Create large files

generate-file

#!/usr/bin/env coffee --nodejs --harmony

fs = require 'fs'

MB = 1048576

[ignore, ignore, filePath, megabytes] = process.argv
fileSize = 0
words = fs.readFileSync('/usr/share/dict/words').toString().split("\n")
ws = fs.createWriteStream(filePath)
megabytes ?= 0.25

if not filePath? 
  console.log "usage: generate-text output-file [SIZE-IN-MB]"
  return

write = ->
  while fileSize < MB * megabytes
    line = ""
    while line.length < 80
      wordIndex = Math.floor(Math.random() * words.length)
      line += " " + words[wordIndex]

    fileSize += (line.length + 1)
    if not ws.write(line + "\n")
      ws.once('drain', write)
      return

  ws.end()

write()

Como se usa?

generate-text five-megabytes-of-words.txt 5

Source: atom/atom#307 (comment)