Can't load local gems with dashes

[alagos]

If I create a new project with require_reloader

rails new lala

and I'm creating a gem with a dash in its name, let's say:

bundle gem foo-bar

then load the gem changing the Gemfile like:

gem 'foo-bar', path: '../foo-bar'

it throws:

/home/alter/.rvm/gems/ruby-2.4.2@default/gems/activesupport-5.1.4/lib/active_support/dependencies.rb:292:in `require': cannot load such file -- foo-bar (LoadError)
        from /home/alter/.rvm/gems/ruby-2.4.2@default/gems/activesupport-5.1.4/lib/active_support/dependencies.rb:292:in `block in require'
        from /home/alter/.rvm/gems/ruby-2.4.2@default/gems/activesupport-5.1.4/lib/active_support/dependencies.rb:258:in `load_dependency'
        from /home/alter/.rvm/gems/ruby-2.4.2@default/gems/activesupport-5.1.4/lib/active_support/dependencies.rb:292:in `require'
        from /home/alter/.rvm/gems/ruby-2.4.2@default/gems/require_reloader-0.2.1/lib/require_reloader.rb:58:in `block (2 levels) in watch'
        from /home/alter/.rvm/gems/ruby-2.4.2@default/gems/activesupport-5.1.4/lib/active_support/callbacks.rb:413:in `instance_exec'
        from /home/alter/.rvm/gems/ruby-2.4.2@default/gems/activesupport-5.1.4/lib/active_support/callbacks.rb:413:in `block in make_lambda'
        from /home/alter/.rvm/gems/ruby-2.4.2@default/gems/activesupport-5.1.4/lib/active_support/callbacks.rb:197:in `block (2 levels) in halting'
        from /home/alter/.rvm/gems/ruby-2.4.2@default/gems/activesupport-5.1.4/lib/active_support/callbacks.rb:601:in `block (2 levels) in default_terminator'
        from /home/alter/.rvm/gems/ruby-2.4.2@default/gems/activesupport-5.1.4/lib/active_support/callbacks.rb:600:in `catch'
        from /home/alter/.rvm/gems/ruby-2.4.2@default/gems/activesupport-5.1.4/lib/active_support/callbacks.rb:600:in `block in default_terminator'
        from /home/alter/.rvm/gems/ruby-2.4.2@default/gems/activesupport-5.1.4/lib/active_support/callbacks.rb:198:in `block in halting'
        from /home/alter/.rvm/gems/ruby-2.4.2@default/gems/activesupport-5.1.4/lib/active_support/callbacks.rb:507:in `block in invoke_before'
        from /home/alter/.rvm/gems/ruby-2.4.2@default/gems/activesupport-5.1.4/lib/active_support/callbacks.rb:507:in `each'
        from /home/alter/.rvm/gems/ruby-2.4.2@default/gems/activesupport-5.1.4/lib/active_support/callbacks.rb:507:in `invoke_before'
        from /home/alter/.rvm/gems/ruby-2.4.2@default/gems/activesupport-5.1.4/lib/active_support/callbacks.rb:130:in `run_callbacks'
        from /home/alter/.rvm/gems/ruby-2.4.2@default/gems/activesupport-5.1.4/lib/active_support/reloader.rb:87:in `prepare!'
        from /home/alter/.rvm/gems/ruby-2.4.2@default/gems/railties-5.1.4/lib/rails/application/finisher.rb:61:in `block in <module:Finisher>'
        from /home/alter/.rvm/gems/ruby-2.4.2@default/gems/railties-5.1.4/lib/rails/initializable.rb:30:in `instance_exec'
        from /home/alter/.rvm/gems/ruby-2.4.2@default/gems/railties-5.1.4/lib/rails/initializable.rb:30:in `run'
        from /home/alter/.rvm/gems/ruby-2.4.2@default/gems/railties-5.1.4/lib/rails/initializable.rb:59:in `block in run_initializers'
        from /home/alter/.rvm/rubies/ruby-2.4.2/lib/ruby/2.4.0/tsort.rb:228:in `block in tsort_each'
        from /home/alter/.rvm/rubies/ruby-2.4.2/lib/ruby/2.4.0/tsort.rb:350:in `block (2 levels) in each_strongly_connected_component'
        from /home/alter/.rvm/rubies/ruby-2.4.2/lib/ruby/2.4.0/tsort.rb:431:in `each_strongly_connected_component_from'
        from /home/alter/.rvm/rubies/ruby-2.4.2/lib/ruby/2.4.0/tsort.rb:349:in `block in each_strongly_connected_component'
        from /home/alter/.rvm/rubies/ruby-2.4.2/lib/ruby/2.4.0/tsort.rb:347:in `each'
        from /home/alter/.rvm/rubies/ruby-2.4.2/lib/ruby/2.4.0/tsort.rb:347:in `call'
        from /home/alter/.rvm/rubies/ruby-2.4.2/lib/ruby/2.4.0/tsort.rb:347:in `each_strongly_connected_component'
        from /home/alter/.rvm/rubies/ruby-2.4.2/lib/ruby/2.4.0/tsort.rb:226:in `tsort_each'
        from /home/alter/.rvm/rubies/ruby-2.4.2/lib/ruby/2.4.0/tsort.rb:205:in `tsort_each'
        from /home/alter/.rvm/gems/ruby-2.4.2@default/gems/railties-5.1.4/lib/rails/initializable.rb:58:in `run_initializers'
        from /home/alter/.rvm/gems/ruby-2.4.2@default/gems/railties-5.1.4/lib/rails/application.rb:353:in `initialize!'
        from /home/alter/temp/lala/config/environment.rb:5:in `<top (required)>'
        from config.ru:3:in `require_relative'
        from config.ru:3:in `block in <main>'
        from /home/alter/.rvm/gems/ruby-2.4.2@default/gems/rack-2.0.4/lib/rack/builder.rb:55:in `instance_eval'
        from /home/alter/.rvm/gems/ruby-2.4.2@default/gems/rack-2.0.4/lib/rack/builder.rb:55:in `initialize'
        from config.ru:in `new'
        from config.ru:in `<main>'
        from /home/alter/.rvm/gems/ruby-2.4.2@default/gems/rack-2.0.4/lib/rack/builder.rb:49:in `eval'
        from /home/alter/.rvm/gems/ruby-2.4.2@default/gems/rack-2.0.4/lib/rack/builder.rb:49:in `new_from_string'
        from /home/alter/.rvm/gems/ruby-2.4.2@default/gems/rack-2.0.4/lib/rack/builder.rb:40:in `parse_file'
        from /home/alter/.rvm/gems/ruby-2.4.2@default/gems/rack-2.0.4/lib/rack/server.rb:319:in `build_app_and_options_from_config'
        from /home/alter/.rvm/gems/ruby-2.4.2@default/gems/rack-2.0.4/lib/rack/server.rb:219:in `app'
        from /home/alter/.rvm/gems/ruby-2.4.2@default/gems/railties-5.1.4/lib/rails/commands/server/server_command.rb:24:in `app'
        from /home/alter/.rvm/gems/ruby-2.4.2@default/gems/rack-2.0.4/lib/rack/server.rb:354:in `wrapped_app'
        from /home/alter/.rvm/gems/ruby-2.4.2@default/gems/railties-5.1.4/lib/rails/commands/server/server_command.rb:80:in `log_to_stdout'
        from /home/alter/.rvm/gems/ruby-2.4.2@default/gems/railties-5.1.4/lib/rails/commands/server/server_command.rb:42:in `start'
        from /home/alter/.rvm/gems/ruby-2.4.2@default/gems/railties-5.1.4/lib/rails/commands/server/server_command.rb:135:in `block in perform'
        from /home/alter/.rvm/gems/ruby-2.4.2@default/gems/railties-5.1.4/lib/rails/commands/server/server_command.rb:130:in `tap'
        from /home/alter/.rvm/gems/ruby-2.4.2@default/gems/railties-5.1.4/lib/rails/commands/server/server_command.rb:130:in `perform'
        from /home/alter/.rvm/gems/ruby-2.4.2@default/gems/thor-0.20.0/lib/thor/command.rb:27:in `run'
        from /home/alter/.rvm/gems/ruby-2.4.2@default/gems/thor-0.20.0/lib/thor/invocation.rb:126:in `invoke_command'
        from /home/alter/.rvm/gems/ruby-2.4.2@default/gems/thor-0.20.0/lib/thor.rb:387:in `dispatch'
        from /home/alter/.rvm/gems/ruby-2.4.2@default/gems/railties-5.1.4/lib/rails/command/base.rb:63:in `perform'
        from /home/alter/.rvm/gems/ruby-2.4.2@default/gems/railties-5.1.4/lib/rails/command.rb:44:in `invoke'
        from /home/alter/.rvm/gems/ruby-2.4.2@default/gems/railties-5.1.4/lib/rails/commands.rb:16:in `<top (required)>'
        from /home/alter/temp/lala/bin/rails:9:in `require'
        from /home/alter/temp/lala/bin/rails:9:in `<top (required)>'
        from /home/alter/.rvm/gems/ruby-2.4.2@default/gems/spring-2.0.2/lib/spring/client/rails.rb:28:in `load'
        from /home/alter/.rvm/gems/ruby-2.4.2@default/gems/spring-2.0.2/lib/spring/client/rails.rb:28:in `call'
        from /home/alter/.rvm/gems/ruby-2.4.2@default/gems/spring-2.0.2/lib/spring/client/command.rb:7:in `call'
        from /home/alter/.rvm/gems/ruby-2.4.2@default/gems/spring-2.0.2/lib/spring/client.rb:30:in `run'
        from /home/alter/.rvm/gems/ruby-2.4.2@default/gems/spring-2.0.2/bin/spring:49:in `<top (required)>'
        from /home/alter/.rvm/gems/ruby-2.4.2@default/gems/spring-2.0.2/lib/spring/binstub.rb:31:in `load'
        from /home/alter/.rvm/gems/ruby-2.4.2@default/gems/spring-2.0.2/lib/spring/binstub.rb:31:in `<top (required)>'
        from /home/alter/.rvm/rubies/ruby-2.4.2/lib/ruby/2.4.0/rubygems/core_ext/kernel_require.rb:68:in `require'
        from /home/alter/.rvm/rubies/ruby-2.4.2/lib/ruby/2.4.0/rubygems/core_ext/kernel_require.rb:68:in `require'
        from /home/alter/temp/lala/bin/spring:15:in `<top (required)>'
        from bin/rails:3:in `load'
        from bin/rails:3:in `<main>'

with an absolute path is the same story.

[AndrewRayCode]

Same issue, blocks all my gem loading as they're prefixed with a namespace

[maxivak]

If you are working with your gem locally and can modify it then you can change autoload_paths for your gem inside gem:

#/lib/mygem.rb
module OurGem
  if defined?(Rails)
    require 'mygem/engine'
  else
    require 'mygem/mystuff'
  end
end

#/lib/mygem/engine.rb
module Mygem
  class Engine < ::Rails::Engine
    config.autoload_paths += Dir["#{config.root}/lib/**/"]
  end
end

In my case my gem was a simple gem which can be used without Rails.
I tried to add gem's directories to autoload_paths and it didn't work.
Even I added my paths directly

mygem_base_path = '/local/path/to/gem/lib'
config.autoload_paths += Dir[mygem_base_path]
config.autoload_paths += Dir[File.join(mygem_base_path, "**/"]