Follow XDG Base Directory specification for clusterctl configuration file(s)

[pavel-github]

Instead of polluting user $HOME directory, it would be better UX to follow XDG Base Directory specification and keep configuration files under $HOME/.config/cluster-api/*.

Since clusterctl uses Viper to load configuration (https://github.com/kubernetes-sigs/cluster-api/blob/main/cmd/clusterctl/client/config/reader_viper.go#L63), we can add an additional configuration directory to not break an existing behavior.

Technical details:

• Go library for getting XDG folders: https://github.com/adrg/xdg

Let me know if the idea is worth, so I could provide a PR.

[killianmuldoon]

Generally issues are a better venue for bringing up ideas like this.

There is already a PR open for this: #6913. The issue thus far has been reviewer bandwidth more than anything.

[pavel-github]

@killianmuldoon , thanks for the answer (for some reason GitHub search didn't catch it when I was searching 😄).
I'm going to close this topic.