ruby - 显示 gem 依赖项的命令？

Question

是否有一个命令可以告诉您一个 gem 所依赖的其他 gem？

另外，有没有办法自动安装 gem 的依赖项？

Answer 1

以下信息是从下面链接的 ruby​​gems 命令引用中提取的。

http://guides.rubygems.org/command-reference/#gem-dependency

您要求的第一个命令是“gem dependency”。下面是命令说明。

gem dependency GEMNAME [options]

Options:
-v, --version VERSION            Specify version of gem to uninstall
-r, --[no-]reverse-dependencies  Include reverse dependencies in the output
-p, --pipe                       Pipe Format (name --version ver)

Common Options:
    --source URL                 Use URL as the remote source for gems
-h, --help                       Get help on this command
    --config-file FILE           Use this config file instead of default
    --backtrace                  Show stack backtrace on errors
    --debug                      Turn on Ruby debugging

Arguments:
GEMNAME   name of gems to show

Summary:
Show the dependencies of an installed gem

Defaults:
--version '> 0' --no-reverse

您需要的第二个命令是“gem install”。依赖项会自动安装。阅读命令引用中的以下引述以获取更多详细信息。

"gem install" will install the named gem. It will attempt a local installation (i.e. a .gem file in the current directory), and if that fails, it will attempt to download and install the most recent version of the gem you want.

If a gem is being installed remotely, and it depends on other gems that are not installed, then gem will download and install those, after you have confirmed the operation.