Something with bash and quotes

  script:

    - docker build

      --build-arg BUILDKIT_INLINE_CACHE=1

      --build-arg LDAP_PLUGIN_URL=$LDAP_PLUGIN_URL

      --pull

      --build-arg LDAP_PLUGIN_URL="${LDAP_PLUGIN_URL}"

      --cache-from $CI_REGISTRY_IMAGE:stage-src

      --target src

      -t "$CI_REGISTRY_IMAGE:stage-src"

    - docker push "$CI_REGISTRY_IMAGE:stage-texlive-update-branch-$CI_COMMIT_REF_SLUG"

    - docker build

      --build-arg BUILDKIT_INLINE_CACHE=1

      --build-arg login_text=$LOGIN_TEXT

      --build-arg collab_text=$COLLAB_TEXT

      --build-arg login_text="${LOGIN_TEXT}"

      --build-arg collab_text="${COLLAB_TEXT}"

      --pull

      --cache-from $CI_REGISTRY_IMAGE

      --target app --squash