Show resolution diagnostics after pip install

crates/uv/src/commands/pip_install.rs

@@ -595,6 +595,17 @@ async fn resolve(
         .dimmed()
     )?;
 
+    // Notify the user of any diagnostics.
+    for diagnostic in resolution.diagnostics() {
+        writeln!(
+            printer.stderr(),
+            "{}{} {}",
+            "warning".yellow().bold(),
+            ":".bold(),
+            diagnostic.message().bold()
+        )?;
+    }
+
     Ok(resolution)
 }
 

crates/uv/tests/pip_install.rs

@@ -661,6 +661,34 @@ fn reinstall_incomplete() -> Result<()> {
     Ok(())
 }
 
+/// Request an extra that doesn't exist on the specified package.
+#[test]
+fn missing_registry_extra() -> Result<()> {
+    let context = TestContext::new("3.12");
+
+    uv_snapshot!(context.install()
+            .arg("black[tensorboard]==23.10.1"), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+
+    ----- stderr -----
+    Resolved 6 packages in [TIME]
+    warning: The package `black==23.10.1` does not have an extra named `tensorboard`.
+    Downloaded 6 packages in [TIME]
+    Installed 6 packages in [TIME]
+     + black==23.10.1
+     + click==8.1.7
+     + mypy-extensions==1.0.0
+     + packaging==24.0
+     + pathspec==0.12.1
+     + platformdirs==4.2.0
+    "###
+    );
+
+    Ok(())
+}
+
 /// Like `pip`, we (unfortunately) allow incompatible environments.
 #[test]
 fn allow_incompatibilities() -> Result<()> {