Relative Path in launchd plist - path

Question

I am currently using a plist to run a shell script.
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>Label</key>
<string>com.name.set</string>
<key>Program</key>
<string>/Users/username_here/Desktop/simple.sh</string>
<key>RunAtLoad</key>
<true/>
<key>StartInterval</key>
<integer>5</integer>
<key>StandardErrorPath</key>
<string>/tmp/com.name.example.stderr</string>
<key>StandardOutPath</key>
<string>/tmp/com.name.example.stdout</string>
</dict>
</plist>
This works! But when I change the program name to be
<string>/Desktop/simple.sh</string>
it doesn't run the script. also ~/Desktop/simple.sh does not work.
Is there a way to run the script without knowing the username and using an absolute path?
I am also getting this error message when I tail launchd.
com.apple.xpc.launchd[1] (com.name.example[8178]): Service could not initialize: 14F27: xpcproxy + 13421 [1402][AD0301C4-D364-31CE-8BA7-B5DBECE64D0A]: 0x2
Thanks!

Answer 1

Using a shell as arg0 and giving it a path relative to the user's home folder works for me:
<key>ProgramArguments</key>
<array>
<string>zsh</string>
<string>-c</string>
<string>~/CLI/scripts/list_open_jira_tickets --skip=5297 > ~/CLI/tmp/open_jira_tickets.txt</string>
</array>

Answer 2

If daemon is run as a per-user agent (installed in ~/Library/LaunchAgent) you can use a period get the relative path. Which would be the home folder (~/)
So you can do this:
<key>Program</key>
<string>./Desktop/simple.sh</string>
It might be nicer to save your program next to your plist:
./Library/LaunchAgents/simple.sh