main: fail gracefully when --config-file is missing or malformed

src/main.rs

@@ -119,7 +119,10 @@ fn main() {
     let config = if cli.ignore_config {
         Config::with_none()
     } else if let Some(path) = &cli.config_file {
-        Config::from_file(path).expect("Provided file path is invalid")
+        Config::from_file(path).unwrap_or_else(|| {
+            print_error!("Can not use config file {}.", path.to_string_lossy());
+            std::process::exit(ExitCode::MajorIssue as i32);
+        })
     } else {
         Config::default()
     };

tests/integration.rs

@@ -723,6 +723,37 @@ fn test_custom_config_file_parsing() {
         .stdout(predicate::str::is_match("folder\n└── file").unwrap());
 }
 
+#[test]
+fn test_missing_custom_config_file_fails_without_panic() {
+    let dir = tempdir();
+
+    cmd()
+        .arg("--config-file")
+        .arg(dir.path().join("does_not_exist.yaml"))
+        .arg(dir.path())
+        .assert()
+        .failure()
+        .stderr(predicate::str::starts_with("lsd: "))
+        .stderr(predicate::str::contains("panicked at").not());
+}
+
+#[test]
+fn test_malformed_custom_config_file_fails_without_panic() {
+    let dir = tempdir();
+    dir.child("config.yaml")
+        .write_str("display: bogus")
+        .unwrap();
+
+    cmd()
+        .arg("--config-file")
+        .arg(dir.path().join("config.yaml"))
+        .arg(dir.path())
+        .assert()
+        .failure()
+        .stderr(predicate::str::starts_with("lsd: "))
+        .stderr(predicate::str::contains("panicked at").not());
+}
+
 #[test]
 fn test_cannot_access_file_exit_status() {
     let dir = tempdir();