Automatically find the latest released version of opencloud

[dragotin]

Description

So far the latest version of the rolling release was hardcoded in the script, which outdates often.

With this improvement it queries the github api for the latest release and uses the version number from there as default.

[ScharfViktor]

Lgtm 👍

[micbar]

@dragotin Sorry to be late, but that change creates the requirement, that jq is installed at the target system. I think that should be documented.

[dragotin]

Very good point - that is not acceptable :-/ I will see if I find a way to do it without jq. Thanks

[ScharfViktor]

@dragotin Sorry to be late, but that change creates the requirement, that jq is installed at the target system. I think that should be documented.

Maybe use grep?

function get_latest_version() {
    latest_version=$(curl -s https://api.github.com/repos/opencloud-eu/opencloud/releases/latest \ 
    | grep '"tag_name":' \ -> "tag_name": "v2.1.0"
    | awk -F: '{print $2}' \ -> "v2.1.0"
    | tr -d ' ",v') -> 2.1.0
}

[ScharfViktor]

#699