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ruby on rails5 はまったこと

現象

# bundle exec rails c
Could not find rake-12.3.0 in any of the sources
Run `bundle install` to install missing gems.

解決

# bundle install --binstubs
または
# rails app:update:bin

# bundle exec rails g

ログ

Looks like your app's ./bin/rails is a stub that was generated by Bundler.

In Rails 5, your app's bin/ directory contains executables that are versioned
like any other source code, rather than stubs that are generated on demand.

Here's how to upgrade:

  bundle config --delete bin    # Turn off Bundler's stub generator
  rails app:update:bin          # Use the new Rails 5 executables
  git add bin                   # Add bin/ to source control

You may need to remove bin/ from your .gitignore as well.

When you install a gem whose executable you want to use in your app,
generate it and add it to source control:

  bundle binstubs some-gem-name
  git add bin/new-executable

      remove  /controllers/test_controller.rb
      invoke  erb
      remove    /views/test
      invoke  test_unit
      remove    test/controllers/test_controller_test.rb
      invoke  helper
      remove    /helpers/test_helper.rb
      invoke    test_unit
      invoke  assets
      invoke    coffee
      invoke    scss
Usage:
  rails new APP_PATH [options]

Options:
  -r, [--ruby=PATH]                                      # Path to the Ruby binary of your choice
                                                         # Default: /usr/local/bin/ruby
  -m, [--template=TEMPLATE]                              # Path to some application template (can be a filesystem path or URL)
  -d, [--database=DATABASE]                              # Preconfigure for selected database (options: mysql/postgresql/sqlite3/oracle/frontbase/ibm_db/sqlserver/jdbcmysql/jdbcsqlite3/jdbcpostgresql/jdbc)
                                                         # Default: sqlite3
      [--skip-yarn], [--no-skip-yarn]                    # Don't use Yarn for managing JavaScript dependencies
      [--skip-gemfile], [--no-skip-gemfile]              # Don't create a Gemfile
  -G, [--skip-git], [--no-skip-git]                      # Skip .gitignore file
      [--skip-keeps], [--no-skip-keeps]                  # Skip source control .keep files
  -M, [--skip-action-mailer], [--no-skip-action-mailer]  # Skip Action Mailer files
  -O, [--skip-active-record], [--no-skip-active-record]  # Skip Active Record files
  -P, [--skip-puma], [--no-skip-puma]                    # Skip Puma related files
  -C, [--skip-action-cable], [--no-skip-action-cable]    # Skip Action Cable files
  -S, [--skip-sprockets], [--no-skip-sprockets]          # Skip Sprockets files
      [--skip-spring], [--no-skip-spring]                # Don't install Spring application preloader
      [--skip-listen], [--no-skip-listen]                # Don't generate configuration that depends on the listen gem
      [--skip-coffee], [--no-skip-coffee]                # Don't use CoffeeScript
  -J, [--skip-javascript], [--no-skip-javascript]        # Skip JavaScript files
      [--skip-turbolinks], [--no-skip-turbolinks]        # Skip turbolinks gem
  -T, [--skip-test], [--no-skip-test]                    # Skip test files
      [--skip-system-test], [--no-skip-system-test]      # Skip system test 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
      [--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
      [--api], [--no-api]                                # Preconfigure smaller stack for API only apps
  -B, [--skip-bundle], [--no-skip-bundle]                # Don't run bundle install
      [--webpack=WEBPACK]                                # Preconfigure for app-like JavaScript with Webpack (options: react/vue/angular)

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.

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