如何在Mac上安装ruby gems ?

How do I install RubyGems on my Mac?

如何在Mac上安装RubyGems ?

I tried to run $ gem install rubygems-update with no luck . It returns

我试着运行$ gem安装rubygems-update，没有运气。它返回

ERROR:  While executing gem ... (Gem::FilePermissionError)
    You don't have write permissions for the /Library/Ruby/Gems/2.0.0 directory.

Any help would be great. Thanks

任何帮助都是好的。谢谢

3 个解决方案

#1

I would highly suggest using a package manager and a Ruby Environment Manager.

我强烈建议使用包管理器和Ruby环境管理器。

On Mac:

在Mac:

brew update
brew install ruby

# If you use bash
echo 'export PATH=/usr/local/Cellar/ruby/2.4.1_1/bin:$PATH' >> ~/.bash_profile 

# If you use ZSH:
echo 'export PATH=/usr/local/Cellar/ruby/2.4.1_1/bin:$PATH' >> ~/.zprofile

You can do that but I suggest using an Environment Manager for Ruby. You have rbenv and RVM.
IMO go for rbenv:

您可以这样做，但是我建议使用Ruby的环境管理器。有rbenv和RVM。国际海事组织去rbenv:

brew install rbenv ruby-build

# bash
echo 'export PATH="$HOME/.rbenv/bin:$PATH"' >> ~/.bash_profile
echo 'eval "$(rbenv init -)"' >> ~/.bash_profile  

# zsh
echo 'export PATH="$HOME/.rbenv/bin:$PATH"' >> ~/.zprofile
echo 'eval "$(rbenv init -)"' >> ~/.zprofile  

# list all available versions:
rbenv install -l

# install a Ruby version:
rbenv install 2.4.1

# set ruby version for a specific dir
rbenv local 2.4.1

# set ruby version globally
rbenv global 2.4.1

rbenv rehash
gem update --system

#2

You may have to install manually in which case (as per the official website):

您可能需要手动安装在这种情况下(根据官方网站):

Go to the official website and download the zip file
到官方网站下载zip文件
Unzip the file in a directory.
解压目录中的文件。
Then go to the directory in your terminal and run: ruby setup.rb
然后转到终端中的目录并运行:ruby setup.rb

#3

It is showing that you don't have the permission to write something in that directory. Instead use this directory :

这表明您没有权限在该目录中写入内容。而是使用这个目录:

sudo gem install -n /usr/local/bin cocoapods

sudo gem安装-n /usr/local/bin cocoapods

It perfectly work for me.

这对我来说非常有效。

(I am using macOS Sierra, version 10.12.6)

(我使用的是macOS Sierra，版本10.12.6)

#1