Provide `timeDuration` helper function

[endorama]

This issue stems from this comment

To avoid losing track of this as the PR gets merged lets use this issue to continue the discussion.

[aspacca]

template:

{{- $timeField := generate "timeField" }}
{{- $durationInSecond := generate "durationInSecond" }}
{{- $durationString := int64 $durationInSecond | duration }}
{{- $modifiedTime := $timeField | dateModify $durationString }}
{{ $timeField.Format "2006-01-02T15:04:05.999999Z07:00" }} | dateModify {{ $durationString }}
{{ $modifiedTime.Format "2006-01-02T15:04:05.999999Z07:00" }}

output:

2023-03-10T22:56:30.216696+09:00 | dateModify 14m59s
2023-03-10T23:11:29.216696+09:00

2023-03-10T23:27:25.216767+09:00 | dateModify 8m47s
2023-03-10T23:36:12.216767+09:00

2023-03-10T23:13:04.216802+09:00 | dateModify 14m28s
2023-03-10T23:27:32.216802+09:00

2023-03-10T23:05:37.216826+09:00 | dateModify 3m26s
2023-03-10T23:09:03.216826+09:00

2023-03-10T23:13:30.21685+09:00 | dateModify 9m47s
2023-03-10T23:23:17.21685+09:00

let's think about how we can reduce, with a function or something in the configuration, the following:

{{- $durationInSecond := generate "durationInSecond" }}
{{- $durationString := int64 $durationInSecond | duration }}
{{- $modifiedTime := $timeField | dateModify $durationString }}

[aspacca]

let's think about how we can reduce, with a function or something in the configuration, the following:

not really needed:

{{- $timeField := generate "timeField" }}
{{- $modifiedTime := $timeField | dateModify ( generate "durationInSecond" | int64 | duration ) }}
{{ $modifiedTime.Format "2006-01-02T15:04:05.999999Z07:00" }}

[aspacca]

I think we can indeed remove our custom timeDuration function, what do you think @endorama ?

[endorama]

Agree with removal, as we can leverage sprig functions. The only template using it at the moment is aws.vpcflow.

I'm going to close this issue (as it refers to adding it not to removing it :D) and proceed with removing timeDuration.