use nu_protocol::ast::Call;
use nu_protocol::engine::{Command, EngineState, Stack, StateWorkingSet};
use nu_protocol::{Category, Example, PipelineData, ShellError, Signature, Span, Type, Value};
#[derive(Clone)]
pub struct Ignore;
impl Command for Ignore {
fn name(&self) -> &str {
"ignore"
}
fn usage(&self) -> &str {
"Ignore the output of the previous command in the pipeline."
}
fn signature(&self) -> nu_protocol::Signature {
Signature::build("ignore")
.input_output_types(vec![(Type::Any, Type::Nothing)])
.category(Category::Core)
}
fn search_terms(&self) -> Vec<&str> {
vec!["silent", "quiet", "out-null"]
}
fn is_const(&self) -> bool {
true
}
fn run(
&self,
_engine_state: &EngineState,
_stack: &mut Stack,
call: &Call,
input: PipelineData,
) -> Result<PipelineData, ShellError> {
input.into_value(call.head);
Ok(PipelineData::empty())
}
fn run_const(
&self,
_working_set: &StateWorkingSet,
call: &Call,
input: PipelineData,
) -> Result<PipelineData, ShellError> {
input.into_value(call.head);
Ok(PipelineData::empty())
}
fn examples(&self) -> Vec<Example> {
vec![Example {
description: "Ignore the output of an echo command",
example: "echo done | ignore",
result: Some(Value::nothing(Span::test_data())),
}]
}
}
#[cfg(test)]
mod test {
#[test]
fn test_examples() {
use super::Ignore;
use crate::test_examples;
test_examples(Ignore {})
}
}