feat: 🎸 add copyFileSync() method

demo/fsa/main.ts

@@ -37,6 +37,10 @@ const demo = async (dir: fsa.IFileSystemDirectoryHandle) => {
   console.log('appendFileSync() - can append to an existing file');
   fs.appendFileSync('/cool.txt', '!');
   strictEqual(fs.readFileSync('/cool.txt', 'utf8'), 'worlds!');
+
+  console.log('copyFileSync() - can copy a file');
+  fs.copyFileSync('/cool.txt', '/cool (Copy).txt');
+  strictEqual(fs.readFileSync('/cool (Copy).txt', 'utf8'), 'worlds!');
 };
 
 const main = async () => {

src/fsa-to-node/FsaNodeFs.ts

@@ -843,7 +843,13 @@ export class FsaNodeFs extends FsaNodeCore implements FsCallbackApi, FsSynchrono
     }
   };
 
-  public readonly copyFileSync: FsSynchronousApi['copyFileSync'] = notSupported;
+  public readonly copyFileSync: FsSynchronousApi['copyFileSync'] = (src: misc.PathLike, dest: misc.PathLike, flags?: misc.TFlagsCopy): void => {
+    const srcFilename = pathToFilename(src);
+    const destFilename = pathToFilename(dest);
+    const adapter = this.getSyncAdapter();
+    adapter.call('copy', {src: srcFilename, dst: destFilename, flags});
+  };
+
   public readonly ftruncateSync: FsSynchronousApi['ftruncateSync'] = notSupported;
   public readonly linkSync: FsSynchronousApi['linkSync'] = notSupported;
   public readonly mkdirSync: FsSynchronousApi['mkdirSync'] = notSupported;
@@ -861,7 +867,6 @@ export class FsaNodeFs extends FsaNodeCore implements FsCallbackApi, FsSynchrono
   public readonly truncateSync: FsSynchronousApi['truncateSync'] = notSupported;
   public readonly unlinkSync: FsSynchronousApi['unlinkSync'] = notSupported;
   public readonly writeSync: FsSynchronousApi['writeSync'] = notSupported;
-
   public readonly chmodSync: FsSynchronousApi['chmodSync'] = noop;
   public readonly chownSync: FsSynchronousApi['chownSync'] = noop;
   public readonly fchmodSync: FsSynchronousApi['fchmodSync'] = noop;

src/fsa-to-node/types.ts

@@ -11,6 +11,7 @@ export interface FsaNodeSyncAdapterApi {
   readFile(req: { filename: string; opts?: opts.IReadFileOptions }): Uint8Array;
   writeFile(req: { filename: string; data: Uint8Array; opts?: opts.IWriteFileOptions }): void;
   appendFile(req: { filename: string; data: Uint8Array; opts?: opts.IAppendFileOptions }): void;
+  copy(req: { src: string; dst: string, flags?: number }): void;
 }
 
 export interface FsaNodeSyncAdapter {

src/fsa-to-node/worker/FsaNodeSyncWorker.ts

@@ -135,5 +135,8 @@ export class FsaNodeSyncWorker {
     appendFile: async ({ filename, data, opts }): Promise<void> => {
       await this.fs.promises.appendFile(filename, data, { ...opts, encoding: 'buffer' });
     },
+    copy: async ({ src, dst, flags }): Promise<void> => {
+      await this.fs.promises.copyFile(src, dst, flags);
+    },
   };
 }