Infra: handle win32 unknown inode in file identity checks

src/infra/file-identity.test.ts

@@ -27,7 +27,17 @@ describe("sameFileIdentity", () => {
     expect(sameFileIdentity(stat(7, 11), stat(8, 11), "win32")).toBe(false);
   });
 
+  it("accepts win32 inode mismatch when either side is 0", () => {
+    expect(sameFileIdentity(stat(7, 0), stat(7, 11), "win32")).toBe(true);
+    expect(sameFileIdentity(stat(7, 12), stat(7, 0), "win32")).toBe(true);
+  });
+
+  it("keeps inode strictness on non-windows", () => {
+    expect(sameFileIdentity(stat(7, 0), stat(7, 11), "linux")).toBe(false);
+  });
+
   it("handles bigint stats", () => {
     expect(sameFileIdentity(stat(0n, 11n), stat(8n, 11n), "win32")).toBe(true);
+    expect(sameFileIdentity(stat(7n, 0n), stat(7n, 11n), "win32")).toBe(true);
   });
 });

src/infra/file-identity.ts

@@ -7,12 +7,19 @@ function isZero(value: number | bigint): boolean {
   return value === 0 || value === 0n;
 }
 
+function isUnknownIdentity(value: number | bigint): boolean {
+  return isZero(value);
+}
+
 export function sameFileIdentity(
   left: FileIdentityStat,
   right: FileIdentityStat,
   platform: NodeJS.Platform = process.platform,
 ): boolean {
-  if (left.ino !== right.ino) {
+  const inodeMatches =
+    left.ino === right.ino ||
+    (platform === "win32" && (isUnknownIdentity(left.ino) || isUnknownIdentity(right.ino)));
+  if (!inodeMatches) {
     return false;
   }
 
@@ -21,5 +28,5 @@ export function sameFileIdentity(
   if (left.dev === right.dev) {
     return true;
   }
-  return platform === "win32" && (isZero(left.dev) || isZero(right.dev));
+  return platform === "win32" && (isUnknownIdentity(left.dev) || isUnknownIdentity(right.dev));
 }