[yocto] My config got stuck in the toaster

[William Mills]

On 12/27/2014 10:40 AM, Mills, William wrote:
> OK, you are not going to believe me but I swear this really happened ...
>
> I have been playing with YP 1.7 over the break.
> I thought I would give toaster a try so I had it running in the background as I tried various builds.
> Somehow I got into a state where changes to my conf/local.conf file were being ignored.
> I fixed it by stopping toaster.
>
> Here is the sequence as I remember:
>
> I was doing builds for qemuarm.
> At some point I started toaster "source toaster start"
> It could have been from a clean build dir but probably I had done a couple of test builds first.
> For qemuarm I built:
>      core-image-minimal, meta-toolchain, core-image-sato, core-image-sato-sdk, world
> I definitely poked around the toaster UI at some of those builds.
> Next in the same build dir (and the same screen session) I edited conf/local.conf to
> MACHINE = qemux86
> I then did core-image-sato again
> It built for qemuarm
> I double check conf/* and ENV settings.
> I rm -rf cache
> still builds for qemuarm
> I stopped toaster with "source toaster stop"
> I rm -rf cache again for safe keeping
> I tried core-image-sato again and it started building for qemux86.
>
> I tried to reproduce this with a clean build dir and a trivial target "bitbake -c clean ed"
> With or without toaster running it always detects the config change and rebuilds the cache.
> In the process I have now learned that removing the cache dir does not cause a reparse as I expected.
> However a config change does.
>
> I thought I had a theory w/ persistent bitbake process and files being kept open
> but I can't connect the dots and I can't reproduce it.
>

Actually it is easy to reproduce.

The first time I tried I don't think toaster was starting as port 8000
was busy. I thought I had stopped the other instance but I guess not.

To reproduce this I did this:

yocto$ $ . poky/oe-init-build-env toasted-build
yocto/toasted-build$ source toaster start
yocto/toasted-build$ bitbake -c clean ed
	runs with MACHINE = "qemux86"
yocto/toasted-build$ mcedit conf/local.conf
	change to MACHINE ??= "qemuarm"
yocto/toasted-build$ bitbake -c clean ed
	still runs for qemux86
yocto/toasted-build$ source toaster stop
yocto/toasted-build$ bitbake -c clean ed
	runs for qemuarm

Am I starting toaster in the wrong way to be just an observer?
I learned how to start toaster this way from:
https://www.yoctoproject.org/documentation/toaster-manual-17  ->
	First link is "How to install and run Toaster locally" ->
https://wiki.yoctoproject.org/wiki/Setting_up_a_local_instance_of_Toaster

The Yocto Project Dev guide say the same thing:
https://www.yoctoproject.org/docs/current/dev-manual/dev-manual.html#examining-builds-using-toaster

> Any Ideas?
>
> BTW: Building "world" does not look nice in toaster.  It list 100s of build targets instead of just "world".
>
> Thanks,
> Bill
>