masson/bootstrap/log.coffee.md

Module execution engine for cluster deployments.

---
title: 
layout: module
---

# Bootstrap Log

Gather system information

    fs = require 'fs'
    pad = require 'pad'
    mecano = require 'mecano'
    module.exports = []
    module.exports.push 'masson/bootstrap/mecano'

    module.exports.push name: 'Bootstrap # Log', required: true, callback: (ctx, next) ->
      mecano.mkdir
        destination: './logs'
      , (err, created) ->
        return next err if err
        host = ctx.config.host.split('.').reverse().join('.')
        # Add log interface
        ctx.log = log = (msg) ->
          log.out.write "#{msg}\n"
        log.out = fs.createWriteStream "./logs/#{host}_out.log"
        log.err = fs.createWriteStream "./logs/#{host}_err.log"
        close = ->
          setTimeout ->
            log.out.close()
            log.err.close()
          , 100
        ctx.on 'action', (status) ->
          if [ctx.PASS, ctx.OK, ctx.FAILED, ctx.DISABLED, ctx.STOP, ctx.TIMEOUT, ctx.WARN ].indexOf(status) isnt -1
            return log.out.write ">>> END #{(new Date).toISOString()}\n"
          return unless status is ctx.STARTED
          date = (new Date).toISOString()
          msg = "\n#{ctx.action.name}\n#{pad date.length+ctx.action.name.length, '', '-'}\n"
          log.out.write msg
          log.out.write ">>> START #{(new Date).toISOString()}\n"
          log.err.write msg
        ctx.on 'end', ->
          log.out.write '\nFINISHED WITH SUCCESS\n'
          close()
        ctx.on 'error', (err) ->
          log.out.write 'FINISHED WITH ERROR\n'
          print = (err) ->
            log.err.write err.stack or err.message + '\n'
          unless err.errors
            print err
          else if err.errors
            log.err.write err.message + '\n'
            for error in err.errors then print error
          close()
        next null, ctx.PASS