ext/rest.py
author Pierre-Yves David <pierre-yves.david@logilab.fr>
Fri, 21 Jun 2013 13:42:19 +0200
changeset 9055 2567b7d04e49
parent 8852 59a29405688c
child 9322 2dae5bf5ea68
permissions -rw-r--r--
[client-connection] add a sessionid property for dbapi compatibility To ease transition from dbapi to repoapi we need the ClientConnection to be as compatible as possible with the dbapi. Adding this method goes in this direction. It'll get deprecated in the deprecation wave that will conclude the repoapi refactoring. related to #2503918
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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    try:
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        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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   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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   140
    example above.
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   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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   143
    this query will be executed with the argument {'userid': _cw.user.eid}.
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   144
    """
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   145
    _cw = inliner.document.settings.context._cw
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   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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   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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5b878b02b67b [rest] cleanup, avoid deprecation warning
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diff changeset
   205
    for lang in chain((cw.lang, cw.vreg.property_value('ui.language')),
5b878b02b67b [rest] cleanup, avoid deprecation warning
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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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parents:
diff changeset
   229
              nodes.literal_block(block_text, block_text), line=lineno)
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diff changeset
   230
        return [severe]
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diff changeset
   231
    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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    from pygments.lexers import get_lexer_by_name
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    from pygments.formatters.html import HtmlFormatter
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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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    def pygments_directive(name, arguments, options, content, lineno,
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                           content_offset, block_text, state, state_machine):
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        try:
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            lexer = get_lexer_by_name(arguments[0])
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        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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        # 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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            context._cw.add_css('pygments.css')
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        except AttributeError:
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            # used outside cubicweb XXX use hasattr instead
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            pass
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        return [nodes.raw('', parsed, format='html')]
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   279
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    pygments_directive.arguments = (1, 0, 1)
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    pygments_directive.content = 1
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0
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class CubicWebReSTParser(Parser):
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    """The (customized) reStructuredText parser."""
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    def __init__(self):
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        self.initial_state = 'Body'
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        self.state_classes = states.state_classes
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        self.inliner = states.Inliner()
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        self.statemachine = states.RSTStateMachine(
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              state_classes=self.state_classes,
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              initial_state=self.initial_state,
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              debug=0)
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    def parse(self, inputstring, document):
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        """Parse `inputstring` and populate `document`, a document tree."""
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        self.setup_parse(inputstring, document)
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        inputlines = statemachine.string2lines(inputstring,
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                                               convert_whitespace=1)
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        self.statemachine.run(inputlines, document, inliner=self.inliner)
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        self.finish_parse()
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   303
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   305
# XXX docutils keep a ref on context, can't find a correct way to remove it
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   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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   313
0
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   314
def rest_publish(context, data):
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   315
    """publish a string formatted as ReStructured Text to HTML
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   316
0
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    :type context: a cubicweb application object
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    :type data: str
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    :param data: some ReST text
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   321
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   322
    :rtype: unicode
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   323
    :return:
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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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   324
      the data formatted as HTML or the original data if an error occurred
0
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diff changeset
   325
    """
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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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   327
    if isinstance(data, unicode):
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   328
        encoding = 'unicode'
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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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diff changeset
   331
    else:
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   332
        encoding = req.encoding
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diff changeset
   333
        # remove unprintable characters unauthorized in xml
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diff changeset
   334
        data = data.translate(ESC_CAR_TABLE)
0
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diff changeset
   335
    settings = {'input_encoding': encoding, 'output_encoding': 'unicode',
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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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diff changeset
   337
                'traceback': True, # don't sys.exit
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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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diff changeset
   339
                                    # obscure bug due to docutils computing
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diff changeset
   340
                                    # relative path according to the directory
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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
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   343
                # (though try/except may be a better option...). May be the
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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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diff changeset
   346
                }
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   347
    if context:
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   348
        if hasattr(req, 'url'):
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   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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parents:
diff changeset
   353
            base_url = req.base_url()
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   354
    else:
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   355
        base_url = None
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   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,
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
   358
                              parser=CubicWebReSTParser(),
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
   359
                              writer=Writer(base_url=base_url),
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
   360
                              source_class=io.StringInput,
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
   361
                              destination_class=io.StringOutput)
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
   362
        pub.set_source(data)
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
   363
        pub.set_destination()
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
   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
Sylvain Thénault <sylvain.thenault@logilab.fr>
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
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 4769
diff changeset
   366
        del pub.settings.context
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
   367
        return res
0
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   368
    except Exception:
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   369
        LOGGER.exception('error while publishing ReST text')
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   370
        if not isinstance(data, unicode):
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
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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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
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)
Sylvain Thénault <sylvain.thenault@logilab.fr>
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)
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2680
diff changeset
   377
def cw_rest_init():
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
   378
    global _INITIALIZED
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
   379
    if _INITIALIZED:
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
   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)