Use GoTemplate

[speedfl]

Summary

In ArgoCd I implemented usage of GoTemplate for ApplicationSet. Purpose is to do the same in workflow

https://github.com/argoproj/argo-cd/pull/10026

Use Cases

It will be useful in all complex case needing advanced templating features.

Work done with expressions is going in this direction.

Here is an example: examples/expression-reusing-verbose-snippets.yaml

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[callmetushar123]

Hey I would like to work on this issue please assign it to me.

[alexec]

I don't think this is the right direction. Templating in Argo Workflows is hard to use because (a) we use a mixture of technologies and (b) the evaluation point is non-deterministic.

Adding a new technology to the mix will not help.

[alexec]

Adendmum, to fix both (a) and (b) we need to converge on one techonlogy, which is expr and, wherever we might need to evaluate something, allow the user to define the expression and add it. Example is this:

https://github.com/argoproj/argo-workflows/blob/3a3f1599718453ca79800cfc28f6631ee780911b/pkg/apis/workflow/v1alpha1/workflow_types.go#L452