osx install gem

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

碰到报错：

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

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

这是gem 2.*版本的bug，能够升级gem，解决方法：

sudo gem update --system

而后再：

sudo gem install rails

结果报错：

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)

由于GFW屏蔽了gem server，解决办法，使用淘宝的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$

以后再:

sudo gem install rails

以前的错误没有了，报一个小错误：

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

sudo gem install rdoc

sudo gem --all --overwrite

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