RVM baby 版本管理器

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RVM baby 版本管理器

安装 RVM baby 版本管理器

$curl -L get.rvm.io | bash -s stable
打印代码：

In case of problems: https://rvm.io/help and https://twitter.com/rvm_io

说明安装成功

查看当前信息

$ source ~/.bashrc

$source ~/.bash_profile

$rvm -v
打印代码：

rvm 1.27.0 (latest) by Wayne E. Seguin <wayneeseguin@gmail.com>, Michal Papis <mpapis@gmail.com> [https://rvm.io/]

用RVM升级Ruby查看当前ruby版本

$ruby -v

$rvm list known
打印代码

# MRI Rubies[ruby-]1.8.6[-p420][ruby-]1.8.7[-head] # security released on head[ruby-]1.9.1[-p431][ruby-]1.9.2[-p330][ruby-]1.9.3[-p551][ruby-]2.0.0[-p648][ruby-]2.1[.8][ruby-]2.2[.4][ruby-]2.3[.0][ruby-]2.2-headruby-head# for forks use: rvm install ruby-head-<name> --url https://github.com/github/ruby.git --branch 2.2# JRubyjruby-1.6[.8]jruby-1.7[.23]jruby[-9.0.5.0]jruby-head# Rubiniusrbx-1[.4.3]rbx-2.3[.0]rbx-2.4[.1]rbx[-2.5.8]rbx-head

安装ruby 2.2.2 版本

$rvm install 2.2.2
如果打印：

…  ruby-2.2.2 - #validate archive    ruby-2.2.2 - #extract    ruby-2.2.2 - #validate binary    ruby-2.2.2 - #setup    ruby-2.2.2 - #gemset created /Users/abc/.rvm/gems/ruby-2.2.2@global    ruby-2.2.2 - #importing gemset                /Users/abc/.rvm/gemsets/global.gems..............................    ruby-2.2.2 - #generating global wrappers........    ruby-2.2.2 - #gemset created /Users/abc/.rvm/gems/ruby-2.2.2    ruby-2.2.2 - #importing gemsetfile /Users/abc/.rvm/gemsets/default.gems                           　　evaluated to empty gem list     ruby-2.2.2 - #generating default wrappers........    Updating certificates in '/etc/openssl/cert.pem'.    mkdir: /etc/openssl: Permission denied    mkdir -p "/etc/openssl" failed, retrying with sudo    LiuWenqiang password required for 'mkdir -p /etc/openssl':     and sudo mkdir worked

则说明安装成功了
打印代码：

Done with Command Line Tools (OS X 10.11) for XcodeDone.==> /usr/bin/sudo /bin/rm -f /tmp/.com.apple.dt.CommandLineTools.installondemand.in-progress==> Installing the Command Line Tools (expect a GUI popup):==> /usr/bin/sudo /usr/bin/xcode-select --installxcode-select: error: command line tools are already installed, use "Software Update" to install updatesFailed during: /usr/bin/sudo /usr/bin/xcode-select --installRequirements installation failed with status: 1.

则失败。
如果安装失败，解决方案：
$ sudo xcode-select –switch /Library/Developer/CommandLineTools/

Password: （输入电脑权限密码）

$ git

usage: git [--version] [--help] [-C <path>] [-c name=value][--exec-path[=<path>]] [--html-path] [--man-path] [--info-path][-p | --paginate | --no-pager] [--no-replace-objects] [--bare][--git-dir=<path>] [--work-tree=<path>] [--namespace=<name>]<command> [<args>]

第二个问题就解决了
然后再重新执行：安装2.2.2版本步骤就可以解决

查看当前ruby 版本

$ruby -v

    ruby 2.2.2p95 (2015-04-13 revision 50295) [x86_64-darwin14]

现在ruby版本已经是2.2.2了

继续安装 CocoaPods

$sudo gem install cocoa pods

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

$pod setup

更新 gem

$ sudo gem update –system

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