make LESSOPEN support opt-in

src/bin/bat/app.rs

@@ -282,7 +282,7 @@ impl App {
                 .unwrap_or_default(),
             use_custom_assets: !self.matches.get_flag("no-custom-assets"),
             #[cfg(feature = "lessopen")]
-            use_lessopen: !self.matches.get_flag("no-lessopen"),
+            use_lessopen: self.matches.get_flag("lessopen"),
         })
     }
 

src/bin/bat/clap_app.rs

@@ -501,13 +501,21 @@ pub fn build_app(interactive_output: bool) -> Command {
 
     #[cfg(feature = "lessopen")]
     {
-        app = app.arg(
-            Arg::new("no-lessopen")
-                .long("no-lessopen")
-                .action(ArgAction::SetTrue)
-                .hide(true)
-                .help("Do not use the $LESSOPEN preprocessor"),
-        )
+        app = app
+            .arg(
+                Arg::new("lessopen")
+                    .long("lessopen")
+                    .action(ArgAction::SetTrue)
+                    .help("Enable the $LESSOPEN preprocessor"),
+            )
+            .arg(
+                Arg::new("no-lessopen")
+                    .long("no-lessopen")
+                    .action(ArgAction::SetTrue)
+                    .overrides_with("lessopen")
+                    .hide(true)
+                    .help("Disable the $LESSOPEN preprocessor if enabled (overrides --lessopen)"),
+            )
     }
 
     app = app