nushell/crates/nu-std
2025-04-29 19:31:45 -04:00
..
src Custom command attributes (#14906) 2025-02-11 06:34:51 -06:00
std Improve std/log performance (#15614) 2025-04-22 13:00:20 -05:00
std-rfc Revert "Fix kv set with a closure argument" (#15648) 2025-04-26 23:00:00 -04:00
tests Revert "Fix kv set with a closure argument" (#15648) 2025-04-26 23:00:00 -04:00
Cargo.toml Bump version for 0.104.0 release (#15664) 2025-04-29 19:31:45 -04:00
CONTRIBUTING.md Surprising symlink resolution for std path add (#13258) 2024-06-28 18:11:48 -05:00
LICENSE add LICENSE to nu-std (#8803) 2023-04-07 13:39:21 -07:00
README.md Change the usage misnomer to "description" (#13598) 2024-08-22 12:02:08 +02:00
testing.nu Add --plugins flag to nu-std/testing.nu (#15552) 2025-04-16 23:20:04 +02:00

Welcome to the standard library of `nushell`!

The standard library is a pure-nushell collection of custom commands which provide interactive utilities and building blocks for users writing casual scripts or complex applications.

To see what's here:

> use std
> scope commands | select name description | where name =~ "std "
#┬───────────name────────────┬───────────────────description───────────────────
0│std assert                 │Universal assert command
1│std assert equal           │Assert $left == $right
2│std assert error           │Assert that executing the code generates an error
3│std assert greater         │Assert $left > $right
4│std assert greater or equal│Assert $left >= $right
             ...                                     ...
─┴───────────────────────────┴─────────────────────────────────────────────────

🧰 Using the standard library in the REPL or in scripts

All commands in the standard library must be "imported" into the running environment (the interactive read-execute-print-loop (REPL) or a .nu script) using the use command.

You can choose to import the whole module, but then must refer to individual commands with a std prefix, e.g:

use std

std log debug "Running now"
std assert (1 == 2)

Or you can enumerate the specific commands you want to import and invoke them without the std prefix.

use std ["log debug" assert]

log debug "Running again"
assert (2 == 1)

This is probably the form of import you'll want to add to your env.nu for interactive use.

✏️ contribute to the standard library

You're invited to contribute to the standard library! See CONTRIBUTING.md for details