✨ feat: Initial commit

src/main/lib/atomicFile.ts

@@ -0,0 +1,33 @@
+import { mkdir, open, rename } from "node:fs/promises";
+import { mkdirSync, renameSync, writeFileSync, openSync, fsyncSync, closeSync } from "node:fs";
+import { dirname } from "node:path";
+
+function tmpName(file: string): string {
+  return `${file}.${process.pid}.${Date.now()}.tmp`;
+}
+
+export async function writeFileAtomic(file: string, data: string): Promise<void> {
+  await mkdir(dirname(file), { recursive: true });
+  const tmp = tmpName(file);
+  const handle = await open(tmp, "w");
+  try {
+    await handle.writeFile(data);
+    await handle.sync();
+  } finally {
+    await handle.close();
+  }
+  await rename(tmp, file);
+}
+
+export function writeFileAtomicSync(file: string, data: string): void {
+  mkdirSync(dirname(file), { recursive: true });
+  const tmp = tmpName(file);
+  const fd = openSync(tmp, "w");
+  try {
+    writeFileSync(fd, data);
+    fsyncSync(fd);
+  } finally {
+    closeSync(fd);
+  }
+  renameSync(tmp, file);
+}