rvm 使用记录

rvm是一个命令行工具，可以提供一个便捷的多版本ruby环境的管理和切换。

https://rvm.io/

 

安装 ruby-2.1.2

rvm install 2.1.2

 

列出各个版本信息。

rvm list known

 

使用一个ruby版本

rvm use 2.1.2

 

设置默认版本

rvm use 2.1.2 --default

 

查询已经安装的ruby

rvm list

 

卸载一个已安装版本

rvm remove 1.9.2

=====================================

gemset 的使用

 

rvm 可以管理不同的gemset.

gemset 是一个独立的虚拟gem环境，每一个gemset都是相互独立的。

 

建立gemset

rvm use 2.1.2

rvm gemset create rails_4_1_6

然后可以设定已建立的gemset做为当前环境

use 可以用来切换语言，或者gemset

 

rvm use 2.1.2

rvm use 2.1.2@rails_4_1_6

然后所有安装的gem都是安装在这个gemset之下。

 

列出当前ruby的gemset

rvm gemset list

 

清空gemset中的gem

rvm gemset empty 2.1.2@rails_4_1_6

 

删除一个gemset

rvm gemset delete 2.1.2@rails_4_1_6

 

项目自动加载 gemset，例如：

rvm install 2.1.2

rvm use 2.1.2

rvm gemset create rails_4_1_6

rvm use 2.1.2@rails_4_1_6

创建好之后，在项目目录下，建立一个.rvmrc文件。文件内容：

rvm use 2.1.2@rails_4_1_6

 

 

安装过程

Ruby enVironment Manager 1.29.11 (latest) (c) 2009-2020 Michal Papis, Piotr Kuczynski, Wayne E. Seguin

 

Warning, new version of rvm available '1.29.12', you are using older version '1.29.11'.

You can disable this warning with:   echo rvm_autoupdate_flag=0 >> ~/.rvmrc

You can enable auto-update with:     echo rvm_autoupdate_flag=2 >> ~/.rvmrc

You can update manually with:        rvm get VERSION                         (e.g. 'rvm get stable')

 

Searching for binary rubies, this might take some time.

Found remote file https://rvm_io.global.ssl.fastly.net/binaries/osx/10.15/x86_64/ruby-3.0.0.tar.bz2

Checking requirements for osx.

Installing requirements for osx.

Updating system......

Installing required packages: autoconf, automake, libtool, pkg-config, coreutils, libksba./

 

 

.........

Warning: You are using macOS 10.15.

We (and Apple) do not provide support for this old version.

It is expected behaviour that some formulae will fail to build in this old version.

It is expected behaviour that Homebrew will be buggy and slow.

Do not create any issues about this on Homebrew's GitHub repositories.

Do not create any issues even if you think this message is unrelated.

Any opened issues will be immediately closed without response.

Do not ask for help from MacHomebrew on Twitter.

You may ask for help in Homebrew's discussions but are unlikely to receive a response.

Try to figure out the problem yourself and submit a fix as a pull request.

We will review it but may or may not accept it.

 

==>Upgrading 3 outdated packages:

openssl@1.1 1.1.1q -> 1.1.1s

readline 8.1.2 -> 8.2.1

zlib 1.2.12 -> 1.2.13