[gvfs/wip/oholy/google-shared-drives-support] ci: Use Buildah instead of Docker to generate images

[Ondrej Holy <oholy src gnome org>]

commit 1a1a1d110102676ad7d32c6e24041de2c5e36926
Author: Ondrej Holy <oholy redhat com>
Date:   Fri Feb 12 12:29:47 2021 +0100

    ci: Use Buildah instead of Docker to generate images
    
    The GNOME runners are no more privileged and thus it is not possible to
    use Docker from the pipeline. Let's use Buildah instead Docker to fix
    the image generation.

 .gitlab-ci.yml | 26 +++++++++++++++-----------
 1 file changed, 15 insertions(+), 11 deletions(-)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 807ead66..389664b0 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -1,5 +1,7 @@
 fedora:
-    image: registry.gitlab.gnome.org/gnome/gvfs:latest
+    image:
+        name: registry.gitlab.gnome.org/gnome/gvfs:latest
+        entrypoint: ["/bin/sh", "-c"]
     tags:
         - x86_64
     script:
@@ -10,18 +12,20 @@ fedora:
 
 update-image:
     variables:
-         DOCKER_TLS_CERTDIR: ""
-    image: docker:latest
-    tags:
-        - privileged
-    services:
-        - docker:dind
+         STORAGE_DRIVER: vfs
+         BUILDAH_FORMAT: docker
+         BUILDAH_ISOLATION: chroot
+    image: registry.fedoraproject.org/fedora:33
     script:
-        - docker build --tag $CI_REGISTRY_IMAGE .gitlab-ci/
-        - docker tag $CI_REGISTRY_IMAGE "$CI_REGISTRY_IMAGE:v$CI_JOB_ID"
-        - docker login $CI_REGISTRY -u $CI_REGISTRY_USER -p $CI_REGISTRY_PASSWORD
-        - docker push $CI_REGISTRY_IMAGE
+        - dnf install -y buildah runc
+        - sed -i '/^mountopt =.*/d' /etc/containers/storage.conf
+        - buildah bud --tag $CI_REGISTRY_IMAGE -f .gitlab/Dockerfile
+        - buildah tag $CI_REGISTRY_IMAGE "$CI_REGISTRY_IMAGE:v$CI_JOB_ID"
+        - buildah login -u $CI_REGISTRY_USER -p $CI_REGISTRY_PASSWORD $CI_REGISTRY
+        - buildah push $CI_REGISTRY_IMAGE
+        - buildah push "$CI_REGISTRY_IMAGE:v$CI_JOB_ID"
     when: manual
     only:
         variables:
             - $CI_PROJECT_NAMESPACE == "GNOME"
+