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# win32text.py - LF <-> CRLF translation utilities for Windows users
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#
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# This software may be used and distributed according to the terms
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# of the GNU General Public License, incorporated herein by reference.
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#
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# To perform automatic newline conversion, use:
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#
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# [extensions]
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# hgext.win32text =
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# [encode]
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# ** = cleverencode:
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# [decode]
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# ** = cleverdecode:
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#
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# If not doing conversion, to make sure you do not commit CRLF by accident:
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#
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# [hooks]
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# pretxncommit.crlf = python:hgext.win32text.forbidcrlf
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#
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# To do the same check on a server to prevent CRLF from being pushed or pulled:
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#
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# [hooks]
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# pretxnchangegroup.crlf = python:hgext.win32text.forbidcrlf
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from mercurial.i18n import gettext as _
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from mercurial.node import bin, short
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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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def dumbdecode(s, cmd, ui=None, repo=None, filename=None, **kwargs):
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# warn if already has CRLF in repository.
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# it might cause unexpected eol conversion.
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# see issue 302:
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# http://www.selenic.com/mercurial/bts/issue302
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if '\r\n' in s and ui and filename and repo:
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ui.warn(_('WARNING: %s already has CRLF 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, repo.join('hgrc')))
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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 clevertest(s, cmd):
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if '\0' in s: return False
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return True
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def cleverdecode(s, cmd, **kwargs):
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if clevertest(s, cmd):
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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 clevertest(s, cmd):
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return dumbencode(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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}
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def forbidcrlf(ui, repo, hooktype, node, **kwargs):
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halt = False
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for rev in xrange(repo.changelog.rev(bin(node)), repo.changelog.count()):
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c = repo.changectx(rev)
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for f in c.files():
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if f not in c:
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continue
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data = c[f].data()
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if '\0' not in data and '\r\n' 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 CRLF line endings\n'))
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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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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.crlf = python:hgext.win32text.forbidcrlf\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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'hgext.win32text =\n'
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'[encode]\n'
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'** = cleverencode:\n'
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'[decode]\n'
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'** = cleverdecode:\n'))
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return halt
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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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