Fix Reducing the amount being downloaded every time the hash changes. (#4078)

openhands/runtime/builder/docker.py

@@ -166,11 +166,12 @@ class DockerRuntimeBuilder(RuntimeBuilder):
         )
         return target_image_hash_name
 
-    def image_exists(self, image_name: str) -> bool:
+    def image_exists(self, image_name: str, pull_from_repo: bool = True) -> bool:
         """Check if the image exists in the registry (try to pull it first) or in the local store.
 
         Args:
             image_name (str): The Docker image to check (<image repo>:<image tag>)
+            pull_from_repo (bool): Whether to pull from the remote repo if the image not present locally
         Returns:
             bool: Whether the Docker image exists in the registry or in the local store
         """
@@ -184,6 +185,11 @@ class DockerRuntimeBuilder(RuntimeBuilder):
             logger.debug('Image found locally.')
             return True
         except docker.errors.ImageNotFound:
+            if not pull_from_repo:
+                logger.debug(
+                    f'Image {image_name} not found locally'
+                )
+                return False
             try:
                 logger.debug(
                     'Image not found locally. Trying to pull it, please wait...'