Add --force-rebuild flag

cloud-build.py

@@ -57,6 +57,11 @@ def parse_args():
         action='store_true',
         help='create remote directories',
     )
+    parser.add_argument(
+        '--force-rebuild',
+        action='store_true',
+        help='forces rebuild',
+    )
     parser.add_argument(
         '--no-tests',
         action='store_true',
@@ -86,6 +91,7 @@ def main():
         config=args.config,
         tasks=args.tasks,
         built_images_dir=args.built_images_dir,
+        force_rebuild=args.force_rebuild,
     )
 
     if 'build' in stages:

cloud_build/cloud_build.py

@@ -57,10 +57,13 @@ class CB:
             data_dir: Optional[PathLike] = None,
             tasks: Optional[dict[str, List[str]]] = None,
             built_images_dir: Optional[PathLike] = None,
+            force_rebuild: bool = False,
     ) -> None:
         self.initialized = False
         self._save_cwd = os.getcwd()
         self.parse_config(config)
+        if force_rebuild:
+            self.rebuild_after = datetime.timedelta(0)
         if tasks is None:
             self.tasks = {}
         else:

tests/test_rebuild.py

@@ -37,6 +37,20 @@ class TestRebuild(TestCase):
         with self.assertRaises(BuildError, msg=msg):
             self.cb.create_images(no_tests=True)
 
+    @mock.patch('subprocess.call', call.Call(decorators=DS))
+    def test_do_force_rebuild(self):
+        tarball = self.data_dir / 'out/docker_Sisyphus-x86_64.tar.xz'
+        tarball.touch()
+        del self.cb
+        cb = CB(
+            config='tests/test_rebuild.yaml',
+            data_dir=self.data_dir,
+            force_rebuild=True,
+        )
+        msg = 'Do not try to rebuild when force_rebuild'
+        with self.assertRaises(BuildError, msg=msg):
+            cb.create_images(no_tests=True)
+
     @mock.patch('subprocess.call', call.Call(decorators=DS))
     def test_dont_rebuild(self):
         tarball = self.data_dir / 'out/docker_Sisyphus-x86_64.tar.xz'