hgext/win32text.py
author Matt Mackall <mpm@selenic.com>
Thu, 03 May 2012 16:03:08 -0500
branchstable
changeset 16573 5983de86462c
parent 12837 c82056f2509f
child 16743 38caf405d010
permissions -rw-r--r--
bookmarks: catch the proper exception for missing revisions This fixes a regression from 1.7
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
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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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# 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"))