hgext/win32text.py
author Mike Hommey <mh@glandium.org>
Thu, 16 Oct 2014 15:54:53 +0900
changeset 22960 7c13c9404c2c
parent 20624 23146e4d9cee
child 25186 80c5b2666a96
permissions -rw-r--r--
changegroup: use a copy of hookargs when invoking the changegroup hook addchangegroup creates a runhook function that is used to invoke the changegroup and incoming hooks, but at the time the function is called, the contents of hookargs associated with the transaction may have been modified externally. For instance, bundle2 code affects it with obsolescence markers and bookmarks info. It also creates problems when a single transaction is used with multiple changegroups added (as per an upcoming change), whereby the contents of hookargs are that of after adding a latter changegroup when invoking the hook for the first changegroup.
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 mercurial.i18n import _
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from mercurial.node import short
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from mercurial import util
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import re
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testedwith = 'internal'
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# regexp for single LF without CR preceding.
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re_single_lf = re.compile('(^|[^\r])\n', re.MULTILINE)
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newlinestr = {'\r\n': 'CRLF', '\r': 'CR'}
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filterstr = {'\r\n': 'clever', '\r': '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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    #   http://mercurial.selenic.com/bts/issue302
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    if newline in s and ui and filename and repo:
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        ui.warn(_('WARNING: %s already has %s line endings\n'
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                  'and does not need EOL conversion by the win32text plugin.\n'
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                  'Before your next commit, please reconsider your '
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                  'encode/decode settings in \nMercurial.ini or %s.\n') %
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                (filename, newlinestr[newline], repo.join('hgrc')))
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def dumbdecode(s, cmd, **kwargs):
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    checknewline(s, '\r\n', **kwargs)
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    # replace single LF to CRLF
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    return re_single_lf.sub('\\1\r\n', s)
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def dumbencode(s, cmd):
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    return s.replace('\r\n', '\n')
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def macdumbdecode(s, cmd, **kwargs):
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    checknewline(s, '\r', **kwargs)
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    return s.replace('\n', '\r')
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def macdumbencode(s, cmd):
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    return s.replace('\r', '\n')
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def cleverdecode(s, cmd, **kwargs):
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    if not util.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 util.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 util.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 util.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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    'dumbdecode:': dumbdecode,
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    'dumbencode:': dumbencode,
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    'cleverdecode:': cleverdecode,
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    'cleverencode:': cleverencode,
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    'macdumbdecode:': macdumbdecode,
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    'macdumbencode:': macdumbencode,
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    'macdecode:': macdecode,
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    '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['tip']
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    for rev in xrange(len(repo) - 1, repo[node].rev() - 1, -1):
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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 util.binary(data) and newline in data:
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                if not halt:
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                    ui.warn(_('attempt to commit or push text file(s) '
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                              'using %s line endings\n') %
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                              newlinestr[newline])
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                ui.warn(_('in %s: %s\n') % (short(c.node()), f))
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                halt = True
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    if halt and hooktype == 'pretxnchangegroup':
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        crlf = newlinestr[newline].lower()
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        filter = filterstr[newline]
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        ui.warn(_('\nTo prevent this mistake in your local repository,\n'
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                  'add to Mercurial.ini or .hg/hgrc:\n'
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                  '\n'
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                  '[hooks]\n'
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                  'pretxncommit.%s = python:hgext.win32text.forbid%s\n'
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                  '\n'
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                  'and also consider adding:\n'
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                  '\n'
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                  '[extensions]\n'
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                  'win32text =\n'
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                  '[encode]\n'
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                  '** = %sencode:\n'
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                  '[decode]\n'
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                  '** = %sdecode:\n') % (crlf, crlf, filter, filter))
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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, '\r\n', **kwargs)
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def forbidcr(ui, repo, hooktype, node, **kwargs):
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    return forbidnewline(ui, repo, hooktype, node, '\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 _filters.iteritems():
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        repo.adddatafilter(name, fn)
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def extsetup(ui):
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    if ui.configbool('win32text', 'warn', True):
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        ui.warn(_("win32text is deprecated: "
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                  "http://mercurial.selenic.com/wiki/Win32TextExtension\n"))