用rvm安装rails 3.0

系统:ubuntu
当前RoR版本

zhanghong@zh-desktop:~$ ruby -v
ruby 1.8.7 (2010-01-10 patchlevel 249) [i486-linux]

zhanghong@zh-desktop:~$ rails -v
Rails 2.3.5

1安装rvm

mkdir -p ~/.rvm/src/ && cd ~/.rvm/src && rm -rf ./rvm/ && git clone --depth 1 git://github.com/wayneeseguin/rvm.git && cd rvm && ./install

修改.bashrc，在文件末行添加
[[ -s $HOME/.rvm/scripts/rvm ]] && source $HOME/.rvm/scripts/rvm

查看rvm版本，新打开一个终端

zhanghong@zh-desktop:~$ rvm -v

rvm 0.1.38 by Wayne E. Seguin ([e-mail]) [http://rvm.beginrescueend.com/]

更新rvm

rvm update --head

install curl

sudo apt-get install curl libcurl3 libcurl3-dev

install ruby 1.9.1

zhanghong@zh-desktop:~$ rvm install 1.9.1
................
zhanghong@zh-desktop:~$ rvm list

rvm rubies

   ruby-1.9.1-p378 [ i386 ]

查看ruby版本

zhanghong@zh-desktop:~$ ruby -v
ruby 1.8.7 (2010-01-10 patchlevel 249) [i486-linux]
zhanghong@zh-desktop:~$ rvm 1.9.1
zhanghong@zh-desktop:~$ ruby -v
ruby 1.9.1p378 (2010-01-10 revision 26273) [i686-linux]

安装gem
gem会安装到/home/zhanghong/.rvm/gems/ruby-1.9.1-p378，查看gem安装地址方法

rvm gemdir

gem install tzinfo builder memcache-client rack rack-test rack-mount erubis mail text-format thor bundler i18n
gem install rails --pre

zhanghong@zh-desktop:~$ rails -v
Rails 3.0.0.beta4
#创建项目
zhanghong@zh-desktop:~/workspace$ rails new  topscore -d mysql

启动项目

zhanghong@zh-desktop:~/workspace/topscore$ rails start
Could not find gem 'mysql (>= 0, runtime)' in the gems available on this machine.
Try running `bundle install`.
zhanghong@zh-desktop:~/workspace/topscore$ bundle install mysql
Fetching source index from http://rubygems.org/
Using rake (0.8.7) from system gems 
Using abstract (1.0.0) from system gems 
Using activesupport (3.0.0.beta4) from system gems 
Using builder (2.1.2) from system gems 
Using i18n (0.4.1) from system gems 
Using activemodel (3.0.0.beta4) from system gems 
Using erubis (2.6.5) from system gems 
Using rack (1.1.0) from system gems 
Using rack-mount (0.6.3) from system gems 
Using rack-test (0.5.4) from system gems 
Using tzinfo (0.3.22) from system gems 
Using actionpack (3.0.0.beta4) from system gems 
Using mime-types (1.16) from system gems 
Using polyglot (0.3.1) from system gems 
Using treetop (1.4.8) from system gems 
Using mail (2.2.3) from system gems 
Using actionmailer (3.0.0.beta4) from system gems 
Using arel (0.4.0) from system gems 
Using activerecord (3.0.0.beta4) from system gems 
Using activeresource (3.0.0.beta4) from system gems 
Using bundler (0.9.26) from system gems 
Installing mysql (2.8.1) from rubygems repository at http://rubygems.org/ with native extensions 
Using thor (0.13.6) from system gems 
Using railties (3.0.0.beta4) from system gems 
Using rails (3.0.0.beta4) from system gems 
Your bundle is complete! Use `bundle show [gemname]` to see where a bundled gem is installed.

zhanghong@zh-desktop:~/workspace/topscore$ bundle show
Gems included by the bundle:
  * abstract (1.0.0)
  * actionmailer (3.0.0.beta4)
  * actionpack (3.0.0.beta4)
  * activemodel (3.0.0.beta4)
  * activerecord (3.0.0.beta4)
  * activeresource (3.0.0.beta4)
  * activesupport (3.0.0.beta4)
  * arel (0.4.0)
  * builder (2.1.2)
  * bundler (0.9.26)
  * erubis (2.6.5)
  * i18n (0.4.1)
  * mail (2.2.3)
  * mime-types (1.16)
  * mysql (2.8.1)
  * polyglot (0.3.1)
  * rack (1.1.0)
  * rack-mount (0.6.3)
  * rack-test (0.5.4)
  * rails (3.0.0.beta4)
  * railties (3.0.0.beta4)
  * rake (0.8.7)
  * thor (0.13.6)
  * treetop (1.4.8)
  * tzinfo (0.3.22)

zhanghong@zh-desktop:~/workspace/topscore$ rails server
=> Booting WEBrick
=> Rails 3.0.0.beta4 application starting in development on http://0.0.0.0:3000
=> Call with -d to detach
=> Ctrl-C to shutdown server
[2010-06-09 17:37:41] INFO  WEBrick 1.3.1
[2010-06-09 17:37:41] INFO  ruby 1.8.7 (2009-06-12) [i686-linux]
[2010-06-09 17:37:46] INFO  WEBrick::HTTPServer#start: pid=6283 port=3000

切换到系统原来ruby

zhanghong@zh-desktop:~$ rvm list

rvm rubies

=> ruby-1.9.1-p378 [ i386 ]

zhanghong@zh-desktop:~$ rvm system
zhanghong@zh-desktop:~$ ruby -v
ruby 1.8.7 (2010-01-10 patchlevel 249) [i486-linux]

参考url
http://asciicasts.com/episodes/200-rails-3-beta-and-rvm