ac578b8491
* Begin allowing comments and multiline scripts. * clippy * Finish moving to groups. Test pass * Keep going * WIP * WIP * BROKEN WIP * WIP * WIP * Fix more tests * WIP: alias starts working * Broken WIP * Broken WIP * Variables begin to work * captures start working * A little better but needs fixed scope * Shorthand env setting * Update main merge * Broken WIP * WIP * custom command parsing * Custom commands start working * Fix coloring and parsing of block * Almost there * Add some tests * Add more param types * Bump version * Fix benchmark * Fix stuff
61 lines
1.6 KiB
Rust
61 lines
1.6 KiB
Rust
use crate::commands::WholeStreamCommand;
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use crate::prelude::*;
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use nu_errors::ShellError;
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use nu_protocol::{ReturnSuccess, Signature, UntaggedValue};
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pub struct Reverse;
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#[async_trait]
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impl WholeStreamCommand for Reverse {
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fn name(&self) -> &str {
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"reverse"
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}
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fn signature(&self) -> Signature {
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Signature::build("reverse")
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}
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fn usage(&self) -> &str {
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"Reverses the table."
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}
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async fn run(&self, args: CommandArgs) -> Result<OutputStream, ShellError> {
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reverse(args).await
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}
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fn examples(&self) -> Vec<Example> {
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vec![Example {
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description: "Sort list of numbers in descending file size",
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example: "echo [3 1 2 19 0] | reverse",
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result: Some(vec![
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UntaggedValue::int(0).into(),
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UntaggedValue::int(19).into(),
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UntaggedValue::int(2).into(),
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UntaggedValue::int(1).into(),
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UntaggedValue::int(3).into(),
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]),
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}]
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}
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}
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async fn reverse(args: CommandArgs) -> Result<OutputStream, ShellError> {
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let args = args.evaluate_once().await?;
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let (input, _args) = args.parts();
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let input = input.collect::<Vec<_>>().await;
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Ok(futures::stream::iter(input.into_iter().rev().map(ReturnSuccess::value)).to_output_stream())
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}
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#[cfg(test)]
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mod tests {
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use super::Reverse;
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use super::ShellError;
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#[test]
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fn examples_work_as_expected() -> Result<(), ShellError> {
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use crate::examples::test as test_examples;
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Ok(test_examples(Reverse {})?)
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}
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}
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