[gPXE-devel] [PATCH] [script] Control flow using if and goto

[Shao Miller]

Stefan Hajnoczi wrote:
>
> ...
>   : <label>
>
>   Define a label
>
>   goto <label>
>
>   Jump to label in a script.  Not supported from the shell.
>

Suppose I have the following script:

#!gpxe
set space:hex 20
set colon:string :
set foo:string foo
set mylabel:hex ${colon:hex}:${space:hex}:${foo:hex}
echo Do some stuff
if ${some-condition} goto ${foo:string}
goto end
${mylabel:string}
echo Got to ${foo:string}
: end

I wanted to confirm that this patch's implementation of ': label' could 
never establish a "foo" label due to the expansion and could never 
output "Got to foo" regardless of some-condition.  Is that so?  If so, 
does it matter?  Might anyone wish to dynamically generate labels for 
some reason?

- Shao Miller
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