William Valentin
27 lines
793 B
TypeScript
27 lines
793 B
TypeScript
import { copyFileSync, existsSync, mkdirSync, renameSync, writeFileSync } from 'fs';
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import { dirname } from 'path';
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import { stringify } from 'yaml';
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import type { Config } from './schema.js';
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/**
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* Persist config atomically:
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* 1) Backup existing file to <path>.bak
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* 2) Write new YAML to temp file
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* 3) Rename temp file into place
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*/
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export function persistConfig(configPath: string, config: Config): void {
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const dir = dirname(configPath);
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mkdirSync(dir, { recursive: true });
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const yaml = stringify(config);
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const tmpPath = `${configPath}.tmp-${process.pid}-${Date.now()}`;
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const backupPath = `${configPath}.bak`;
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if (existsSync(configPath)) {
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copyFileSync(configPath, backupPath);
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}
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writeFileSync(tmpPath, yaml, 'utf-8');
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renameSync(tmpPath, configPath);
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}
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