Re: Using hash instead of timestamps to check for changes.

[Daniel Herring]

Hi all,

There's been a lot of good discussion on this.  Extensibility, avoiding 
unnecessary rebuilds, preventing missed rebuilds, ensuring checks don't 
get re-run every time, etc.

Those are hard issues to get right.


Persistent storage of the non-timestamp checks is another issue that has 
been mentioned.  Here are three ideas that might help.

http://en.wikipedia.org/wiki/Extended_file_attributes

http://git-scm.com/book/en/v2/Git-Internals-Git-Objects

https://github.com/apenwarr/redo#how-does-redo-store-dependencies



- Daniel