[Android][Calabash] 在MacOS上安裝calabash

1. 下載 HomeBrew
$ /usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"

2. 安裝rbenv
$ brew install rbenv

3. 初始化rbenv
$ rbenv init

4. 設定ruby path，編輯bash_profile檔案並增加以下兩行指令

export PATH="$HOME/.rbenv/bin:$PATH"

eval "$(rbenv init -)"

重新開啟Terminal 或是source ~/.bash_profile使得設定生效

5. 跑rbenv-doctor確定安裝順利
$ curl -fsSL https://github.com/rbenv/rbenv-installer/raw/master/bin/rbenv-doctor | bash

成功的話會看到下列訊息：

Checking for `rbenv' in PATH: /usr/local/bin/rbenv
Checking for rbenv shims in PATH: OK
Checking `rbenv install' support: /usr/local/bin/rbenv-install (ruby-build 20170523)
Counting installed Ruby versions: none
  There aren't any Ruby versions installed under `~/.rbenv/versions'.
  You can install Ruby versions like so: rbenv install 2.2.4
Checking RubyGems settings: OK
Auditing installed plugins: OK

Remark: 第一次執行的時候看到

Checking for rbenv shims in PATH: none

重開terminal後，再rbenv init一次即可順利設定PATH

6. 安裝bundler
$ gem install bundler

Remark: 若是看到 You don't have write permissions for the /Library/Ruby/Gems/2.3.0 directory
不可用sudo gem install
這是PATH沒設定好，請回步驟四確認指令正確
或是按照下列指令重新安裝ruby

$  rbenv install 2.4.0
$  rbenv global 2.4.0
$  rbenv global
2.4.0
$  ruby -v
ruby 2.4.0p0 (2016-12-24 revision 57164) [x86_64-darwin16]

7. 安裝calabash-android
$ gem install calabash-android