How to make android:versionName in AndroidManifest.xml changed automatically in eclipse?

I want to change android:versionName each time when I releas开发者_Go百科e apk.

Are there any eclipse plugin or some other ways that can help it automatically change along with my code's compilation?

For example, today is 10/09/2011, I want the value android:versionName in AndroidManifest.xml be set to 1.0.0.1009

Not using eclipse sorry (but with Ant yes , see this) , i know it can be boring to do that . But you don't release everyminute , no?

MODIFIED

Ant way , the use of Ant properties

Tomorrow i'll try to find more doc about if you need it