brew管理node的版本

转载请注明出处：http://my.oschina.net/uniquejava/blog/491030


brew详解：http://stackoverflow.com/questions/3987683/homebrew-install-specific-version-of-formula
最终我使用的命令：
1. 查看当前node版本
$ ls -l `which node`
lrwxr-xr-x  1 cyper  admin  30 Jul 26 12:09 /usr/local/bin/node -> ../Cellar/node/0.12.7/bin/node

2. 查看已经安装过的所有版本

$ ls /usr/local/Cellar/node*
/usr/local/Cellar/node:
0.12.7

/usr/local/Cellar/node010:
0.10.40

3。查看某个node标签的详细信息
 $ brew info node
或brew info node010

4。如果从第二步的结果中可以找到0.10.40的node，则可以直接switch过去
$ brew switch node010 0.10.40

4. 如果先前没有安装0.10的版本，可以查看所有可用的版本，从这里可以找到homebrew/versions/node010，这正是我后面安装所需要的版本。
 $brew search node

5. 直接安装会提示必须先unlink现有的符号连接
 $ brew unlink node

6. unlink后再安装就开始下载并安装了。
 $ brew install homebrew/versions/node010
==> Installing node010 from homebrew/homebrew-versions
==> Downloading https://homebrew.bintray.com/bottles-versions/node010-0.10.40.yosemite.bottle.tar.gz

7. 查看node
$ node -v
0.10.40


###版本切换测试

$ brew unlink node010
Unlinking /usr/local/Cellar/node010/0.10.40... 6 symlinks removed
 $ brew switch node 0.12.7
Cleaning /usr/local/Cellar/node/0.12.7
6 links created for /usr/local/Cellar/node/0.12.7
 $ brew unlink node
Unlinking /usr/local/Cellar/node/0.12.7... 7 symlinks removed
 $ brew switch node 0.10.40
Error: node does not have a version "0.10.40" in the Cellar.
Versions available: 0.12.7
 $ brew switch node010 0.10.40
Cleaning /usr/local/Cellar/node010/0.10.40
5 links created for /usr/local/Cellar/node010/0.10.40
 $ node -v
v0.10.40

8. 如果是全新安装：

先执行brew search node
然后执行brew install homebrew/versions/node010

9. brew设置http代理：
执行man brew再搜索proxy就可以找到解决办法
tools can download via a proxy. It's common for these tools to read  proxy  parameters  from environment variables.

For  the majority of cases setting http_proxy is enough. You can set this in your shell profile, or you can use it before a brew command:

http_proxy=http://<host>:<port> brew install foo

If your proxy requires authentication:

http_proxy=http://<user>:<password>@<host>:<port> brew install foo