bash script: if condition not working as expected on AWS lambda container image

Question

I've a lambda function which uses container image(Docker) and the main function is written in bash. I am facing issue in my conditional logic:

if [[ $cur_cert == *"ca-cert"* ]]; then
      echo "CA-CERT"
    elif [[ $cur_cert == *"ssl-cert"* && $cur_cert == *"public"* ]]; then
      echo "SSL-CERT-PUBLIC"
    elif [[ $cur_cert == *"ssl-cert"* && $cur_cert == *"private"* ]]; then
      echo "SSL-CERT-PRIVATE"
    fi

This script is working perfectly fine on my local system. But on lambda it is not executing the code block under if/else even if the conditions are matching.

I'm using ubuntu as the base image for my Docker container. (FROM ubuntu)

Answer 1

Using a POSIX shell grammar rather than Bash dialect, ensures better compatibility with other shell interpreters:

case $cur_cert in
*ca-cert*) printf %s\\n CA-CERT ;;
*ssl-cert*) case $cur_cert in
  *public*) printf %s\\n SSL-CERT-PUBLIC ;;
  *private*) printf %s\\n SSL-CERT-PRIVATE ;;
  esac ;;
esac