From 67e4c3b560cd0749be1b101be8b5157f5b1e1184 Mon Sep 17 00:00:00 2001
From: Carlos Scheidegger <carlos.scheidegger@rstudio.com>
Date: Tue, 15 Apr 2025 15:23:31 -0400
Subject: [PATCH] website - improve warning when alias redirection would
 overwrite file

---
 src/project/types/website/website-aliases.ts | 15 +++++++++++----
 1 file changed, 11 insertions(+), 4 deletions(-)

diff --git a/src/project/types/website/website-aliases.ts b/src/project/types/website/website-aliases.ts
index 9a6b9565353..6ea92b1dc22 100644
--- a/src/project/types/website/website-aliases.ts
+++ b/src/project/types/website/website-aliases.ts
@@ -106,10 +106,17 @@ export async function updateAliases(
 
     // Write the redirect file
     if (allOutputFiles.find((outputFile) => outputFile === targetFile)) {
-      // Do not, this is the same name as an output file!
-      warning(
-        `Aliases that you have created would overwrite the output file ${targetFile}. The aliases file was not created.`,
-      );
+      for (
+        const offendingAlias of targetHrefs.filter(
+          (targetHref) =>
+            targetHref.href ===
+              relative(dirname(targetHref.outputFile), targetFile),
+        )
+      ) {
+        warning(
+          `Requested alias ${targetFile} -> ${offendingAlias.outputFile} would overwrite the target. Skipping.`,
+        );
+      }
     } else {
       // Write, this is a safe file
       writeMultipleRedirectPage(targetFile, redirects);