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