Files
nushell/crates/nu-std
Bahex 52604f8b00 fix(std/log): Don't assume env variables are set (#15980)
# Description
Commands in `std/log` assume the `export-env` has been run and the
relevant environment variables are set.
However, when modules/libraries import `std/log` without defining their
own `export-env` block to run `std/log`'s, logging commands will fail at
runtime.

While it's on the author of the modules to include `export-env { use
std/log [] }` in their modules, this is a very simple issue to solve and
would make the user experience smoother.

# User-Facing Changes
`std/log` work without problem when their env vars are not set.

---------

Co-authored-by: Bahex <17417311+Bahex@users.noreply.github.com>
Co-authored-by: 132ikl <132@ikl.sh>
2025-06-16 12:31:17 -04:00
..
2023-04-07 13:39:21 -07:00

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