Programmatical Require API

[ghost]

Prerequisites

• Checked that your issue hasn't already been filed by cross-referencing issues with the faq label
• Checked next-gen ES issues and syntax problems by using the same environment and/or transpiler configuration without Mocha to ensure it isn't just a feature that actually isn't supported in the environment in question or a bug in your code.
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Description

How do I use the --require flag programmatically? The faq mentions nothing about this.

Versions

• The output of mocha --version and node node_modules/.bin/mocha --version: v5.2.0
• The output of node --version: v10.10.10
• The version and architecture of your operating system: openSUSE Leap 15
• Your shell (bash, zsh, PowerShell, cmd, etc.): bash

[ghost]

I need this for @babel/register, because the alternative (bundling tests with code) is not pretty.

[plroebuck]

If by FAQ, you mean this?
No real magic here at all. Basically boils down to this:

module.paths.push(
  process.cwd(),
  path.join(process.cwd(), 'node_modules'));

// in while loop, do this for each `--require` argument (mod)
require(mod);