Adding type constraints to variables

[lpena-recurly]

For best practices and for users who implement terragrunt [0]. Type constrains should be added [1]. Without specifying these constraints, applying a terragrunt plan/apply results in type errors [2], depending on the type constraints.

In terragrunt, "values are being passed in with environment variables and json, the type information is lost when crossing the boundary between Terragrunt and Terraform. You must specify the proper type constraint on the variable in Terraform in order for Terraform to process the inputs to the right type" [3].

tl;dr lists and maps currently do not work with terragrunt because type constraints are not explicitly set.

[0] https://github.com/gruntwork-io/terragrunt
[1] https://www.terraform.io/docs/configuration/variables.html#type-constraints
[2] Invalid value for "inputMap" parameter: lookup() requires a map as the first
argument.
[3] https://terragrunt.gruntwork.io/docs/reference/config-blocks-and-attributes/#inputs

[morgante]

Thanks for the addition, just one change and also please regenerate docs (make docker_generate_docs).

[lpena-recurly]

Thanks for the addition, just one change and also please regenerate docs (make docker_generate_docs).

should be all good now.

[morgante]

Thanks for the contribution!

[lpena-recurly]

Thanks for the contribution!

No problem!