nushell/src/commands/view.rs

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Rust
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use crate::errors::ShellError;
use crate::prelude::*;
use prettyprint::PrettyPrinter;
pub fn view(args: CommandArgs) -> Result<OutputStream, ShellError> {
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if args.positional.len() == 0 {
if let Some(span) = args.name_span {
return Err(ShellError::labeled_error(
"View requires a filename",
"needs parameter",
span,
));
} else {
return Err(ShellError::string("view requires a filename."));
}
}
let target = match args.positional[0].as_string() {
Ok(s) => s.clone(),
Err(e) => {
if let Some(span) = args.name_span {
return Err(ShellError::labeled_error(
"Expected a string",
"not a filename",
span,
));
} else {
return Err(e);
}
}
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};
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let cwd = args.env.lock().unwrap().cwd().to_path_buf();
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let printer = PrettyPrinter::default()
.line_numbers(false)
.header(false)
.grid(false)
.build()
.map_err(|e| ShellError::string(e))?;
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let file = cwd.join(target);
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let _ = printer.file(file.display().to_string());
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Ok(VecDeque::new().boxed())
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}