astral-sh-setup-uv/src/download/checksum/update-known-checksums.ts

import { promises as fs } from "node:fs";

export interface ChecksumEntry {
  key: string;
  checksum: string;
}

export async function updateChecksums(
  filePath: string,
  checksumEntries: ChecksumEntry[],
): Promise<void> {
  await fs.rm(filePath);
  await fs.appendFile(
    filePath,
    "// AUTOGENERATED_DO_NOT_EDIT\nexport const KNOWN_CHECKSUMS: { [key: string]: string } = {\n",
  );
  let firstLine = true;
  for (const entry of checksumEntries) {
    if (!firstLine) {
      await fs.appendFile(filePath, ",\n");
    }
    await fs.appendFile(filePath, `  "${entry.key}":\n    "${entry.checksum}"`);
    firstLine = false;
  }
  await fs.appendFile(filePath, ",\n};\n");
}