The rsruby gem is required for RDS Exporter showcase. Here's the Travis CI equivalent for installing the rsruby gem -

sudo apt-get install -y libgsl0-dev r-base r-base-dev
sudo Rscript -e "install.packages(c('Rserve','irr'),,'http://cran.us.r-project.org')"
R CMD Rserve
export R_HOME=/usr/lib/R
gem install rsruby -- --with-R-dir=$R_HOME --with-R-include=/usr/share/R/include --with_cflags="-fPIC -g -O2 -fstack-protector --param=ssp-buffer-size=4 -Wformat -Wall -fno-strict-aliasing"

However, the above doesn't seem to work with heroku run <statement> console calls.

We fixed similar error with Highcharts and nyaplot by adding it as add_runtime_dependency in gemspec. But data_tables is added in gemfile fetching from github repo in daru-view. There must be a good way to write it as run time dependency in gemfile.

I have added daru and daru-io in gemfile : https://github.com/Shekharrajak/daru_examples_io_view_rails/blob/master/Gemfile#L9

After running bundle and rails server, I get -- cannot require google_visualr error. Adding it to the Gemfile seems to fix this though.

Importing from real-time (with small lag maybe) stock market data, from a website source like moneycontrol would be cool to demonstrate the HTML Importer.

Currently, all IO related gems like spreadsheet, jsonpath, etc. are grouped under the optional group of Gemfile. They were intended to be here and not in the gemspec file due to partial-requiring use-cases. Have a look at SciRuby/daru-io#25 for more details.

Rather than adding all these dependencies to this Rails app's Gemfile, would it be possible (and better) to add the gems from daru-io's Gemfile?

Ping @Shekharrajak