Delete log groups matching a specific pattern and other filter criteria

aws_log_cleanup.sh

#!/bin/bash

## Log groups must match ALL these criteria to be processed
log_name_include="$1" #Only logs containing this string in their name will be included
region="${2:-"eu-west-1"}"
retention_period_filter="400" #Logs with this retention period will be excluded

log() { printf "\n%b" "$*"; }
define_colors_for_logging() {
  err="\e[48;5;1m"
  highlight="\e[1;33;46m"
  reset="\e[0m"
  header="\e[0;33m"
}
define_colors_for_logging

delete_log_no_prompt() {
  local log_name="$1"
  log "Deleting ${highlight}$log_name${reset}"

  if output="$(aws logs delete-log-group --region "$region" --log-group-name "$log_name" 2>&1)"; then
    log "Deleted ${highlight}$log_name${reset}\n(Exit Code)Output:($?)$output"
  else
    log "Error while deleting ${highlight}$log_name${reset}\nExit Code: ${err}$?${reset},\n Output:${err}$output${reset}"
  fi
}

delete_log_group() {
  local log_name="$1"

  log "Do you want to delete log-group ${highlight}$log_name${reset}\n"
  select answer in "Yes" "No(Skip)" "Abort"; do
    case $answer in
    Yes)
      delete_log_no_prompt "$log_name"
      break
      ;;
    'No(Skip)')
      log "Skipped deleting of ${highlight}$log_name${reset}\n\n"
      break
      ;;
    Abort)
      echo "Eeeeeeeks! Abort abort!"
      exit
      ;;
    esac
  done </dev/tty
}

if output="$(aws logs describe-log-groups --output json --query "logGroups[?retentionInDays!=\`$retention_period_filter\` &&  contains(logGroupName,\`$log_name_include\`)].logGroupName" --region "$region" | jq -r '.[]' | grep "$log_name_include")"; then

  ## Create an array from output
  IFS=$'\n' read -r -d '' -a log_groups_arr <<<"$output"

  log_group_count=${#log_groups_arr[@]}
  log "Found $log_group_count log groups matching criteria: Log name contains ${err}$log_name_include${reset} and retention days != ${highlight}$retention_period_filter${reset}\n"
  echo "${log_groups_arr[*]}" | tr ' ' '\n' | nl -w2 -s'>'

  log "${header}Deleting one by one with prompt for confirmation${reset}\n\n"
  ## now loop through the above array
  COUNTER=1
  for log_name in "${log_groups_arr[@]}"; do
    log "\n\n$COUNTER> ${highlight}$log_name${reset}"
    delete_log_group "$log_name"
    COUNTER=$((COUNTER + 1))
  done

else
  log "No log found matching the name provided,\nOutput: ${err}$output${reset}"
fi