🐛 fix: 0.7.1: Don't crash when which fails at binary comparison

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "boxxy"
-version = "0.7.0"
+version = "0.7.1"
 edition = "2021"
 repository = "https://github.com/queer/boxxy"
 

src/enclosure/rule.rs

@@ -160,10 +160,18 @@ impl Rule {
         }
 
         // Resolve both program and rule_binary with `which` and compare. ex. /usr/bin/ls == /usr/bin/ls
-        let which_rule_binary = which::which(rule_binary)?;
-        let which_user_program = which::which(program)?;
+        let which_rule_binary = match which::which(rule_binary) {
+            Ok(which_rule_binary) => Some(which_rule_binary),
+            Err(_) => None,
+        };
+        let which_user_program = match which::which(program) {
+            Ok(which_user_program) => Some(which_user_program),
+            Err(_) => None,
+        };
         debug!("{}: comparing binaries with which(1): which_user_program={which_user_program:?}, which_rule_binary={which_rule_binary:?}", self.name);
-        if which_rule_binary == which_user_program {
+        if which_rule_binary == which_user_program
+            && (which_rule_binary.is_some() || which_user_program.is_some())
+        {
             return Ok(true);
         }