DIB: install podman as dep

disk-imagebuild needs podman for the fedora-container element and
probably more.

Change-Id: I4577dc68300ac6aa357b355490d60bd5679603ce

tasks/install.yaml

@@ -17,6 +17,23 @@
     diskimage_builder_build_depends: "{{ __diskimage_builder_build_depends | list }}"
   when: diskimage_builder_build_depends is not defined
 
+- when:
+  - ansible_distribution == "Ubuntu"
+  - ansible_distribution_version == "18.04"
+  block:
+    - name: Add buildah repository key
+      become: yes
+      apt_key:
+        url: https://download.opensuse.org/repositories/devel:kubic:libcontainers:stable/xUbuntu_18.04/Release.key
+        state: present
+
+    - name: Enable buildah repository
+      become: yes
+      apt_repository:
+        repo: deb http://download.opensuse.org/repositories/devel:/kubic:/libcontainers:/stable/xUbuntu_18.04/ /
+        update_cache: yes
+        filename: buildah
+
 - name: Define diskimage_builder_depends
   set_fact:
     diskimage_builder_depends: "{{ __diskimage_builder_depends | list }}"

vars/Debian.yaml

@@ -23,5 +23,6 @@ __diskimage_builder_depends:
   - qemu-utils
   - uuid-runtime
   - yum-utils
+  - podman
 
 __diskimage_builder_package_name: python-diskimage-builder