Setting default_tags with dynamic information

Terraform Providers AWS
1

I’d like to set “Environment = local.environment_name” in resources without having to repeat lots of code. Default tags seemed to be the correct solution, and I was wondering if anyone knows of a better way to set a dynamic tag.

provider "aws" {
  default_tags {
    tags = {
      Environment = "Default"
      Owner = "my_department"
    }
  }
}

resource "aws_ssm_parameter" "tag-tester-parameter" {
  name      = "/test/tag-tester-parameter"
  type      = "StringList"
  value     = "parameter1, parameter2"
  overwrite = false

  tags = {
    Name        = "/test/tag-tester-parameter"
    Environment = local.environment_name
  }
}

Those 2 together will correctly set the “Environment” tag to “Dev”.

But I don’t want to repeat myself across hundreds of resources, and any changes needed to that tag would require me updating all those hundreds of resources.

Is there a way to set Environment to Dev without repeating myself across resources?