Rbenv: Não foi possível encontrar o 'agregador'

Olá, desculpe por ter tido problemas. Eu acho que seu principal problema é que você tentou instalar algumas versões do Ruby usando sudo , e agora você não tem permissão para instalar gems nessas versões como um usuário comum.

Para corrigir, você não precisa definir explicitamente GEM_HOME para nada. Por favor, desmarque isso se você configurou GEM_HOME em qualquer lugar.

Em vez disso, você deve apenas alterar as permissões para seu próprio usuário:

sudo chown -R "${USER}:staff" ~/.rbenv

e então:

gem uninstall bundler
gem install bundler

Muito obrigado. Por favor, dê uma olhada nisso. Você poderia me dizer por que não consegui iniciar o servidor Rails ???

Last login: Wed Nov  4 02:35:52 on ttys000
alvin:~ Aals$ sudo chown -R "${USER}:staff" ~/.rbenv
Password:
alvin:~ Aals$ gem uninstall bundler
alvin:~ Aals$ gem install bundler
Successfully installed bundler-1.10.6
Parsing documentation for bundler-1.10.6
Done installing documentation for bundler after 6 seconds
1 gem installed
alvin:~ Aals$ cd /Users/Aals/Desktop/Dummy/
alvin:Dummy Aals$ rails new dummy_CMS -d mysql
      create  
      create  README.rdoc
      create  Rakefile
      create  config.ru
      create  .gitignore
      create  Gemfile
      create  app
      create  app/assets/javascripts/application.js
      create  app/assets/stylesheets/application.css
      create  app/controllers/application_controller.rb
      create  app/helpers/application_helper.rb
      create  app/views/layouts/application.html.erb
      create  app/assets/images/.keep
      create  app/mailers/.keep
      create  app/models/.keep
      create  app/controllers/concerns/.keep
      create  app/models/concerns/.keep
      create  bin
      create  bin/bundle
      create  bin/rails
      create  bin/rake
      create  bin/setup
      create  config
      create  config/routes.rb
      create  config/application.rb
      create  config/environment.rb
      create  config/secrets.yml
      create  config/environments
      create  config/environments/development.rb
      create  config/environments/production.rb
      create  config/environments/test.rb
      create  config/initializers
      create  config/initializers/assets.rb
      create  config/initializers/backtrace_silencers.rb
      create  config/initializers/cookies_serializer.rb
      create  config/initializers/filter_parameter_logging.rb
      create  config/initializers/inflections.rb
      create  config/initializers/mime_types.rb
      create  config/initializers/session_store.rb
      create  config/initializers/wrap_parameters.rb
      create  config/locales
      create  config/locales/en.yml
      create  config/boot.rb
      create  config/database.yml
      create  db
      create  db/seeds.rb
      create  lib
      create  lib/tasks
      create  lib/tasks/.keep
      create  lib/assets
      create  lib/assets/.keep
      create  log
      create  log/.keep
      create  public
      create  public/404.html
      create  public/422.html
      create  public/500.html
      create  public/favicon.ico
      create  public/robots.txt
      create  test/fixtures
      create  test/fixtures/.keep
      create  test/controllers
      create  test/controllers/.keep
      create  test/mailers
      create  test/mailers/.keep
      create  test/models
      create  test/models/.keep
      create  test/helpers
      create  test/helpers/.keep
      create  test/integration
      create  test/integration/.keep
      create  test/test_helper.rb
      create  tmp/cache
      create  tmp/cache/assets
      create  vendor/assets/javascripts
      create  vendor/assets/javascripts/.keep
      create  vendor/assets/stylesheets
      create  vendor/assets/stylesheets/.keep
         run  bundle install
bundle install
Fetching gem metadata from https://rubygems.org/............
Fetching version metadata from https://rubygems.org/...
Fetching dependency metadata from https://rubygems.org/..
Resolving dependencies.......................
Using rake 10.4.2
Using i18n 0.7.0
Installing json 1.8.3 with native extensions
Installing minitest 5.8.2
Using thread_safe 0.3.5
Using tzinfo 1.2.2
Using activesupport 4.2.4
Using builder 3.2.2
Using erubis 2.7.0
Using mini_portile 0.6.2
Using nokogiri 1.6.6.2
Using rails-deprecated_sanitizer 1.0.3
Using rails-dom-testing 1.0.7
Using loofah 2.0.3
Using rails-html-sanitizer 1.0.2
Using actionview 4.2.4
Using rack 1.6.4
Using rack-test 0.6.3
Using actionpack 4.2.4
Using globalid 0.3.6
Using activejob 4.2.4
Using mime-types 2.6.2
Using mail 2.6.3
Using actionmailer 4.2.4
Using activemodel 4.2.4
Using arel 6.0.3
Using activerecord 4.2.4
Installing debug_inspector 0.0.2 with native extensions
Installing binding_of_caller 0.7.2 with native extensions
Using bundler 1.10.6
Installing byebug 6.0.2 with native extensions
Installing coffee-script-source 1.9.1.1
Installing execjs 2.6.0
Installing coffee-script 2.4.1
Using thor 0.19.1
Using railties 4.2.4
Installing coffee-rails 4.1.0
Installing multi_json 1.11.2
Installing jbuilder 2.3.2
Installing jquery-rails 4.0.5
Installing mysql2 0.4.1 with native extensions
Using sprockets 3.4.0
Using sprockets-rails 2.3.3
Using rails 4.2.4
Using rdoc 4.2.0
Installing sass 3.4.19
Installing tilt 2.0.1
Installing sass-rails 5.0.4
Installing sdoc 0.4.1
Installing spring 1.4.0
Installing turbolinks 2.5.3
Installing uglifier 2.7.2
Installing web-console 2.2.1
Bundle complete! 12 Gemfile dependencies, 53 gems now installed.
Use `bundle show [gemname]` to see where a bundled gem is installed.
         run  bundle exec spring binstub --all
* bin/rake: spring inserted
* bin/rails: spring inserted

E também não consegui iniciar o servidor Rails, veja isso.

alvin:Dummy Aals$ rails s
Usage:
  rails new APP_PATH [options]

Options:
  -r, [--ruby=PATH]                                      # Path to the Ruby binary of your choice
                                                         # Default: /Users/Aals/.rbenv/versions/2.2.3/bin/ruby
  -m, [--template=TEMPLATE]                              # Path to some application template (can be a filesystem path or URL)
      [--skip-gemfile], [--no-skip-gemfile]              # Don't create a Gemfile
  -B, [--skip-bundle], [--no-skip-bundle]                # Don't run bundle install
  -G, [--skip-git], [--no-skip-git]                      # Skip .gitignore file
      [--skip-keeps], [--no-skip-keeps]                  # Skip source control .keep files
  -O, [--skip-active-record], [--no-skip-active-record]  # Skip Active Record files
  -S, [--skip-sprockets], [--no-skip-sprockets]          # Skip Sprockets files
      [--skip-spring], [--no-skip-spring]                # Don't install Spring application preloader
  -d, [--database=DATABASE]                              # Preconfigure for selected database (options: mysql/oracle/postgresql/sqlite3/frontbase/ibm_db/sqlserver/jdbcmysql/jdbcsqlite3/jdbcpostgresql/jdbc)
                                                         # Default: sqlite3
  -j, [--javascript=JAVASCRIPT]                          # Preconfigure for selected JavaScript library
                                                         # Default: jquery
  -J, [--skip-javascript], [--no-skip-javascript]        # Skip JavaScript files
      [--dev], [--no-dev]                                # Setup the application with Gemfile pointing to your Rails checkout
      [--edge], [--no-edge]                              # Setup the application with Gemfile pointing to Rails repository
      [--skip-turbolinks], [--no-skip-turbolinks]        # Skip turbolinks gem
  -T, [--skip-test-unit], [--no-skip-test-unit]          # Skip Test::Unit files
      [--rc=RC]                                          # Path to file containing extra configuration options for rails command
      [--no-rc], [--no-no-rc]                            # Skip loading of extra configuration options from .railsrc file

Runtime options:
  -f, [--force]                    # Overwrite files that already exist
  -p, [--pretend], [--no-pretend]  # Run but do not make any changes
  -q, [--quiet], [--no-quiet]      # Suppress status output
  -s, [--skip], [--no-skip]        # Skip files that already exist

Rails options:
  -h, [--help], [--no-help]        # Show this help message and quit
  -v, [--version], [--no-version]  # Show Rails version number and quit

Description:
    The 'rails new' command creates a new Rails application with a default
    directory structure and configuration at the path you specify.

    You can specify extra command-line arguments to be used every time
    'rails new' runs in the .railsrc configuration file in your home directory.

    Note that the arguments specified in the .railsrc file don't affect the
    defaults values shown above in this help message.

Example:
    rails new ~/Code/Ruby/weblog

    This generates a skeletal Rails installation in ~/Code/Ruby/weblog.
    See the README in the newly created application to get going.

Depois disso, quando o pacote instalar, isso acontece

alvin:Dummy Aals$ bundle install
Could not locate Gemfile or .bundle/ directory
alvin:Dummy Aals$ 

Eu resolvi isso fazendo isso -->> Se você puder me explicar, por que isso aconteceu, seria muito bom.

alvin:Dummy Aals$ rails new .
       exist  
      create  README.rdoc
      create  Rakefile
      create  config.ru
      create  .gitignore
      create  Gemfile
      create  app
      create  app/assets/javascripts/application.js
      create  app/assets/stylesheets/application.css
      create  app/controllers/application_controller.rb
      create  app/helpers/application_helper.rb
      create  app/views/layouts/application.html.erb
      create  app/assets/images/.keep
      create  app/mailers/.keep
      create  app/models/.keep
      create  app/controllers/concerns/.keep
      create  app/models/concerns/.keep
      create  bin
      create  bin/bundle
      create  bin/rails
      create  bin/rake
      create  bin/setup
      create  config
      create  config/routes.rb
      create  config/application.rb
      create  config/environment.rb
      create  config/secrets.yml
      create  config/environments
      create  config/environments/development.rb
      create  config/environments/production.rb
      create  config/environments/test.rb
      create  config/initializers
      create  config/initializers/assets.rb
      create  config/initializers/backtrace_silencers.rb
      create  config/initializers/cookies_serializer.rb
      create  config/initializers/filter_parameter_logging.rb
      create  config/initializers/inflections.rb
      create  config/initializers/mime_types.rb
      create  config/initializers/session_store.rb
      create  config/initializers/wrap_parameters.rb
      create  config/locales
      create  config/locales/en.yml
      create  config/boot.rb
      create  config/database.yml
      create  db
      create  db/seeds.rb
      create  lib
      create  lib/tasks
      create  lib/tasks/.keep
      create  lib/assets
      create  lib/assets/.keep
      create  log
      create  log/.keep
      create  public
      create  public/404.html
      create  public/422.html
      create  public/500.html
      create  public/favicon.ico
      create  public/robots.txt
      create  test/fixtures
      create  test/fixtures/.keep
      create  test/controllers
      create  test/controllers/.keep
      create  test/mailers
      create  test/mailers/.keep
      create  test/models
      create  test/models/.keep
      create  test/helpers
      create  test/helpers/.keep
      create  test/integration
      create  test/integration/.keep
      create  test/test_helper.rb
      create  tmp/cache
      create  tmp/cache/assets
      create  vendor/assets/javascripts
      create  vendor/assets/javascripts/.keep
      create  vendor/assets/stylesheets
      create  vendor/assets/stylesheets/.keep
         run  bundle install

bundle install
Fetching gem metadata from https://rubygems.org/............
Fetching version metadata from https://rubygems.org/...
Fetching dependency metadata from https://rubygems.org/..
Resolving dependencies................
Using rake 10.4.2
Using i18n 0.7.0
Using json 1.8.3
Using minitest 5.8.2
Using thread_safe 0.3.5
Using tzinfo 1.2.2
Using activesupport 4.2.4
Using builder 3.2.2
Using erubis 2.7.0
Using mini_portile 0.6.2
Using nokogiri 1.6.6.2
Using rails-deprecated_sanitizer 1.0.3
Using rails-dom-testing 1.0.7
Using loofah 2.0.3
Using rails-html-sanitizer 1.0.2
Using actionview 4.2.4
Using rack 1.6.4
Using rack-test 0.6.3
Using actionpack 4.2.4
Using globalid 0.3.6
Using activejob 4.2.4
Using mime-types 2.6.2
Using mail 2.6.3
Using actionmailer 4.2.4
Using activemodel 4.2.4
Using arel 6.0.3
Using activerecord 4.2.4
Using debug_inspector 0.0.2
Using binding_of_caller 0.7.2
Using bundler 1.10.6
Using byebug 6.0.2
Using coffee-script-source 1.9.1.1
Using execjs 2.6.0
Using coffee-script 2.4.1
Using thor 0.19.1
Using railties 4.2.4
Using coffee-rails 4.1.0
Using multi_json 1.11.2
Using jbuilder 2.3.2
Using jquery-rails 4.0.5
Using sprockets 3.4.0
Using sprockets-rails 2.3.3
Using rails 4.2.4
Using rdoc 4.2.0
Using sass 3.4.19
Using tilt 2.0.1
Using sass-rails 5.0.4
Using sdoc 0.4.1
Using spring 1.4.0
Installing sqlite3 1.3.11 with native extensions
Using turbolinks 2.5.3
Using uglifier 2.7.2
Using web-console 2.2.1
Bundle complete! 12 Gemfile dependencies, 53 gems now installed.
Use `bundle show [gemname]` to see where a bundled gem is installed.
         run  bundle exec spring binstub --all
* bin/rake: spring inserted
* bin/rails: spring inserted
alvin:Dummy Aals$ 
alvin:Dummy Aals$ bundle install
Using rake 10.4.2
Using i18n 0.7.0
Using json 1.8.3
Using minitest 5.8.2
Using thread_safe 0.3.5
Using tzinfo 1.2.2
Using activesupport 4.2.4
Using builder 3.2.2
Using erubis 2.7.0
Using mini_portile 0.6.2
Using nokogiri 1.6.6.2
Using rails-deprecated_sanitizer 1.0.3
Using rails-dom-testing 1.0.7
Using loofah 2.0.3
Using rails-html-sanitizer 1.0.2
Using actionview 4.2.4
Using rack 1.6.4
Using rack-test 0.6.3
Using actionpack 4.2.4
Using globalid 0.3.6
Using activejob 4.2.4
Using mime-types 2.6.2
Using mail 2.6.3
Using actionmailer 4.2.4
Using activemodel 4.2.4
Using arel 6.0.3
Using activerecord 4.2.4
Using debug_inspector 0.0.2
Using binding_of_caller 0.7.2
Using byebug 6.0.2
Using coffee-script-source 1.9.1.1
Using execjs 2.6.0
Using coffee-script 2.4.1
Using thor 0.19.1
Using railties 4.2.4
Using coffee-rails 4.1.0
Using multi_json 1.11.2
Using jbuilder 2.3.2
Using jquery-rails 4.0.5
Using bundler 1.10.6
Using sprockets 3.4.0
Using sprockets-rails 2.3.3
Using rails 4.2.4
Using rdoc 4.2.0
Using sass 3.4.19
Using tilt 2.0.1
Using sass-rails 5.0.4
Using sdoc 0.4.1
Using spring 1.4.0
Using sqlite3 1.3.11
Using turbolinks 2.5.3
Using uglifier 2.7.2
Using web-console 2.2.1
Bundle complete! 12 Gemfile dependencies, 53 gems now installed.
Use `bundle show [gemname]` to see where a bundled gem is installed.
alvin:Dummy Aals$ rails s
=> Booting WEBrick
=> Rails 4.2.4 application starting in development on http://localhost:3000
=> Run `rails server -h` for more startup options
=> Ctrl-C to shutdown server
[2015-11-04 19:39:19] INFO  WEBrick 1.3.1
[2015-11-04 19:39:19] INFO  ruby 2.2.3 (2015-08-18) [x86_64-darwin15]
[2015-11-04 19:39:19] INFO  WEBrick::HTTPServer#start: pid=95118 port=3000


Started GET "/" for ::1 at 2015-11-04 19:39:30 +0530
Processing by Rails::WelcomeController#index as HTML
  Rendered /Users/Aals/.rbenv/versions/2.2.3/lib/ruby/gems/2.2.0/gems/railties-4.2.4/lib/rails/templates/rails/welcome/index.html.erb (3.1ms)
Completed 200 OK in 84ms (Views: 51.1ms | ActiveRecord: 0.0ms)

Quando você fez rails new dummy_CMS -d mysql pela primeira vez, você esqueceu de cd no novo diretório dummy_CMS onde o aplicativo foi gerado. É por isso que rails s e bundle install não funcionaram — você não estava no diretório do projeto.

Além disso, quando estiver no diretório do projeto, é inteligente invocar bin/rails em vez de apenas rails . Isso ocorre porque bin/rails é adaptado para o aplicativo atual.