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hclsyntax: Pass marks through template expressions #404

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merged 1 commit into from
Sep 24, 2020

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alisdair
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If a template expression interpolates values which have marks, we should apply all of those marks to the output value. This allows template expressions to function like native cty functions with respect to marks.

If a template expression interpolates values which have marks, we should
apply all of those marks to the output value. This allows template
expressions to function like native cty functions with respect to marks.
@alisdair alisdair requested review from pselle and a team September 22, 2020 19:24
@alisdair alisdair self-assigned this Sep 22, 2020
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🎉

`hello%{ if false } ${target}%{ endif }`,
&hcl.EvalContext{
Variables: map[string]cty.Value{
"target": cty.StringVal("world").WithMarks(cty.NewValueMarks("sensitive")),
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@azr azr Sep 23, 2020

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Howdy ! I was looking at this and nice !!! We are probably going to use that for Packer too :D.

Question: can an object or a list be sensitive ? I couldn't tell from the test here ex:

variable "foo" {
  default = { 
    key = "secret"
    value = "secret"
  }
  sensitive = true
}

( maybe it would be worth it to tests that too if that should work )

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I think that's our hope, although it's very much work in progress. Applying marks to complex values currently doesn't work reliably, and this specific case (assuming your interpolation is like "key=${var.foo.key}") will currently panic.

I'll be opening a follow-up PR for that issue, and should be able to add an interpolation test case then. Thanks!

@alisdair alisdair merged commit 4997e11 into hcl2 Sep 24, 2020
@alisdair alisdair deleted the alisdair/pass-marks-through-expression-templates branch September 24, 2020 17:53
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3 participants