Add support for std.trace()

[david-raine]

It can be very difficult to debug errors in jsonnet code when called from a terraform module and the std.trace() function in jsonnet does not appear to be surfaced to the terraform space. Could this be added?

[alxrem]

Hello.

Try version 2.4.0. For example:

terraform {
  required_providers {
    jsonnet = {
      source  = "alxrem/jsonnet"
      version = "~> 2.4"
    }
  }
}

data "jsonnet_file" "default" {
  content = <<EOF
  {
    a: std.trace("str", "rest"),
  }
  EOF
}

output "json" {
  value = data.jsonnet_file.default.rendered
}

output "trace" {
  value = data.jsonnet_file.default.trace
}

> terraform apply -auto-approve 
data.jsonnet_file.default: Reading...
data.jsonnet_file.default: Read complete after 0s [id=05502b56511b3669cd6a57e43ab217cbb982dbc2c6dd5ac32b5d937a641eccef]

No changes. Your infrastructure matches the configuration.

Terraform has compared your real infrastructure against your configuration and found no differences, so no changes are needed.

Apply complete! Resources: 0 added, 0 changed, 0 destroyed.

Outputs:

json = <<EOT
{
   "a": "rest"
}

EOT
trace = <<EOT
TRACE: data:2 str

EOT

[david-raine]

Thanks Alexey! Is it possible to surface trace() function output under error condition, when the message "Failed to render test from jsonnet template" occurs?

[alxrem]

Yes. Try 2.4.1.