Machine readable format of DVC status

Hi guys, can we have machine readable output format option for dvc status, for example:

dvc status --json

{
    "stages": [
        {
            "name":    "path/to/a.txt.dvc",
            "deps_changed": ["path/to/b.txt.dvc"],
            "outs_changed": [],
            "callback": False,
            "checksum_changed": True
        },
        {
            "name":    "path/to/b.txt.dvc",
            "locked": True
        }
    ]
}

I don’t think it will be needed for other commands, at least for now - we can show dvc console output for user actions such as dvc repro.

[hdcasti]

Hello! So, I think this is a very useful feature to implement, because it gives the possibility to use it for integrations in IDEs, which is my case. Since I’m developing a plugin that makes use of dvc, it would be very interesting to have the possibility to run the dvc status and create a file with the output as you do when creating dvc pipelines. I also think that you should use YAML (like you do in .dvc files) or JSON so that it can be easily parsed in different languages (for example, I am making my java plugin).

[prihoda]

Moving the discussion here: https://github.com/iterative/intellij-dvc-support-poc/issues/1