all your gems for ruby 1.9.1

install_datamapper.sh

#!/bin/bash
# script for installing datamapper under ruby 1.9.1
#

# change this to your gem binary for ruby 1.9
GEM=`which gem1.9`

# don't mess with the file system
cd /tmp

# bcrypt gem does not work with 1.9, we have to use the sources
git clone git://github.com/genki/bcrypt-ruby.git
cd bcrypt-ruby
gem1.9 build *.gemspec
sudo gem1.9 install *.gem
cd ..
sudo rm -R bcrypt-ruby

# install all dependencies except json (which is now part of the stdlib)
sudo gem1.9 install dm-core dm-aggregates dm-migrations  \
  dm-serializer dm-timestamps dm-validations dm-cli \
  dm-is-tree dm-observer hoe

# install datamapper without dependencies (we already got those)
sudo gem1.9 install dm-types datamapper --ignore-dependencies 

# that's about it
exit