Hi Paul,
Rodger, thanks.
Strangely, log.do_rootfs says:
NOTE: The image creation groups are: [['ext3', 'tar'], ['sdcard']]
and
NOTE: Running image creation script for sdcard:
.../tmp/work/mymachine-poky-linux-gnuabi/my-image/1.0-r0/temp/create_image.sdcard
...
and
NOTE: Creating symlinks for sdcard image ...
But nothing between the last two, as if the output from "create_image.sdcard"
is not being captured after all.
That script is present, and appears to contain everything from my bbclass.
The xxxx.rootfs.sdcard is being created in deploy/images, albeit with bogus
contents (which is why I want to debug the script), so I have every reason to
think that img_creation_func() is indeed being called.
However, not even a simple "echo" at the start of img_creation_func() leaves
anything visible in log.do_rootfs.
I guess either I'm still doing something wrong, or the problem with "bbnote",
etc., is not just confined to the UI.
I'm using dizzy, btw.
Greets,
--
jim
-----Ursprüngliche Nachricht-----
Von: Paul Eggleton [mailto:paul.eggle...@linux.intel.com]
Gesendet: Freitag, 22. Mai 2015 11:22
An: Spriggs, Jim
Cc: yocto@yoctoproject.org
Betreff: Re: [yocto] How to debug a custom image creation script?
Hi Jim,
On Friday 22 May 2015 08:47:23 Spriggs, Jim wrote:
> I'd like to have my custom layer generate an sdcard image, so I've
> implemented a classes/image_types_xxxxx.bbclass. This contains,
> amongst other things, the (bash) function generate_xxxxx_sdcard().
> Being a naïve n00b, I assumed that I could just scatter "bbnote"s,
> "echo"s, or even "set -x" around inside the function to my heart's
> content, and would be able to see the output "somewhere".
> Trouble is, I can't find it anywhere!
>
> So what is the best/approved/obvious way to get debug traces out of a
> bbclass function?
>
> If I am already doing the Right Thing, where should I be looking for
> the output?
You should see output printed here in log.do_rootfs for the image you are
building. In case you're unaware, you can find this in the directory pointed to
by the T variable for the recipe, the following command will show this to you:
bitbake -e your-imagename | grep ^T=
As an aside, we do want to change the bbwarn/bbnote/bberror etc. shell
functions to output to the UI just like the python equivalents do, it's a known
issue that they do not. There's a bug open for that (assigned to me as it
happens):
https://bugzilla.yoctoproject.org/show_bug.cgi?id=5275
I should really get that one sorted out for the next release.
Cheers,
Paul
--
Paul Eggleton
Intel Open Source Technology Centre
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