Fixed #10004 and #12320 -- Enabled the makemessages management command to collect comments for translators that start with the "Translators" keyword. Thanks for the report and patches, martinb and Claude Paroz.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@14595 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/core/management/commands/makemessages.py

@@ -196,7 +196,7 @@ def make_messages(locale=None, domain='django', verbosity='1', all=False,
                     'xgettext -d %s -L Perl %s --keyword=gettext_noop '
                     '--keyword=gettext_lazy --keyword=ngettext_lazy:1,2 '
                     '--keyword=pgettext:1c,2 --keyword=npgettext:1c,2,3 '
-                    '--from-code UTF-8 -o - "%s"' % (
+                    '--from-code UTF-8 --add-comments=Translators -o - "%s"' % (
                         domain, wrap, os.path.join(dirpath, thefile)
                     )
                 )
@@ -240,8 +240,9 @@ def make_messages(locale=None, domain='django', verbosity='1', all=False,
                     '--keyword=ugettext_noop --keyword=ugettext_lazy '
                     '--keyword=ungettext_lazy:1,2 --keyword=pgettext:1c,2 '
                     '--keyword=npgettext:1c,2,3 --keyword=pgettext_lazy:1c,2 '
-                    '--keyword=npgettext_lazy:1c,2,3 --from-code UTF-8 -o - '
-                    '"%s"' % (domain, wrap, os.path.join(dirpath, thefile))
+                    '--keyword=npgettext_lazy:1c,2,3 --from-code UTF-8 '
+                    '--add-comments=Translators -o - "%s"' % (
+                        domain, wrap, os.path.join(dirpath, thefile))
                 )
                 msgs, errors = _popen(cmd)
                 if errors:
@@ -282,6 +283,8 @@ def make_messages(locale=None, domain='django', verbosity='1', all=False,
                     raise CommandError("errors happened while running msgmerge\n%s" % errors)
             elif not invoked_for_django:
                 msgs = copy_plural_forms(msgs, locale, domain, verbosity)
+            msgs = msgs.replace(
+                "#. #-#-#-#-#  %s.pot (PACKAGE VERSION)  #-#-#-#-#\n" % domain, "")
             f = open(pofile, 'wb')
             try:
                 f.write(msgs)

django/template/__init__.py

@@ -82,6 +82,7 @@ VARIABLE_TAG_START = '{{'
 VARIABLE_TAG_END = '}}'
 COMMENT_TAG_START = '{#'
 COMMENT_TAG_END = '#}'
+TRANSLATOR_COMMENT_MARK = 'Translators'
 SINGLE_BRACE_START = '{'
 SINGLE_BRACE_END = '}'
 
@@ -237,7 +238,10 @@ class Lexer(object):
             elif token_string.startswith(BLOCK_TAG_START):
                 token = Token(TOKEN_BLOCK, token_string[len(BLOCK_TAG_START):-len(BLOCK_TAG_END)].strip())
             elif token_string.startswith(COMMENT_TAG_START):
-                token = Token(TOKEN_COMMENT, '')
+                content = ''
+                if token_string.find(TRANSLATOR_COMMENT_MARK):
+                    content = token_string[len(COMMENT_TAG_START):-len(COMMENT_TAG_END)].strip()
+                token = Token(TOKEN_COMMENT, content)
         else:
             token = Token(TOKEN_TEXT, token_string)
         return token

django/utils/translation/trans_real.py

@@ -427,14 +427,23 @@ def templatize(src):
     does so by translating the Django translation tags into standard gettext
     function invocations.
     """
-    from django.template import Lexer, TOKEN_TEXT, TOKEN_VAR, TOKEN_BLOCK
+    from django.template import Lexer, TOKEN_TEXT, TOKEN_VAR, TOKEN_BLOCK, TOKEN_COMMENT
     out = StringIO()
     intrans = False
     inplural = False
     singular = []
     plural = []
+    incomment = False
+    comment = []
     for t in Lexer(src, None).tokenize():
-        if intrans:
+        if incomment:
+            if t.token_type == TOKEN_BLOCK and t.contents == 'endcomment':
+                out.write(' # %s' % ''.join(comment))
+                incomment = False
+                comment = []
+            else:
+                comment.append(t.contents)
+        elif intrans:
             if t.token_type == TOKEN_BLOCK:
                 endbmatch = endblock_re.match(t.contents)
                 pluralmatch = plural_re.match(t.contents)
@@ -488,6 +497,8 @@ def templatize(src):
                 elif cmatches:
                     for cmatch in cmatches:
                         out.write(' _(%s) ' % cmatch)
+                elif t.contents == 'comment':
+                    incomment = True
                 else:
                     out.write(blankout(t.contents, 'B'))
             elif t.token_type == TOKEN_VAR:
@@ -500,6 +511,8 @@ def templatize(src):
                         out.write(' %s ' % p.split(':',1)[1])
                     else:
                         out.write(blankout(p, 'F'))
+            elif t.token_type == TOKEN_COMMENT:
+                out.write(' # %s' % t.contents)
             else:
                 out.write(blankout(t.contents, 'X'))
     return out.getvalue()

docs/releases/1.3-alpha-2.txt

@@ -39,6 +39,22 @@ See the :doc:`reference documentation of the app </ref/contrib/staticfiles>`
 for more details or learn how to :doc:`manage static files
 </howto/static-files>`.
 
+Translation comments
+~~~~~~~~~~~~~~~~~~~~
+
+If you would like to give translators hints about a translatable string, you
+can add a comment prefixed with the ``Translators`` keyword on the line
+preceding the string, e.g.::
+
+    def my_view(request):
+        # Translators: This message appears on the home page only
+        output = ugettext("Welcome to my site.")
+
+The comment will appear in the resulting .po file and should also be
+displayed by most translation tools.
+
+For more information, see :ref:`translator-comments`.
+
 Backwards-incompatible changes in 1.3 alpha 2
 =============================================
 

docs/releases/1.3.txt

@@ -121,13 +121,17 @@ value, protect, or do nothing.
 For more information, see the :attr:`~django.db.models.ForeignKey.on_delete`
 documentation.
 
-Contextual markers in translatable strings
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+Contextual markers and comments for translatable strings
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
 For translation strings with ambiguous meaning, you can now
 use the ``pgettext`` function to specify the context of the string.
 
-For more information, see :ref:`contextual-markers`
+And if you just want to add some information for translators, you
+can also add special translator comments in the source.
+
+For more information, see :ref:`contextual-markers` and
+:ref:`translator-comments`.
 
 Everything else
 ~~~~~~~~~~~~~~~

docs/topics/i18n/internationalization.txt

@@ -100,6 +100,30 @@ instead of positional interpolation (e.g., ``%s`` or ``%d``) whenever you
 have more than a single parameter. If you used positional interpolation,
 translations wouldn't be able to reorder placeholder text.
 
+.. _translator-comments:
+
+Comments for translators
+------------------------
+
+.. versionadded:: 1.3
+
+If you would like to give translators hints about a translatable string, you
+can add a comment prefixed with the ``Translators`` keyword on the line
+preceding the string, e.g.::
+
+    def my_view(request):
+        # Translators: This message appears on the home page only
+        output = ugettext("Welcome to my site.")
+
+This also works in templates with the :ttag:`comment` tag:
+
+.. code-block:: django+html
+
+    {% comment %}Translators: This is a text of the base template {% endcomment %}
+
+The comment will then appear in the resulting .po file and should also be
+displayed by most translation tools.
+
 Marking strings as no-op
 ------------------------
 

tests/regressiontests/i18n/commands/__init__.py

@@ -0,0 +1,8 @@
+from django.utils.translation import ugettext as _
+
+# Translators: This comment should be extracted
+dummy1 = _("This is a translatable string.")
+
+# This comment should not be extracted
+dummy2 = _("This is another translatable string.")
+

tests/regressiontests/i18n/commands/extraction.py

@@ -38,7 +38,18 @@ class ExtractorTests(TestCase):
         return self.assert_(not re.search('^msgid %s' % msgid, s, re.MULTILINE))
 
 
-class TemplateExtractorTests(ExtractorTests):
+class BasicExtractorTests(ExtractorTests):
+
+    def test_comments_extractor(self):
+        os.chdir(self.test_dir)
+        management.call_command('makemessages', locale=LOCALE, verbosity=0)
+        self.assert_(os.path.exists(self.PO_FILE))
+        po_contents = open(self.PO_FILE, 'r').read()
+        self.assert_('#. Translators: This comment should be extracted' in po_contents)
+        self.assert_('This comment should not be extracted' not in po_contents)
+        # Comments in templates
+        self.assert_('#. Translators: Django template comment for translators' in po_contents)
+        self.assert_('#. Translators: Django comment block for translators' in po_contents)
 
     def test_templatize(self):
         os.chdir(self.test_dir)

tests/regressiontests/i18n/commands/templates/test.html

@@ -1,5 +1,8 @@
 {% load i18n %}
+{% comment %}Translators: Django comment block for translators {% endcomment %}
 {% trans "This literal should be included." %}
 {% trans "This literal should also be included wrapped or not wrapped depending on the use of the --no-wrap option." %}
-{% blocktrans %}I think that 100% is more that 50% of anything.{% endblocktrans %}
-{% blocktrans with 'txt' as obj %}I think that 100% is more that 50% of {{ obj }}.{% endblocktrans %}
+
+{# Translators: Django template comment for translators #}
+<p>{% blocktrans %}I think that 100% is more that 50% of anything.{% endblocktrans %}</p>
+{% blocktrans with 'txt' as obj %}I think that 100% is more that 50% of {{ obj }}.{% endblocktrans %}