hgext/eol.py
author Georg Brandl <georg@python.org>
Thu, 21 Oct 2010 17:02:08 +0200
branchstable
changeset 12802 c82cd7b08158
parent 12308 2ae4d6c31dcc
child 12974 75e4fade4ad9
child 12975 278e3c9b939e
permissions -rw-r--r--
eol: add missing word in module docstring
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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`` to 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, match
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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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   141
        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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   149
    #print "reposetup for", repo.root
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   150
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   151
    if not repo.local():
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        return
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   153
    for name, fn in filters.iteritems():
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   154
        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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   160
        _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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parents:
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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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parents:
diff changeset
   183
            else:
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diff changeset
   184
                self._encode['NATIVE'] = 'to-lf'
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parents:
diff changeset
   185
0bb67503ad4b eol: extension for managing file EOLs
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diff changeset
   186
            for pattern, style in eol.items('patterns'):
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parents:
diff changeset
   187
                key = style.upper()
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diff changeset
   188
                try:
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   189
                    self.ui.setconfig('decode', pattern, self._decode[key])
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diff changeset
   190
                    self.ui.setconfig('encode', pattern, self._encode[key])
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parents:
diff changeset
   191
                except KeyError:
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parents:
diff changeset
   192
                    self.ui.warn(_("ignoring unknown EOL style '%s' from %s\n")
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parents:
diff changeset
   193
                                 % (style, eol.source('patterns', pattern)))
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parents:
diff changeset
   194
0bb67503ad4b eol: extension for managing file EOLs
Martin Geisler <mg@lazybytes.net>
parents:
diff changeset
   195
            include = []
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parents:
diff changeset
   196
            exclude = []
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parents:
diff changeset
   197
            for pattern, style in eol.items('patterns'):
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parents:
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
0bb67503ad4b eol: extension for managing file EOLs
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parents:
diff changeset
   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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parents:
diff changeset
   206
            return match.match(self.root, '', [], include, exclude)
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parents:
diff changeset
   207
0bb67503ad4b eol: extension for managing file EOLs
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parents:
diff changeset
   208
        def _hgcleardirstate(self):
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parents:
diff changeset
   209
            self._eolfile = self.readhgeol() or self.readhgeol('tip')
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parents:
diff changeset
   210
0bb67503ad4b eol: extension for managing file EOLs
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parents:
diff changeset
   211
            if not self._eolfile:
0bb67503ad4b eol: extension for managing file EOLs
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parents:
diff changeset
   212
                self._eolfile = util.never
0bb67503ad4b eol: extension for managing file EOLs
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parents:
diff changeset
   213
                return
0bb67503ad4b eol: extension for managing file EOLs
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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
Martin Geisler <mg@lazybytes.net>
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
Martin Geisler <mg@lazybytes.net>
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()