nu-cli 0.115.0

CLI-related functionality for Nushell
Documentation 
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use nu_parser::parse;
use nu_protocol::{
    ParseError,
    engine::{EngineState, StateWorkingSet},
};
use reedline::{ValidationResult, Validator};
use std::sync::Arc;

pub struct NuValidator {
    pub engine_state: Arc<EngineState>,
}

impl Validator for NuValidator {
    fn validate(&self, line: &str) -> ValidationResult {
        let mut working_set = StateWorkingSet::new(&self.engine_state);
        parse(&mut working_set, None, line.as_bytes(), false);

        // Unclosed delimiters and unexpected EOF both mean the user may still be
        // typing a multi-line construct (e.g. an open `{` in the REPL).
        // Unbalanced closers are complete but wrong inputs — keep them Complete
        // so the REPL submits the line and shows the diagnostic.
        if matches!(
            working_set.parse_errors.first(),
            Some(ParseError::UnexpectedEof(..) | ParseError::Unclosed(..))
        ) {
            ValidationResult::Incomplete
        } else {
            ValidationResult::Complete
        }
    }
}