Support SHA256 tag for podman images (#570)

Fix #569
Signed-off-by: Sagi Shnaidman <sshnaidm@redhat.com>

plugins/modules/podman_image.py

@@ -428,7 +428,8 @@ class PodmanImageManager(object):
             self.name = repo
             self.tag = repo_tag
 
-        self.image_name = '{name}:{tag}'.format(name=self.name, tag=self.tag)
+        delimiter = ':' if "sha256" not in self.tag else '@'
+        self.image_name = '{name}{d}{tag}'.format(name=self.name, d=delimiter, tag=self.tag)
 
         if self.state in ['present', 'build']:
             self.present()

tests/integration/targets/podman_image/tasks/main.yml

@@ -152,6 +152,18 @@
           - specific_image2 is not changed
           - "'v3.3.11' in images.stdout"
 
+    - name: Get info about pulled image
+      containers.podman.podman_image_info:
+        executable: "{{ test_executable | default('podman') }}"
+        name: quay.io/coreos/etcd:v3.3.11
+      register: sha_image_info
+
+    - name: Pull image with SHA256 tag
+      containers.podman.podman_image:
+        executable: "{{ test_executable | default('podman') }}"
+        name: "quay.io/coreos/etcd@{{ sha_image_info.images.0.Digest }}"  #quay.io/coreos/coreos-installer:latest
+        state: present
+
     - name: Create a build directory with a subdirectory
       file:
         path: /var/tmp/build/subdir