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

[Ondrej Holy <oholy src gnome org>]

commit 4d2329395df53fa2e7cee226a943c2799702251a
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 | 27 ++++++++++++++++-----------
 1 file changed, 16 insertions(+), 11 deletions(-)
---
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 807ead66..41aa7c37 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 +12,21 @@ 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
+    stage: image
     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"
+