osx install gem

gem sources -r gem sources -a http://rubygems.org

碰到報錯：

Unable to pull data from 'https://rubygems.org/'

參考：http://stackoverflow.com/questions/19150017/ssl-error-when-installing-rubygems-unable-to-pull-data-from-https-rubygems-o/

這是gem 2.*版本的bug，能夠升級gem，解決方法：

sudo gem update --system

而後再：

sudo gem install rails

結果報錯：

andy@AndyMacBookPro:/usr/local/webdata/union$ gem install rails

ERROR:  While executing gem ... (Gem::RemoteFetcher::FetchError)

    Errno::ECONNRESET: Connection reset by peer - SSL_connect (

https://api.rubygems.org/quick/Marshal.4.8/rails-4.2.4.gemspec.rz)

由於GFW屏蔽了gem server，解決辦法，使用淘寶的gem server:

andy@AndyMacBookPro:/usr/local/webdata/union$ gem sources --remove https://rubygems.org

source https://rubygems.org not present in cache

andy@AndyMacBookPro:/usr/local/webdata/union$ gem sources -a https://ruby.taobao.org

https://ruby.taobao.org added to sources

andy@AndyMacBookPro:/usr/local/webdata/union$

以後再:

sudo gem install rails

以前的錯誤沒有了，報一個小錯誤：

unable to convert "\x89" from ASCII-8BIT

sudo gem install rdoc

sudo gem --all --overwrite

從新生成文檔