From b0279716c4d678539c0ef5d45800f79cf7a0a1ed Mon Sep 17 00:00:00 2001
From: Jakob Hellermann <jakob.hellermann@protonmail.com>
Date: Sat, 18 Jan 2025 16:25:51 +0100
Subject: [PATCH] fix: panic on unexpected nix-index output (github #31)

---
 core/src/system.rs | 19 +++++++++++--------
 1 file changed, 11 insertions(+), 8 deletions(-)

diff --git a/core/src/system.rs b/core/src/system.rs
index 0a506f0..dabab16 100644
--- a/core/src/system.rs
+++ b/core/src/system.rs
@@ -112,18 +112,21 @@ pub fn get_packages(
 			if result.is_empty() {
 				return None;
 			}
-			let packages: Vec<String> = result
+			let packages: Option<Vec<String>> = result
 				.lines()
 				.map(|line| {
-					line.split_whitespace()
-						.next()
-						.unwrap()
-						.rsplit_once('.')
-						.unwrap()
-						.0
-						.to_string()
+					let package = line.split_whitespace().next()?;
+					Some(package.rsplit_once('.')?.0.to_string())
 				})
 				.collect();
+			let Some(packages) = packages else {
+				eprintln!(
+					"Unexpected output from nix-index:\n  {}",
+					result.replace("\n", "\n  ")
+				);
+				return None;
+			};
+
 			if packages.is_empty() {
 				None
 			} else {