For loading external script into MongoSh current session, currently we have the load() function, which is enough for the task. But I found myself using my own functions instead. So I would like to describe those as suggestion to improve MongoSh:

loadScript()

This function is basically has the same function with load(). But has 1 major difference: all relative paths in the script has the same base directory with the script itself, not the current MongoSh working directory.
For example:
- Script "D:\MyProject\src\script.js" have these references: "test.js", "../test2.js"
- Current working dir process.cwd(): "C:\MongoSh"
- Path resolved using load("D:\MyProject\src\script.js"): "C:\MongoSh\test.js", "C:\test2.js"
- Path resolved using loadScript("D:\MyProject\src\script.js"): "D:\MyProject\src\test.js", "D:\MyProject\test2.js"

My implementation:

const loadScript = function (name) {
  const currentDir = path.resolve();
  const absPath = path.resolve(name);
  try {
    process.chdir(path.dirname(absPath));
    load(path.basename(absPath));
  } catch (e) {
    print(e);
  }
  process.chdir(currentDir);
}

loadFolder()

This function load all scripts in folder and its nested folders (including symbolic links) using loadScript() behavior.

Why I use this in the first place? Because of .mongoshrc.js. I have a lot of self implement functions, so I put them all in mongoshrc folder in the same location with .mongoshrc.js. And then load them all inside .mongoshrc.js. But since load() function do not interpreted relative path based on script location, so I have to change my working directory like this:

{
  const currentDir = path.resolve();
  process.chdir(`${process.env.HOME ?? process.env.USERPROFILE}/mongoshrc`);
  load(`myScripts.js`);
  process.chdir(currentDir);
}

It is better if .mongosh.js loaded with loadScript(), then the script is just:

loadScript(`mongoshrc/myScripts.js`);

or

loadFolder(`mongoshrc`);

Hope I make myself clear. Thanks for reading.