locals {
  org    = "acme"
  prj    = "rockets"
  env    = "staging"
  suffix = "01234"
}

resource "azurerm_resource_group" "example" {
  name     = # Value on next line for readability
regex("^[-\\w\\._\\(\\)]+$",substr("rg-${local.org}-${local.prj}-${local.env}-main-${local.suffix}", 90))
  location = "eastus"
}