Sync arm64 image; switch to nest/tools/buildah

.gitlab-ci.yml

@@ -3,13 +3,21 @@ stages:
   - 'sync'
 
 default:
-  image: 'quay.io/containers/buildah'
+  image: '${CI_REGISTRY}/nest/tools/buildah:haswell'
   before_script:
     - 'buildah login -u "$CI_REGISTRY_USER" -p "$CI_REGISTRY_PASSWORD" "$CI_REGISTRY"'
 
-'Sync gentoo/stage3:amd64':
+'Sync amd64':
   stage: 'sync'
-  script:
-    - 'buildah pull gentoo/stage3:amd64'
-    - 'buildah tag gentoo/stage3:amd64 "${CI_REGISTRY_IMAGE}:amd64"'
-    - 'buildah push "${CI_REGISTRY_IMAGE}:amd64"'
+  variables:
+    ARCH: 'amd64'
+  script: &script
+    - 'buildah pull gentoo/stage3:${ARCH}'
+    - 'buildah tag gentoo/stage3:${ARCH} "${CI_REGISTRY_IMAGE}:${ARCH}"'
+    - 'buildah push "${CI_REGISTRY_IMAGE}:${ARCH}"'
+
+'Sync arm64':
+  stage: 'sync'
+  variables:
+    ARCH: 'arm64'
+  script: *script