i18n.py
author Julien Cristau <julien.cristau@logilab.fr>
Tue, 04 Nov 2014 14:10:02 +0100
changeset 10024 2a08247b57fb
parent 8695 358d8bed9626
child 10589 7c23b7de2b8d
permissions -rw-r--r--
[server] commit after serializing schema Use separate transactions for schema serialization and postcreate scripts execution, so that the latter can rely on the schema being persistently stored. This matters e.g. if something in a postcreate violates a unique_together constraint, we need the constraint persisted in order to raise a meaningful error. See #4525069.

# copyright 2003-2010 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
# contact http://www.logilab.fr/ -- mailto:contact@logilab.fr
#
# This file is part of CubicWeb.
#
# CubicWeb is free software: you can redistribute it and/or modify it under the
# terms of the GNU Lesser General Public License as published by the Free
# Software Foundation, either version 2.1 of the License, or (at your option)
# any later version.
#
# CubicWeb is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
# FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more
# details.
#
# You should have received a copy of the GNU Lesser General Public License along
# with CubicWeb.  If not, see <http://www.gnu.org/licenses/>.
"""Some i18n/gettext utilities."""

__docformat__ = "restructuredtext en"

import re
import os
from os.path import join, basename, splitext, exists
from glob import glob

from cubicweb.toolsutils import create_dir

def extract_from_tal(files, output_file):
    """extract i18n strings from tal and write them into the given output file
    using standard python gettext marker (_)
    """
    output = open(output_file, 'w')
    for filepath in files:
        for match in re.finditer('i18n:(content|replace)="([^"]+)"', open(filepath).read()):
            output.write('_("%s")' % match.group(2))
    output.close()


def add_msg(w, msgid, msgctx=None):
    """write an empty pot msgid definition"""
    if isinstance(msgid, unicode):
        msgid = msgid.encode('utf-8')
    if msgctx:
        if isinstance(msgctx, unicode):
            msgctx = msgctx.encode('utf-8')
        w('msgctxt "%s"\n' % msgctx)
    msgid = msgid.replace('"', r'\"').splitlines()
    if len(msgid) > 1:
        w('msgid ""\n')
        for line in msgid:
            w('"%s"' % line.replace('"', r'\"'))
    else:
        w('msgid "%s"\n' % msgid[0])
    w('msgstr ""\n\n')

def execute2(args):
    # XXX replace this with check_output in Python 2.7
    from subprocess import Popen, PIPE, CalledProcessError
    p = Popen(args, stdout=PIPE, stderr=PIPE)
    out, err = p.communicate()
    if p.returncode != 0:
        exc = CalledProcessError(p.returncode, args[0])
        exc.cmd = args
        exc.data = (out, err)
        raise exc

def available_catalogs(i18ndir=None):
    if i18ndir is None:
        wildcard = '*.po'
    else:
        wildcard = join(i18ndir, '*.po')
    for popath in glob(wildcard):
        lang = splitext(basename(popath))[0]
        yield lang, popath


def compile_i18n_catalogs(sourcedirs, destdir, langs):
    """generate .mo files for a set of languages into the `destdir` i18n directory
    """
    from subprocess import CalledProcessError
    from logilab.common.fileutils import ensure_fs_mode
    print '-> compiling message catalogs to %s' % destdir
    errors = []
    for lang in langs:
        langdir = join(destdir, lang, 'LC_MESSAGES')
        if not exists(langdir):
            create_dir(langdir)
        pofiles = [join(path, '%s.po' % lang) for path in sourcedirs]
        pofiles = [pof for pof in pofiles if exists(pof)]
        mergedpo = join(destdir, '%s_merged.po' % lang)
        try:
            # merge instance/cubes messages catalogs with the stdlib's one
            cmd = ['msgcat', '--use-first', '--sort-output', '--strict',
                   '-o', mergedpo] + pofiles
            execute2(cmd)
            # make sure the .mo file is writeable and compiles with *msgfmt*
            applmo = join(destdir, lang, 'LC_MESSAGES', 'cubicweb.mo')
            try:
                ensure_fs_mode(applmo)
            except OSError:
                pass # suppose not exists
            execute2(['msgfmt', mergedpo, '-o', applmo])
        except CalledProcessError as exc:
            errors.append(u'while handling language %s:\ncmd:\n%s\nstdout:\n%s\nstderr:\n%s\n' %
                          (lang, exc.cmd, repr(exc.data[0]), repr(exc.data[1])))
        except Exception as exc:
            errors.append(u'while handling language %s: %s' % (lang, exc))
        try:
            # clean everything
            os.unlink(mergedpo)
        except Exception:
            continue
    return errors