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Terraform Utility Modules 0.10.8Last updated in version 0.9.6

List Remove Module

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This is a module that can be used to remove items in a given list from another list. This functionality is not yet available as an interpolation function.

For example, suppose you have a list of availability zones (["us-east-1a", "us-east-1b", "us-east-1c", "us-east-1d", "us-east-1e"]) and you want to remove specific zones that don't support the features you need (["us-east-1b", "us-east-1c"]). You can use this module:

module "list_remove" {
  source = "git::git@github.com:gruntwork-io/terraform-aws-utilities.git//modules/list-remove?ref=v0.0.8"

  original_list = ["us-east-1a", "us-east-1b", "us-east-1c", "us-east-1d", "us-east-1e"]
  items_to_remove = ["us-east-1b", "us-east-1c"]
}

output "output_list" {
  value = "${module.list_remove.output_list}"
}

The output new_list should be the list ["us-east-1a", "us-east-1d", "us-east-1e"].

NOTE: This will dedup the input list due to the way it is implemented. This module will not work if you are expecting duplicate items to remain.

Example code​

See the list-remove example for working sample code.

Sample Usage​

main.tf

# ------------------------------------------------------------------------------------------------------
# DEPLOY GRUNTWORK'S LIST-REMOVE MODULE
# ------------------------------------------------------------------------------------------------------

module "list_remove" {

  source = "git::git@github.com:gruntwork-io/terraform-aws-utilities.git//modules/list-remove?ref=v0.10.8"

  # ----------------------------------------------------------------------------------------------------
  # REQUIRED VARIABLES
  # ----------------------------------------------------------------------------------------------------

  # The list of items that you want to remove from the original list.
  items_to_remove = <list(any)>

  # The list of items where you want to remove items from.
  original_list = <list(any)>

}


Reference​

Required​

items_to_removelist(any)required

The list of items that you want to remove from the original list.

Any types represent complex values of variable type. For details, please consult `variables.tf` in the source repo.
original_listlist(any)required

The list of items where you want to remove items from.

Any types represent complex values of variable type. For details, please consult `variables.tf` in the source repo.