Update pipeline setup

.gitlab/ci/definitions.yml

@@ -1,21 +1,27 @@
-.build_and_push:
-  stage: custom
-  needs: []
+.install-qemu:
+  timeout: 2 hours # builds with emulation can take a long time to complete
   tags:
     - docker
     - high-cpu
   variables:
     QEMU_IMAGE: tonistiigi/binfmt:qemu-v6.2.0
-  timeout: 2 hours
   before_script:
-    - echo "$CI_REGISTRY_PASSWORD" | docker login "$CI_REGISTRY" -u "$CI_REGISTRY_USER" --password-stdin
     - |
-      if [ "${ARCH:-amd64}" != "amd64" ]; then
+      if [ "$PUSH_CUSTOM_IMAGE" == "true" ]; then
+        echo "$CI_REGISTRY_PASSWORD" | docker login "$CI_REGISTRY" -u "$CI_REGISTRY_USER" --password-stdin
+      fi
+    - |
+      if [[ "${ARCH:-amd64}" =~ arm64 ]]; then
         echo -e "\033[1;33mInstalling latest qemu emulators\033[0m"
         docker pull -q ${QEMU_IMAGE};
         docker run --rm --privileged ${QEMU_IMAGE} --uninstall qemu-*;
         docker run --rm --privileged ${QEMU_IMAGE} --install all;
       fi
+
+.build_and_push:
+  stage: custom
+  extends: .install-qemu
+  needs: []
   script:
     - ./scripts/lib/custom-docker-build
   rules:
@@ -33,16 +39,20 @@
 
 .cache-google-chrome:
   stage: automation
+  extends: .install-qemu
   needs: []
+  variables:
+    ARCH: linux/amd64,linux/arm64
   before_script:
-    - docker buildx create --use
+    - !reference [.install-qemu, before_script]
+    - docker buildx create --use # creates context that's capable of building multiple architectures in parallel
   script:
     - |
       docker buildx build \
         --build-arg CI_API_V4_URL=$CI_API_V4_URL \
         --build-arg CI_PROJECT_ID=$CI_PROJECT_ID \
         --build-arg CI_JOB_TOKEN=$CI_JOB_TOKEN \
-        --platform linux/amd64,linux/arm64 \
+        --platform $ARCH \
         -f "Dockerfile.cache-chrome" \
         .
   rules: