nushell/crates/nu-cli/src/commands/cd.rs

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use crate::commands::WholeStreamCommand;
use crate::prelude::*;
use std::path::PathBuf;
use nu_errors::ShellError;
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use nu_protocol::{Signature, SyntaxShape};
use nu_source::Tagged;
#[derive(Deserialize)]
pub struct CdArgs {
pub(crate) path: Option<Tagged<PathBuf>>,
}
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pub struct Cd;
impl WholeStreamCommand for Cd {
fn name(&self) -> &str {
"cd"
}
fn signature(&self) -> Signature {
Signature::build("cd").optional(
"directory",
SyntaxShape::Path,
"the directory to change to",
)
}
fn usage(&self) -> &str {
"Change to a new path."
}
fn run(
&self,
args: CommandArgs,
registry: &CommandRegistry,
) -> Result<OutputStream, ShellError> {
cd(args, registry)
}
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fn examples(&self) -> &[Example] {
&[
Example {
description: "Change to a new directory called 'dirname'",
example: "cd dirname",
},
Example {
description: "Change to your home directory",
example: "cd",
},
Example {
description: "Change to your home directory (alternate version)",
example: "cd ~",
},
Example {
description: "Change to the previous directory",
example: "cd -",
},
]
}
}
fn cd(args: CommandArgs, registry: &CommandRegistry) -> Result<OutputStream, ShellError> {
let registry = registry.clone();
let stream = async_stream! {
let name = args.call_info.name_tag.clone();
let shell_manager = args.shell_manager.clone();
let (args, _): (CdArgs, _) = args.process(&registry).await?;
let mut result = shell_manager.cd(args, name)?;
while let Some(item) = result.next().await {
yield item;
}
};
Ok(stream.to_output_stream())
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}