Fix plugin config init config template

[max-frank]

WHAT

Add dummy InitConfig to dummy test to force init config templating logic to run.
Fix the PluginConfigInfo InitiConfig templating to use exported function and directly call it.

This fix is necessary to for example test Falco rules using this pkg when plugins such as the k8smeta plugin are required as the plugin has a few required init config fields.

WHY

The go template logic requires the the field to be exported in order to be able to render it. For unexported fields we otherwise see an error like this:

template: :7:27: executing "" at <$p.initConfigString>: can't evaluate field initConfigString in type *falco.PluginConfigInfo

Similarly it seems that for struct functions evaluating to string the template pkg seems to treat them as fields. So using the call keyword results in the below error:

template: :7:20: executing "" at <call $p.InitConfigString>: error calling call: non-function $p.InitConfigString of type string

Thus fixing this requires exporting the function and removing the call keyword. This can be verified by running the TestDummy_PrometheusMetrics test while 1e56096 is checked out.

[leogr]

Nice catch! Thank you

/approve

[poiana]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: leogr, max-frank

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[poiana]

LGTM label has been added.

Details

Git tree hash: 3c7367ee1fb25198adb34dc57f52bee21296a878