关于如何用maven做版本管理，请参考这边文章(http://juvenshun.iteye.com/blog/376422)

mac os 系统下执行下列命令

mvn -s /Users/Johnny/settings.xml release:prepare

抛出如下错误，说svn账号权限不对

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-release-plugin:2.5:prepare (default-cli) on project mbg-plugin: Unable to commit files

[ERROR] Provider message:

[ERROR] The svn command failed.

[ERROR] Command output:

[ERROR] svn: E215004: Authentication failed and interactive prompting is disabled; see the --force-interactive option

[ERROR] svn: E215004: Commit failed (details follow):

[ERROR] svn: E215004: Unable to connect to a repository at URL 'http://192.168.50.120/svn/misc/trunk/tcxy-mbg-plugin'

[ERROR] svn: E215004: No more credentials or we tried too many times.

[ERROR] Authentication failed

[ERROR] -> [Help 1]

[ERROR]

[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.

[ERROR] Re-run Maven using the -X switch to enable full debug logging.

[ERROR]

[ERROR] For more information about the errors and possible solutions, please read the following articles:

[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException

这是由于mac的账号管制的问题(需要付一次权限)，只需要在当前目录下随意执行一个svn命令(比如svn update)，系统会跳出一个提示框，说是否允许svn获取钥匙串里的账号，允许就可以了，然后再执行上面的命令应该就可以了。