nushell/crates/nu-cli/src/commands/shells.rs
2020-05-29 20:22:52 +12:00

64 lines
1.5 KiB
Rust

use crate::commands::WholeStreamCommand;
use crate::prelude::*;
use nu_errors::ShellError;
use nu_protocol::{Signature, TaggedDictBuilder};
use std::sync::atomic::Ordering;
pub struct Shells;
#[async_trait]
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."
}
async fn run(
&self,
args: CommandArgs,
registry: &CommandRegistry,
) -> Result<OutputStream, ShellError> {
shells(args, registry)
}
}
fn shells(args: CommandArgs, _registry: &CommandRegistry) -> Result<OutputStream, ShellError> {
let mut shells_out = VecDeque::new();
let tag = args.call_info.name_tag;
for (index, shell) in args.shell_manager.shells.lock().iter().enumerate() {
let mut dict = TaggedDictBuilder::new(&tag);
if index == (*args.shell_manager.current_shell).load(Ordering::SeqCst) {
dict.insert_untagged("active", "X".to_string());
} else {
dict.insert_untagged("active", " ".to_string());
}
dict.insert_untagged("name", shell.name());
dict.insert_untagged("path", shell.path());
shells_out.push_back(dict.into_value());
}
Ok(shells_out.into())
}
#[cfg(test)]
mod tests {
use super::Shells;
#[test]
fn examples_work_as_expected() {
use crate::examples::test as test_examples;
test_examples(Shells {})
}
}