Makelore 2.0 initial clean snapshot

electron/opencode/filesystem-retry.ts

@@ -0,0 +1,40 @@
+export interface FilesystemRetryOptions {
+  retryDelaysMs?: readonly number[];
+  wait?: (delayMs: number) => void;
+}
+
+const DEFAULT_RETRY_DELAYS_MS = [100, 300, 900] as const;
+const TRANSIENT_FILESYSTEM_ERROR_CODES = new Set([
+  'EIO',
+  'EPERM',
+  'EBUSY',
+  'EACCES',
+]);
+
+function waitSynchronously(delayMs: number): void {
+  const signal = new Int32Array(new SharedArrayBuffer(Int32Array.BYTES_PER_ELEMENT));
+  Atomics.wait(signal, 0, 0, delayMs);
+}
+
+export function retryTransientFilesystemOperation<T>(
+  operation: () => T,
+  options: FilesystemRetryOptions = {},
+): T {
+  const retryDelaysMs = options.retryDelaysMs ?? DEFAULT_RETRY_DELAYS_MS;
+  const wait = options.wait ?? waitSynchronously;
+
+  for (let attempt = 0; ; attempt += 1) {
+    try {
+      return operation();
+    } catch (error) {
+      const code = error && typeof error === 'object' && 'code' in error
+        ? String(error.code)
+        : '';
+      const delayMs = retryDelaysMs[attempt];
+      if (!TRANSIENT_FILESYSTEM_ERROR_CODES.has(code) || delayMs === undefined) {
+        throw error;
+      }
+      wait(delayMs);
+    }
+  }
+}