Travis CI won't install eventmachine? - ruby

Question

I'm just getting started with CI on my open-source project, and it's all going swimmingly, however Travis is continually failing when it gets to pieces of code that require eventmachine. Eventmachine is specified in the gemspec as both runtime and development dependency (same as wisper), but Travis will not install Eventmachine, causing every build to fail - however, it does install wisper. What's going on? :(
Most recent build that failed
GemSpec Dependencies
..
spec.add_development_dependency 'bundler', '~> 1.5'
spec.add_development_dependency 'rake'
spec.add_development_dependency 'rspec', '~> 2.4'
spec.add_development_dependency 'wisper'
spec.add_development_dependency 'eventmachine'
spec.add_runtime_dependency 'wisper'
spec.add_runtime_dependency 'eventmachine'
Travis YML
rvm:
- 1.9.3
# we don't support 1.9.2
# - 1.9.2
- jruby
- rbx
script: "bundle exec rake"
Rake default task
require 'rspec/core/rake_task'
RSpec::Core::RakeTask.new :spec
task :default => :spec
Log
$ gem --version
2.2.2
$ bundle --version
Bundler version 1.5.3
Applying fix for NPM certificates
install
$ bundle install --deployment
Fetching gem metadata from https://rubygems.org/.........
Fetching additional metadata from https://rubygems.org/..
Installing rake (10.1.1)
Installing wisper (1.3.0)
angler at /home/travis/build/DanPantry/angler did not have a valid gemspec.
This prevents bundler from installing bins or native extensions, but that may not affect its functionality.
The validation message from Rubygems was:
duplicate dependency on wisper (>= 0), (>= 0) use:
add_runtime_dependency 'wisper', '>= 0', '>= 0'
Using angler (0.0.1) from source at .
Installing timers (1.1.0)
Installing celluloid (0.15.2)
Installing nio4r (1.0.0)
Installing celluloid-io (0.15.0)
Installing diff-lcs (1.2.5)
Installing formatador (0.2.4)
Installing rb-fsevent (0.9.4)
Installing rb-inotify (0.9.3)
Installing listen (2.7.1)
Installing lumberjack (1.0.4)
Installing thor (0.18.1)
Installing guard (2.5.1)
Using bundler (1.5.3)
Installing guard-bundler (2.0.0)
Installing rspec-core (2.14.8)
Installing rspec-expectations (2.14.5)
Installing rspec-mocks (2.14.6)
Installing rspec (2.14.1)
Installing guard-rspec (4.2.8)
Cannot write a changed lockfile while frozen.
Your bundle is complete!
It was installed into ./vendor/bundle
$ bundle exec rake
/home/travis/.rvm/rubies/ruby-1.9.3-p484/bin/ruby -S rspec ./spec/remote_spec.rb
/home/travis/build/DanPantry/angler/lib/angler.rb:5:in `require': cannot load such file -- eventmachine (LoadError)
NOTE: Even without add_runtime_dependency, Travis just won't install EventMachine.

Answer 1

The important part of your log is this
angler at /home/travis/build/DanPantry/angler did not have a valid gemspec.
This prevents bundler from installing bins or native extensions, but that may not affect its functionality.
The validation message from Rubygems was:
duplicate dependency on wisper (>= 0), (>= 0) use:
add_runtime_dependency 'wisper', '>= 0', '>= 0'
Fix your gemspec, then bundler can install gems specified there. I simple solution would be to remove the development dependency to wisper and rely solely on the runtime_dependency for it.