准备

系统环境：win10
ruby：rubyinstaller-devkit-3.0.3-1-x64.exe
官网

安装

点击exe进行安装，安装完成后询问是否安装“development toolchain”，选择“是”。
如果没有选择，也可以打开命令行输入命令ridk install，在界面中选择安装。

至此，ruby和gem已经安装成功

ruby -v
gem -v

如果官方gem员无法使用，可以替换为国内源，位置是：msys64\etc\pacman.d目录
mirrorlist.msys

##
## MSYS2 repository mirrorlist
##

## Primary
## msys2.org
Server = http://mirrors.ustc.edu.cn/msys2/msys/$arch/
Server = http://repo.msys2.org/msys/$arch
Server = http://downloads.sourceforge.net/project/msys2/REPOS/MSYS2/$arch
Server = http://www2.futureware.at/~nickoe/msys2-mirror/msys/$arch/

mirrorlist.mingw64

##
## 64-bit Mingw-w64 repository mirrorlist
##

## Primary
## msys2.org
Server = http://mirrors.ustc.edu.cn/msys2/mingw/x86_64/
Server = http://repo.msys2.org/mingw/x86_64
Server = http://downloads.sourceforge.net/project/msys2/REPOS/MINGW/x86_64
Server = http://www2.futureware.at/~nickoe/msys2-mirror/x86_64/
Server = http://mirror.bit.edu.cn/msys2/REPOS/

mirrorlist.mingw32

##
## 32-bit Mingw-w64 repository mirrorlist
##

## Primary
## msys2.org
Server = http://mirrors.ustc.edu.cn/msys2/mingw/i686/
Server = http://repo.msys2.org/mingw/i686
Server = http://downloads.sourceforge.net/project/msys2/REPOS/MINGW/i686
Server = http://www2.futureware.at/~nickoe/msys2-mirror/i686/

安装rails