[PATCH] RFC: nvedit: support doing one (extra) expansion of the value in "env set"

[Wolfgang Denk]

Dear Rasmus,

In message <20200216152427.E80C7240036 at gemini.denx.de> I wrote:
>
> So lets change my little script to add setting "left":
>
> 	slot=none
> 	for i in $BOOT_ORDER ; do
> 	setenv tmp_cmd 'setexpr tmp_val sub '^' "" $'BOOT_${i}_LEFT
> 	run tmp_cmd
> 	test $slot = none && test $tmp_val -gt 0 && slot=$i && left=$tmp_val
> 	done
> 	echo "## Chosen Slot = $slot ; Left = $left"
>
> Result:
>
> 	## Chosen Slot = C ; Left = 2

Actually I'm stupid.  It's much easier this way, and without the
ugly printed messages:

	setenv BOOT_ORDER A B C D
	setenv BOOT_A_LEFT 0
	setenv BOOT_B_LEFT 0
	setenv BOOT_C_LEFT 2
	setenv BOOT_D_LEFT 5

	slot=none
	for i in $BOOT_ORDER ; do
	setenv tmp_cmd 'setenv tmp_val $'BOOT_${i}_LEFT
	run tmp_cmd
	test $slot = none && test $tmp_val -gt 0 && slot=$i && left=$tmp_val
	done
	echo "## Chosen Slot = $slot ; Left = $left"

Best regards,

Wolfgang Denk

-- 
DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
A modem is a baudy house.