chore: use thiserror

Cargo.toml

@@ -20,6 +20,7 @@ serde = { version = "1.0.144", features = ["derive"] }
 chrono = { version = "0.4.22", features = ["serde"] }
 serde_derive = "1.0.144"
 serde_json = "1.0.85"
+thiserror = "1.0"
 
 [dev-dependencies]
 rstest = "0.15.0"

src/store/base.rs

@@ -6,6 +6,7 @@ use crate::model::{PacBuild, Repository};
 use crate::store::errors::StoreError;
 use crate::store::filters::{InstallState, Kind};
 
+/// Alias for store error results
 pub type StoreResult<T> = Result<T, StoreError>;
 
 /// Abstraction over the caching implementation

src/store/errors.rs

@@ -1,12 +1,25 @@
 //! Errors used by the caching system
 
+use thiserror::Error;
+
 /// Errors used by Base
-#[derive(Debug, Clone)]
+#[derive(Debug, Clone, Error)]
 pub enum StoreError {
+    #[error("repository '{0}' could not be found")]
     RepositoryNotFound(String),
+
+    #[error("pacbuild '{name:?}' could not be found in repository {repository:?}")]
     PacBuildNotFound { name: String, repository: String },
+
+    #[error("repository '{0}' already exists")]
     RepositoryConflict(String),
+
+    #[error("pacbuild '{name:?}' already exists in repository {repository:?}")]
     PacBuildConflict { name: String, repository: String },
+
+    #[error("unexpected error: {0}")]
     Unexpected(String),
+
+    #[error("multiple errors: {0:?}")]
     Aggregate(Vec<StoreError>),
 }