Script to install local lib CPAN modules, just tell it what to install in the MODULES variable and the rc file to setup for perl local lib environment variables so it can find the locally installed modules

CPAN_module_installer.sh

#!/bin/bash

# Customize variables:
RCFILE=~/.bashrc
MODULES=( 
  "XML::Simple"
  "DateTime::Event::Cron"
  "Switch"
  "LWP::Simple"
)

function cpan_local_lib_setup {
  RCFILE=$1

  if ( ! perl -Mlocal::lib 1>&2 > /dev/null ) ; then
    sudo perl -MCPAN -e 'install local::lib';
  fi;
  if ( ! grep -q 'local::lib' $RCFILE ) ; then
    echo "Setting up $RCFILE Perl local::lib environment variables"
    echo 'eval "$(perl -I$HOME/perl5/lib/perl5 -Mlocal::lib)"' >> $RCFILE
  fi;
}

function cpan_local_install {
  if ( perl -Mlocal::lib -M$1 -we 1 ) ; then
    echo $1 "already installed."
  else
    echo "Cannot find module $1 installed" 1>&2
    perl -MCPAN -Mlocal::lib -e "install $1"
  fi
}

# MAIN RUN
cpan_local_lib_setup $RCFILE && {
  for module in "${MODULES[@]}"; do
    cpan_local_install $module
  done;
}