import fs from "node:fs/promises" ;
import { describe, expect, it } from "vitest" ;
import {
maintainConfigBackups,
rotateConfigBackups,
hardenBackupPermissions,
cleanOrphanBackups,
} from "./backup-rotation.js" ;
import {
expectPosixMode,
IS_WINDOWS,
resolveConfigPathFromTempState,
} from "./config.backup-rotation.test-helpers.js" ;
import { withTempHome } from "./test-helpers.js" ;
import type { OpenClawConfig } from "./types.js" ;
describe("config backup rotation" , () => {
it("keeps a 5-deep backup ring for config writes" , async () => {
await withTempHome(async () => {
const configPath = resolveConfigPathFromTempState();
const buildConfig = (version: number): OpenClawConfig =>
({
agents: { list: [{ id: `v${version}` }] },
}) as OpenClawConfig;
const writeVersion = async (version: number) => {
const json = JSON.stringify(buildConfig(version), null , 2 ).trimEnd().concat("\n" );
await fs.writeFile(configPath, json, "utf-8" );
};
await writeVersion(0 );
for (let version = 1 ; version <= 6 ; version += 1 ) {
await rotateConfigBackups(configPath, fs);
await fs.copyFile(configPath, `${configPath}.bak`).catch (() => {
// best-effort
});
await writeVersion(version);
}
const readName = async (suffix = "" ) => {
const raw = await fs.readFile(`${configPath}${suffix}`, "utf-8" );
return (
(JSON.parse(raw) as { agents?: { list?: Array<{ id?: string }> } }).agents?.list?.[0 ]
?.id ?? null
);
};
await expect(readName()).resolves.toBe("v6" );
await expect(readName(".bak" )).resolves.toBe("v5" );
await expect(readName(".bak.1" )).resolves.toBe("v4" );
await expect(readName(".bak.2" )).resolves.toBe("v3" );
await expect(readName(".bak.3" )).resolves.toBe("v2" );
await expect(readName(".bak.4" )).resolves.toBe("v1" );
await expect(fs.stat(`${configPath}.bak.5 `)).rejects.toThrow();
});
});
// chmod is a no-op on Windows — 0o600 can never be observed there.
it.skipIf(IS_WINDOWS)("hardenBackupPermissions sets 0o600 on all backup files" , async () => {
await withTempHome(async () => {
const configPath = resolveConfigPathFromTempState();
// Create .bak and .bak.1 with permissive mode
await fs.writeFile(`${configPath}.bak`, "secret" , { mode: 0 o644 });
await fs.writeFile(`${configPath}.bak.1 `, "secret" , { mode: 0 o644 });
await hardenBackupPermissions(configPath, fs);
const bakStat = await fs.stat(`${configPath}.bak`);
const bak1Stat = await fs.stat(`${configPath}.bak.1 `);
expectPosixMode(bakStat.mode, 0 o600);
expectPosixMode(bak1Stat.mode, 0 o600);
});
});
it("cleanOrphanBackups removes stale files outside the rotation ring" , async () => {
await withTempHome(async () => {
const configPath = resolveConfigPathFromTempState();
// Create valid backups
await fs.writeFile(configPath, "current" );
await fs.writeFile(`${configPath}.bak`, "backup-0" );
await fs.writeFile(`${configPath}.bak.1 `, "backup-1" );
await fs.writeFile(`${configPath}.bak.2 `, "backup-2" );
// Create orphans
await fs.writeFile(`${configPath}.bak.1772352289 `, "orphan-pid" );
await fs.writeFile(`${configPath}.bak.before-marketing`, "orphan-manual" );
await fs.writeFile(`${configPath}.bak.99 `, "orphan-overflow" );
await cleanOrphanBackups(configPath, fs);
// Valid backups preserved
await expect(fs.stat(`${configPath}.bak`)).resolves.toBeDefined();
await expect(fs.stat(`${configPath}.bak.1 `)).resolves.toBeDefined();
await expect(fs.stat(`${configPath}.bak.2 `)).resolves.toBeDefined();
// Orphans removed
await expect(fs.stat(`${configPath}.bak.1772352289 `)).rejects.toThrow();
await expect(fs.stat(`${configPath}.bak.before-marketing`)).rejects.toThrow();
await expect(fs.stat(`${configPath}.bak.99 `)).rejects.toThrow();
// Main config untouched
await expect(fs.readFile(configPath, "utf-8" )).resolves.toBe("current" );
});
});
it("maintainConfigBackups composes rotate/copy/harden/prune flow" , async () => {
await withTempHome(async () => {
const configPath = resolveConfigPathFromTempState();
await fs.writeFile(configPath, JSON.stringify({ token: "secret" }), { mode: 0 o600 });
await fs.writeFile(`${configPath}.bak`, "previous" , { mode: 0 o644 });
await fs.writeFile(`${configPath}.bak.orphan`, "old" );
await maintainConfigBackups(configPath, fs);
// A new primary backup is created from the current config.
await expect(fs.readFile(`${configPath}.bak`, "utf-8" )).resolves.toBe(
JSON.stringify({ token: "secret" }),
);
// Prior primary backup gets rotated into ring slot 1.
await expect(fs.readFile(`${configPath}.bak.1 `, "utf-8" )).resolves.toBe("previous" );
// Windows cannot validate POSIX chmod bits, but all other compose assertions
// should still run there.
if (!IS_WINDOWS) {
const primaryBackupStat = await fs.stat(`${configPath}.bak`);
expectPosixMode(primaryBackupStat.mode, 0 o600);
}
// Out-of-ring orphan gets pruned.
await expect(fs.stat(`${configPath}.bak.orphan`)).rejects.toThrow();
});
});
});
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