podman image scp remote support & podman image scp tagging

add support for podman-remote image scp as well as direct access via the API. This entailed
a full rework of the layering of image scp functions as well as the usual API plugging and type creation

also, implemented podman image scp tagging. which makes the syntax much more readable and allows users t tag the new image
they are loading to the local/remote machine:

allow users to pass a "new name" for the image they are transferring
`podman tag` as implemented creates a new image im `image list` when tagging, so this does the same
meaning that when transferring images with tags, podman on the remote machine/user will load two images
ex: `podman image scp computer1::alpine computer2::foobar` creates alpine:latest and localhost/foobar on the remote host

implementing tags means removal of the flexible syntax. In the currently released podman image scp, the user can either specify
`podman image scp source::img dest::` or `podman image scp dest:: source::img`. However, with tags this task becomes really hard to check
which is the image (src) and which is the new tag (dst). Removal of that streamlines the arg parsing process

Signed-off-by: Charlie Doern <cdoern@redhat.com>

1 files changed, 17 insertions, 7 deletions

diff --git a/test/system/120-load.bats b/test/system/120-load.bats
index 5a7f63b43..7f0bcfd95 100644
--- a/test/system/120-load.bats
+++ b/test/system/120-load.bats
@@ -128,8 +128,24 @@ verify_iid_and_name() {
     run_podman image inspect --format '{{.Digest}}' $newname
     is "$output" "$src_digest" "Digest of re-fetched image matches original"
 
-    # Clean up
+    # test tagging capability
+    run_podman untag $IMAGE $newname
+    run_podman image scp ${notme}@localhost::$newname foobar:123
+
+    run_podman image inspect --format '{{.Digest}}' foobar:123
+    is "$output" "$src_digest" "Digest of re-fetched image matches original"
+
+    # remove root img for transfer back with another name
     _sudo $PODMAN image rm $newname
+
+    # get foobar's ID, for an ID transfer test
+    run_podman image inspect --format '{{.ID}}' foobar:123
+    run_podman image scp $output ${notme}@localhost::foobartwo
+
+    _sudo $PODMAN image exists foobartwo
+
+    # Clean up
+    _sudo $PODMAN image rm foobartwo
     run_podman untag $IMAGE $newname
 
     # Negative test for nonexistent image.
@@ -142,12 +158,6 @@ verify_iid_and_name() {
     run_podman 125 image scp $nope ${notme}@localhost::
     is "$output" "Error: $nope: image not known.*" "Pushing nonexistent image"
 
-    # Negative test for copying to a different name
-    run_podman 125 image scp $IMAGE ${notme}@localhost::newname:newtag
-    is "$output" "Error: cannot specify an image rename: invalid argument" \
-       "Pushing with a different name: not allowed"
-
-    # FIXME: any point in copying by image ID? What else should we test?
 }