[PATCH] gitlab-ci: Use docker images

[Daniel Vetter]

Shrinks the usual pipeline considerably, since we don't first waste a
few minutes installing stuff.

Signed-off-by: Daniel Vetter <daniel.vetter at intel.com>
---
 .gitlab-ci.yml    | 25 ++++++++++++++++++++++---
 Dockerfile.fedora |  4 ++++
 2 files changed, 26 insertions(+), 3 deletions(-)
 create mode 100644 Dockerfile.fedora

diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 91cb6a20585d..ab68a168b3d8 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -1,7 +1,26 @@
-image: fedora:latest
+image: $CI_REGISTRY/$CI_PROJECT_PATH/dim-fedora:latest
 
-before_script:
-  - dnf install -y ShellCheck python3-docutils python3-sphinx make
+stages:
+  - containers
+  - build
+  - deploy
+
+container-build:
+    stage: containers
+    image: docker:stable
+    only:
+        changes:
+            - Dockerfile.fedora
+            - .gitlab-ci.yml
+    services:
+        - docker:dind
+    variables:
+        DOCKER_HOST: tcp://docker:2375
+        DOCKER_DRIVER: overlay2
+    script:
+        - docker login -u gitlab-ci-token -p $CI_JOB_TOKEN $CI_REGISTRY
+        - docker build -t $CI_REGISTRY/$CI_PROJECT_PATH/dim-fedora -f Dockerfile.fedora .
+        - docker push $CI_REGISTRY/$CI_PROJECT_PATH/dim-fedora
 
 check:
     stage: build
diff --git a/Dockerfile.fedora b/Dockerfile.fedora
new file mode 100644
index 000000000000..0e1132ed401c
--- /dev/null
+++ b/Dockerfile.fedora
@@ -0,0 +1,4 @@
+FROM fedora:28
+
+RUN dnf install -y \
+	ShellCheck python3-docutils python3-sphinx make
-- 
2.19.1