Supports Isaac Lab image based on different Isaac Sim images (#173)

This change will allow generation of multiple Isaac Lab images based on
different versions of Isaac Sim images. Previously, only a single image
can be created.

.aws/postmerge-ci-buildspec.yml

@@ -28,13 +28,17 @@ phases:
           REPO_SHORT_NAME="verification"
         fi
 
+        # Parse the env variable string into an array
+        mapfile -d ' ' -t IMAGE_BASE_VERSIONS <<< "$ISAACSIM_BASE_VERSIONS_STRING"
+        for IMAGE_BASE_VERSION in "${IMAGE_BASE_VERSIONS[@]}"; do
+          IMAGE_BASE_VERSION=$(echo "$IMAGE_BASE_VERSION" | tr -d '[:space:]')
           # Combine repo short name and branch name for the tag
-        COMBINED_TAG="${REPO_SHORT_NAME}-${SAFE_BRANCH_NAME}"
+          COMBINED_TAG="${REPO_SHORT_NAME}-${SAFE_BRANCH_NAME}-${IMAGE_BASE_VERSION}"
 
           docker login -u \$oauthtoken -p $NGC_TOKEN nvcr.io
           docker build -t $IMAGE_NAME:$COMBINED_TAG \
             --build-arg ISAACSIM_BASE_IMAGE_ARG=$ISAACSIM_BASE_IMAGE \
-          --build-arg ISAACSIM_VERSION_ARG=$ISAACSIM_BASE_VERSION \
+            --build-arg ISAACSIM_VERSION_ARG=$IMAGE_BASE_VERSION \
             --build-arg ISAACSIM_ROOT_PATH_ARG=/isaac-sim \
             --build-arg ISAACLAB_PATH_ARG=/workspace/isaaclab \
             --build-arg DOCKER_USER_HOME_ARG=/root \
@@ -42,3 +46,4 @@ phases:
           docker push $IMAGE_NAME:$COMBINED_TAG
           docker tag $IMAGE_NAME:$COMBINED_TAG $IMAGE_NAME:$COMBINED_TAG-b$CODEBUILD_BUILD_NUMBER
           docker push $IMAGE_NAME:$COMBINED_TAG-b$CODEBUILD_BUILD_NUMBER
+        done