[PATCH] gitlab-ci: Use docker images

[Arkadiusz Hiler]

On Wed, Oct 31, 2018 at 02:36:12PM +0100, Daniel Vetter wrote:
> 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

In which scenarios do you see value in rebuilding docker images when
.gitlab-ci.yml changes?

I was considering something similar for IGT but gave up on the idea
after not being able to came up with sensible, beneficial scenarios.

Nevertheless,
Reviewed-by: Arkadiusz Hiler <arkadiusz.hiler at intel.com>