sha1-from-file generate a short sha1 hash from a file's contents install npm install sha1-from-file --save usage import { createReadStream, readFileSync } from 'fs'import hash, { sync } from 'sha1-from-file' // async (ES6-)hash(createReadStream('./file.txt')).then(myHash => ...) // async (ES7)const myHash = await hash(createReadStream('./file.txt')) // sync (buffer)const myHash = sync(new Buffer(...)) // sync (string)const myHash = sync(readFileSync('./file.txt', 'utf-8')) // "1bhh17h"