hacky script to generate fpm rpms from sensu-admin Gemfile, using ruby bundled with sensu and ignoring already existing gems

gistfile1.sh

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# install sensu (epel rpms)

# you will also need some (all?) of sqlite-devel, mysql2-devel, rpm-build, libxslt-devel,libxml2-devel rpms

# use it's embedded gem to install bundler and fpm
mkdir /tmp/sensugems
/opt/sensu/embedded/bin/gem install --no-rdoc --no-ri -i /tmp/sensugems/ bundler
/opt/sensu/embedded/bin/gem install --no-rdoc --no-ri -i /tmp/sensugems/ fpm 

# Set GEM_PATH to include /tmp/sensugems
export GEM_PATH=/tmp/sensugems:$GEM_PATH

# Test it works - make sure ruby version is 2.0.0
/tmp/sensugems/bin/bundle env

# download sensu-admin.zip and extract to /tmp/sensu-admin-master

# Download gem deps for sensu-admin (this assumes you don't want mysql support)
mkdir /tmp/gems
/opt/sensu/embedded/bin/bundle install --path=/tmp/gems --gemfile=/tmp/sensu-admin-master/Gemfile --without mysql

# Remove gems that are already in sensu, as rpms built from them will clash
for file in /opt/sensu/embedded/lib/ruby/gems/2.0.0/cache/*; do rm -f /tmp/gems/ruby/2.0.0/cache/${file##*/}; done

# install mini_portile for nokogiri install
/opt/sensu/embedded/bin/gem install --no-rdoc --no-ri -i /tmp/sensugems/ mini_portile

# Create a 'sensugem' rpm for each needed gem - turn off deps or the rpms will depend on the 'built-in' gems in some cases
find /tmp/gems/ruby/2.0.0/cache -name '*.gem' | xargs -rn1 /tmp/sensugems/bin/fpm --no-auto-depends -d sensu -s gem -t rpm --gem-bin /opt/sensu/embedded/usr/bin --gem-gem /opt/sensu/embedded/bin/gem --gem-package-name-prefix sensugem