markdown wathcer

watcher.coffee

###

Purpose:
Print web preview in lynx when the markdown file edited.

System requirement:
brew install markdown
brew install lynx

Usage:
coffee watcher.coffee path/to/x.markdown

###

util = require("util")
fs = require "fs"
spawn = require("child_process").spawn
args = process.argv.splice(2)+''

preview = (next)->
  md = spawn("markdown", [ args ])
  lynx = spawn("lynx" , ["--dump", "-assume_charset=utf-8", "-stdin" ])
  md.stdout.on "data", (data) ->
    lynx.stdin.write data

  md.stderr.on "data", (data) ->
    console.log "markdown stderr: " + data

  md.on "exit", (code) ->
    console.log "markdown process exited with code " + code  if code isnt 0
    lynx.stdin.end()

  lynx.stdout.on "data", (data) ->
    console.log data.toString()

  lynx.stderr.on "data", (data) ->
    console.log "lynx stderr: " + data

  lynx.on "exit", (code) ->
    console.log "lynx process exited with code " + code  if code isnt 0
    next()

watcher = ()->
  console.log "####### watcher is running ########\n\n"
  fs.watchFile args,()->
    fs.unwatchFile args
    preview(watcher)

watcher()