Switch Gemfile.lock when rvm use'ing another ruby

after_use_switch_gemfiles_copy

#!/usr/bin/env bash

# Place this file at ~/.rvm/hooks/after_use_switch_gemfiles
# and make it executable.
#
# This version copies Ruby-specific Gemfile.lock.x to Gemfile.lock.

if [ -e "Gemfile" ]; then
  . "${rvm_path}/scripts/functions/hooks/jruby"
  unset current_platform gemfile_platform

  if [[ "${rvm_ruby_string}" =~ "jruby" ]]; then
    current_platform="jruby"
  else
    current_platform="mri"
  fi

  if [ -e "Gemfile.lock" ]; then
    case $(sed -n '/^PLATFORMS/,/^$/ p' "Gemfile.lock" | sed '1d; /^$/d; s/\s*//') in
    java)
      gemfile_platform="jruby"
      ;;
    ruby)
      gemfile_platform="mri"
      ;;
    esac
  fi
  
  if [ -n "$gemfile_platform" -a -e "Gemfile.lock" ]; then
    /bin/cp -au "Gemfile.lock" "Gemfile.lock.${gemfile_platform}"
  fi
  if [ -n "$current_platform" -a -e "Gemfile.lock${current_platform}" ]; then
    /bin/cp -au "Gemfile.lock.${current_platform}" "Gemfile.lock"
  fi

  unset current_platform gemfile_platform
fi