Build QA image from cached master image

.gitlab/ci/review.gitlab-ci.yml

@@ -23,8 +23,10 @@ build-qa-image:
   stage: prepare
   script:
     - '[[ ! -d "ee/" ]] || export GITLAB_EDITION="ee"'
+    - export QA_MASTER_IMAGE="${CI_REGISTRY}/${CI_PROJECT_PATH}/gitlab/gitlab-${GITLAB_EDITION}-qa:master"
     - export QA_IMAGE="${CI_REGISTRY}/${CI_PROJECT_PATH}/gitlab/gitlab-${GITLAB_EDITION}-qa:${CI_COMMIT_REF_SLUG}"
-    - time docker build --cache-from gitlab/gitlab-${GITLAB_EDITION}-qa:nightly --tag ${QA_IMAGE} --file ./qa/Dockerfile ./
+    - time docker pull "${QA_MASTER_IMAGE}"
+    - time docker build --cache-from "${QA_MASTER_IMAGE}" --tag ${QA_IMAGE} --file ./qa/Dockerfile ./
     - echo "${CI_JOB_TOKEN}" | docker login --username gitlab-ci-token --password-stdin ${CI_REGISTRY}
     - time docker push ${QA_IMAGE}