Problem Statement/Rationale

What is going wrong? What action would you like the Engineering team to take?

The mongo shells: mongosh and the older mongo echo the result of the last --eval expression when the --quiet switch has been set.

This is particularly annoying when using the shell to generate output files from mongodb. Files need to be cleansed of the extraneous output. Both mongosh and mongo apparently echo some output to STDOUT, so the results of --eval end up in the output. This appears to be true only for the last expression evaluated by --eval, e.g. --eval 'expr1;expr2;expr3'; only the result of "expr3" will be seen in echoed output.

I am aware that this behavior has be reported in: SERVER-4391, SERVER-23810(closed), SERVER-27159(closed), however, it remains unresolved. The proposed workaround in SERVER-4391 of the "void" solution is a clumsy, especially when embedding in a Bash shell script, at best. I would really like to see this fixed as it's the only way that I know of to pass arguments into a mongosh script.

Steps to Reproduce

How could an engineer replicate the issue you’re reporting?

Using the attached demo script:
> mongosh --quiet --eval 'FIRST="Al";LAST="Paca"' echoTest.js

Expected Results

What do you expect to happen?

Demonstrate extraneous --eval output to STDOUT.
First name: Al
Last name: Paca
Hi my name is: Al Paca

Actual Results

What do you observe is happening?

Paca
Demonstrate extraneous --eval output to STDOUT.
First name: Al
Last name: Paca

Additional Notes

Any additional information that may be useful to include.