How to load a file from the same directory as the script, in MongoDB shell - mongodb

Question

I'm running a bash script that executes a javascript file in the Mongo shell:
outerscript.sh
SCRIPTPATH="$( cd "$(dirname "$0")" ; pwd -P )"
LOGDIR=~/logs
LOGFILE=$LOGDIR/outerscript.log
mongo < $SCRIPTPATH/jsscript.js >> $LOGFILE 2>&1
jsscript.js
load(myVars.js);
MongoDB is v4.0.19
The script may be run locally or on a remote server, and it may be run from the command line or from a cron job, and I want to load in myVars.js which is always in the same folder as outerscript.sh.
I can't find a way to load myVars.js when running outerscript.sh from a cron job.
pwd() returns the user's home directory, not the location of the currently running script, so this doesn't work for the cron job:
load(pwd() + '/myVars.js');
This also doesn't work for the cron job, I'm guessing for the same reason:
load('./myVars.js');
Alternatively, is there another way to pass variables into my JavaScript file, that will still let me log output to the logfile? As far as I can tell, you can't combine --eval with logging output to a file, and I haven't found a way to read environment variables directly from inside the JS file.
Thanks!

Answer 1

You don't need a redirect, try mongo $SCRIPTPATH/jsscript.js >> $LOGFILE 2>&1
See
$ mongo --help
MongoDB shell version v4.4.1
usage: mongo [options] [db address] [file names (ending in .js)]
db address can be:
foo foo database on local machine
192.168.0.5/foo foo database on 192.168.0.5 machine
192.168.0.5:9999/foo foo database on 192.168.0.5 machine on port 9999
mongodb://192.168.0.5:9999/foo connection string URI can also be used
You can use cat() in your js script.
e.g.
echo '{"path": "some folder"}' > /tmp/foldername.js
Then in your js script:
var txt = cat("/tmp/foldername.js")
var folderObj = JSON.parse(txt)
Then you can use folderObj object in your script.
Why do you not simply use SCRIPTPATH="$(dirname "$0")"?

Answer 2

Wernfried Domscheit answered my question perfectly and I have accepted that answer.
I also worked out how to pass in environment variables as parameters and am posting it here just in case it helps anybody.
outerscript.sh
SCRIPTPATH="$( cd "$(dirname "$0")" ; pwd -P )"
ENVVARS='var mongoAddress='\'"${MONGO_ADDRESS}"\''; var databaseName='\'"${DATABASE_NAME}"\'
mongo --eval "${ENVVARS}" $SCRIPTPATH/jsscript.js >> $LOGFILE 2>&1
jsscript.js
print(mongoAddress);
print(databaseName);