images --size

Add a --size option to podman images to allow for disabling computing
the size of listed images.  If listing images is critical to
performance, user may chose to turn off size computation to speed things
up.

Context: #13755
Signed-off-by: Valentin Rothberg <vrothberg@redhat.com>

test/system/010-images.bats

@@ -312,4 +312,15 @@ Deleted: $pauseID"
     is "$output" ""
 }
 
+@test "podman images --size" {
+    run_podman images
+    is "${lines[0]}" "REPOSITORY.*TAG.*IMAGE ID.*CREATED.*SIZE"
+    run_podman images --noheading --format "{{.Size}}"
+    is "$output" ".* MB"
+    run_podman images --size=false
+    is "${lines[0]}" "REPOSITORY.*TAG.*IMAGE ID.*CREATED"
+    run_podman images --noheading --format "{{.Size}}" --size=false
+    is "$output" "0 B"
+}
+
 # vim: filetype=sh