redis-scan-das-ruas.sh

#!/bin/bash
#
# Simple wrapper of Redis' SCAN command. It can control batch size, patterns and cursors.

if [ $# -ne 3 ]
then
  echo "Find matching a pattern using SCAN "
  echo "Usage: $0 <host> <port> <pattern>"
  exit 1
fi

cursor=-1
keys=""

loops=0
while [ $cursor -ne 0 ]; do
  if [ $cursor -eq -1 ]
  then
    cursor=0
  fi

  reply=`docker run -it --rm --net=host redis:alpine redis-cli -h $1 -p $2 SCAN $cursor COUNT 10000 MATCH $3`
  cursor=$(echo "$reply" | head -n1 | grep -o '[0-9]*[0-9]\{2,\}')

  keys=$(echo "$reply" | tail -n $((($(echo "$reply" | wc -l) - 1))) | awk '{ print $2 }' | grep -oP '(?<=").*(?=")')

  if [[ $keys != "" ]]
  then
    echo "$keys"
  fi
  loops=$(( loops + 1 ))
done
echo "loops : $loops"