add --dont-fetch

src/main.rs

@@ -18,6 +18,8 @@ struct Args {
     /// Only prefetch the listed depot(s)
     #[clap(long)]
     depot: Vec<u32>,
+    #[clap(long)]
+    dont_fetch: bool,
 }
 
 #[tokio::main]
@@ -37,20 +39,26 @@ async fn main() -> MainResult {
             manifest: manifest.gid,
         });
 
-    let outputs = manifests.map(|input| {
-        prefetch(&input).map(|hash| ManifestOutput {
-            app_id: input.app_id,
-            depot_id: input.depot_id,
-            manifest: input.manifest,
-            hash,
-        })
-    }).collect::<Result<Vec<_>, _>>()?;
+    if args.dont_fetch {
+        let inputs = manifests.collect::<Vec<_>>();
+        serde_json::to_writer_pretty(std::io::stdout(), &inputs)?;
+    } else {
+        let outputs = manifests.map(|input| {
+            prefetch(&input).map(|hash| ManifestOutput {
+                app_id: input.app_id,
+                depot_id: input.depot_id,
+                manifest: input.manifest,
+                hash,
+            })
+        }).collect::<Result<Vec<_>, _>>()?;
 
-    serde_json::to_writer_pretty(std::io::stdout(), &outputs)?;
+        serde_json::to_writer_pretty(std::io::stdout(), &outputs)?;
+    }
 
     Ok(())
 }
 
+#[derive(Debug, Serialize)]
 struct ManifestInput {
     app_id: u32,
     depot_id: u32,