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use std::fmt::Display;
use thiserror::Error;
#[derive(Error, Debug)]
pub enum VfsError {
#[error("IO error: {0}")]
IoError(#[from] std::io::Error),
#[error("The file or directory `{path}` could not be found")]
FileNotFound {
path: String,
},
#[error("The path `{path}` is invalid")]
InvalidPath {
path: String,
},
#[error("FileSystem error: {message}")]
Other {
message: String,
},
#[error("{context}, cause: {cause}")]
WithContext {
context: String,
#[source]
cause: Box<VfsError>,
},
#[error("Functionality not supported by this filesystem")]
NotSupported,
}
impl From<String> for VfsError {
fn from(message: String) -> Self {
VfsError::Other { message }
}
}
pub type VfsResult<T> = std::result::Result<T, VfsError>;
pub(crate) trait VfsResultExt<T> {
fn with_context<C, F>(self, f: F) -> VfsResult<T>
where
C: Display + Send + Sync + 'static,
F: FnOnce() -> C;
}
impl<T> VfsResultExt<T> for VfsResult<T> {
fn with_context<C, F>(self, context: F) -> VfsResult<T>
where
C: Display + Send + Sync + 'static,
F: FnOnce() -> C,
{
self.map_err(|error| VfsError::WithContext {
context: context().to_string(),
cause: Box::new(error),
})
}
}