--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/i18n.py	Wed Mar 24 10:23:31 2010 +0100
@@ -0,0 +1,98 @@
+"""Some i18n/gettext utilities.
+
+:organization: Logilab
+:copyright: 2001-2010 LOGILAB S.A. (Paris, FRANCE), license is LGPL v2.
+:contact: http://www.logilab.fr/ -- mailto:contact@logilab.fr
+:license: GNU Lesser General Public License, v2.1 - http://www.gnu.org/licenses
+"""
+__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()):
+            print >> output, '_("%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 execute(cmd):
+    """display the command, execute it and raise an Exception if returned
+    status != 0
+    """
+    from subprocess import call
+    print cmd.replace(os.getcwd() + os.sep, '')
+    status = call(cmd, shell=True)
+    if status != 0:
+        raise Exception('status = %s' % status)
+
+
+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 logilab.common.fileutils import ensure_fs_mode
+    print '-> compiling %s catalogs...' % 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
+            execute('msgcat --use-first --sort-output --strict -o "%s" %s'
+                    % (mergedpo, ' '.join('"%s"' % f for f in pofiles)))
+            # 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
+            execute('msgfmt "%s" -o "%s"' % (mergedpo, applmo))
+        except Exception, ex:
+            errors.append('while handling language %s: %s' % (lang, ex))
+        try:
+            # clean everything
+            os.unlink(mergedpo)
+        except Exception:
+            continue
+    return errors