search.rs: include platforms in search results

To avoid a breaking change that people might not like, introducing a
`platforms` flag to gate search change.

Author: khaneliman

src/interface.rs

@@ -180,6 +180,10 @@ pub struct SearchArgs {
     /// Name of the channel to query (e.g nixos-23.11, nixos-unstable, etc)
     pub channel: String,
 
+    #[arg(long, short = 'P')]
+    /// Show supported platforms for each package
+    pub platforms: bool,
+
     /// Name of the package to search
     pub query: Vec<String>,
 }

src/search.rs

@@ -177,7 +177,7 @@ impl SearchArgs {
                 }
             }
 
-            if !elem.package_platforms.is_empty() {
+            if self.platforms && !elem.package_platforms.is_empty() {
                 println!("  Platforms: {}", elem.package_platforms.join(", "));
             }