69 lines
1.8 KiB
Rust
69 lines
1.8 KiB
Rust
use crate::prelude::*;
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use nu_data::base::reject_fields;
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use nu_engine::WholeStreamCommand;
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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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pub struct Reject;
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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. If you want to remove rows, try 'drop'."
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}
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fn run_with_actions(&self, args: CommandArgs) -> Result<ActionStream, ShellError> {
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reject(args)
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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) -> Result<ActionStream, ShellError> {
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let name = args.call_info.name_tag.clone();
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let args = args.evaluate_once()?;
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let fields: Vec<Tagged<String>> = args.rest(0)?;
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if fields.is_empty() {
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return 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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}
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let fields: Vec<_> = fields.iter().map(|f| f.item.clone()).collect();
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Ok(args
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.input
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.map(move |item| ReturnSuccess::value(reject_fields(&item, &fields, &item.tag)))
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.to_action_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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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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test_examples(Reject {})
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}
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}
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