Echo Writes Code

errors.rs

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use axum::http::{ StatusCode };
use axum::response::{ IntoResponse, Response };

use std::io;
use std::fmt;
use std::num;
use std::path::{ PathBuf };
use std::string;

pub type Result<T> = ::std::result::Result<T, Error>;

#[derive(Debug)]
pub enum Error {
	CannotDetermineRepositoryName(PathBuf),
	ErrorFromConfigCrate(config::ConfigError),
	ErrorFromGit2Crate(git2::Error),
	ErrorFromTeraCrate(tera::Error),
	IoError(io::Error),
	InvalidGitRoot(io::Error),
	InvalidPort(num::TryFromIntError),
	NonUtf8Blob(string::FromUtf8Error),
	RepositoryNotFound(String),
	UnexpectedObjectType(git2::ObjectType),
	UnnamedTreeEntry(git2::Oid),
	UntypedTreeEntry(git2::Oid),
}

impl fmt::Display for Error {
	fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
		use Error::*;

		match *self {
			CannotDetermineRepositoryName(ref path) => write!(f, "Cannot determine repository name for {}", path.display()),
			ErrorFromConfigCrate(ref e) => write!(f, "Error from the config crate: {}", e),
			ErrorFromGit2Crate(ref e) => write!(f, "Error from the git2 crate: {}", e),
			ErrorFromTeraCrate(ref e) => write!(f, "Error from the tera crate: {}", e),
			IoError(ref e) => write!(f, "IO error: {}", e),
			InvalidGitRoot(ref e) => write!(f, "Invalid git.root: {}", e),
			InvalidPort(ref e) => write!(f, "Invalid network.port: {}", e),
			NonUtf8Blob(ref e) => write!(f, "Non-UTF8 blob: {}", e),
			RepositoryNotFound(ref name) => write!(f, "Repository not found: {}", name),
			UnexpectedObjectType(ref t) => write!(f, "Unexpected object type: {}", t),
			UnnamedTreeEntry(ref oid) => write!(f, "Unnamed tree entry: {}", oid),
			UntypedTreeEntry(ref oid) => write!(f, "Untyped tree entry: {}", oid),
		}
	}
}

impl From<config::ConfigError> for Error {
	fn from(e: config::ConfigError) -> Error {
		Error::ErrorFromConfigCrate(e)
	}
}

impl From<git2::Error> for Error {
	fn from(e: git2::Error) -> Error {
		Error::ErrorFromGit2Crate(e)
	}
}

impl From<tera::Error> for Error {
	fn from(e: tera::Error) -> Error {
		Error::ErrorFromTeraCrate(e)
	}
}

impl From<io::Error> for Error {
	fn from(e: io::Error) -> Error {
		Error::IoError(e)
	}
}

impl From<string::FromUtf8Error> for Error {
	fn from(e: string::FromUtf8Error) -> Error {
		Error::NonUtf8Blob(e)
	}
}

impl IntoResponse for Error {
	fn into_response(self) -> Response {
		use Error::*;

		tracing::error!("{}", &self);

		let body = match self {
			CannotDetermineRepositoryName(..) => "The server encountered an unexpected error",
			ErrorFromConfigCrate(..) => "The server encountered an unexpected error",
			ErrorFromGit2Crate(..) => "The server encountered an unexpected error",
			ErrorFromTeraCrate(..) => "The server encountered an unexpected error",
			IoError(..) => "The server encountered an unexpected error",
			InvalidGitRoot(..) => "The server encountered an unexpected error",
			InvalidPort(..) => "The server encountered an unexpected error",
			NonUtf8Blob(..) => "The server encountered an unexpected error",
			RepositoryNotFound(..) => "Repository not found",
			UnexpectedObjectType(..) => "The server encountered an unexpected error",
			UnnamedTreeEntry(..) => "The server encountered an unexpected error",
			UntypedTreeEntry(..) => "The server encountered an unexpected error",
		};

		(StatusCode::INTERNAL_SERVER_ERROR, body).into_response()
	}
}