[yocto] Using devtool for adding a systemd service

[Alan Martinovic]

Thanks,
I made a workaround by looking for a sysroot in the tmp-glibc
(not sure why the -glibc part, seems to be called tmp in poky).

Seems like the "sysroot" I was looking for is called rootfs.
So I located it with:

find tmp-glibc -iname rootfs


On Fri, Nov 10, 2017 at 4:19 PM, Fabien Lahoudere <
fabien.lahoudere at collabora.co.uk> wrote:

> Hi
>
> I don't think that devtool will help you in this case.
> IIUC, what you need is to check if your file is populated in the package?
>
> You can verify this by checking package content after the build.
> For example :
>         dpkg-deb -c <package-path>
> will show you all files installed by the package.
>
> I think rpm and opkg provide similar mechanism to extract packages
> contents.
>
> You can also mount your rootfs partition using loop devices.
>
> On Fri, 2017-11-10 at 11:07 +0100, Alan Martinovic wrote:
> > Hi,
> > I need to add a systemd service that needs no additional sources
> > compiled, but just needs an available command executed at boot.
> >
> > I've created a basis for the recipe in my layer:
> >
> > nrf52-usb-systemd/
> > |-- files
> > |   `-- btattach-nrf-acm.service
> > `-- nrf52-usb-systemd.bb
> >
> >
> > together with a recipe template (nrf52-usb-systemd.bb)
> > for which I don't know if works yet.
> >
> >   SUMMARY = "Writes patterns to the fb device"
> >   LICENSE = "MIT"
> >   LIC_FILES_CHKSUM = "file://COPYING.MIT;md5=
> 3da9cfbcb788c80a0384361b4de20420"
> >
> >   inherit systemd
> >
> >   REQUIRED_DISTRO_FEATURES= "systemd"
> >
> >   SRC_URI = "file://btattach-nrf-acm.service"
> >
> >   do_install () {
> >
> >       install -m 0644 ${WORKDIR}/btattach-nrf-acm.service
> ${D}${sysconfdir}/systemd/system
> >    }
> >
> >   NATIVE_SYSTEMD_SUPPORT = "1"
> >   SYSTEMD_PACKAGES = "${PN}"
> >   SYSTEMD_SERVICE_${PN} = "fb-draw.service"
> >
> >
> > I'm not sure I got the install command right and
> > if the service file is making it way to the proper location.
> >
> > Instead of building the whole image, flashing and checking
> > it out, I would like to test how devtool could help here.
> >
> > I execute:
> >
> > devtool build nrf52-usb-systemd
> >
> > this results in a creation of a workspace with the sources files.
> > What I am not seeing is a creation of a device sysroot which would
> > show me that the do_install was correctly written.
> >
> > Given that the device sysroot directory on the host would be called
> > "sysroot" was hoping to be able do confirm that the following took
> > place
> >
> > ${D}${sysconfdir}/systemd/system -> .sysroot/etc/ssytemd/system
> >
> > and confirming there is a
> >
> > .sysroot/etc/ssytemd/system/btattach-nrf-acm.service
> >
> >
> > Is this possible with devtool, or am I misinterpreting
> > what it's purpose is?
> >
> --
> Fabien
> --
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