forked from extern/nushell
f37f29b441
* start playing with ways to use the uniq command * WIP * Got uniq working, but still need to figure out args issue and add tests * Add some tests for uniq * fmt * remove commented out code * Add documentation and some additional tests showing uniq values and rows. Also removed args TODO * add changes that didn't get committed * whoops, I didn't save the docs correctly... * fmt * Add a test for uniq with nested json * Add another test * Fix unique-ness when json keys are out of order and make the test json more complicated
49 lines
1.1 KiB
Rust
49 lines
1.1 KiB
Rust
use crate::commands::WholeStreamCommand;
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use crate::context::CommandRegistry;
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use crate::prelude::*;
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use indexmap::set::IndexSet;
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use nu_errors::ShellError;
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use nu_protocol::{ReturnSuccess, Signature};
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#[derive(Deserialize)]
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struct UniqArgs {}
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pub struct Uniq;
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impl WholeStreamCommand for Uniq {
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fn name(&self) -> &str {
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"uniq"
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}
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fn signature(&self) -> Signature {
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Signature::build("uniq")
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}
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fn usage(&self) -> &str {
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"Return the unique rows"
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}
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fn run(
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&self,
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args: CommandArgs,
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registry: &CommandRegistry,
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) -> Result<OutputStream, ShellError> {
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args.process(registry, uniq)?.run()
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}
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}
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fn uniq(
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UniqArgs {}: UniqArgs,
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RunnableContext { input, .. }: RunnableContext,
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) -> Result<OutputStream, ShellError> {
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let stream = async_stream! {
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let uniq_values: IndexSet<_> = input.values.collect().await;
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for item in uniq_values.iter().map(|row| ReturnSuccess::value(row.clone())) {
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yield item;
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}
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};
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Ok(stream.to_output_stream())
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}
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