Support docker bundles format as input

[sebgoa]

No description provided.

[ngtuna]

moby/moby#23522

[ngtuna]

There is an issue with package github.com/docker/docker/api/client/bundlefile: at this moment it is marked // +build experimental. That means go can't see it as a normal lib thus the building is fail.

$ go build -o kompose2 ./cli/main  
cli/app/app.go:30:2: no buildable Go source files in ...github.com/docker/docker/api/client/bundlefile

[sebgoa]

I think this library allows you to generate bundles from compose file. We might add that.

But what we want is to be able to take a bundle and transform it into k8s primitives. It might be tricky because the image reference in a bundle is the sha of the layer...and not the image tag (which is not immutable).

[ngtuna]

No Sebastien, that lib supports us to take a dab file and parse to Bundlefile struct. Then we are able to map to k8s objects.

Yes you're right. Image reference would be a tricky point.

[sebgoa]

ok good to know.

as a first pass, we might just extract an image name from docker hub and use the latest tag. Since k8s does not support referencing specific layers in the image field.

[ngtuna]

Working on dab-support branch

[ngtuna]

@Runseb Figure out the current revision of libcompose is too old in order to support mapping bundles fields to compose fields then to k8s primitives... This's such a pain if we keep enforcing it. I'm going to level up libcompose revision. It should be good as we can solve #11 in the meantime.

[sebgoa]

you mean update the godeps hash for lib compose ?
will this break the current code ?

[ngtuna]

Correct. No it doesn't harm the current code much. But I keep master branch stable and mainly work in separate dab-support branch. Then we can decide to merge when it done.

[ngtuna]

Closed by 91d9818