At least terraform wants all parameters passed via JSON to be strings.
It can't accept maps.
This means, allowing to pass a `argstr` JSON dict isn't really possible.
However, terraform is perfectly able to JSON-encode a map. So accept a
`argstr_json` argument instead, which `jq` will JSON-decode before
further processing it.
I dropped `argstr` support again so the jq expression still fits on my
screen, if anyone else (started) using this, I'm happy to review a CL
adding this. We should probably move the jq expression to some multiline
format then, though.
Change-Id: I5ab7a1169ab7305d3ab02db31c27732d9d1ab4e8
Reviewed-on: https://cl.tvl.fyi/c/depot/+/11228
Reviewed-by: tazjin <tazjin@tvl.su>
Tested-by: BuildkiteCI
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