hgext/eol.py
author Steve Borho <steve@borho.org>
Wed, 15 Sep 2010 17:46:51 -0500
branchstable
changeset 12307 0852da25a31b
parent 11249 0bb67503ad4b
child 12308 2ae4d6c31dcc
permissions -rw-r--r--
eol: setup the repo.ui in reposetup() This fixes problems some have reported using the eol extension together with TortoiseHg. It ensures the ui associated with the repository has the preupdate.eol hook configured.
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"""automatically manage newlines in repository files
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This extension allows you to manage the type of line endings (CRLF or
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LF) that are used in the repository and in the local working
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directory. That way you can get CRLF line endings on Windows and LF on
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Unix/Mac, thereby letting everybody use their OS native line endings.
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The extension reads its configuration from a versioned ``.hgeol``
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configuration file every time you run an ``hg`` command. The
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``.hgeol`` file use the same syntax as all other Mercurial
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configuration files. It uses two sections, ``[patterns]`` and
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``[repository]``.
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The ``[patterns]`` section specifies the line endings used in the
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working directory. The format is specified by a file pattern. The
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first match is used, so put more specific patterns first. The
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available line endings are ``LF``, ``CRLF``, and ``BIN``.
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Files with the declared format of ``CRLF`` or ``LF`` are always
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checked out in that format and files declared to be binary (``BIN``)
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are left unchanged. Additionally, ``native`` is an alias for the
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platform's default line ending: ``LF`` on Unix (including Mac OS X)
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and ``CRLF`` on Windows. Note that ``BIN`` (do nothing to line
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endings) is Mercurial's default behaviour; it is only needed if you
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need to override a later, more general pattern.
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The optional ``[repository]`` section specifies the line endings to
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use for files stored in the repository. It has a single setting,
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``native``, which determines the storage line endings for files
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declared as ``native`` in the ``[patterns]`` section. It can be set to
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``LF`` or ``CRLF``. The default is ``LF``. For example, this means
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that on Windows, files configured as ``native`` (``CRLF`` by default)
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will be converted to ``LF`` when stored in the repository. Files
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declared as ``LF``, ``CRLF``, or ``BIN`` in the ``[patterns]`` section
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are always stored as-is in the repository.
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Example versioned ``.hgeol`` file::
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  [patterns]
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  **.py = native
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  **.vcproj = CRLF
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  **.txt = native
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  Makefile = LF
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  **.jpg = BIN
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  [repository]
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  native = LF
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The extension uses an optional ``[eol]`` section in your hgrc file
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(not the ``.hgeol`` file) for settings that control the overall
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behavior. There are two settings:
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- ``eol.native`` (default ``os.linesep``) can be set to ``LF`` or
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  ``CRLF`` override the default interpretation of ``native`` for
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  checkout. This can be used with :hg:`archive` on Unix, say, to
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  generate an archive where files have line endings for Windows.
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- ``eol.only-consistent`` (default True) can be set to False to make
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  the extension convert files with inconsistent EOLs. Inconsistent
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  means that there is both ``CRLF`` and ``LF`` present in the file.
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  Such files are normally not touched under the assumption that they
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  have mixed EOLs on purpose.
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See :hg:`help patterns` for more information about the glob patterns
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used.
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"""
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from mercurial.i18n import _
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from mercurial import util, config, extensions, commands, match, cmdutil
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import re, os
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# Matches a lone LF, i.e., one that is not part of CRLF.
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singlelf = re.compile('(^|[^\r])\n')
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# Matches a single EOL which can either be a CRLF where repeated CR
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# are removed or a LF. We do not care about old Machintosh files, so a
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# stray CR is an error.
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eolre = re.compile('\r*\n')
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def inconsistenteol(data):
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    return '\r\n' in data and singlelf.search(data)
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def tolf(s, params, ui, **kwargs):
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    """Filter to convert to LF EOLs."""
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    if util.binary(s):
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        return s
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    if ui.configbool('eol', 'only-consistent', True) and inconsistenteol(s):
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        return s
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    return eolre.sub('\n', s)
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def tocrlf(s, params, ui, **kwargs):
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    """Filter to convert to CRLF EOLs."""
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    if util.binary(s):
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        return s
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    if ui.configbool('eol', 'only-consistent', True) and inconsistenteol(s):
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        return s
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    return eolre.sub('\r\n', s)
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def isbinary(s, params):
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    """Filter to do nothing with the file."""
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    return s
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filters = {
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    'to-lf': tolf,
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    'to-crlf': tocrlf,
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    'is-binary': isbinary,
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}
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def hook(ui, repo, node, hooktype, **kwargs):
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    """verify that files have expected EOLs"""
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    files = set()
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    for rev in xrange(repo[node].rev(), len(repo)):
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        files.update(repo[rev].files())
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    tip = repo['tip']
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    for f in files:
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        if f not in tip:
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            continue
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        for pattern, target in ui.configitems('encode'):
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            if match.match(repo.root, '', [pattern])(f):
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                data = tip[f].data()
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                if target == "to-lf" and "\r\n" in data:
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                    raise util.Abort(_("%s should not have CRLF line endings")
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                                     % f)
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                elif target == "to-crlf" and singlelf.search(data):
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                    raise util.Abort(_("%s should not have LF line endings")
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                                     % f)
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def preupdate(ui, repo, hooktype, parent1, parent2):
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    #print "preupdate for %s: %s -> %s" % (repo.root, parent1, parent2)
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    repo.readhgeol(parent1)
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    return False
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def uisetup(ui):
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    ui.setconfig('hooks', 'preupdate.eol', preupdate)
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   138
def extsetup(ui):
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   139
    try:
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   140
        extensions.find('win32text')
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        raise util.Abort(_("the eol extension is incompatible with the "
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   142
                           "win32text extension"))
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   143
    except KeyError:
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   144
        pass
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   145
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   146
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   147
def reposetup(ui, repo):
12307
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    uisetup(repo.ui)
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    #print "reposetup for", repo.root
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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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   155
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   156
    ui.setconfig('patch', 'eol', 'auto')
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   157
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   158
    class eolrepo(repo.__class__):
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   159
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        _decode = {'LF': 'to-lf', 'CRLF': 'to-crlf', 'BIN': 'is-binary'}
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   161
        _encode = {'LF': 'to-lf', 'CRLF': 'to-crlf', 'BIN': 'is-binary'}
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   162
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   163
        def readhgeol(self, node=None, data=None):
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   164
            if data is None:
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   165
                try:
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   166
                    if node is None:
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   167
                        data = self.wfile('.hgeol').read()
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   168
                    else:
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   169
                        data = self[node]['.hgeol'].data()
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   170
                except (IOError, LookupError):
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   171
                    return None
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   172
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   173
            if self.ui.config('eol', 'native', os.linesep) in ('LF', '\n'):
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   174
                self._decode['NATIVE'] = 'to-lf'
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   175
            else:
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   176
                self._decode['NATIVE'] = 'to-crlf'
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   177
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   178
            eol = config.config()
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   179
            eol.parse('.hgeol', data)
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   180
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   181
            if eol.get('repository', 'native') == 'CRLF':
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   182
                self._encode['NATIVE'] = 'to-crlf'
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diff changeset
   183
            else:
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diff changeset
   184
                self._encode['NATIVE'] = 'to-lf'
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diff changeset
   185
0bb67503ad4b eol: extension for managing file EOLs
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   186
            for pattern, style in eol.items('patterns'):
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   187
                key = style.upper()
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   188
                try:
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   189
                    self.ui.setconfig('decode', pattern, self._decode[key])
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   190
                    self.ui.setconfig('encode', pattern, self._encode[key])
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parents:
diff changeset
   191
                except KeyError:
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diff changeset
   192
                    self.ui.warn(_("ignoring unknown EOL style '%s' from %s\n")
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diff changeset
   193
                                 % (style, eol.source('patterns', pattern)))
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parents:
diff changeset
   194
0bb67503ad4b eol: extension for managing file EOLs
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parents:
diff changeset
   195
            include = []
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diff changeset
   196
            exclude = []
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   197
            for pattern, style in eol.items('patterns'):
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diff changeset
   198
                key = style.upper()
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diff changeset
   199
                if key == 'BIN':
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diff changeset
   200
                    exclude.append(pattern)
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diff changeset
   201
                else:
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diff changeset
   202
                    include.append(pattern)
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diff changeset
   203
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   204
            # This will match the files for which we need to care
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diff changeset
   205
            # about inconsistent newlines.
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diff changeset
   206
            return match.match(self.root, '', [], include, exclude)
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diff changeset
   207
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diff changeset
   208
        def _hgcleardirstate(self):
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diff changeset
   209
            self._eolfile = self.readhgeol() or self.readhgeol('tip')
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diff changeset
   210
0bb67503ad4b eol: extension for managing file EOLs
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parents:
diff changeset
   211
            if not self._eolfile:
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parents:
diff changeset
   212
                self._eolfile = util.never
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diff changeset
   213
                return
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parents:
diff changeset
   214
0bb67503ad4b eol: extension for managing file EOLs
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parents:
diff changeset
   215
            try:
0bb67503ad4b eol: extension for managing file EOLs
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parents:
diff changeset
   216
                cachemtime = os.path.getmtime(self.join("eol.cache"))
0bb67503ad4b eol: extension for managing file EOLs
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parents:
diff changeset
   217
            except OSError:
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parents:
diff changeset
   218
                cachemtime = 0
0bb67503ad4b eol: extension for managing file EOLs
Martin Geisler <mg@lazybytes.net>
parents:
diff changeset
   219
0bb67503ad4b eol: extension for managing file EOLs
Martin Geisler <mg@lazybytes.net>
parents:
diff changeset
   220
            try:
0bb67503ad4b eol: extension for managing file EOLs
Martin Geisler <mg@lazybytes.net>
parents:
diff changeset
   221
                eolmtime = os.path.getmtime(self.wjoin(".hgeol"))
0bb67503ad4b eol: extension for managing file EOLs
Martin Geisler <mg@lazybytes.net>
parents:
diff changeset
   222
            except OSError:
0bb67503ad4b eol: extension for managing file EOLs
Martin Geisler <mg@lazybytes.net>
parents:
diff changeset
   223
                eolmtime = 0
0bb67503ad4b eol: extension for managing file EOLs
Martin Geisler <mg@lazybytes.net>
parents:
diff changeset
   224
0bb67503ad4b eol: extension for managing file EOLs
Martin Geisler <mg@lazybytes.net>
parents:
diff changeset
   225
            if eolmtime > cachemtime:
0bb67503ad4b eol: extension for managing file EOLs
Martin Geisler <mg@lazybytes.net>
parents:
diff changeset
   226
                ui.debug("eol: detected change in .hgeol\n")
0bb67503ad4b eol: extension for managing file EOLs
Martin Geisler <mg@lazybytes.net>
parents:
diff changeset
   227
                # TODO: we could introduce a method for this in dirstate.
0bb67503ad4b eol: extension for managing file EOLs
Martin Geisler <mg@lazybytes.net>
parents:
diff changeset
   228
                wlock = None
0bb67503ad4b eol: extension for managing file EOLs
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parents:
diff changeset
   229
                try:
0bb67503ad4b eol: extension for managing file EOLs
Martin Geisler <mg@lazybytes.net>
parents:
diff changeset
   230
                    wlock = self.wlock()
0bb67503ad4b eol: extension for managing file EOLs
Martin Geisler <mg@lazybytes.net>
parents:
diff changeset
   231
                    for f, e in self.dirstate._map.iteritems():
0bb67503ad4b eol: extension for managing file EOLs
Martin Geisler <mg@lazybytes.net>
parents:
diff changeset
   232
                        self.dirstate._map[f] = (e[0], e[1], -1, 0)
0bb67503ad4b eol: extension for managing file EOLs
Martin Geisler <mg@lazybytes.net>
parents:
diff changeset
   233
                    self.dirstate._dirty = True
0bb67503ad4b eol: extension for managing file EOLs
Martin Geisler <mg@lazybytes.net>
parents:
diff changeset
   234
                    # Touch the cache to update mtime. TODO: are we sure this
0bb67503ad4b eol: extension for managing file EOLs
Martin Geisler <mg@lazybytes.net>
parents:
diff changeset
   235
                    # always enought to update the mtime, or should we write a
0bb67503ad4b eol: extension for managing file EOLs
Martin Geisler <mg@lazybytes.net>
parents:
diff changeset
   236
                    # bit to the file?
0bb67503ad4b eol: extension for managing file EOLs
Martin Geisler <mg@lazybytes.net>
parents:
diff changeset
   237
                    self.opener("eol.cache", "w").close()
0bb67503ad4b eol: extension for managing file EOLs
Martin Geisler <mg@lazybytes.net>
parents:
diff changeset
   238
                finally:
0bb67503ad4b eol: extension for managing file EOLs
Martin Geisler <mg@lazybytes.net>
parents:
diff changeset
   239
                    if wlock is not None:
0bb67503ad4b eol: extension for managing file EOLs
Martin Geisler <mg@lazybytes.net>
parents:
diff changeset
   240
                        wlock.release()
0bb67503ad4b eol: extension for managing file EOLs
Martin Geisler <mg@lazybytes.net>
parents:
diff changeset
   241
0bb67503ad4b eol: extension for managing file EOLs
Martin Geisler <mg@lazybytes.net>
parents:
diff changeset
   242
        def commitctx(self, ctx, error=False):
0bb67503ad4b eol: extension for managing file EOLs
Martin Geisler <mg@lazybytes.net>
parents:
diff changeset
   243
            for f in sorted(ctx.added() + ctx.modified()):
0bb67503ad4b eol: extension for managing file EOLs
Martin Geisler <mg@lazybytes.net>
parents:
diff changeset
   244
                if not self._eolfile(f):
0bb67503ad4b eol: extension for managing file EOLs
Martin Geisler <mg@lazybytes.net>
parents:
diff changeset
   245
                    continue
0bb67503ad4b eol: extension for managing file EOLs
Martin Geisler <mg@lazybytes.net>
parents:
diff changeset
   246
                data = ctx[f].data()
0bb67503ad4b eol: extension for managing file EOLs
Martin Geisler <mg@lazybytes.net>
parents:
diff changeset
   247
                if util.binary(data):
0bb67503ad4b eol: extension for managing file EOLs
Martin Geisler <mg@lazybytes.net>
parents:
diff changeset
   248
                    # We should not abort here, since the user should
0bb67503ad4b eol: extension for managing file EOLs
Martin Geisler <mg@lazybytes.net>
parents:
diff changeset
   249
                    # be able to say "** = native" to automatically
0bb67503ad4b eol: extension for managing file EOLs
Martin Geisler <mg@lazybytes.net>
parents:
diff changeset
   250
                    # have all non-binary files taken care of.
0bb67503ad4b eol: extension for managing file EOLs
Martin Geisler <mg@lazybytes.net>
parents:
diff changeset
   251
                    continue
0bb67503ad4b eol: extension for managing file EOLs
Martin Geisler <mg@lazybytes.net>
parents:
diff changeset
   252
                if inconsistenteol(data):
0bb67503ad4b eol: extension for managing file EOLs
Martin Geisler <mg@lazybytes.net>
parents:
diff changeset
   253
                    raise util.Abort(_("inconsistent newline style "
0bb67503ad4b eol: extension for managing file EOLs
Martin Geisler <mg@lazybytes.net>
parents:
diff changeset
   254
                                       "in %s\n" % f))
0bb67503ad4b eol: extension for managing file EOLs
Martin Geisler <mg@lazybytes.net>
parents:
diff changeset
   255
            return super(eolrepo, self).commitctx(ctx, error)
0bb67503ad4b eol: extension for managing file EOLs
Martin Geisler <mg@lazybytes.net>
parents:
diff changeset
   256
    repo.__class__ = eolrepo
0bb67503ad4b eol: extension for managing file EOLs
Martin Geisler <mg@lazybytes.net>
parents:
diff changeset
   257
    repo._hgcleardirstate()