[gPXE-devel] Minor Scripting Improvements

[Shao Miller]

Shao Miller wrote:
> ...Stefan shared some insights today regarding the 'loopif' command's 
> proximity to the flow control functionality that we eventually 
> desire...  Once flow control "proper" has been implemented, 'loopif' 
> could be rendered redundant; removing it at that time would obviously 
> not be a pleasant option....

Here's[1] a 409-byte (uncompressed) patch which includes 'exit', ':', 
'goto', 'if'.  Thanks for the great discussion, Stefan, it was fun 
having a look at what these minor additions to the scripting system 
could look like from the user's point of view. :)

An example script for iteration is included.  One can build and test with:

$ make EMBEDDED_IMAGE=ifgotoexit.gpxe,iter.gpxe bin/gpxe.pdsk
...
$ qemu -fda bin/gpxe.pdsk -boot a

- Shao Miller

[1] 
http://git.etherboot.org/?p=people/sha0/gpxe.git;a=commitdiff;h=3728015d4a52f6386d6093e7e192aee52ad0d952