为什么 Rails 命令强制为 `new` 命令显示帮助信息？

Question

奇怪的是，在某些情况下我无法执行典型的 Rails 命令，例如 rails s 和 rails c。

我发现这发生在某个功能分支上，过去也偶尔发生过，但目前在我的 develop 分支上。

我撤消了所有可以加载并产生任何影响的 .rb 文件，但这没有帮助，其他更改是 .sh 文件和自述文件更新。

我不想看到的文字：

> rails
Usage:
  rails new APP_PATH [options]

Options:
  -r, [--ruby=PATH]                                      # Path to the Ruby binary of your choice
                                                         # Default: /Users/jsmall/.rvm/rubies/ruby-2.1.5/bin/ruby
  -b, [--builder=BUILDER]                                # Path to a application builder (can be a filesystem path or URL)
  -m, [--template=TEMPLATE]                              # Path to an application template (can be a filesystem path or URL)
      [--skip-gemfile], [--no-skip-gemfile]              # Don't create a Gemfile
      [--skip-bundle], [--no-skip-bundle]                # Don't run bundle install
  -G, [--skip-git], [--no-skip-git]                      # Skip Git ignores and keeps
  -O, [--skip-active-record], [--no-skip-active-record]  # Skip Active Record files
  -S, [--skip-sprockets], [--no-skip-sprockets]          # Skip Sprockets files
  -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
  -T, [--skip-test-unit], [--no-skip-test-unit]          # Skip Test::Unit files
      [--old-style-hash], [--no-old-style-hash]          # Force using old style hash (:foo => 'bar') on Ruby >= 1.9

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.

我想看的文字：

> rails
Usage: rails COMMAND [ARGS]

The most common rails commands are:
 generate    Generate new code (short-cut alias: "g")
 console     Start the Rails console (short-cut alias: "c")
 server      Start the Rails server (short-cut alias: "s")
 dbconsole   Start a console for the database specified in config/database.yml
             (short-cut alias: "db")
 new         Create a new Rails application. "rails new my_app" creates a
             new application called MyApp in "./my_app"

In addition to those, there are:
 application  Generate the Rails application code
 destroy      Undo code generated with "generate" (short-cut alias: "d")
 benchmarker  See how fast a piece of code runs
 profiler     Get profile information from a piece of code
 plugin       Install a plugin
 runner       Run a piece of code in the application environment (short-cut alias: "r")

All commands can be run with -h (or --help) for more information.

Answer 1

通过随机阅读这个答案 (Whosebug - Why does my rails command always create a new application?)，它让我产生了检查项目中我的 script 文件夹的想法。我早些时候移动了它，这就是 Rails 一直试图让我通过那个特定的帮助屏幕创建一个新项目的原因。

将 rails 命令移回 script 文件夹有助于 rails 检测到我的项目，脚本允许我再次使用其他命令。

我将在这里问一个新问题，关于我为什么这样做，以及如何解决它。

Answer 2

我发现我的应用程序的根目录中没有 bin 文件夹。快速修复：

bundle exec rake rails:update:bin

对 Pradeep 的支持：
Rails server does not start by command "Rails s"

Answer 3

这为我修复了它：

bundle exec rake app:update:bin

为什么 Rails 命令强制为 `new` 命令显示帮助信息？

Why does the Rails command force a help message for the `new` command?

ruby-on-rails

ruby-on-rails-3