Fix preview watch target file path

Resolve "EMFILE: too many open files" error caused by watching unnecessary files.

- Change preview command to use fileSystemRepo.getRootPath() instead of config.getItemsRootDir()
- Make getRootPath() public in FileSystemRepo for external access(Please visit if this is the right approach)
- Add chokidar ignore pattern to exclude .remote directory from file watching

Author: fussy113

src/commands/preview.ts

@@ -1,4 +1,3 @@
-import { config } from "../lib/config";
 import { getFileSystemRepo } from "../lib/get-file-system-repo";
 import { getQiitaApiInstance } from "../lib/get-qiita-api-instance";
 import { getUrlAddress } from "../lib/getUrlAddress";
@@ -23,6 +22,6 @@ export const preview = async () => {
 
   startLocalChangeWatcher({
     server,
-    watchPath: config.getItemsRootDir(),
+    watchPath: fileSystemRepo.getRootPath(),
   });
 };

src/lib/file-system-repo.test.ts

@@ -401,4 +401,12 @@ updated
       });
     });
   });
+
+  describe("getRootPath()", () => {
+    it("returns the root path", () => {
+      const dataRootDir = "./tmp";
+      const instance = new FileSystemRepo({ dataRootDir });
+      expect(instance.getRootPath()).toBe(`tmp/public`);
+    });
+  });
 });

src/lib/file-system-repo.ts

@@ -187,7 +187,7 @@ export class FileSystemRepo {
     await fs.mkdir(this.getRemotePath(), { recursive: true });
   }
 
-  private getRootPath() {
+  public getRootPath() {
     const subdir = "public";
     return path.join(this.dataRootDir, subdir);
   }

src/server/app.ts

@@ -65,7 +65,9 @@ export function startLocalChangeWatcher({
   watchPath: string;
 }) {
   const wsServer = new WebSocketServer({ server });
-  const watcher = chokidar.watch(watchPath);
+  const watcher = chokidar.watch(watchPath, {
+    ignored: ["**/.remote/**"],
+  });
   watcher.on("change", () => {
     wsServer.clients.forEach((client) => {
       if (client.readyState === WebSocket.OPEN) {