Build and push all examples/ images (#143)

* Build and push all examples/ images

* Fix an error with path

* Add TODO and comments

* Absolute path

Author: janetkuo

dev/tools/push-images

@@ -83,7 +83,9 @@ def build_and_push_image(args, service_name, srcdir, dockerfile_path):
     if args.kind_cluster_name:
         load_kind_image(args.kind_cluster_name, service_name, srcdir)
 
-
+# This only builds and pushes images in directories with
+# 1) go.mod file
+# 2) images/*/Dockerfile
 def push_image_for_go_mod(args, mod_dir):
     """Builds and pushes docker images."""
     images_dir = os.path.join(mod_dir, "images")
@@ -105,10 +107,37 @@ def push_image_for_go_mod(args, mod_dir):
             build_and_push_image(args, service_name, mod_dir, dockerfile_path)
 
 
+# This only builds and pushes images in examples/*/Dockerfile
+def push_images_for_examples(args):
+    """Builds and pushes docker images for examples."""
+    repo_root = os.path.dirname(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
+    examples_dir = os.path.join(repo_root, "examples")
+    if not os.path.isdir(examples_dir):
+        return
+
+    for example in os.listdir(examples_dir):
+        example_dir = os.path.join(examples_dir, example)
+        if not os.path.isdir(example_dir):
+            continue
+
+        dockerfile_path = os.path.join(example_dir, "Dockerfile")
+        if not os.path.isfile(dockerfile_path):
+            continue
+
+        service_name = example.replace("-", "_")
+
+        print(f"create Docker buildx builder for {service_name}")
+        create_buildx_builder_if_not_exists()
+        print(f"building image for {service_name}")
+        build_and_push_image(args, service_name, example_dir, "Dockerfile")
+
+
 def main(args):
     """Builds and pushes docker images."""
     golang.for_each_module(lambda mod_dir: push_image_for_go_mod(args, mod_dir))
-
+    push_images_for_examples(args)
+    # TODO: Handle image building and pushing logic better
+    
 
 if __name__ == "__main__":
     # parse arguments and call