RUM Count for tfstate

count.sh

#!/bin/bash
#
# Usage: Pass in a Terraform State file through a pipe
# e.g.
# cat terraform.tfstate | count.sh


# For each resource in the TF State file...
# we only count managed resources (i.e. not data sources)
# we explicitly ignore null resources (terraform_data and null_resource)
# we count all instances of a resource (for those resources defined with count or for_each)
# then flatten the whole thing into a list and count the number of items
jq '[
  .resources[] |
  select(.mode == "managed") |
  select(.type == "terraform_data" or .type == "null_resource" | not) |
  .instances |
  flatten[]
] | length'