a version controlled file for its configuration and each clone
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  will therefore use the right settings from the start.
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To perform automatic newline conversion, use::
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  [extensions]
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  win32text =
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  [encode]
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  ** = cleverencode:
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  # or ** = macencode:
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  [decode]
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  ** = cleverdecode:
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  # or ** = macdecode:
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If not doing conversion, to make sure you do not commit CRLF/CR by accident::
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  [hooks]
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  pretxncommit.crlf = python:hgext.win32text.forbidcrlf
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  # or pretxncommit.cr = python:hgext.win32text.forbidcr
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To do the same check on a server to prevent CRLF/CR from being
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pushed or pulled::
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  [hooks]
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  pretxnchangegroup.crlf = python:hgext.win32text.forbidcrlf
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  # or pretxnchangegroup.cr = python:hgext.win32text.forbidcr
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'''
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from __future__ import absolute_import
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import re
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from mercurial.i18n import _
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from mercurial.node import short
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from mercurial import (
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    pycompat,
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    registrar,
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)
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from mercurial.utils import stringutil
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# Note for extension authors: ONLY specify testedwith = 'ships-with-hg-core' for
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# extensions which SHIP WITH MERCURIAL. Non-mainline extensions should
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# be specifying the version(s) of Mercurial they are tested with, or
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# leave the attribute unspecified.
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testedwith = b'ships-with-hg-core'
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configtable = {}
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configitem = registrar.configitem(configtable)
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configitem(
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    b'win32text', b'warn', default=True,
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)
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# regexp for single LF without CR preceding.
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re_single_lf = re.compile(b'(^|[^\r])\n', re.MULTILINE)
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newlinestr = {b'\r\n': b'CRLF', b'\r': b'CR'}
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filterstr = {b'\r\n': b'clever', b'\r': b'mac'}
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def checknewline(s, newline, ui=None, repo=None, filename=None):
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    # warn if already has 'newline' in repository.
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    # it might cause unexpected eol conversion.
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    # see issue 302:
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    #   https://bz.mercurial-scm.org/302
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    if newline in s and ui and filename and repo:
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        ui.warn(
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            _(
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                b'WARNING: %s already has %s line endings\n'
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                b'and does not need EOL conversion by the win32text plugin.\n'
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                b'Before your next commit, please reconsider your '
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                b'encode/decode settings in \nMercurial.ini or %s.\n'
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            )
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            % (filename, newlinestr[newline], repo.vfs.join(b'hgrc'))
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        )
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def dumbdecode(s, cmd, **kwargs):
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    checknewline(s, b'\r\n', **kwargs)
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    # replace single LF to CRLF
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    return re_single_lf.sub(b'\\1\r\n', s)
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def dumbencode(s, cmd):
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    return s.replace(b'\r\n', b'\n')
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def macdumbdecode(s, cmd, **kwargs):
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    checknewline(s, b'\r', **kwargs)
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    return s.replace(b'\n', b'\r')
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def macdumbencode(s, cmd):
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    return s.replace(b'\r', b'\n')
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def cleverdecode(s, cmd, **kwargs):
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    if not stringutil.binary(s):
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        return dumbdecode(s, cmd, **kwargs)
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    return s
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def cleverencode(s, cmd):
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    if not stringutil.binary(s):
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        return dumbencode(s, cmd)
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    return s
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def macdecode(s, cmd, **kwargs):
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    if not stringutil.binary(s):
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        return macdumbdecode(s, cmd, **kwargs)
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    return s
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def macencode(s, cmd):
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    if not stringutil.binary(s):
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        return macdumbencode(s, cmd)
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    return s
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_filters = {
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    b'dumbdecode:': dumbdecode,
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    b'dumbencode:': dumbencode,
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    b'cleverdecode:': cleverdecode,
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    b'cleverencode:': cleverencode,
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    b'macdumbdecode:': macdumbdecode,
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    b'macdumbencode:': macdumbencode,
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    b'macdecode:': macdecode,
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    b'macencode:': macencode,
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}
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def forbidnewline(ui, repo, hooktype, node, newline, **kwargs):
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    halt = False
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    seen = set()
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    # we try to walk changesets in reverse order from newest to
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    # oldest, so that if we see a file multiple times, we take the
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    # newest version as canonical. this prevents us from blocking a
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    # changegroup that contains an unacceptable commit followed later
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    # by a commit that fixes the problem.
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    tip = repo[b'tip']
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    for rev in pycompat.xrange(
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        repo.changelog.tiprev(), repo[node].rev() - 1, -1
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    ):
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        c = repo[rev]
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        for f in c.files():
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            if f in seen or f not in tip or f not in c:
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                continue
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            seen.add(f)
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            data = c[f].data()
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            if not stringutil.binary(data) and newline in data:
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                if not halt:
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                    ui.warn(
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                        _(
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                            b'attempt to commit or push text file(s) '
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                            b'using %s line endings\n'
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                        )
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                        % newlinestr[newline]
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                    )
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                ui.warn(_(b'in %s: %s\n') % (short(c.node()), f))
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                halt = True
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    if halt and hooktype == b'pretxnchangegroup':
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        crlf = newlinestr[newline].lower()
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        filter = filterstr[newline]
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        ui.warn(
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            _(
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                b'\nTo prevent this mistake in your local repository,\n'
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                b'add to Mercurial.ini or .hg/hgrc:\n'
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                b'\n'
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                b'[hooks]\n'
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                b'pretxncommit.%s = python:hgext.win32text.forbid%s\n'
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                b'\n'
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                b'and also consider adding:\n'
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                b'\n'
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                b'[extensions]\n'
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                b'win32text =\n'
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                b'[encode]\n'
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                b'** = %sencode:\n'
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                b'[decode]\n'
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                b'** = %sdecode:\n'
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            )
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            % (crlf, crlf, filter, filter)
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        )
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    return halt
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def forbidcrlf(ui, repo, hooktype, node, **kwargs):
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    return forbidnewline(ui, repo, hooktype, node, b'\r\n', **kwargs)
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def forbidcr(ui, repo, hooktype, node, **kwargs):
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    return forbidnewline(ui, repo, hooktype, node, b'\r', **kwargs)
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def reposetup(ui, repo):
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    if not repo.local():
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        return
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    for name, fn in pycompat.iteritems(_filters):
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        repo.adddatafilter(name, fn)
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def extsetup(ui):
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    # deprecated config: win32text.warn
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    if ui.configbool(b'win32text', b'warn'):
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        ui.warn(
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            _(
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                b"win32text is deprecated: "
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                b"https://mercurial-scm.org/wiki/Win32TextExtension\n"
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            )
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        )