perf: COS 部署改为增量同步，只上传变更文件

scripts/deploy-to-cos.js

@@ -228,7 +228,53 @@ async function clearBucket() {
 }
 
 /**
- * 上传整个 build 目录
+ * 计算文件的 MD5
+ */
+function getFileMd5(filePath) {
+    const content = fs.readFileSync(filePath);
+    return crypto.createHash('md5').update(content).digest('hex');
+}
+
+/**
+ * 获取 COS 上所有文件的 ETag（MD5）
+ */
+async function getRemoteFiles() {
+    return new Promise((resolve, reject) => {
+        const remoteFiles = {};
+        let marker = '';
+
+        const fetchBatch = () => {
+            cos.getBucket({
+                Bucket: config.COS_BUCKET,
+                Region: config.COS_REGION,
+                MaxKeys: 1000,
+                Marker: marker,
+            }, (err, data) => {
+                if (err) {
+                    reject(err);
+                    return;
+                }
+
+                data.Contents.forEach(item => {
+                    // COS 的 ETag 是 MD5，去掉引号
+                    remoteFiles[item.Key] = item.ETag.replace(/"/g, '');
+                });
+
+                if (data.IsTruncated === 'true') {
+                    marker = data.NextMarker;
+                    fetchBatch();
+                } else {
+                    resolve(remoteFiles);
+                }
+            });
+        };
+
+        fetchBatch();
+    });
+}
+
+/**
+ * 上传整个 build 目录（增量同步）
  */
 async function uploadBuildDir() {
     const buildDir = path.join(__dirname, '..', 'build');
@@ -238,8 +284,38 @@ async function uploadBuildDir() {
         process.exit(1);
     }
 
-    const files = getAllFiles(buildDir);
-    console.log(`\n\x1b[36m[上传]\x1b[0m 共 ${files.length} 个文件待上传...\n`);
+    // 获取本地文件列表
+    const localFiles = getAllFiles(buildDir);
+    console.log(`\n\x1b[36m[扫描]\x1b[0m 本地共 ${localFiles.length} 个文件`);
+
+    // 获取远程文件列表
+    console.log('\x1b[36m[同步]\x1b[0m 获取 COS 文件列表...');
+    let remoteFiles = {};
+    try {
+        remoteFiles = await getRemoteFiles();
+        console.log(`    COS 上共 ${Object.keys(remoteFiles).length} 个文件`);
+    } catch (err) {
+        console.log(`\x1b[33m[警告]\x1b[0m 获取远程文件列表失败，将全量上传: ${err.message}`);
+    }
+
+    // 比对找出需要上传的文件
+    const filesToUpload = [];
+    for (const filePath of localFiles) {
+        const relativePath = path.relative(buildDir, filePath).replace(/\\/g, '/');
+        const localMd5 = getFileMd5(filePath);
+        const remoteMd5 = remoteFiles[relativePath];
+
+        if (localMd5 !== remoteMd5) {
+            filesToUpload.push({ filePath, relativePath });
+        }
+    }
+
+    console.log(`\x1b[36m[上传]\x1b[0m 需要上传 ${filesToUpload.length} 个文件（跳过 ${localFiles.length - filesToUpload.length} 个未变更）\n`);
+
+    if (filesToUpload.length === 0) {
+        console.log('\x1b[32m[✓]\x1b[0m 所有文件已是最新，无需上传');
+        return { uploaded: 0, failed: 0, skipped: localFiles.length };
+    }
 
     let uploaded = 0;
     let failed = 0;
@@ -248,21 +324,19 @@ async function uploadBuildDir() {
     // 并发上传（限制并发数）
     const concurrency = 10;
     const chunks = [];
-    for (let i = 0; i < files.length; i += concurrency) {
-        chunks.push(files.slice(i, i + concurrency));
+    for (let i = 0; i < filesToUpload.length; i += concurrency) {
+        chunks.push(filesToUpload.slice(i, i + concurrency));
     }
 
     for (const chunk of chunks) {
-        await Promise.all(chunk.map(async (filePath) => {
-            const relativePath = path.relative(buildDir, filePath).replace(/\\/g, '/');
-
+        await Promise.all(chunk.map(async ({ filePath, relativePath }) => {
             try {
                 await uploadFile(filePath, relativePath);
                 uploaded++;
 
                 // 进度显示
-                const progress = Math.round((uploaded + failed) / files.length * 100);
-                process.stdout.write(`\r    进度: ${progress}% (${uploaded}/${files.length})`);
+                const progress = Math.round((uploaded + failed) / filesToUpload.length * 100);
+                process.stdout.write(`\r    进度: ${progress}% (${uploaded}/${filesToUpload.length})`);
             } catch (err) {
                 failed++;
                 errors.push({ file: relativePath, error: err.message });
@@ -279,9 +353,9 @@ async function uploadBuildDir() {
         });
     }
 
-    console.log(`\x1b[32m[✓]\x1b[0m 上传完成: 成功 ${uploaded}，失败 ${failed}`);
+    console.log(`\x1b[32m[✓]\x1b[0m 上传完成: 成功 ${uploaded}，跳过 ${localFiles.length - filesToUpload.length}，失败 ${failed}`);
 
-    return { uploaded, failed };
+    return { uploaded, failed, skipped: localFiles.length - filesToUpload.length };
 }
 
 // ============================================================================