Could not find eventmachine-1.2.5 in any of the sources

[ltfschoen]

I get the following error when trying to run a Rails Server with rails s using a Rails 5.1.3 app with Ruby 2.4.2 and RubyGems 2.6.13 and macOS Sierra 10.12.6

$ rails s
Could not find eventmachine-1.2.5 in any of the sources
Run `bundle install` to install missing gems.

I have the following in my Gemfile

group :development, :test do
  gem 'eventmachine', '1.2.5'
  gem 'guard', '~> 2.14.1'
  gem 'guard-rspec', '~> 4.7.3'
  gem 'guard-livereload', '~> 2.5.2'
end

I have tried gem install eventmachine -v '1.2.5, running gem list shows eventmachine (1.2.5), and confirmed the gempath with gem env

I have tried using previous versions of Ruby 2.4.1, previous versions of eventmachine gem, and numerous other alternatives.

[ltfschoen]

Below is a solution that I hacked together that fixed the problem in my Rails project called Guard Demo repo here https://github.com/ltfschoen/guard_demo where I am using Rails 5.1.3 app with Ruby 2.4.2 and RubyGems 2.6.13 and macOS Sierra 10.12.6 and PostgreSQL and wanted to use both Guard RSpec Gem and Guard LiveReload Gem

• Using RBEnv I switched to latest Ruby Version
  rbenv global 2.4.2; rbenv shell 2.4.2

• Then I added Guard LiveReload to Gemfile
  group :development, :test do gem 'guard-livereload', '~> 2.5', require: false end

• Then I installed dependencies
  bundle install

  • Generate LiveReload config files

    bundle exec guard init livereload
    

• But when I tried to run the Rails server with rails s it gave error:

  Could not find eventmachine-1.2.5 in any of the sources
  Run `bundle install` to install missing gems.
  

• Initially, I tried numerous solutions proposed around the internet for about 3 hours, but none worked, but then I progressed as follows:

• Solution: Change Gemfile to the following, so eventmachine gem pointed to the project's vendor/bundle/gems directory. I also added gem rb-fsevent as recommended by http://railscasts.com/episodes/264-guard

  group :development, :test do
    gem 'eventmachine', '1.2.5',
      path: 'vendor/bundle/gems/eventmachine-1.2.5',
      require: 'eventmachine'
    gem 'rb-fsevent', :require => false if RUBY_PLATFORM =~ /darwin/i
    gem 'guard-rspec', '~> 4.7.3'
    gem 'guard-livereload', '~> 2.5.2'
  end
  

• Then I updated gems in Gemfile.lock

  bundle update
  

• But then I got a different error, which turned out to be associated with the PostgreSQL gem

• Error still when running rails s

   ~/guard_demo/vendor/bundle/gems/pg-0.21.0/lib/pg.rb:4:in `require': 
   dlopen(~/guard_demo/vendor/bundle/gems/pg-0.21.0/lib/pg_ext.bundle, 9): Symbol not found: 
   _rb_cFixnum (LoadError)
  

• Solution that worked was to switch from PostgreSQL version 0.21.0 to 0.20.0 by changing Gemfile to the following, including pointing to the project's vendor/bundle/gems directory

  gem 'pg', '0.20',
    path: 'vendor/bundle/gems/pg-0.20.0',
    require: 'pg'
  

• Then again I updated Gemfile.lock

  bundle update
  

• But then I got more errors associated with the http_parser.rb Gem

  $ bundle exec guard
  
  21:55:09 - ERROR - Invalid Guardfile, original error is: 
  > [#] 
  > [#] incompatible library version - ~/guard_demo/vendor/bundle/gems/http_parser.rb-0.6.0/lib/ruby_http_parser.bundle, 
  

$ rails s
Could not find http_parser.rb-0.5.3 in any of the sources
Run `bundle install` to install missing gems.

• I solved this by loading http_parser.rb's earlier version 0.5.3 in the Gemfile instead of 0.6.0

  group :development, :test do
    gem 'http_parser.rb', '0.5.3'
  end
  

  • Then I update Gemfile.lock again

  bundle update
  

• Then it all worked. I opened two Terminal Tabs and ran the following

  • In Tab 1 - rails s
  • In Tab 2 - bundle exec guard