46 lines
1.7 KiB
TypeScript
46 lines
1.7 KiB
TypeScript
import { randomUUID } from "node:crypto";
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import { mkdir, open, readFile, rename, rm } from "node:fs/promises";
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import path from "node:path";
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import type { DesktopSetup } from "@rakazo/contracts";
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import { parseStoredSetup, SETUP_FILE_NAME, serializeSetup } from "./setup-config.js";
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export function setupFilePath(userDataDir: string): string {
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return path.join(userDataDir, SETUP_FILE_NAME);
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}
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/** Returns null when setup has not run yet, or when the saved file is unusable. */
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export async function readSetup(userDataDir: string): Promise<DesktopSetup | null> {
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let raw: string;
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try {
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raw = await readFile(setupFilePath(userDataDir), "utf8");
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} catch {
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return null;
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}
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return parseStoredSetup(raw);
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}
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export async function writeSetup(userDataDir: string, setup: DesktopSetup): Promise<void> {
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await mkdir(userDataDir, { recursive: true });
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const destination = setupFilePath(userDataDir);
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const temporary = `${destination}.${process.pid}.${randomUUID()}.tmp`;
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let file: Awaited<ReturnType<typeof open>> | undefined;
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try {
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file = await open(temporary, "wx", 0o600);
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await file.writeFile(serializeSetup(setup), "utf8");
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await file.sync();
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await file.close();
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file = undefined;
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// Replacing the complete file avoids following a malicious final symlink and
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// leaves either the old or new valid JSON after an interrupted write.
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await rename(temporary, destination);
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} finally {
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await file?.close().catch(() => undefined);
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await rm(temporary, { force: true }).catch(() => undefined);
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}
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}
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/** Removes saved setup so the next launch runs first-run again. */
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export async function clearSetup(userDataDir: string): Promise<void> {
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await rm(setupFilePath(userDataDir), { force: true });
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}
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