mirror of
https://github.com/nushell/nushell.git
synced 2025-06-07 18:46:49 +02:00
95b78eee25
# Description
The meaning of the word usage is specific to describing how a command
function is *used* and not a synonym for general description. Usage can
be used to describe the SYNOPSIS or EXAMPLES sections of a man page
where the permitted argument combinations are shown or example *uses*
are given.
Let's not confuse people and call it what it is a description.
Our `help` command already creates its own *Usage* section based on the
available arguments and doesn't refer to the description with usage.
# User-Facing Changes
`help commands` and `scope commands` will now use `description` or
`extra_description`
`usage`-> `description`
`extra_usage` -> `extra_description`
Breaking change in the plugin protocol:
In the signature record communicated with the engine.
`usage`-> `description`
`extra_usage` -> `extra_description`
The same rename also takes place for the methods on
`SimplePluginCommand` and `PluginCommand`
# Tests + Formatting
- Updated plugin protocol specific changes
# After Submitting
- [ ] update plugin protocol doc
42 lines
1.2 KiB
Rust
42 lines
1.2 KiB
Rust
use nu_engine::command_prelude::*;
|
|
|
|
#[derive(Clone)]
|
|
pub struct LetEnv;
|
|
|
|
impl Command for LetEnv {
|
|
fn name(&self) -> &str {
|
|
"let-env"
|
|
}
|
|
|
|
fn signature(&self) -> Signature {
|
|
Signature::build(self.name())
|
|
.input_output_types(vec![(Type::Nothing, Type::Nothing)])
|
|
.allow_variants_without_examples(true)
|
|
.optional("var_name", SyntaxShape::String, "Variable name.")
|
|
.optional(
|
|
"initial_value",
|
|
SyntaxShape::Keyword(b"=".to_vec(), Box::new(SyntaxShape::MathExpression)),
|
|
"Equals sign followed by value.",
|
|
)
|
|
.category(Category::Removed)
|
|
}
|
|
|
|
fn description(&self) -> &str {
|
|
"`let-env FOO = ...` has been removed, use `$env.FOO = ...` instead."
|
|
}
|
|
|
|
fn run(
|
|
&self,
|
|
_: &EngineState,
|
|
_: &mut Stack,
|
|
call: &Call,
|
|
_: PipelineData,
|
|
) -> Result<PipelineData, ShellError> {
|
|
Err(nu_protocol::ShellError::RemovedCommand {
|
|
removed: self.name().to_string(),
|
|
replacement: "$env.<environment variable> = ...".to_owned(),
|
|
span: call.head,
|
|
})
|
|
}
|
|
}
|