use nu_engine::command_prelude::*;
#[derive(Clone)]
pub struct OverlayList;
impl Command for OverlayList {
fn name(&self) -> &str {
"overlay list"
}
fn usage(&self) -> &str {
"List all active overlays."
}
fn signature(&self) -> nu_protocol::Signature {
Signature::build("overlay list")
.category(Category::Core)
.input_output_types(vec![(Type::Nothing, Type::List(Box::new(Type::String)))])
}
fn extra_usage(&self) -> &str {
"The overlays are listed in the order they were activated."
}
fn run(
&self,
_engine_state: &EngineState,
stack: &mut Stack,
call: &Call,
_input: PipelineData,
) -> Result<PipelineData, ShellError> {
let active_overlays_engine: Vec<Value> = stack
.active_overlays
.iter()
.map(|s| Value::string(s, call.head))
.collect();
Ok(Value::list(active_overlays_engine, call.head).into_pipeline_data())
}
fn examples(&self) -> Vec<Example> {
vec![Example {
description: "Get the last activated overlay",
example: r#"module spam { export def foo [] { "foo" } }
overlay use spam
overlay list | last"#,
result: Some(Value::test_string("spam")),
}]
}
}