opts.js

   1 /**
   2  * @file      Establishes runtime options from args and config files
   3  * @author    Ken Grimes
   4  * @version   0.0.1
   5  * @license   AGPL-3.0
   6  * @copyright jk software 2017
   7  */
   8 const fs = require('fs')
   9 const path = require('path')
  10
  11 /**
  12  * @summary Parse arguments with minimist
  13  */
  14 exports = require('minimist')(process.argv.slice(2), {
  15   string:  [ 'config', 'client-js', 'host-js', 'ca-cert', 'ca-key',
  16              'port', 'index', 'bind', 'electron', 'dedicated'
  17            ],
  18   boolean: [ 'no-tls', 'legacy-socket' ],
  19   alias:   { c: 'config',
  20              j: 'client-js',
  21              J: 'host-js',
  22              T: 'no-tls',
  23              C: 'ca-cert',
  24              K: 'ca-key',
  25              p: 'port',
  26              i: 'index',
  27              b: 'bind',
  28              e: 'electron',
  29              d: 'dedicated'
  30            },
  31   stopEarly: true,
  32   unknown: (opt) => {
  33     console.log('Unknown operator: ' + opt)
  34     console.log(process.argv.join(' '))
  35     console.log(fs.readFileSync('./usage', { encoding: 'utf8' }))
  36     process.exit()
  37   }
  38 })
  39
  40 /**
  41  * @summary Defaults
  42  */
  43 exports['defaults'] = {
  44   config:      '/etc/strapp.conf:~/.strapp/strapp.conf:./strapp.conf',
  45   'client-js': './client.js',
  46   'host-js':   './host.js',
  47   tls:         true,
  48   'ca-cert':   '../certs/cert.pem',
  49   'ca-key':    '../certs/key.pem',
  50   port:        2443,
  51   index:       './index.html',
  52   bind:        'www:./www',
  53   electron:    undefined,
  54   dedicated:   undefined,
  55   'legacy-socket': false
  56 }
  57
  58 exports = Object.assign({}, exports['defaults'], exports)
  59
  60 /**
  61  * @summary Parse config files
  62  */
  63 exports['conf'] = {}
  64 exports['config'].split(':').forEach((fileName) => {
  65   let filePath = path.resolve(fileName)
  66   if (fs.existsSync(filePath)){
  67     let lineNo = 0;
  68     String(fs.readFileSync(path.resolve(fileName))).split('\n').forEach((line) => {
  69       lineNo++
  70       /* Skip comments */
  71       if (!line.match(/[\s]*#/)) {
  72         let kv = line.replace(/#.*/g,'').replace(/\s/g,'').split('=')
  73         if (kv.length == 2 && kv[0] in exports['defaults']) {
  74           /* Multiple "bind=..." lines in are additive */
  75           if (kv[0] === 'bind' && 'bind' in exports['conf']) {
  76               kv[1] = exports['conf']['bind'] + ',' + kv[1]
  77           }
  78           exports['conf'][kv[0]] = kv[1]
  79         }
  80         else
  81           console.log(`WARN: Bad option ${line} in ${fileName}:${lineNo}`)
  82       }
  83     })
  84   }
  85   else if (exports['config'] !== exports['defaults']['config'])
  86     console.log(`WARN: opt '-c${exports['config']}', ${fileName} inaccessible`)
  87 })
  88
  89 exports = Object.assign({}, exports['defaults'], exports['conf'], exports)
  90
  91 /**
  92  * @summary Parse bindings
  93  */
  94 exports['bindings'] = {}
  95 exports['bind'].replace(/\s/g,'').split(',').forEach((kvp) => {
  96   let kv = kvp.split(':')
  97   kv[1] = path.resolve(kv[1])
  98   if (fs.existsSync(kv[1])) {
  99     if (kv.length == 2 && /^[-_.A-Za-z0-9]/g.test(kv[0]))
 100       exports['bindings'][kv[0]] = path.normalize(kv[1])
 101     else
 102       console.log(`WARN: Invalid binding: ${kvp}`)
 103   }
 104   else
 105     console.log(`WARN: Binding not made, directory ${kvp} inaccessible`)
 106 })
 107
 108 module.exports = exports