When running gem install I get the following:
gregoryostermayr@gregors test $ gem install jruby-boilerpipe
ERROR: Could not find a valid gem 'jruby-boilerpipe' (>= 0) in any repository
ERROR: Possible alternatives: boilerpipe, jruby-coercion, jruby_coercion
If I create a Gemfile and use bundler to install everything works as normal:
gregoryostermayr@gregors test $ bundle install
Fetching gem metadata from https://rubygems.org/.
Fetching version metadata from https://rubygems.org/
Resolving dependencies...
Installing jruby-boilerpipe 0.2.0.rc2
Network access doesn't seem to be an issue - trying from an MRI ruby installation results in the same. Anyone else ever see this?
The only versions of that gem currently available are “prerelease” gems, as the versions all end in rc1 or rc2.
To install it, use the --prerelease option to install (you can shorten this to just --pre:
$ gem intstall jruby-boilerpipe --pre
It appears that Bundler automatically installs prerelease gems if they are the only ones available.