nushell/src/commands/shells.rs

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Rust
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use crate::commands::WholeStreamCommand;
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use crate::prelude::*;
use nu_errors::ShellError;
use nu_protocol::{Signature, TaggedDictBuilder};
use std::sync::atomic::Ordering;
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pub struct Shells;
impl WholeStreamCommand for Shells {
fn name(&self) -> &str {
"shells"
}
fn signature(&self) -> Signature {
Signature::build("shells")
}
fn usage(&self) -> &str {
"Display the list of current shells."
}
fn run(
&self,
args: CommandArgs,
registry: &CommandRegistry,
) -> Result<OutputStream, ShellError> {
shells(args, registry)
}
}
fn shells(args: CommandArgs, _registry: &CommandRegistry) -> Result<OutputStream, ShellError> {
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let mut shells_out = VecDeque::new();
let tag = args.call_info.name_tag;
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for (index, shell) in args.shell_manager.shells.lock().unwrap().iter().enumerate() {
let mut dict = TaggedDictBuilder::new(&tag);
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if index == (*args.shell_manager.current_shell).load(Ordering::SeqCst) {
dict.insert_untagged(" ", "X".to_string());
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} else {
dict.insert_untagged(" ", " ".to_string());
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}
dict.insert_untagged("name", shell.name());
dict.insert_untagged("path", shell.path());
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shells_out.push_back(dict.into_value());
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}
Ok(shells_out.to_output_stream())
}