mjhjmtu

I have a shell script that gets updates from github and then runs the code that it retrieved. it is located at /home/me/Desktop/refreshCode.sh

-- refreshCode.sh --

#!/bin/bash

cd /home/me/src/ProductionMonitor
sudo /usr/bin git -C /home/me/src/ProductionMonitor pull
sudo cp /home/me/src/ProductionMonitor/* /home/me/Desktop/Production
cd /home/me/Desktop/Production
sudo /usr/bin/python3 prodmain.py >> logfile.data

I know that the shell can launch and runs as expected manually. It opens up the tkinter window and I can interact with the screen.

However I cannot seem to get anything to launch correctly.

I have tried setting up a crontab for @reboot and was not successful.
It never showed the ui

I set up a Systemd service as such.

-- prodmon.service --

[Unit]
Description=Service to run production monitor
After=multi-user.target

[Service]
Type=forking
ExecStart=/home/me/Desktop/refreshCode.sh
User=caleb
Group=caleb
WorkingDirectory=/home/me/Desktop/Production/
PIDFile=/var/run/prodmon.pid

[Install]
WantedBy=multi-user.target

Checking the status of the service after boot, it says that it is running.
however the tkinter UI never shows up.

You should probably not sudo all the stuff; all things are under your own directory.

The main point of your question is, that your script does not know where to display the window. Try adding

echo "DISPLAY=$DISPLAY" >> logfile.data

You will probably see

DISPLAY=

in `logfile.data. Furthermore, if you use:

/usr/bin/python3 prodmain.py >> logfile.data 2>/tmp/errorfile

you will probably see a /tmp/errorfile with something like:

prodmain: Xt error: Can't open display: 
prodmain: DISPLAY is not set

So, that is the reason why it does not display at boot.

Now how to solve it: that depends a lot on what you want.You can start the program from ~/.xinitrc when you log-in to the graphical environment. You can cut the job into two parts: doing the git and cp at boot, and the prodmain from the .xinitrc.