gitlab 安装报错：Could not find modernizr-2.6.2 in any of the sources
gitlab一款开源的代码版本控制软件，仿github。安装过程中遇到一个问题，纠结了一上午，最终终于搞定了，分享一下：在安装deployment时：
sudo -u git -H bundle install --deployment --without development test postgres
报错：
Could not find modernizr-2.6.2 in any of the sources
找不到modernizr-2.6.2的库，更改了几个source源之后，问题也没有解决。于是通过wget下载modernizr，再进行安装：
cd /home/git/gitlab
wget http://rubygems.org/downloads/modernizr-2.6.2.gem
gem install modernizr
然后将Gemfile和Gemfile.lock配置文件的modernizr版本更改成2.7.1:
vim Gemfile
gem "modernizr" "2.6.2" ===> gem "modernizr-rails", "2.7.1"
vim Gemfile.lock
modernizr(2.6.2) ===> modernizr-rails (2.7.1)
modernizr(2.6.2) ===> modernizr-rails (= 2.7.1)
再次执行：
sudo -u git -H bundle install --deployment --without development test postgres
安装成功！
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