sc4/lib/cli/backup.js

A command line utility for automating SimCity 4 modding tasks & modifying savegames

// # backup.js
import fs from 'node:fs/promises';
import path from 'node:path';
import config from './config.js';
const backupDir = path.resolve(path.dirname(config.path), '../backups');
// # backup()
// Creates a new backup, while also verifying any expired backups.
export default async function backup(file, opts) {
    const { logger } = opts;
    await clean({ logger });
    let iso = dateToDir(new Date());
    let dir = path.join(backupDir, iso);
    await fs.mkdir(dir, { recursive: true });
    let destination = path.join(dir, path.basename(file));
    await fs.copyFile(file, destination);
    logger?.info(`A backup was saved to ${destination}`);
}
// # clean(opts)
// Cleans the backup folder by removing any backups older than 14 days.
export async function clean(opts = {}) {
    const { logger } = opts;
    let list = await readdir(backupDir);
    let now = Date.now();
    let tasks = [];
    for (let dirname of list) {
        let year = dirname.slice(0, 4);
        let month = dirname.slice(4, 6);
        let date = dirname.slice(6, 8);
        let when = new Date(+year, +month - 1, +date, 0, 0, 0);
        if (now - when > 60e3 * 60 * 24 * 14) {
            let fullPath = path.join(backupDir, dirname);
            tasks.push(fs.rm(fullPath, { recursive: true }));
        }
    }
    if (tasks.length > 0) {
        logger?.info(`Removed ${tasks.length} outdated backup directories.`);
        await Promise.all(tasks);
    }
}
function dateToDir(date) {
    let year = date.getFullYear();
    let month = String(date.getMonth() + 1).padStart(2, '0');
    let day = String(date.getDate()).padStart(2, '0');
    let hours = String(date.getHours()).padStart(2, '0');
    let minutes = String(date.getMinutes()).padStart(2, '0');
    let seconds = String(date.getSeconds()).padStart(2, '0');
    return `${year}${month}${day}/${hours}${minutes}${seconds}`;
}
async function readdir(dir) {
    let list = [];
    try {
        list = await fs.readdir(dir);
    }
    catch (e) {
        if (e.code !== 'ENOENT') {
            console.error(e);
        }
    }
    return list;
}