add more automatic error handling

2 files changed, 15 insertions, 0 deletions

diff --git a/src/error/error_kind.rs b/src/error/error_kind.rs
index b5aa835..679ad32 100644
--- a/src/error/error_kind.rs
+++ b/src/error/error_kind.rs
@@ -31,3 +31,9 @@ impl std::convert::From<&globset::ErrorKind> for JoshutoErrorKind {
         Self::Glob
     }
 }
+
+impl std::convert::From<std::env::VarError> for JoshutoErrorKind {
+    fn from(_: std::env::VarError) -> Self {
+        Self::EnvVarNotPresent
+    }
+}
diff --git a/src/error/error_type.rs b/src/error/error_type.rs
index 80dc4bc..9ca849a 100644
--- a/src/error/error_type.rs
+++ b/src/error/error_type.rs
@@ -42,6 +42,15 @@ impl std::convert::From<globset::Error> for JoshutoError {
     }
 }
 
+impl std::convert::From<std::env::VarError> for JoshutoError {
+    fn from(err: std::env::VarError) -> Self {
+        Self {
+            _kind: JoshutoErrorKind::from(err),
+            _cause: "Environment variable not found".to_string(),
+        }
+    }
+}
+
 impl std::convert::From<trash::Error> for JoshutoError {
     fn from(err: trash::Error) -> Self {
         let err = match err {