nushell/crates/nu-cli/src/errors.rs

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use miette::{LabeledSpan, MietteHandler, ReportHandler, Severity, SourceCode};
use nu_protocol::engine::StateWorkingSet;
use thiserror::Error;
/// This error exists so that we can defer SourceCode handling. It simply
/// forwards most methods, except for `.source_code()`, which we provide.
#[derive(Error)]
#[error("{0}")]
pub struct CliError<'src>(
pub &'src (dyn miette::Diagnostic + Send + Sync + 'static),
pub &'src StateWorkingSet<'src>,
);
impl std::fmt::Debug for CliError<'_> {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
MietteHandler::default().debug(self, f)?;
Ok(())
}
}
impl<'src> miette::Diagnostic for CliError<'src> {
fn code<'a>(&'a self) -> Option<Box<dyn std::fmt::Display + 'a>> {
self.0.code()
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}
fn severity(&self) -> Option<Severity> {
self.0.severity()
}
fn help<'a>(&'a self) -> Option<Box<dyn std::fmt::Display + 'a>> {
self.0.help()
}
fn url<'a>(&'a self) -> Option<Box<dyn std::fmt::Display + 'a>> {
self.0.url()
}
fn labels<'a>(&'a self) -> Option<Box<dyn Iterator<Item = LabeledSpan> + 'a>> {
self.0.labels()
}
// Finally, we redirect the source_code method to our own source.
fn source_code(&self) -> Option<&dyn SourceCode> {
if let Some(source_code) = self.0.source_code() {
Some(source_code)
} else {
Some(&self.1)
}
}
fn related<'a>(&'a self) -> Option<Box<dyn Iterator<Item = &'a dyn miette::Diagnostic> + 'a>> {
self.0.related()
}
}