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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 | 3x 3x 3x 3x 3x 3x 3x 3x 1x 3x 3x | import { access, constants, copyFile, rename, writeFile } from "fs-extra";
const BACKUP_EXTENSION = "bak";
const TMP_EXTENSION = "new";
export const writeFileWithBackupAsync = async (
path: string,
data: string | NodeJS.ArrayBufferView,
options: BufferEncoding | { encoding?: BufferEncoding } = "utf8",
): Promise<void> => {
const tmpPath = `${path}.${TMP_EXTENSION}`;
const bakPath = `${path}.${BACKUP_EXTENSION}`;
// Create backup if original exists
try {
await access(path, constants.F_OK);
await copyFile(path, bakPath);
} catch {
// File does not exist, no backup needed
}
// Write .new file and replace existing
await writeFile(tmpPath, data, options);
await rename(tmpPath, path);
};
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