grab_gem_repo.sh

#!/bin/sh

gem_dir=/tmp/gem-grab
gem_repo=http://my.gem.repo

set -e

gem list --source $gem_repo -r -a -u --prerelease | awk '/^[a-z]/' | while read t1
do
  name=`echo $t1 | perl -n -e '/^([^\s]+)/ && print $1'`
  echo $t1 | perl -n -e '/\((.*)\)/ && print $1' | tr ',' '\n' | sed 's/^ //' | while read version
  do
    echo Fetching $name $version
    GEM_HOME=$gem_dir gem install --source $gem_repo --no-ri --no-rdoc --ignore-dependencies -v $version $name
  done
done

zip -j gems.zip $gem_dir/cache/*.gem