add option --remove-images

.github/workflows/build_images.yml

@@ -38,7 +38,10 @@ jobs:
           docker images
       - name: Build Docker Images
         run: |
-          ./build_images.py --branch '${{ github.event.inputs.branch }}' --repo '${{ github.event.inputs.repo }}' --root-image-name '${{ github.event.inputs.root_image_name }}'
+          ./build_images.py \
+            --branch '${{ github.event.inputs.branch }}' \
+            --repo '${{ github.event.inputs.repo }}' \
+            --root-image-name '${{ github.event.inputs.root_image_name }}'
       - name: Show Building Graph
         run: |
           cat graph.yaml

.github/workflows/build_images_regular.yml

@@ -24,7 +24,7 @@ jobs:
       - name: Build Docker Images Regularly
         run: |
           df -lh
-          ./build_images.py --branch "" --repo "" --root-image-name ""
+          ./build_images.py --branch "" --repo "" --root-image-name "" --remove-images
           cat graph.yaml
           df -lh
       - name: Set Environment Variable

build_images.py

@@ -61,6 +61,12 @@ def parse_args(args=None, namespace=None) -> Namespace:
         required=True,
         help="The name of the base/root Docker image in dependency resolving.",
     )
+    parser.add_argument(
+        "--remove-images",
+        dest="remove_images",
+        action="store_true",
+        help="Remove a Docker image when it's not needed (for building other images).",
+    )
     return parser.parse_args(args=args, namespace=namespace)
 
 
@@ -73,7 +79,7 @@ def main() -> None:
             args.branch = "dev"
         branch_urls = {args.branch: {args.repo: args.root_image_name}}
     builder = DockerImageBuilder(branch_urls)
-    builder.build_images(remove=True)
+    builder.build_images(remove=args.remove_images)
     builder.save_graph()