Fixed #18479 -- Stopped makemessages raising error on gettext warnings

Thanks Niels Busch for the initial patch.

django/core/management/commands/makemessages.py

@@ -13,6 +13,7 @@ from django.utils.text import get_text_list
 from django.utils.jslex import prepare_js_for_gettext
 
 plural_forms_re = re.compile(r'^(?P<value>"Plural-Forms.+?\\n")\s*$', re.MULTILINE | re.DOTALL)
+STATUS_OK = 0
 
 def handle_extensions(extensions=('html',), ignored=('py',)):
     """
@@ -43,7 +44,8 @@ def _popen(cmd):
     Friendly wrapper around Popen for Windows
     """
     p = Popen(cmd, shell=True, stdout=PIPE, stderr=PIPE, close_fds=os.name != 'nt', universal_newlines=True)
-    return p.communicate()
+    output, errors = p.communicate()
+    return output, errors, p.returncode
 
 def walk(root, topdown=True, onerror=None, followlinks=False,
          ignore_patterns=None, verbosity=0, stdout=sys.stdout):
@@ -198,8 +200,9 @@ def process_file(file, dirpath, potfile, domain, verbosity,
             (domain, wrap, location, work_file))
     else:
         return
-    msgs, errors = _popen(cmd)
+    msgs, errors, status = _popen(cmd)
     if errors:
+        if status != STATUS_OK:
             if is_templatized:
                 os.unlink(work_file)
             if os.path.exists(potfile):
@@ -207,6 +210,9 @@ def process_file(file, dirpath, potfile, domain, verbosity,
             raise CommandError(
                 "errors happened while running xgettext on %s\n%s" %
                 (file, errors))
+        elif verbosity > 0:
+            # Print warnings
+            stdout.write(errors)
     if msgs:
         write_pot_file(potfile, msgs, orig_file, work_file, is_templatized)
     if is_templatized:
@@ -220,20 +226,28 @@ def write_po_file(pofile, potfile, domain, locale, verbosity, stdout,
 
     Uses mguniq, msgmerge, and msgattrib GNU gettext utilities.
     """
-    msgs, errors = _popen('msguniq %s %s --to-code=utf-8 "%s"' %
+    msgs, errors, status = _popen('msguniq %s %s --to-code=utf-8 "%s"' %
                                     (wrap, location, potfile))
     if errors:
+        if status != STATUS_OK:
             os.unlink(potfile)
-        raise CommandError("errors happened while running msguniq\n%s" % errors)
+            raise CommandError(
+                "errors happened while running msguniq\n%s" % errors)
+        elif verbosity > 0:
+            stdout.write(errors)
+
     if os.path.exists(pofile):
         with open(potfile, 'w') as fp:
             fp.write(msgs)
-        msgs, errors = _popen('msgmerge %s %s -q "%s" "%s"' %
+        msgs, errors, status = _popen('msgmerge %s %s -q "%s" "%s"' %
                                         (wrap, location, pofile, potfile))
         if errors:
+            if status != STATUS_OK:
                 os.unlink(potfile)
                 raise CommandError(
                     "errors happened while running msgmerge\n%s" % errors)
+            elif verbosity > 0:
+                stdout.write(errors)
     elif copy_pforms:
         msgs = copy_plural_forms(msgs, locale, domain, verbosity, stdout)
     msgs = msgs.replace(
@@ -242,11 +256,15 @@ def write_po_file(pofile, potfile, domain, locale, verbosity, stdout,
         fp.write(msgs)
     os.unlink(potfile)
     if no_obsolete:
-        msgs, errors = _popen('msgattrib %s %s -o "%s" --no-obsolete "%s"' %
+        msgs, errors, status = _popen(
+            'msgattrib %s %s -o "%s" --no-obsolete "%s"' %
             (wrap, location, pofile, pofile))
         if errors:
+            if status != STATUS_OK:
                 raise CommandError(
                     "errors happened while running msgattrib\n%s" % errors)
+            elif verbosity > 0:
+                stdout.write(errors)
 
 def make_messages(locale=None, domain='django', verbosity=1, all=False,
         extensions=None, symlinks=False, ignore_patterns=None, no_wrap=False,
@@ -291,8 +309,8 @@ def make_messages(locale=None, domain='django', verbosity=1, all=False,
         raise CommandError(message)
 
     # We require gettext version 0.15 or newer.
-    output, errors = _popen('xgettext --version')
+    output, errors, status = _popen('xgettext --version')
-    if errors:
+    if status != STATUS_OK:
         raise CommandError("Error running xgettext. Note that Django "
                     "internationalization requires GNU gettext 0.15 or newer.")
     match = re.search(r'(?P<major>\d+)\.(?P<minor>\d+)', output)

tests/regressiontests/i18n/commands/code.sample

@@ -0,0 +1,4 @@
+from django.utils.translation import ugettext
+
+# This will generate an xgettext warning
+my_string = ugettext("This string contain two placeholders: %s and %s" % ('a', 'b'))

tests/regressiontests/i18n/commands/extraction.py

@@ -117,6 +117,14 @@ class BasicExtractorTests(ExtractorTests):
         # Check that the temporary file was cleaned up
         self.assertFalse(os.path.exists('./templates/template_with_error.html.py'))
 
+    def test_extraction_warning(self):
+        os.chdir(self.test_dir)
+        shutil.copyfile('./code.sample', './code_sample.py')
+        stdout = StringIO()
+        management.call_command('makemessages', locale=LOCALE, stdout=stdout)
+        os.remove('./code_sample.py')
+        self.assertIn("code_sample.py:4", stdout.getvalue())
+
     def test_template_message_context_extractor(self):
         """
         Ensure that message contexts are correctly extracted for the