Fix Image Name in Manifest for Docker v1.10.0 images

[bbickerton]

Older exported docker images, such as those made by docker 1.7.0, contain several layer directories and a repositories file. That file is a short JSON object holding the repo name, tag, and hash.

{
    "tauzero/test-loop": {
        "latest": "a8967fd6aec812a6795ffe4953d416532b3866e168f60066a241d08ba700998e"
    }
}

When we import docker images from the image service, the repositories file is updated with the assigned uuid name using the fixRepositoriesFile function.

New exported images, such as those made by docker 1.10.0 include an additonal file, the manifest.json

[{
    "Config": "8f898785cff843b9ab330ed35924c1d72bc7a37e66386232e3d95027f2b6659d.json",
    "RepoTags": ["tauzero/test-loop:latest"],
    "Layers": ["768d4f50f65f00831244703e57f64134771289e3de919a576441c9140e037ea2/layer.tar", "b3bbc4636fc59ec067f4a877899f2e008bf3e2fe55451ef78c090dd9709b3818/layer.tar", "1743d7c353b09160d6c8bc8f7cea2fcdbeaea2330d98f14ab723757ee5f16e38/layer.tar", "5634dce3a0081ec88be6e9dc149829a775b11b94bf2116f822a7bd688a99aaea/layer.tar", "92abfeb6712856ca6c60039d7eded949de973d2c8209516a68cee4ab7088f223/layer.tar", "ace0fd45046091a3b90d0d7f22aa6333ea350875532ee3ee95eb0cd74fe278eb/layer.tar"]
}]

Simply updating the repositories is no longer enough; I believe it is left in for backward compatibility. The manifest.json file will also need to be updated, specifically the RepoTags property, for this to work with the latest docker.

[amoghe]

@Tauzero could you point me to the official specification for this manifest file? I can't seem to find where this new file is documented.

[bbickerton]

I'll see if I can find it. I got the above information from exporting an image with older and newer versions of docker and checking the exported contents. Interesting that descriptions of a "manifest" that I can find so far don't follow the format that export gave me.