'use strict'
const fs = require('fs')
const path = require('path')

/**
 * @param {string} source
 * @param {string} target
 * @return {boolean}
 */
function isStale(source, target) {
    if (!fs.existsSync(target)) {
        return true
    }
    const sourceTime = fs.statSync(source).mtime
    const targetTime = fs.statSync(target).mtime
    return sourceTime.getTime() > targetTime.getTime()
}

function createRelativeReadFileSync(baseFile) {
    const basePath = path.dirname(baseFile)
    return filename => fs.readFileSync(path.resolve(basePath, filename))
}

module.exports = {
    isStale,
    createRelativeReadFileSync
}