fix: command-not-found uses stderr

CHANGELOG.md

@@ -7,6 +7,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Fixed
+
+- Not getting `command-not-found`'s output as it goes into `stderr`
+
 ## [0.7.0] - 2025-04-05
 
 ### Breaking

core/src/shell.rs

@@ -325,6 +325,21 @@ pub fn command_output(shell: &str, command: &str) -> String {
 	String::from_utf8_lossy(&output.stdout).to_string()
 }
 
+pub fn command_output_or_error(shell: &str, command: &str) -> String {
+	let output = std::process::Command::new(shell)
+		.arg("-c")
+		.arg(command)
+		.env("LC_ALL", "C")
+		.output()
+		.expect("failed to execute process");
+
+	if !output.stdout.is_empty() {
+		String::from_utf8_lossy(&output.stdout).to_string()
+	} else {
+		String::from_utf8_lossy(&output.stderr).to_string()
+	}
+}
+
 pub fn module_output(data: &Data, module: &str) -> Option<Vec<String>> {
 	let shell = &data.shell;
 	let executable = &data.split[0];

core/src/system.rs

@@ -1,3 +1,4 @@
+use crate::shell::command_output_or_error;
 use crate::shell::{command_output, elevate, Data};
 use colored::Colorize;
 use std::io::stderr;
@@ -152,7 +153,8 @@ pub fn get_packages(
 		}
 		_ => match package_manager.ends_with("command-not-found") {
 			true => {
-				let result = command_output(shell, &format!("{} {}", package_manager, executable));
+				let result =
+					command_output_or_error(shell, &format!("{} {}", package_manager, executable));
 				if result.is_empty() {
 					return None;
 				}
@@ -167,7 +169,7 @@ pub fn get_packages(
 				None
 			}
 			false => {
-				eprintln!("{} Unsupported package manager", ":pay-respects".yellow());
+				eprintln!("{} Unsupported package manager", "pay-respects:".yellow());
 				None
 			}
 		},