fix(filter-region): Support comma separated regions (prowler-cloud#1071)

* regions separated by a comma deliminator

* Update README.md

Co-authored-by: Toni de la Fuente <[email protected]>

* Update README.md

Co-authored-by: David Childs <[email protected]>
Co-authored-by: Pepe Fagoaga <[email protected]>
Co-authored-by: Toni de la Fuente <[email protected]>

Author: 3 people

README.md

@@ -230,7 +230,7 @@ Prowler has been written in bash using AWS-CLI underneath and it works in Linux,
 
 By default, Prowler scans all opt-in regions available, that might take a long execution time depending on the number of resources and regions used. Same applies for GovCloud or China regions. See below Advance usage for examples.
 
-Prowler has two parameters related to regions: `-r` that is used query AWS services API endpoints (it uses `us-east-1` by default and required for GovCloud or China) and the option `-f` that is to filter those regions you only want to scan. For example if you want to scan Dublin only use `-f eu-west-1` and if you want to scan Dublin and Ohio `-f 'eu-west-1 us-east-s'`, note the single quotes and space between regions.
+Prowler has two parameters related to regions: `-r` that is used query AWS services API endpoints (it uses `us-east-1` by default and required for GovCloud or China) and the option `-f` that is to filter those regions you only want to scan. For example if you want to scan Dublin only use `-f eu-west-1` and if you want to scan Dublin and Ohio `-f eu-west-1,us-east-1`, note the regions are separated by a comma deliminator (it can be used as before with `-f 'eu-west-1,us-east-1'`).
 
 ## Screenshots
 

prowler

@@ -348,7 +348,7 @@ TOTAL_CHECKS=($(echo "${TOTAL_CHECKS[*]}" | tr ' ' '\n' | awk '!seen[$0]++' | so
 # Function to get all regions
 get_regions() {
   # Get list of regions based on include/whoami
-  REGIONS=$($AWSCLI ec2 describe-regions --query 'Regions[].RegionName' --output text $PROFILE_OPT --region $REGION_FOR_STS --region-names $FILTERREGION 2>&1)
+  REGIONS=$($AWSCLI ec2 describe-regions --query 'Regions[].RegionName' --output text $PROFILE_OPT --region $REGION_FOR_STS --region-names ${FILTERREGION//[,]/ } 2>&1)
   ret=$?
   if [[ $ret -ne 0 ]]; then
     echo "$OPTRED Access Denied trying to describe regions! Review permissions as described here: https://github.com/prowler-cloud/prowler/#requirements-and-installation $OPTNORMAL"