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import { existsSync, mkdirSync, copyFileSync, writeFileSync, readFileSync } from 'fs'; import { dirname } from 'path'; export interface SafeWriteOptions { backup?: boolean; // create .bak force?: boolean; // overwrite without prompting } export function ensureParentExists(path: string) { const parent = dirname(path); if (!parent || parent === '.') return; try { mkdirSync(parent, { recursive: true }); } catch { /* ignore */ } } export function backupFileIfExists(path: string): string | null { try { if (existsSync(path)) { const bak = `${path}.bak`; copyFileSync(path, bak); return bak; } } catch { // ignore } return null; } export function safeWriteFile(path: string, content: string, opts: SafeWriteOptions = { backup: true, force: false }): { written: boolean; backupPath?: string } { ensureParentExists(path); if (existsSync(path) && !opts.force) { return { written: false }; } let bak: string | undefined; if (opts.backup && existsSync(path)) { bak = backupFileIfExists(path) || undefined; } try { writeFileSync(path, content, 'utf-8'); return { written: true, backupPath: bak }; } catch (err) { return { written: false }; } } export function readFileSafe(path: string): string | null { try { if (!existsSync(path)) return null; return readFileSync(path, 'utf-8'); } catch { return null; } }