try new copilot diff

Author: iscai-msft

eng/scripts/check-for-changed-files.js

@@ -2,15 +2,8 @@
 
 const { run } = require("./helpers.js");
 
-// Stage all current changes first (if any)
-
-run("git", ["add", "."], {
-    encoding: "utf-8",
-    stdio: [null, "pipe", "pipe"],
-});
-
-// Reset the index but keep working directory
-run("git", ["reset"], {
+// First, reset any staged changes and clean the working directory
+run("git", ["reset", "HEAD", "."], {
     encoding: "utf-8",
     stdio: [null, "pipe", "pipe"],
 });
@@ -21,27 +14,29 @@ run("git", ["add", "--renormalize", "."], {
     stdio: [null, "pipe", "pipe"],
 });
 
-const proc = run("git", ["status", "--porcelain", "."], {
+// Check for differences ignoring whitespace and line endings
+const proc = run("git", ["diff", "--ignore-space-at-eol", "--ignore-blank-lines", "--cached"], {
     encoding: "utf-8",
     stdio: [null, "pipe", "pipe"],
 });
 
-if (proc.stdout) {
-    console.log(proc.stdout);
-}
-
-if (proc.stderr) {
-    console.error(proc.stderr);
-}
-
-if (proc.stdout || proc.stderr) {
-    const diffProc = run("git", ["diff", "."], {
+if (proc.stdout && proc.stdout.toString().trim()) {
+    console.log("Detected actual content changes (ignoring line endings):");
+    console.log(proc.stdout.toString());
+    
+    // Also show the status for context
+    const statusProc = run("git", ["status", "--porcelain", "."], {
         encoding: "utf-8",
         stdio: [null, "pipe", "pipe"],
     });
 
-    if (diffProc.stdout) {
-        console.error(diffProc.stdout);
+    if (statusProc.stdout) {
+        console.log("Git status:");
+        console.log(statusProc.stdout);
     }
+    
+    console.error(
+        `ERROR: There are actual content diffs in regeneration (excluding line ending changes). Please run 'inv regenerate' and re-run. You may also have to remove 'node_modules' and re-run 'npm install' to get the latest testserver.`,
+    );
     process.exit(1);
 }