From f4799d2346e7cad56b8c638f5ecd3329446e5b12 Mon Sep 17 00:00:00 2001
From: Charlie Marsh <charlie.r.marsh@gmail.com>
Date: Tue, 19 Nov 2024 17:52:41 -0500
Subject: [PATCH] Add dedicated warning for empty stdin (#9256)
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## Summary

I ran into this in practice:

![Screenshot 2024-11-19 at 4 20
37 PM](https://github.com/user-attachments/assets/d89aa9f1-828a-492e-af5a-3434e277580e)
---
 crates/uv-requirements-txt/src/lib.rs | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/crates/uv-requirements-txt/src/lib.rs b/crates/uv-requirements-txt/src/lib.rs
index c6027a84e..41ecc1855 100644
--- a/crates/uv-requirements-txt/src/lib.rs
+++ b/crates/uv-requirements-txt/src/lib.rs
@@ -220,10 +220,14 @@ impl RequirementsTxt {
             error: err,
         })?;
         if data == Self::default() {
-            warn_user!(
-                "Requirements file {} does not contain any dependencies",
-                requirements_txt.user_display()
-            );
+            if requirements_txt == Path::new("-") {
+                warn_user!("No dependencies found in stdin");
+            } else {
+                warn_user!(
+                    "Requirements file {} does not contain any dependencies",
+                    requirements_txt.user_display()
+                );
+            }
         }
 
         Ok(data)