nu-command 0.29.0

CLI for nushell
Documentation 
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use crate::prelude::*;
use nu_engine::CommandArgs;
use nu_engine::WholeStreamCommand;
use nu_errors::ShellError;
use nu_protocol::{Primitive, ReturnSuccess, Signature, UntaggedValue, Value};
use nu_stream::OutputStream;

pub struct Command;

#[async_trait]
impl WholeStreamCommand for Command {
    fn name(&self) -> &str {
        "config"
    }

    fn signature(&self) -> Signature {
        Signature::build("config")
    }

    fn usage(&self) -> &str {
        "Configuration management."
    }

    async fn run(&self, args: CommandArgs) -> Result<OutputStream, ShellError> {
        let name = args.call_info.name_tag.clone();

        let path = match args.scope.get_var("config-path") {
            Some(Value {
                value: UntaggedValue::Primitive(Primitive::FilePath(path)),
                ..
            }) => Some(path),
            _ => nu_data::config::default_path().ok(),
        };
        let result = nu_data::config::read(&name, &path)?;

        Ok(futures::stream::iter(vec![ReturnSuccess::value(
            UntaggedValue::Row(result.into()).into_value(name),
        )])
        .to_output_stream())
    }
}