Shell command to generate `variables.tf` file in terraform

Here is small script that can help generating the variables.tf file by reading other .tf files.

Warning, below command overwrites your current variables.tf file.

grep -oE "var\.(\w+)" main.tf | awk '!a[$0]++' | while IFS= read -r line; do echo $line | cut -d '.' -f 2 | awk '{print "variable \""$1"\" {\n  description = \"\"\n}\n"}' ; done > variables.tf