Helper function datetime does not match documentation

[andreipoe]

The documentation page lists datetime as a helper with a single argument, e.g. {{datetime build.started}}, but the function expects 3 arguments:

Evaluation error: Helper 'datetime' called with wrong number of arguments, needed 3 but got 1

Looking at the source code in drone/drone-template-lib:template/helpers.go#L62, it looks like datetime should be called as, for example, {{ datetime build.started "15:04" "" }}. But build.started is an integer and datetime expects a float, resulting in the following error when called as previously exemplified:

Evaluation error: Helper datetime called with argument 0 with type int64 but it should be float64

It doesn't currently seem possible to pass a float value to datetime, so either a helper should be added to allow create converting integers to floats, or the datetime function should allow an integer to be passed in directly.

[tboerger]

In the meantime you could do a typecast, soon I will build a breaking change version which will include sane template helpers based on https://github.com/drone/funcmap, as this really kills all custom template strings this will be a new tagged release with a major version change.

[andreipoe]

Thanks. That sounds good.

How do you currently do typecasts in templates?

[waterdrop01]

Hi @tboerger

Same issue than @andreipoe

And here is my .drone.yml

- name: slack
    image: plugins/slack
    settings:
      webhook:
        from_secret: slack-drone-webhook
      channel: alert-drone
      link_names: true
      template: >
        {{#success build.status}}✅{{else}}🐞{{/success}} Build #{{build.number}} of {{repo.name}}@{{build.tag}}

        📝 `{{commit.message}}`
        🙇 {{commit.author}}

        🕐 {{datetime build.started "02.01.2006 15:04" "Europe/Berlin"}}

        🌐 {{build.link}}

Any idea how to cast int64 to float64 in the template?

Thanks!

[ErvalhouS]

Similar issue to #123 (comment)