ext/rest.py
author Aurelien Campeas <aurelien.campeas@logilab.fr>
Wed, 03 Jul 2013 14:33:27 +0200
branchstable
changeset 9130 0f1504a9fb51
parent 8852 59a29405688c
child 9322 2dae5bf5ea68
permissions -rw-r--r--
[constraint] more robust unicity constraint failures reporting for end-users Postgres or Sqlserver have limits on the index names (around resp. 64 and 128 characters). Because `logilab.database` encodes the `unique together` constraint rtypes in the index names, we sometimes get truncated index names, from which it is impossible to retrieve all rtypes. In the long run, the way such index are named should be changed. In the short term, we try to reduce the end-user confusion resulting from this design flaw: * in source/native, the regex filtering ``IntegrityError`` message does not impose an `_idx` suffix, which indeed may be absent (the result being an UI message that resembles a catastrophic failure), * also we avoid including a trailing " (double quote) from the error message * in entities/adapters, the well-named ``IUserFriendly`` adapter is made a bit smarter about how to handle missing rtypes. * the adapter also always produces a global message explaining the issue (and the fact that sometimes, the user is not shown all the relevant info) * i18n is updated Closes #2793789
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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# copyright 2003-2011 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
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# contact http://www.logilab.fr/ -- mailto:contact@logilab.fr
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#
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# This file is part of CubicWeb.
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#
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# CubicWeb is free software: you can redistribute it and/or modify it under the
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# terms of the GNU Lesser General Public License as published by the Free
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# Software Foundation, either version 2.1 of the License, or (at your option)
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# any later version.
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#
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# CubicWeb is distributed in the hope that it will be useful, but WITHOUT
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# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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# FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more
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# details.
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#
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# You should have received a copy of the GNU Lesser General Public License along
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# with CubicWeb.  If not, see <http://www.gnu.org/licenses/>.
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"""rest publishing functions
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contains some functions and setup of docutils for cubicweb. Provides the
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following ReST directives:
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* `eid`, create link to entity in the repository by their eid
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* `card`, create link to card entity in the repository by their wikiid
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  (proposing to create it when the refered card doesn't exist yet)
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* `winclude`, reference to a web documentation file (in wdoc/ directories)
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* `sourcecode` (if pygments is installed), source code colorization
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"""
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__docformat__ = "restructuredtext en"
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from cStringIO import StringIO
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from itertools import chain
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from logging import getLogger
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from os.path import join
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from urlparse import urlsplit
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from docutils import statemachine, nodes, utils, io
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from docutils.core import Publisher
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from docutils.parsers.rst import Parser, states, directives
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from docutils.parsers.rst.roles import register_canonical_role, set_classes
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from logilab.mtconverter import ESC_UCAR_TABLE, ESC_CAR_TABLE, xml_escape
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from cubicweb import UnknownEid
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from cubicweb.ext.html4zope import Writer
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from cubicweb.web.views import vid_from_rset # XXX better not to import c.w.views here...
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0
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# We provide our own parser as an attempt to get rid of
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# state machine reinstanciation
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import re
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# compile states.Body patterns
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for k, v in states.Body.patterns.items():
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    if isinstance(v, str):
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        states.Body.patterns[k] = re.compile(v)
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# register ReStructured Text mimetype / extensions
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import mimetypes
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mimetypes.add_type('text/rest', '.rest')
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mimetypes.add_type('text/rest', '.rst')
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LOGGER = getLogger('cubicweb.rest')
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def eid_reference_role(role, rawtext, text, lineno, inliner,
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                       options={}, content=[]):
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    try:
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        try:
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            eid_num, rest = text.split(u':', 1)
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        except ValueError:
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            eid_num, rest = text, '#'+text
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        eid_num = int(eid_num)
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        if eid_num < 0:
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            raise ValueError
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    except ValueError:
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        msg = inliner.reporter.error(
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            'EID number must be a positive number; "%s" is invalid.'
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            % text, line=lineno)
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        prb = inliner.problematic(rawtext, rawtext, msg)
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        return [prb], [msg]
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    # Base URL mainly used by inliner.pep_reference; so this is correct:
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    context = inliner.document.settings.context
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    try:
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        refedentity = context._cw.entity_from_eid(eid_num)
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    except UnknownEid:
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        ref = '#'
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        rest += u' ' + context._cw._('(UNEXISTANT EID)')
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    else:
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        ref = refedentity.absolute_url()
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    set_classes(options)
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    return [nodes.reference(rawtext, utils.unescape(rest), refuri=ref,
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                            **options)], []
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def rql_role(role, rawtext, text, lineno, inliner, options={}, content=[]):
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    """:rql:`<rql-expr>` or :rql:`<rql-expr>:<vid>`
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    Example: :rql:`Any X,Y WHERE X is CWUser, X login Y:table`
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    Replace the directive with the output of applying the view to the resultset
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    returned by the query.
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    "X eid %(userid)s" can be used in the RQL query for this query will be
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    executed with the argument {'userid': _cw.user.eid}.
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    """
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    _cw = inliner.document.settings.context._cw
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    text = text.strip()
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    if ':' in text:
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        rql, vid = text.rsplit(u':', 1)
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        rql = rql.strip()
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    else:
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        rql, vid = text, None
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    _cw.ensure_ro_rql(rql)
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   118
    try:
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   119
        rset = _cw.execute(rql, {'userid': _cw.user.eid})
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   120
        if rset:
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   121
            if vid is None:
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   122
                vid = vid_from_rset(_cw, rset, _cw.vreg.schema)
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   123
        else:
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   124
            vid = 'noresult'
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   125
        view = _cw.vreg['views'].select(vid, _cw, rset=rset)
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   126
        content = view.render()
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358d8bed9626 [toward-py3k] rewrite to "except AnException as exc:" (part of #2711624)
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   127
    except Exception as exc:
7732
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   128
        content = 'an error occured while interpreting this rql directive: %r' % exc
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   129
    set_classes(options)
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   130
    return [nodes.raw('', content, format='html')], []
0
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   131
8852
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   132
def bookmark_role(role, rawtext, text, lineno, inliner, options={}, content=[]):
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   133
    """:bookmark:`<bookmark-eid>` or :bookmark:`<eid>:<vid>`
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   134
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   135
    Example: :bookmark:`1234:table`
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diff changeset
   136
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   137
    Replace the directive with the output of applying the view to the resultset
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   138
    returned by the query stored in the bookmark. By default, the view is the one
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   139
    stored in the bookmark, but it can be overridden by the directive as in the
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diff changeset
   140
    example above.
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diff changeset
   141
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   142
    "X eid %(userid)s" can be used in the RQL query stored in the Bookmark, for
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diff changeset
   143
    this query will be executed with the argument {'userid': _cw.user.eid}.
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diff changeset
   144
    """
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   145
    _cw = inliner.document.settings.context._cw
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diff changeset
   146
    text = text.strip()
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   147
    try:
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   148
        if ':' in text:
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   149
            eid, vid = text.rsplit(u':', 1)
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   150
            eid = int(eid)
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diff changeset
   151
        else:
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   152
            eid, vid = int(text), None
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diff changeset
   153
    except ValueError:
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   154
        msg = inliner.reporter.error(
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diff changeset
   155
            'EID number must be a positive number; "%s" is invalid.'
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diff changeset
   156
            % text, line=lineno)
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diff changeset
   157
        prb = inliner.problematic(rawtext, rawtext, msg)
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diff changeset
   158
        return [prb], [msg]
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diff changeset
   159
    try:
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diff changeset
   160
        bookmark = _cw.entity_from_eid(eid)
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diff changeset
   161
    except UnknownEid:
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diff changeset
   162
        msg = inliner.reporter.error('Unknown EID %s.' % text, line=lineno)
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diff changeset
   163
        prb = inliner.problematic(rawtext, rawtext, msg)
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diff changeset
   164
        return [prb], [msg]
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diff changeset
   165
    try:
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diff changeset
   166
        params = dict(_cw.url_parse_qsl(urlsplit(bookmark.path).query))
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diff changeset
   167
        rql = params['rql']
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diff changeset
   168
        if vid is None:
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diff changeset
   169
            vid = params.get('vid')
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diff changeset
   170
    except (ValueError, KeyError), exc:
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diff changeset
   171
        msg = inliner.reporter.error('Could not parse bookmark path %s [%s].'
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diff changeset
   172
                                     % (bookmark.path, exc), line=lineno)
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diff changeset
   173
        prb = inliner.problematic(rawtext, rawtext, msg)
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diff changeset
   174
        return [prb], [msg]
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diff changeset
   175
    try:
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diff changeset
   176
        rset = _cw.execute(rql, {'userid': _cw.user.eid})
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diff changeset
   177
        if rset:
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diff changeset
   178
            if vid is None:
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diff changeset
   179
                vid = vid_from_rset(_cw, rset, _cw.vreg.schema)
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diff changeset
   180
        else:
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diff changeset
   181
            vid = 'noresult'
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diff changeset
   182
        view = _cw.vreg['views'].select(vid, _cw, rset=rset)
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diff changeset
   183
        content = view.render()
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diff changeset
   184
    except Exception, exc:
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diff changeset
   185
        content = 'An error occured while interpreting directive bookmark: %r' % exc
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diff changeset
   186
    set_classes(options)
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diff changeset
   187
    return [nodes.raw('', content, format='html')], []
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diff changeset
   188
0
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diff changeset
   189
def winclude_directive(name, arguments, options, content, lineno,
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diff changeset
   190
                       content_offset, block_text, state, state_machine):
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diff changeset
   191
    """Include a reST file as part of the content of this reST file.
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diff changeset
   192
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   193
    same as standard include directive but using config.locate_doc_resource to
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diff changeset
   194
    get actual file to include.
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diff changeset
   195
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   196
    Most part of this implementation is copied from `include` directive defined
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diff changeset
   197
    in `docutils.parsers.rst.directives.misc`
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diff changeset
   198
    """
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diff changeset
   199
    context = state.document.settings.context
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5b878b02b67b [rest] cleanup, avoid deprecation warning
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diff changeset
   200
    cw = context._cw
0
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diff changeset
   201
    source = state_machine.input_lines.source(
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diff changeset
   202
        lineno - state_machine.input_offset - 1)
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diff changeset
   203
    #source_dir = os.path.dirname(os.path.abspath(source))
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diff changeset
   204
    fid = arguments[0]
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diff changeset
   205
    for lang in chain((cw.lang, cw.vreg.property_value('ui.language')),
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diff changeset
   206
                      cw.vreg.config.available_languages()):
0
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diff changeset
   207
        rid = '%s_%s.rst' % (fid, lang)
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diff changeset
   208
        resourcedir = cw.vreg.config.locate_doc_file(rid)
0
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diff changeset
   209
        if resourcedir:
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diff changeset
   210
            break
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diff changeset
   211
    else:
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diff changeset
   212
        severe = state_machine.reporter.severe(
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diff changeset
   213
              'Problems with "%s" directive path:\nno resource matching %s.'
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diff changeset
   214
              % (name, fid),
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diff changeset
   215
              nodes.literal_block(block_text, block_text), line=lineno)
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diff changeset
   216
        return [severe]
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diff changeset
   217
    path = join(resourcedir, rid)
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diff changeset
   218
    encoding = options.get('encoding', state.document.settings.input_encoding)
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diff changeset
   219
    try:
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diff changeset
   220
        state.document.settings.record_dependencies.add(path)
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diff changeset
   221
        include_file = io.FileInput(
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diff changeset
   222
            source_path=path, encoding=encoding,
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diff changeset
   223
            error_handler=state.document.settings.input_encoding_error_handler,
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diff changeset
   224
            handle_io_errors=None)
8695
358d8bed9626 [toward-py3k] rewrite to "except AnException as exc:" (part of #2711624)
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parents: 7879
diff changeset
   225
    except IOError as error:
0
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diff changeset
   226
        severe = state_machine.reporter.severe(
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diff changeset
   227
              'Problems with "%s" directive path:\n%s: %s.'
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diff changeset
   228
              % (name, error.__class__.__name__, error),
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              nodes.literal_block(block_text, block_text), line=lineno)
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        return [severe]
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    try:
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        include_text = include_file.read()
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    except UnicodeError as error:
0
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        severe = state_machine.reporter.severe(
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              'Problem with "%s" directive:\n%s: %s'
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              % (name, error.__class__.__name__, error),
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              nodes.literal_block(block_text, block_text), line=lineno)
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        return [severe]
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    if 'literal' in options:
0
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        literal_block = nodes.literal_block(include_text, include_text,
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                                            source=path)
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        literal_block.line = 1
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        return literal_block
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    else:
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        include_lines = statemachine.string2lines(include_text,
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                                                  convert_whitespace=1)
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        state_machine.insert_input(include_lines, path)
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        return []
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winclude_directive.arguments = (1, 0, 1)
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winclude_directive.options = {'literal': directives.flag,
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                              'encoding': directives.encoding}
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try:
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    from pygments import highlight
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   256
    from pygments.lexers import get_lexer_by_name
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9aae456abab5 [pylint] fix pylint detected errors and tweak it so that pylint -E will be much less verbose next time (+ update some copyrights on the way)
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   257
    from pygments.formatters.html import HtmlFormatter
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   258
except ImportError:
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    pygments_directive = None
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else:
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    _PYGMENTS_FORMATTER = HtmlFormatter()
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   262
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   263
    def pygments_directive(name, arguments, options, content, lineno,
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   264
                           content_offset, block_text, state, state_machine):
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   265
        try:
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   266
            lexer = get_lexer_by_name(arguments[0])
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   267
        except ValueError:
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            # no lexer found
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            lexer = get_lexer_by_name('text')
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        parsed = highlight(u'\n'.join(content), lexer, _PYGMENTS_FORMATTER)
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   271
        # don't fail if no context set on the sourcecode directive
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        try:
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            context = state.document.settings.context
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   274
            context._cw.add_css('pygments.css')
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   275
        except AttributeError:
7577
9892937d9041 [all] remove pattern "try: function() except AttributeError: pass" (closes #1787966)
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   276
            # used outside cubicweb XXX use hasattr instead
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            pass
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diff changeset
   278
        return [nodes.raw('', parsed, format='html')]
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   279
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   280
    pygments_directive.arguments = (1, 0, 1)
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   281
    pygments_directive.content = 1
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   282
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   283
0
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class CubicWebReSTParser(Parser):
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    """The (customized) reStructuredText parser."""
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   286
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    def __init__(self):
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   288
        self.initial_state = 'Body'
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   289
        self.state_classes = states.state_classes
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   290
        self.inliner = states.Inliner()
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   291
        self.statemachine = states.RSTStateMachine(
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              state_classes=self.state_classes,
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   293
              initial_state=self.initial_state,
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   294
              debug=0)
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   295
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   296
    def parse(self, inputstring, document):
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   297
        """Parse `inputstring` and populate `document`, a document tree."""
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   298
        self.setup_parse(inputstring, document)
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diff changeset
   299
        inputlines = statemachine.string2lines(inputstring,
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   300
                                               convert_whitespace=1)
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diff changeset
   301
        self.statemachine.run(inputlines, document, inliner=self.inliner)
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   302
        self.finish_parse()
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diff changeset
   303
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   304
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e27d23f875c6 custom rest publisher instead of using rest_publish. Avoid to keep a ref on the latest context
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diff changeset
   305
# XXX docutils keep a ref on context, can't find a correct way to remove it
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diff changeset
   306
class CWReSTPublisher(Publisher):
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diff changeset
   307
    def __init__(self, context, settings, **kwargs):
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diff changeset
   308
        Publisher.__init__(self, **kwargs)
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diff changeset
   309
        self.set_components('standalone', 'restructuredtext', 'pseudoxml')
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diff changeset
   310
        self.process_programmatic_settings(None, settings, None)
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diff changeset
   311
        self.settings.context = context
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   312
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diff changeset
   313
0
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diff changeset
   314
def rest_publish(context, data):
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diff changeset
   315
    """publish a string formatted as ReStructured Text to HTML
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a1ca676294f0 don't use a singleton rest parser which may leads to concurrency bugs
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diff changeset
   316
0
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diff changeset
   317
    :type context: a cubicweb application object
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diff changeset
   318
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   319
    :type data: str
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   320
    :param data: some ReST text
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parents:
diff changeset
   321
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diff changeset
   322
    :rtype: unicode
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diff changeset
   323
    :return:
6109
47d9c0e0f7b7 integrate Celso's work on translation file: proper/complete spanish translation, fixed some typos in french translation, occured -> occurred fix in various places
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parents: 5424
diff changeset
   324
      the data formatted as HTML or the original data if an error occurred
0
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parents:
diff changeset
   325
    """
3418
7b49fa7e942d [api] use _cw, cw_row, cw_col, cw_rset etc.
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diff changeset
   326
    req = context._cw
0
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diff changeset
   327
    if isinstance(data, unicode):
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diff changeset
   328
        encoding = 'unicode'
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f178182b1305 actually close #344401 by removing unprintable characters
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parents: 1977
diff changeset
   329
        # remove unprintable characters unauthorized in xml
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diff changeset
   330
        data = data.translate(ESC_UCAR_TABLE)
0
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parents:
diff changeset
   331
    else:
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diff changeset
   332
        encoding = req.encoding
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f178182b1305 actually close #344401 by removing unprintable characters
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parents: 1977
diff changeset
   333
        # remove unprintable characters unauthorized in xml
f178182b1305 actually close #344401 by removing unprintable characters
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parents: 1977
diff changeset
   334
        data = data.translate(ESC_CAR_TABLE)
0
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parents:
diff changeset
   335
    settings = {'input_encoding': encoding, 'output_encoding': 'unicode',
4771
e27d23f875c6 custom rest publisher instead of using rest_publish. Avoid to keep a ref on the latest context
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diff changeset
   336
                'warning_stream': StringIO(),
6275
20f30e01ae59 [ReST] settings update: add traceback=True to avoid sys.exit, and set stylesheet to None since we don't care about it and that may makes docutils stupidly fail according to the cwd at import time...
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parents: 6109
diff changeset
   337
                'traceback': True, # don't sys.exit
20f30e01ae59 [ReST] settings update: add traceback=True to avoid sys.exit, and set stylesheet to None since we don't care about it and that may makes docutils stupidly fail according to the cwd at import time...
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parents: 6109
diff changeset
   338
                'stylesheet': None, # don't try to embed stylesheet (may cause
20f30e01ae59 [ReST] settings update: add traceback=True to avoid sys.exit, and set stylesheet to None since we don't care about it and that may makes docutils stupidly fail according to the cwd at import time...
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parents: 6109
diff changeset
   339
                                    # obscure bug due to docutils computing
20f30e01ae59 [ReST] settings update: add traceback=True to avoid sys.exit, and set stylesheet to None since we don't care about it and that may makes docutils stupidly fail according to the cwd at import time...
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parents: 6109
diff changeset
   340
                                    # relative path according to the directory
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parents: 6109
diff changeset
   341
                                    # used *at import time*
0
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parents:
diff changeset
   342
                # dunno what's the max, severe is 4, and we never want a crash
6275
20f30e01ae59 [ReST] settings update: add traceback=True to avoid sys.exit, and set stylesheet to None since we don't care about it and that may makes docutils stupidly fail according to the cwd at import time...
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diff changeset
   343
                # (though try/except may be a better option...). May be the
20f30e01ae59 [ReST] settings update: add traceback=True to avoid sys.exit, and set stylesheet to None since we don't care about it and that may makes docutils stupidly fail according to the cwd at import time...
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diff changeset
   344
                # above traceback option will avoid this?
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diff changeset
   345
                'halt_level': 10,
0
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parents:
diff changeset
   346
                }
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diff changeset
   347
    if context:
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parents:
diff changeset
   348
        if hasattr(req, 'url'):
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diff changeset
   349
            base_url = req.url()
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   350
        elif hasattr(context, 'absolute_url'):
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   351
            base_url = context.absolute_url()
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   352
        else:
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   353
            base_url = req.base_url()
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   354
    else:
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   355
        base_url = None
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   356
    try:
4771
e27d23f875c6 custom rest publisher instead of using rest_publish. Avoid to keep a ref on the latest context
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 4769
diff changeset
   357
        pub = CWReSTPublisher(context, settings,
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diff changeset
   358
                              parser=CubicWebReSTParser(),
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diff changeset
   359
                              writer=Writer(base_url=base_url),
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parents: 4769
diff changeset
   360
                              source_class=io.StringInput,
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parents: 4769
diff changeset
   361
                              destination_class=io.StringOutput)
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parents: 4769
diff changeset
   362
        pub.set_source(data)
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parents: 4769
diff changeset
   363
        pub.set_destination()
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parents: 4769
diff changeset
   364
        res = pub.publish(enable_exit_status=None)
e27d23f875c6 custom rest publisher instead of using rest_publish. Avoid to keep a ref on the latest context
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parents: 4769
diff changeset
   365
        # necessary for proper garbage collection, else a ref is kept somewhere in docutils...
e27d23f875c6 custom rest publisher instead of using rest_publish. Avoid to keep a ref on the latest context
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parents: 4769
diff changeset
   366
        del pub.settings.context
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parents: 4769
diff changeset
   367
        return res
0
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diff changeset
   368
    except Exception:
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diff changeset
   369
        LOGGER.exception('error while publishing ReST text')
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parents:
diff changeset
   370
        if not isinstance(data, unicode):
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parents:
diff changeset
   371
            data = unicode(data, encoding, 'replace')
2312
af4d8f75c5db use xml_escape
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2311
diff changeset
   372
        return xml_escape(req._('error while publishing ReST text')
0
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parents:
diff changeset
   373
                           + '\n\n' + data)
4118
8a9a00a9405c quick and dirty fix trying to avoid rest directive conflicts when using sphinx (which seems to import the code)
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2680
diff changeset
   374
8a9a00a9405c quick and dirty fix trying to avoid rest directive conflicts when using sphinx (which seems to import the code)
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2680
diff changeset
   375
8a9a00a9405c quick and dirty fix trying to avoid rest directive conflicts when using sphinx (which seems to import the code)
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parents: 2680
diff changeset
   376
_INITIALIZED = False
8a9a00a9405c quick and dirty fix trying to avoid rest directive conflicts when using sphinx (which seems to import the code)
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parents: 2680
diff changeset
   377
def cw_rest_init():
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parents: 2680
diff changeset
   378
    global _INITIALIZED
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parents: 2680
diff changeset
   379
    if _INITIALIZED:
8a9a00a9405c quick and dirty fix trying to avoid rest directive conflicts when using sphinx (which seems to import the code)
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parents: 2680
diff changeset
   380
        return
8a9a00a9405c quick and dirty fix trying to avoid rest directive conflicts when using sphinx (which seems to import the code)
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2680
diff changeset
   381
    _INITIALIZED = True
8a9a00a9405c quick and dirty fix trying to avoid rest directive conflicts when using sphinx (which seems to import the code)
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2680
diff changeset
   382
    register_canonical_role('eid', eid_reference_role)
6938
6c1a960735f5 add a rql directive to restructuredtext
Nicolas Chauvat <nicolas.chauvat@logilab.fr>
parents: 6275
diff changeset
   383
    register_canonical_role('rql', rql_role)
8852
59a29405688c [ext/rest] add directive bookmark to rest (closes #2545595)
Nicolas Chauvat <nicolas.chauvat@logilab.fr>
parents: 8711
diff changeset
   384
    register_canonical_role('bookmark', bookmark_role)
4118
8a9a00a9405c quick and dirty fix trying to avoid rest directive conflicts when using sphinx (which seems to import the code)
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2680
diff changeset
   385
    directives.register_directive('winclude', winclude_directive)
8a9a00a9405c quick and dirty fix trying to avoid rest directive conflicts when using sphinx (which seems to import the code)
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2680
diff changeset
   386
    if pygments_directive is not None:
8a9a00a9405c quick and dirty fix trying to avoid rest directive conflicts when using sphinx (which seems to import the code)
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2680
diff changeset
   387
        directives.register_directive('sourcecode', pygments_directive)