nushell/crates/nu-cli/src/commands/touch.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, SyntaxShape};
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use nu_source::Tagged;
use std::fs::OpenOptions;
use std::path::PathBuf;
pub struct Touch;
#[derive(Deserialize)]
pub struct TouchArgs {
pub target: Tagged<PathBuf>,
}
impl WholeStreamCommand for Touch {
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fn name(&self) -> &str {
"touch"
}
fn signature(&self) -> Signature {
Signature::build("touch").required(
"filename",
SyntaxShape::Path,
"the path of the file you want to create",
)
}
fn usage(&self) -> &str {
"creates a file"
}
fn run(
&self,
args: CommandArgs,
registry: &CommandRegistry,
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) -> Result<OutputStream, ShellError> {
touch(args, registry)
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}
fn examples(&self) -> &[Example] {
&[Example {
description: "Creates \"fixture.json\"",
example: "touch fixture.json",
}]
}
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}
fn touch(args: CommandArgs, registry: &CommandRegistry) -> Result<OutputStream, ShellError> {
let registry = registry.clone();
let stream = async_stream! {
let (TouchArgs { target }, _) = args.process(&registry).await?;
match OpenOptions::new().write(true).create(true).open(&target) {
Ok(_) => {},
Err(err) => yield Err(ShellError::labeled_error(
"File Error",
err.to_string(),
&target.tag,
)),
}
};
Ok(stream.to_output_stream())
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}