install_plenv.sh

#!/usr/bin/env bash

perl_version='5.25.6'
perl_version='5.24.0'

verify_pkg() {
  pkg="$1"
  [[ $(which "${pkg}") ]] || {
    echo "${pkg} not found.  Exiting..."
    exit 1
  }
}

verify_pkg gcc
verify_pkg git
verify_pkg curl

[[ ! -f "$HOME/.plenv/README.md" ]] && {
  git clone git://github.com/tokuhirom/plenv.git ~/.plenv
} || {
  echo "****** plenv already installed"
}

bashrc_plenv[0]='export PATH="$HOME/.plenv/bin:$PATH"'
bashrc_plenv[1]='eval "$(plenv init -)"'

cx=0
changed=0
for content in "${bashrc_plenv[@]}"; do
  [[ $(grep "${content}" "${HOME}/.bashrc") ]] && {
    echo "****** ${cx}: .bashrc already updated."
  } || {
    echo "****** ${cx}: not in bashrc yet"
    echo "${content}" >> "${HOME}/.bashrc"
    changed=1
  }
  cx=$((cx+1))
done


[[ ! -f "$HOME/.plenv/plugins/perl-build/README.md" ]] && {
  git clone git://github.com/tokuhirom/Perl-Build.git ~/.plenv/plugins/perl-build/
} || {
  echo "****** perl-build already installed into plenv"
}


#[[ $changed == 1 ]] && {
#  echo "Restart your shell as a login shell so the path changes take effect. You can now begin using plenv."
#  echo
#  echo "  you can manually run:"
#  echo "    exec $SHELL -l"
#  echo 
#  echo "To initialize perl and cpanminus, e.g.:"
#  echo "plenv install 5.24.0"
#  echo "plenv global 5.24.0"
#  echo "plenv install-cpanm"
#}

[[ $changed == 1 ]] && {
  exec $SHELL -l
}

plenv_global_ver=$(plenv global)

[[ $plenv_global_ver == "${perl_version}" ]] && {
  echo "****** Perl ${perl_version} already installed"
} || {
  echo "****** Installing perl ${perl_version}"
  plenv install "${perl_version}"
  echo "****** Making perl ${perl_version} global"
  plenv global "${perl_version}"
} 

[[ $(which cpanm) ]] && {
  echo "****** cpanm already installed into perl ${perl_version}"
} || {
  echo "****** Installing cpanm into perl ${perl_version}"
  plenv install-cpanm
}