81 lines
2.0 KiB
Rust
81 lines
2.0 KiB
Rust
use crate::commands::WholeStreamCommand;
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use crate::data::base::reject_fields;
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use crate::prelude::*;
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use nu_errors::ShellError;
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use nu_protocol::{ReturnSuccess, Signature, SyntaxShape};
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use nu_source::Tagged;
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#[derive(Deserialize)]
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pub struct RejectArgs {
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rest: Vec<Tagged<String>>,
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}
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pub struct Reject;
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#[async_trait]
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impl WholeStreamCommand for Reject {
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fn name(&self) -> &str {
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"reject"
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}
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fn signature(&self) -> Signature {
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Signature::build("reject").rest(SyntaxShape::String, "the names of columns to remove")
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}
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fn usage(&self) -> &str {
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"Remove the given columns from the table."
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}
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async 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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reject(args, registry)
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}
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fn examples(&self) -> Vec<Example> {
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vec![Example {
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description: "Lists the files in a directory without showing the modified column",
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example: "ls | reject modified",
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result: None,
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}]
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}
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}
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fn reject(args: CommandArgs, registry: &CommandRegistry) -> Result<OutputStream, ShellError> {
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let registry = registry.clone();
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let stream = async_stream! {
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let name = args.call_info.name_tag.clone();
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let (RejectArgs { rest: fields }, mut input) = args.process(®istry).await?;
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if fields.is_empty() {
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yield Err(ShellError::labeled_error(
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"Reject requires fields",
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"needs parameter",
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name,
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));
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return;
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}
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let fields: Vec<_> = fields.iter().map(|f| f.item.clone()).collect();
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while let Some(item) = input.next().await {
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yield ReturnSuccess::value(reject_fields(&item, &fields, &item.tag));
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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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#[cfg(test)]
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mod tests {
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use super::Reject;
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#[test]
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fn examples_work_as_expected() {
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use crate::examples::test as test_examples;
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test_examples(Reject {})
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}
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}
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