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coffee = require 'coffeescript'{join} = require 'path'klaw = require 'klaw'fs = require 'fs/promises'
compile = (file)=>  txt = await fs.readFile(file,"utf8")  {js,v3SourceMap} = coffee.compile(txt,{bare:true, sourceMap:true})  r = []  importing = 0  for line from js.split("\n")    if line.startsWith("import ")      importing = []    if importing      line = line.trim()      if line[line.length-1] == ";"        line = importing.join(' ')+line[...-1]        line = line.replace(/'/g,'"')        add = true        for suffix from ['.js"','.ts"']          if line.endsWith suffix            add = false            break        if add          line = line[...-1]+'.js"'        r.push line        importing = 0      else        importing.push line    else      r.push line  [    r.join "\n"    v3SourceMap  ]compile2file = (file, out)=>  [js,map] = await compile(file)  fs.writeFile out, js  fs.writeFile out+".map", mapcompileDir = (indir, outdir)=>  inlen = indir.length  todo = []  new Promise (resolve)=>    klaw(indir)      .on(        'data'        ({path})=>          if not path.endsWith '.coffee'            return          js = join outdir, path[inlen...-7]+".js"          todo.push compile2file(path, js)      ).on(        'end'        =>          await Promise.all(todo)          resolve()      )do =>  {argv} = process  args = argv[2]  if args == "--output"    [outdir,indir] = argv[3..]    pwd = process.cwd()    outdir = join pwd, outdir    indir = join pwd, indir    await compileDir indir, outdir  else    console.log await compile args  process.exit()