renovate/lib/util/pretty-time.ts

import is from '@sindresorhus/is';
import ms from 'ms';
import { logger } from '../logger';
import { regEx } from './regex';

const splitRegex = regEx(/(.*?[a-z]+)/);

function split(time: string): string[] {
  return time
    .split(splitRegex)
    .map((x) => x.trim())
    .filter(is.nonEmptyString);
}

function applyCustomFormat(spec: string): string {
  const monthRegex = regEx(/^(\d+)\s*(?:months?|M)$/);
  return spec.replace(monthRegex, (_, months) => `${months * 30} days`);
}

export function toMs(time: string): number | null {
  try {
    const specs = split(time).map(applyCustomFormat);
    if (!specs.length) {
      logger.debug({ time }, `Invalid time specifier: '${time}'`);
      return null;
    }

    let totalMillis = 0;
    for (const spec of specs) {
      const millis = ms(spec);
      if (!is.number(millis)) {
        logger.debug({ time }, `Invalid time specifier: '${spec}'`);
        return null;
      }
      totalMillis += millis;
    }
    return totalMillis;
  } catch (err) {
    logger.debug({ time, err }, `Invalid time specifier: '${time}'`);
    return null;
  }
}