Re: [RAUC] Progress indication

[Enrico Joerns <ejo@pengutronix.de>]

Hi Leif,

On 04/26/2017 06:03 PM, Middelschulte, Leif wrote:
> Hi,
>
> I want to flash a µCtrl, as part of a "Install group" using RAUC and (if necessary) a custom Handler (?).
>
> Looking at https://github.com/rauc/rauc/blob/master/test/install-content/custom_handler.sh I was wondering about the progress indication.
> What's the supposed way to extend RAUC to handle some kind of binary bundled within the raucb and communicate the update progress back to the (already implemented) Update Controller?

the `custom handler` you took a look at is something different than what 
you require. It is a way to fully customize the entire RAUC installation 
process using a script or a binary.

I guess this is not what you intend to do.

If I got it right, you only want to have a custom handling for a single 
slot class.
This is what RAUCs `hooks` [1] are for. Or, to be more detailed, what 
the per-slot `install` hook [2] is for.

Hooks are defined in your Bundles manifest and provided by a single 
`hook` script that must be placed inside the bundle and referred to in 
the bundle section `[hooks]`:

   [hooks]
   filename=my-hooks.sh

Then you have to add to your µCtrl-Slots image section the line

   [image.uctrl]
   ...
   hooks=install

This will make RAUC calling the hook skript instead of performing the 
default installation routine for this slot.

In the hook script you should check for being executed with the 
arguments matching your slot. An example for this is in the 
documentation. Slightly adapted to your needs it will look something 
like this:

   #!/bin/sh

   case "$1" in
           slot-install)
                   # only uctrl needs to be handled
                   test "$RAUC_SLOT_CLASS" = "uctrl" || exit 0

                   uctrl-update-routine "$RAUC_IMAGE_NAME"
                   ;;
           *)
                   exit 1
                   ;;
   esac

   exit 0


Does that help you?


Best regards

Enrico


[1] 
http://rauc.readthedocs.io/en/latest/using.html#bundle-based-customization-hooks
[2] http://rauc.readthedocs.io/en/latest/using.html#install-hook

-- 
Pengutronix e.K.                           | Enrico Jörns                |
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