Add extern def which allows raw arguments (#8956)

# Description

Extends the `extern` syntax to allow commands that accept raw arguments.
This is mainly added to allow wrapper type scripts for external
commands.

This is an example on how this can be used:

```nushell
extern foo [...rest] { 
  print ($rest | str join ',' ) 
}
foo --bar baz -- -q -u -x
# => --bar,baz,--,-q,-u,-x
```

(It's only possible to accept a single ...varargs argument in the
signature)

# User-Facing Changes

No breaking changes, just extra possibilities.

# Tests + Formatting

Added a test for this new behaviour and ran the toolkit pr checker

# After Submitting

This is advanced functionality but it should be documented, I will open
a new PR on the book for that

Co-authored-by: Jelle Besseling <jelle@bigbridge.nl>
This commit is contained in:
Jelle Besseling
2023-04-28 09:06:43 +02:00
committed by GitHub
parent 6f9b9914cf
commit 44493dac51
3 changed files with 71 additions and 41 deletions

View File

@ -141,3 +141,11 @@ fn def_with_paren_params() {
assert_eq!(actual.out, "3");
}
#[test]
fn extern_with_block() {
let actual =
nu!("extern foo [...rest] { print ($rest | str join ',' ) }; foo --bar baz -- -q -u -x");
assert_eq!(actual.out, "--bar,baz,--,-q,-u,-x");
}