On Wed, 2022-07-13 at 15:32 +0200, Nicolas Jeker wrote:
> Thanks Martin and Mike for your explanations and tips.
>
> So, I've done a lot of testing today and it seems I simplified the
> example in my first email a bit too much. The example as-is works fine
> when switching DISTROs as far as I can tell. The problem only arises
> when wildcards are used.
>
> Changing my initial example like this should trigger the behaviour I've
> initially described:
>
> SRC_URI:append:mydistro-dev = " file://application-dbg.service"
>
> do_install {
> # ...snip...
> # systemd service
> install -d ${D}${systemd_system_unitdir}
> install -m 0644 ${WORKDIR}/*.service ${D}${systemd_system_unitdir}
> }
>
> do_install:append:mydistro-dev() {
> # debug systemd services
> install -d ${D}${systemd_system_unitdir}
> install -m 0644 ${WORKDIR}/application-dbg.service
> ${D}${systemd_system_unitdir}
> }
>
> Notice the *.service in do_install.
>
> From my testing, this is how contamination happens:
>
> 1) Build with 'DISTRO=mydistro bitbake application'. All tasks for the
> recipe are run and the directories in WORKDIR are populated, including
> the "application.service" file.
> 2) Build with 'DISTRO=mydistro-dev bitbake application'. do_unpack is
> rerun and places the additional "application-dbg.service" file in
> WORKDIR.
> 3) Switching back to 'mydistro' will get the recipe from sstate cache,
> which works fine.
> 4) Changing application.bb and rebuilding with 'DISTRO=mydistro bitbake
> application' reruns do_install (as expected). This leads to the
> packages do_install picking up the additional "application-dbg.service"
> file left behind by the invocation in step 2).
>
> Mike, Martin: Do you remember in which cases you encountered problems
> when sharing the build directory?
This is unfortunately a known issue and is one reason I'd like to stop
recipes downloading files to WORKDIR. Sadly changing that to fix this
bug is very invasive and painful but I think we do need to do so
somehow.
Cheers,
Richard
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