serverless/lib/utils/fs/readFileIfExists.js

'use strict';

const fileExists = require('./fileExists');
const readFile = require('./readFile');
const BbPromise = require('bluebird');

const readFileIfExists = function(filePath) {
  return fileExists(filePath).then(exists => {
    if (!exists) {
      return BbPromise.resolve(false);
    }
    return readFile(filePath);
  });
};

module.exports = readFileIfExists;