Could not find gem 'logstash-devutils (>= 0) ruby' in any of the gem sources

Question

I'm just trying to learn to write the example-output-plugin,follow this page:

http://www.elastic.co/guide/en/logstash/current/_how_to_write_a_logstash_output_plugin.html#_clone_and_test_4

when I type the "bundle install" in the folder ~/logstash-output-example,I get the the error:

Could not find gem 'logstash-devutils (>= 0) ruby' in any of the gem sources listed in your Gemfile or installed on this machine.

it seems the gem 'logstash-devutils (>= 0) ruby' missed,but when I type the "sudo gem install logstash-devutils", I get the error

ERROR: Could not find a valid gem 'logstash-devutils' (>= 0)

Here is why:

Found logstash-devutils (0.0.12), but was for platform java

Anyone else can help me?

environment:MAC OSX 10.9.5

Answer 1

I just ran into the same problem. Solved it by just downloading the gem via the download link on its rubygems.org page and installing it with:

sudo gem install logstash-devutils-0.0.13-java.gem

That worked for me.

Update: Well, that will install the gem but it will not solve the real problem. I needed to switch to jruby for the tutorial to work. This can be done via the RVM:

sudo rvm install jruby

Answer 2

I tried installing the gem manually and got a different error:

There was a RuntimeError while loading logstash-devutils.gemspec: Only JRuby is supported from /Users/bnewton/.rvm/gems/ruby-2.2.1/bundler/gems/logstash-devutils-15c59bfaab59/logstash-devutils.gemspec:2:in `'

This leads me to believe the logstash-devutils requires jruby rather than the usual ruby. I use rvm, so it was a matter of installing and using jruby instead of regular ruby. So if you are using rvm, run:

rvm install jruby-1.7.19
rvm use jruby-1.7.19
gem install bundler
bundle install

This fixed it for me, and I was able to run bundle install without error.