win32text: give deprecation warning

Users need to migrate to the EOL extension for various reasons.

Instructions for disabling the warning will be added to the
extension's wiki page.

hgext/win32text.py

@@ -1,166 +1,170 b''
 # win32text.py - LF <-> CRLF/CR translation utilities for Windows/Mac users
 #
 #  Copyright 2005, 2007-2009 Matt Mackall <[e-mail]> 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
 
   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 mercurial.i18n import _
 from mercurial.node import short
 from mercurial import util
 import re
 
 # 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:
     #   http://mercurial.selenic.com/bts/issue302
     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.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 util.binary(s):
         return dumbdecode(s, cmd, **kwargs)
     return s
 
 def cleverencode(s, cmd):
     if not util.binary(s):
         return dumbencode(s, cmd)
     return s
 
 def macdecode(s, cmd, **kwargs):
     if not util.binary(s):
         return macdumbdecode(s, cmd, **kwargs)
     return s
 
 def macencode(s, cmd):
     if not util.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 xrange(len(repo)-1, 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 util.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):
+    if ui.configbool('win32text', 'warn', True):
+        ui.warn(_("win32text is deprecated: "
+                  "http://mercurial.selenic.com/wiki/Win32TextExtension\n"))