ruby – 显示宝石依赖的命令？

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

你要求的第一个命令是“宝石依赖”.以下是命令描述.

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

你需要的第二个命令是“gem install”.依赖关系自动安装.请参阅命令参考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.