OCI ImageDestination

[runcom]

/cc @mtrmac @sgotti

There are still a couple of stuff to be taken care of here but pls review and comment if you can
Most notably we need to take care of containers/skopeo#102 (comment) /cc @mtrmac

Signed-off-by: Antonio Murdaca runcom@redhat.com

[mtrmac]

.ACK, pending the MIME type flexibility to make copy work.

[sgotti]

Will the creation of the ref and the oci-layout file be added in a future PR? Will the ref be mapped to the docker tag?

[runcom]

@sgotti what you asked is here, oci-layout and ref which comes from the docker tag/digest in case the ImageSource is a docker ImageSource

[sgotti]

@runcom that means that I shouldn't look at github diffs from a phone 😜

[runcom]

Definitely :)

[runcom]

rebased to have mime types flexibility bits /cc @mtrmac

[runcom]

@mtrmac ready to review

[mtrmac]

👍 ; please test against skopeo before merging.

[runcom]

The test against skopeo will be in containers/skopeo#133

[runcom]

skopeo's working fine:

$ ./skopeo copy docker://busybox:latest oci:busybox-latest

$ echo $?
0

$ l busybox-latest 
total 20K
drwxr-xr-x.  4 amurdaca amurdaca 4.0K Jun 29 23:29 .
drwxrwxr-x. 11 amurdaca amurdaca 4.0K Jun 29 23:29 ..
drwxr-xr-x.  2 amurdaca amurdaca 4.0K Jun 29 23:29 blobs
-rw-r--r--.  1 amurdaca amurdaca   31 Jun 29 23:29 oci-layout
drwxr-xr-x.  2 amurdaca amurdaca 4.0K Jun 29 23:29 refs

$ cat busybox-latest/refs/latest 
{"digest":"sha256:77293fa405fdc958b8e9ff8a0a98f9a42b719c97725f77263893707a3e1bea75","mediaType":"application/vnd.oci.image.manifest.v1+json","size":414}%                                                                                     $ cat busybox-latest/blobs/sha256-77293fa405fdc958b8e9ff8a0a98f9a42b719c97725f77263893707a3e1bea75 
{"schemaVersion":2,"mediaType":"application/vnd.oci.image.manifest.v1+json","config":{"digest":"sha256:2b8fd9751c4c0f5dd266fcae00707e67a2545ef34f9a29354585f93dac906749","mediaType":"application/octet-stream","size":1459},"layers":[{"digest":"sha256:8ddc19f16526912237dd8af81971d5e4dd0587907234be2b83e249518d5b673f","mediaType":"application/vnd.docker.image.rootfs.diff.tar.gzip","size":667590}],"annotations":null}%      

$ l busybox-latest/blobs 
total 668K
drwxr-xr-x. 2 amurdaca amurdaca 4.0K Jun 29 23:29 .
drwxr-xr-x. 4 amurdaca amurdaca 4.0K Jun 29 23:29 ..
-rw-rw-r--. 1 amurdaca amurdaca 1.5K Jun 29 23:29 sha256-2b8fd9751c4c0f5dd266fcae00707e67a2545ef34f9a29354585f93dac906749
-rw-r--r--. 1 amurdaca amurdaca  414 Jun 29 23:29 sha256-77293fa405fdc958b8e9ff8a0a98f9a42b719c97725f77263893707a3e1bea75
-rw-rw-r--. 1 amurdaca amurdaca 652K Jun 29 23:29 sha256-8ddc19f16526912237dd8af81971d5e4dd0587907234be2b83e249518d5b673f

[runcom]

lgtm