Problem Description

mongodump --queryFile requires a vaild JSON input file. When a regex statement is formatted as valid JSON this fails since it is no longer a vaild JSON expression.

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Steps to Reproduce

Run mongodump with a query input file which contains a regex:

{{mongodump "mongodb+srv://$sourceCluster.$sourceProject.mongodb.net/" --username="$sourceUser" --password="$sourcePwd" --db <dbname> --collection <collection name> --queryFile ./queryfile.json --archive=collectionDump.dump }}

queryfile with a vaild query (tested in compass)
this file fails to run due to invalid JSON, the query it self is fully functioning in compass

{ "$or": [{

"devicemac":

{ "$regex": /^01:01:01:03:FF:/ }

},{
"devicemac":

{ "$in": [ "01:01:01:01:01:0F", "01:01:01:01:01:15", "01:01:01:01:01:2B" ]}

}]}

queryfile with a vaild JOSN
this file is processed to run but the end result is in incorrect
only change put the parameter for $regex into quotes. This makes it valid JSON but an invalid regex.

{ "$or": [{
"devicemac": {
"$regex": "/^01:01:01:03:FF:/"
}
},{
"devicemac":

{ "$in": [ "01:01:01:01:01:0F", "01:01:01:01:01:15", "01:01:01:01:01:2B" ]}

}]}

Expected Results

mongodump should dump only these documents which fit to the query which was successfully tested in compass - this query is copied to a queryfile and passed to mongodump as parameter

Actual Results
the query with   "$regex": /^01:01:01:03:FF:/   works correct in compass and provides a correct amount of documents but is not accepted from mongodump as valid JSON.

the query with   "$regex": "/^01:01:01:03:FF:/"   does not provide a correct amount of documents since it is invalid regex but is accepted from mongodump as valid JSON.