Add support to custom list of distros

[seocam]

My use case for kvm-install-vm is to perform test run in multiple versions of a given distro (centos, fedora and rhel). While I don't think it would make sense to create a PR to add centos-1611, centos1811, centos1907, etc., those names are meaningful and helpful in my tests.

For that reason I'd like to suggest that the mapping of distros could be customized in .kvirc or somewhere else.

Thanks!

[giovtorres]

Would you be able to walk me through how you would implement this feature?

[seocam]

There probably many ways it could be done. One example would be to take an argument of a json file with the distro definition and parse it using jq (available in most debian-based and rpm-based distros).

For this file:

{
    "centos8": {
        "qcow": "CentOS-8-GenericCloud-8.1.1911-20200113.3.x86_64.qcow2",
        "os_variant": "centos8",
        "image_url": "https://cloud.centos.org/centos/8/x86_64/images",
        "disk_format": "qcow2",
        "login_user": "centos"
    }
}

You could read the settings like this:

$ cat distros.json | jq .centos8.qcow
"CentOS-8-GenericCloud-8.1.1911-20200113.3.x86_64.qcow2"

I've made this gist with all "distro variables" read using jq: https://gist.github.com/seocam/e0e6ff8e4b2b26884cda1ca046ec5921