1 | var debug = require('debug')('bankai.graph-service-worker')
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2 | var assert = require('assert')
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3 | var path = require('path')
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4 |
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5 | var browserify = require('browserify')
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6 | var watchify = require('watchify')
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7 | var tinyify = require('tinyify')
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8 | var brfs = require('brfs')
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9 |
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10 | var ttyError = require('./tty-error')
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11 | var exorcise = require('./exorcise')
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12 | var utils = require('./utils')
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13 |
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14 | var filenames = [
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15 | 'service-worker.js',
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16 | 'sw.js'
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17 | ]
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18 |
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19 | module.exports = node
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20 |
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21 | function node (state, createEdge) {
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22 | var entry = state.metadata.entry
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23 | var self = this
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24 | var unwatch
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25 |
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26 | assert.strictEqual(typeof entry, 'string', 'bankai.service-worker: state.metadata.entries should be type string')
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27 |
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28 | var basedir = state.metadata.dirname
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29 |
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30 | if (state.metadata.watch && !state.metadata.watchers.serviceWorker) {
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31 | state.metadata.watchers.serviceWorker = true
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32 | debug('watching ' + basedir + ' for ' + filenames.join(', '))
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33 | unwatch = utils.watch(basedir, filenames, parse)
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34 | this.on('close', function () {
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35 | debug('closing file watcher')
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36 | if (unwatch) unwatch()
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37 | })
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38 | }
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39 |
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40 | parse()
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41 |
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42 | function parse () {
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43 | utils.find(basedir, filenames, function (err, filename) {
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44 | if (err) {
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45 | state.metadata.serviceWorker = 'service-worker.js'
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46 | return createEdge('bundle', Buffer.from(''), {
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47 | mime: 'application/javascript'
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48 | })
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49 | }
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50 |
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51 |
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52 | state.metadata.serviceWorker = path.basename(filename)
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53 |
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54 | var b = browserify(browserifyOpts([ filename ]))
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55 |
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56 | if (state.metadata.watch && !state.metadata.watchers.serviceWorker) {
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57 | if (unwatch) unwatch()
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58 | state.metadata.watchers.serviceWorker = true
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59 | debug('watchify: watching ' + filename)
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60 | b = watchify(b)
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61 | b.on('update', function () {
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62 | debug('watchify: update detected in ' + filename)
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63 | bundleScripts()
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64 | })
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65 | self.on('close', function () {
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66 | debug('closing file watcher')
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67 | b.close()
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68 | })
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69 | }
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70 |
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71 | var env = Object.assign({}, process.env, fileEnv(state))
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72 | b.transform(brfs)
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73 | if (!state.metadata.watch) b.plugin(tinyify, { env: env })
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74 |
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75 | bundleScripts()
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76 |
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77 | function bundleScripts () {
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78 | b.bundle(function (err, bundle) {
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79 | if (err) {
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80 | delete err.stream
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81 | err = ttyError('service-worker', 'browserify.bundle', err)
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82 | return self.emit('error', 'scripts', 'browserify.bundle', err)
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83 | }
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84 | var mapName = 'bankai-service-worker.js.map'
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85 | exorcise(bundle, mapName, function (err, bundle, map) {
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86 | if (err) return self.emit('error', 'service-worker', 'exorcise', err)
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87 | createEdge(mapName, map, {
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88 | mime: 'application/json'
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89 | })
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90 | createEdge('bundle', bundle, {
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91 | mime: 'application/javascript'
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92 | })
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93 | })
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94 | })
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95 | }
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96 | })
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97 | }
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98 | }
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99 |
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100 | function browserifyOpts (entries) {
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101 | assert.ok(Array.isArray(entries), 'browserifyOpts: entries should be an array')
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102 | return {
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103 | debug: true,
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104 | entries: entries,
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105 | packageCache: {},
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106 | cache: {}
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107 | }
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108 | }
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109 |
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110 | function fileEnv (state) {
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111 | var script = [
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112 | `${state.scripts.bundle.hash.toString('hex').slice(0, 16)}/bundle.js`
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113 | ]
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114 | var style = [`${state.styles.bundle.hash.toString('hex').slice(0, 16)}/bundle.css`]
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115 | var assets = split(state.assets.list.buffer)
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116 | var doc = split(state.documents.list.buffer).map(function (url) {
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117 | return url.slice(1)
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118 | })
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119 | var manifest = ['manifest.json']
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120 |
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121 | var files = [].concat(script, style, assets, doc, manifest)
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122 | files = files.filter(function (file) {
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123 | return file
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124 | })
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125 |
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126 | return {
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127 | STYLE_LIST: style,
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128 | SCRIPT_LIST: script,
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129 | ASSET_LIST: assets,
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130 | DOCUMENT_LIST: doc,
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131 | MANIFEST_LIST: manifest,
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132 | FILE_LIST: files
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133 | }
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134 |
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135 | function split (buf) {
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136 | var str = String(buf)
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137 | return str.split(',')
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138 | }
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139 | }
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