安装homebrew
/usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
安装时如果报错：
Failed during: /usr/bin/sudo /usr/bin/xcode-select --switch /Library/Developer/CommandLineTools
需要先安装XCode CommandLineTools，在开发者下载页面搜索XCode找到command line tools并下载安装
安装ITerms2
用homebrew安装：
brew cask install iterm2
安装oh-my-zsh
# 1. 打开 iTerm2
# 2. 通过 git 下载：
git clone git://github.com/robbyrussell/oh-my-zsh.git ~/.oh-my-zsh
# 3. 复制创建~/.zshrc配置文件：
cp ~/.oh-my-zsh/templates/zshrc.zsh-template ~/.zshrc
# 4. bash 切换成 zsh ：
chsh -s /bin/zsh
# 5. 按照提醒输入密码，完全退出iTerm2
配置GitHUB环境
生成ssh公钥：
$ cd ~/.ssh
$ ssh-keygen -t rsa -C "your_email@example.com"
将生成之后的id_rsa.pub文件内容复制到github pub key中，然后本地测试：
ssh -T git@github.com
如果出现如下内容，说明pub key配置成功：
Warning: Permanently added the RSA host key for IP address '' to the list of known hosts.
Hi xxx! You've successfully authenticated, but GitHub does not provide shell access.
安装JDK
通过如下命令安装最新的JDK：
$ brew cask install java
安装成功提示：
installer: Package name is JDK 11
installer: Installing at base path /
installer: The install was successful.
🍺 java was successfully installed!
JDK11太新，线上用的是JDK8，所以我需要装JDK8:
$ brew tap caskroom/versions
$ brew cask install java8
配置Maven
export M2_HOME="~/Documents/program_tools/maven-3.5.4"
export M2=$M2_HOME/bin
export MAVEN_OPTS="-Xms256m -Xmx512m"
export PATH=$M2:$PATH