2 files changed, 64 insertions, 3 deletions
diff --git a/pkgs/by-name/ba/back/src/error/mod.rs b/pkgs/by-name/ba/back/src/error/mod.rs
index 7e1c9cf..8b71700 100644
--- a/pkgs/by-name/ba/back/src/error/mod.rs
+++ b/pkgs/by-name/ba/back/src/error/mod.rs
@@ -1,9 +1,24 @@
+// Back - An extremely simple git issue tracking system. Inspired by tvix's
+// panettone
+//
+// Copyright (C) 2024 Benedikt Peetz <benedikt.peetz@b-peetz.de>
+// SPDX-License-Identifier: AGPL-3.0-or-later
+//
+// This file is part of Back.
+//
+// You should have received a copy of the License along with this program.
+// If not, see <https://www.gnu.org/licenses/agpl.txt>.
+
 use std::{fmt::Display, io, path::PathBuf};
 
 use thiserror::Error;
 
+use crate::web::prefix::BackPrefix;
+
 pub type Result<T> = std::result::Result<T, Error>;
 
+pub mod responder;
+
 #[derive(Error, Debug)]
 pub enum Error {
     ConfigParse {
@@ -14,11 +29,19 @@ pub enum Error {
         file: PathBuf,
         error: io::Error,
     },
+    RocketLaunch(#[from] rocket::Error),
+
     RepoOpen {
         repository_path: PathBuf,
         error: Box<gix::open::Error>,
     },
-    RocketLaunch(#[from] rocket::Error),
+    RepoRefsIter(#[from] gix::refs::packed::buffer::open::Error),
+    RepoRefsPrefixed(#[from] std::io::Error),
+
+    IssuesPrefixMissing {
+        prefix: BackPrefix,
+    },
+    IssuesPrefixParse(#[from] gix::hash::prefix::from_hex::Error),
 }
 
 impl Display for Error {
@@ -38,6 +61,9 @@ impl Display for Error {
                     file.display()
                 )
             }
+            Error::RocketLaunch(error) => {
+                write!(f, "while trying to start back: {error}")
+            }
             Error::RepoOpen {
                 repository_path,
                 error,
@@ -48,8 +74,20 @@ impl Display for Error {
                     repository_path.display()
                 )
             }
-            Error::RocketLaunch(error) => {
-                write!(f, "while trying to start back: {error}")
+            Error::RepoRefsIter(error) => {
+                write!(f, "while iteration over the refs in a repository: {error}",)
+            }
+            Error::RepoRefsPrefixed(error) => {
+                write!(f, "while prefixing the refs with a path: {error}")
+            }
+            Error::IssuesPrefixMissing { prefix } => {
+                write!(
+                    f,
+                    "There is no 'issue' associated with the prefix: {prefix}"
+                )
+            }
+            Error::IssuesPrefixParse(error) => {
+                write!(f, "The given prefix can not be parsed as prefix: {error}")
             }
         }
     }
diff --git a/pkgs/by-name/ba/back/src/error/responder.rs b/pkgs/by-name/ba/back/src/error/responder.rs
new file mode 100644
index 0000000..7bea961
--- /dev/null
+++ b/pkgs/by-name/ba/back/src/error/responder.rs
@@ -0,0 +1,23 @@
+// Back - An extremely simple git issue tracking system. Inspired by tvix's
+// panettone
+//
+// Copyright (C) 2024 Benedikt Peetz <benedikt.peetz@b-peetz.de>
+// SPDX-License-Identifier: AGPL-3.0-or-later
+//
+// This file is part of Back.
+//
+// You should have received a copy of the License along with this program.
+// If not, see <https://www.gnu.org/licenses/agpl.txt>.
+
+use rocket::{
+    response::{self, Responder, Response},
+    Request,
+};
+
+use super::Error;
+
+impl<'r> Responder<'r, 'static> for Error {
+    fn respond_to(self, req: &'r Request<'_>) -> response::Result<'static> {
+        Response::build_from(self.to_string().respond_to(req)?).ok()
+    }
+}