extern for core

Define a signature for an external command.

Signature

> extern {flags} (def_name) (params)

Parameters

  • def_name: Definition name.
  • params: Parameters.

Input/output types:

inputoutput
nothingnothing

Examples

Write a signature for an external command

> extern echo [text: string]

Notes

This command is a parser keyword. For details, check: https://www.nushell.sh/book/thinking_in_nu.html