From 31136d8409f42cc16e02761b84faf3497d546bdd Mon Sep 17 00:00:00 2001
From: SukkaW <isukkaw@gmail.com>
Date: Fri, 20 Sep 2024 16:19:35 +0800
Subject: [PATCH] Fix: write file properly

---
 Build/lib/create-file.test.ts |  6 ++++++
 Build/lib/create-file.ts      | 15 +++++++++++----
 2 files changed, 17 insertions(+), 4 deletions(-)

diff --git a/Build/lib/create-file.test.ts b/Build/lib/create-file.test.ts
index 2c436868..5df73964 100644
--- a/Build/lib/create-file.test.ts
+++ b/Build/lib/create-file.test.ts
@@ -50,4 +50,10 @@ describe('fileEqual', () => {
     ['A', 'B'],
     false
   ));
+
+  it('eol', () => test(
+    ['A', 'B'],
+    ['A', 'B', ''],
+    true
+  ));
 });
diff --git a/Build/lib/create-file.ts b/Build/lib/create-file.ts
index e6aec276..9d557d61 100644
--- a/Build/lib/create-file.ts
+++ b/Build/lib/create-file.ts
@@ -17,16 +17,21 @@ export const fileEqual = async (linesA: string[], source: AsyncIterable<string>)
     return false;
   }
 
-  let index = 0;
+  let index = -1;
   for await (const lineB of source) {
-    const lineA = linesA[index] as string | undefined;
     index++;
 
-    if (lineA == null) {
+    if (index > linesA.length - 1) {
+      if (index === linesA.length && lineB === '') {
+        index--;
+        continue;
+      }
       // The file becomes smaller
       return false;
     }
 
+    const lineA = linesA[index];
+
     if (lineA[0] === '#' && lineB[0] === '#') {
       continue;
     }
@@ -46,7 +51,7 @@ export const fileEqual = async (linesA: string[], source: AsyncIterable<string>)
     }
   }
 
-  if (index !== linesA.length) {
+  if (index !== linesA.length - 1) {
     // The file becomes larger
     return false;
   }
@@ -84,7 +89,9 @@ export async function compareAndWriteFile(span: Span, linesA: string[], filePath
       // eslint-disable-next-line no-await-in-loop -- stream high water mark
       if (p) await p;
     }
+
     await asyncWriteToStream(writeStream, '\n');
+
     writeStream.end();
   });
 }