I have just uploaded the first Premake 4.0 release candidate to SourceForge. This new major version marks a complete ground-up rewrite featuring:

• A new, more extensible project syntax
• More robust syntax validation
• A new command-line format, with better argument validation
• Improved path handling across all project settings
• An upgrade to Lua 5.1.4
• Many, many bug fixes

Please give it a try and let me know what you think. Based on user feedback, I will either make a new release candidate in two weeks or, if there are no major bugs found, the final 4.0 release (followed by much celebration).

In the meantime, I will be working to flesh out and improve the documentation here on the website. That includes documenting the new custom action and option system, new extensions to the Lua libraries, and new FAQ entries culled from recent questions. Feedback on the documentation is also welcome and appreciated.

Thanks, and enjoy!