[U-Boot] [PATCH] env: Add the ability to merge the saved env with the default.

[Mike Frysinger]

On Tuesday 14 February 2012 18:30:55 Doug Anderson wrote:
> Create a saved enviroment with this env variable set to "1" to merge the
> saved environment on top of the default environment.  The idea is that your
> saved environment would just contain variables that you'd like to override
> from the default so that as you update u-boot (w/potential changes to the
> default) you get all the updates.
>
> This is really most useful when you have a tool like fw_setenv to manage
> your saved environment.  Using 'saveenv' to save your environment will saved
> the _merged_ environment (AKA it won't unmerge things).

this is kind of a crappy interface.  also, doesn't the existing `env import` 
do this ?
 * env import [-d] [-t | -b | -c] addr [size]
 *  -d: delete existing environment before importing;
 *      otherwise overwrite / append to existion definitions

so if we "imported" the default, we'd get this ?

i think someone recently was doing work on default env handling.  but wasn't 
following it too closely.
-mike
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