# just a bash function
# file: src/bash/deploy/ubuntu/ubuntu-20.04.2-lts/check-install-perl-modules.func.sh
do_check_install_perl_modules(){

   cd $PRODUCT_DIR # this one is pre-defined in the beginning of your bash script - the proj root dir
   # define the local::lib dir
   local_perl5dir=~/perl5
   bash_opts_file=~/.bash_opts

   # bootstrap the cpan conf
   (echo yes;echo o conf prerequisites_policy follow;echo o conf commit)|cpan
   cat << EOF_CPAN_CONFIG | cpan
   o conf makepl_arg 'PREFIX=$local_perl5dir INSTALLMAN3DIR=$local_perl5dir/man/man3'
   o conf mbuild_arg '--install_base $local_perl5dir'
   o conf mbuild_install_arg '--install_base $local_perl5dir'
   o conf mbuildpl_arg '--install-base $local_perl5dir'
   o conf commit
EOF_CPAN_CONFIG
   perl -MCPAN -e 'install local::lib'

   curl -L http://cpanmin.us | perl - --self-upgrade -l $local_perl5dir App::cpanminus \
      && sudo chown -R $USER:$(id -gn) ~/.cpanm && sudo chown -R $USER:$(id -gn) $local_perl5dir
  
   # stored in the src/bash/deploy/ubuntu/ubuntu-20.04.2-lts/check-install-perl-modules.lst file
   modules="$(cat ${BASH_SOURCE/.func.sh/.lst})"
   while read -r module ; do use_modules="${use_modules:-} use $module ; "; done < <(echo "$modules");

   perl -e "$use_modules" || {
      echo "deploying modules. This WILL take couple of min, but ONLY ONCE !!!"
      curl -L cpanmin.us | perl - Mojolicious
      test "$(grep -c 'Mlocal::lib' $bash_opts_file)" -eq 0 && \
         echo 'eval $(perl -I$HOME/perl5/lib/perl5 -Mlocal::lib)' >> $bash_opts_file
      while read -r module ; do cpanm_modules="${cpanm_modules:-} $module " ; done < <(echo "$modules")
      cpanm --local-lib=$local_perl5dir local::lib && eval $(perl -I $local_perl5dir/lib/perl5/ -Mlocal::lib)
      cmd="cpanm --local-lib=$local_perl5dir $modules"
      set -x
      $cmd
      set +e
      }
}

#eof file: src/bash/deploy/ubuntu/ubuntu-20.04.2-lts/check-install-perl-modules.func.sh