source 'https://rubygems.org' gemspec logstash_path = ENV["LOGSTASH_PATH"] || "../logstash" use_logstash_source = ENV["LOGSTASH_SOURCE"] && ENV["LOGSTASH_SOURCE"].to_s == "1" if Dir.exist?(logstash_path) && use_logstash_source gem 'logstash-core', :path => "#{logstash_path}/logstash-core" gem 'logstash-core-plugin-api', :path => "#{logstash_path}/logstash-core-plugin-api" end