Re: [agl-dev-community] Error when starting helloworld-native-application test widget

["Stephane Desneux" <stephane.desneux@xxxxxxx>]

Hi Joel,

helloworld-native-application depends on agl-service-helloworld (API
'helloworld') but it's not installed by default in AGL images. So, you must grab
it from here: https://git.automotivelinux.org/apps/agl-service-helloworld
and install it too.

When I tried to reproduce your issue, I also found a minor bug in
helloworld-native-application (mess up with log file). Please use my latest
commit from today:
https://github.com/iotbzh/helloworld-native-application/commit/fe2c9589d6018176b08af9afadb489f86d534091

So finally, it works as expected. Here's a capture of my test session:

Build the 2 widgets from an AGL docker container where SDK is installed:
-------------------------------------------------------
# . /xdt/sdk/environment-setup-aarch64-agl-linux
# git clone https://git.automotivelinux.org/apps/agl-service-helloworld
# agl-service-helloworld/autobuild/agl/autobuild package
# scp agl-service-helloworld/build/*.wgt root@h3ulcb:/tmp/
# git clone https://github.com/iotbzh/helloworld-native-application.git
# helloworld-native-application/autobuild/agl/autobuild package
# scp helloworld-native-application/build/*.wgt root@h3ulcb:/tmp/
-------------------------------------------------------

Then install on the board:
-------------------------------------------------------
$ ssh root@h3ulcb
root@h3ulcb:~# afm-util install /tmp/agl-service-helloworld.wgt
{
  "added":"agl-service-helloworld@1.0-7a5a796"
}
root@h3ulcb:~# afm-util install /tmp/helloworld-native-application.wgt
{
  "added":"helloworld-native-application@0.1-fe2c958"
}
-------------------------------------------------------

And finally run the native app, which calls the verb 'ping' on helloworld API
every 10s and appends the json result to a log file in /tmp.
-------------------------------------------------------
root@h3ulcb:~# afm-util start helloworld-native-application@0.1-fe2c958
8323
root@h3ulcb:~# tail -f /tmp/helloworld.log
  }
}{
  "response":0,
  "jtype":"afb-reply",
  "request":{
    "status":"success",
    "info":"Ping count = 0",
    "uuid":"29c3357f-2083-49a8-9597-3136120728d3"
  }
}{
  "response":1,
  "jtype":"afb-reply",
  "request":{
    "status":"success",
    "info":"Ping count = 1"
  }
}
...
-------------------------------------------------------

Every 10 seconds, a new response block is added to the log.

Note that the helloworld-native-application is a non-graphical app, so don't
expect anything on the screen :)

Hope this helps!
---
Stephane Desneux - CTO - IoT.bzh
stephane.desneux@xxxxxxx - www.iot.bzh

On 14/11/2019 09:02, Joel Catala wrote:
> Hello everyone.
> 
> My team is working on creating a custom widget to be added to the AGL homescreen. 
> 
> They've tried (and myself as well) to build the helloworld example widget
> from https://github.com/iotbzh/helloworld-native-application.
> 
> They are able to build the widget, install it on the target device (in their
> case a qemu machine) but then they are running into the following issues:
> - the service doesn't start with the error:
> 
> qemux86-64:~# afm-util start helloworld-native-application@0.1-fe47611
> ERROR:  cannot-start
> 
> - 'journalctl -f' does not output anything too useful (at least we think):
> 
> qemux86-64:~# journactl -f
> [...]
> Oct 25 07:51:23 qemux86-64 afm-system-daemon[265]:  ERROR: can't start system
> unit afm-appli-helloworld-native-application--0.1-fe47611--main@.service for uid
> 0
> [/opt/workdir2/agl/hh/build/tmp/work/corei7-64-agl-linux/af-main/halibut+gitAUTOINC+533d5a1a51-r0/git/src/afm-urun.c:252]
> [...]
> 
> - 'afm-utils ps' outputs nothing:
> 
> qemux86-64:~# afm-util ps
> [
> ]
> 
> Any idea what is going on? What are we doing wrong?
> Let me know what kind of additional information you need and I'll get it.
> 
> Thank you in advance for your help.
> 
> PS: sorry if the formatting is not a good, I'm not familiar with the syntax to
> be used for e.g. code blocks ...
> 
> Best regards,
> Joel Catala
> Director, Engineering
> Tuxera
> 

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