[librsvg-oci-images/clippy] Make sure the namespace is lowercased.

[Jordan Petridis <jpetridis src gnome org>]

commit f83c8f8d1a4186d1b1c6fdce39834a630b8c74aa
Author: Jordan Petridis <jordanpetridis protonmail com>
Date:   Thu May 17 17:11:03 2018 +0300

    Make sure the namespace is lowercased.

 .gitlab-ci.yml | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index a2c959c..39db727 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -5,12 +5,11 @@ services:
 stages:
     - clippy
 
-variables:
-  IMAGE_TAG: ${CI_REGISTRY}/${CI_PROJECT_NAMESPACE}/${CI_PROJECT_NAME}/clippy:nightly
-
 build:
   stage: clippy
   script:
+    - export NAMESPACE="$(echo "${CI_PROJECT_NAMESPACE}" | tr A-Z a-z)"
+    - export IMAGE=${CI_REGISTRY}/${NAMESPACE}/${CI_PROJECT_NAME}/clippy:nightly
     - docker login -u ${CI_REGISTRY_USER} -p ${CI_REGISTRY_PASSWORD} ${CI_REGISTRY}
     - docker build --pull -f clippy.yml -t ${IMAGE_TAG} .
-    - docker push ${IMAGE_TAG}
\ No newline at end of file
+    - docker push ${IMAGE_TAG}