1 | import Promise from 'es6-promise/lib/es6-promise/promise.js';
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2 | import MagicString from 'magic-string';
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3 | import first from './utils/first.js';
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4 | import { blank, keys } from './utils/object.js';
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5 | import Module from './Module.js';
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6 | import ExternalModule from './ExternalModule.js';
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7 | import finalisers from './finalisers/index.js';
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8 | import ensureArray from './utils/ensureArray.js';
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9 | import { load, onwarn, resolveId } from './utils/defaults.js';
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10 | import getExportMode from './utils/getExportMode.js';
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11 | import getIndentString from './utils/getIndentString.js';
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12 | import { unixizePath } from './utils/normalizePlatform.js';
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13 | import transform from './utils/transform.js';
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14 | import collapseSourcemaps from './utils/collapseSourcemaps.js';
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15 | import callIfFunction from './utils/callIfFunction.js';
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16 |
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17 | export default class Bundle {
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18 | constructor ( options ) {
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19 | this.entry = options.entry;
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20 | this.entryModule = null;
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21 |
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22 | this.plugins = ensureArray( options.plugins );
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23 |
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24 | this.resolveId = first(
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25 | this.plugins
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26 | .map( plugin => plugin.resolveId )
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27 | .filter( Boolean )
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28 | .concat( resolveId )
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29 | );
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30 |
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31 | this.load = first(
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32 | this.plugins
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33 | .map( plugin => plugin.load )
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34 | .filter( Boolean )
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35 | .concat( load )
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36 | );
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37 |
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38 | this.transformers = this.plugins
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39 | .map( plugin => plugin.transform )
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40 | .filter( Boolean );
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41 |
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42 | this.moduleById = blank();
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43 | this.modules = [];
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44 |
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45 | this.externalModules = [];
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46 | this.internalNamespaces = [];
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47 |
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48 | this.assumedGlobals = blank();
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49 |
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50 | this.external = options.external || [];
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51 | this.onwarn = options.onwarn || onwarn;
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52 |
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53 |
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54 | [ 'module', 'exports' ].forEach( global => this.assumedGlobals[ global ] = true );
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55 | }
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56 |
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57 | build () {
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58 |
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59 |
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60 |
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61 | return Promise.resolve( this.resolveId( this.entry, undefined ) )
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62 | .then( id => this.fetchModule( id, undefined ) )
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63 | .then( entryModule => {
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64 | this.entryModule = entryModule;
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65 |
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66 |
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67 |
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68 | this.modules.forEach( module => module.bindImportSpecifiers() );
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69 | this.modules.forEach( module => module.bindAliases() );
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70 | this.modules.forEach( module => module.bindReferences() );
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71 |
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72 |
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73 |
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74 |
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75 |
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76 | entryModule.getExports().forEach( name => {
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77 | const declaration = entryModule.traceExport( name );
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78 | declaration.isExported = true;
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79 |
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80 | declaration.use();
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81 | });
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82 |
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83 |
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84 | let settled = false;
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85 | while ( !settled ) {
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86 | settled = true;
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87 |
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88 | this.modules.forEach( module => {
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89 | if ( module.run() ) settled = false;
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90 | });
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91 | }
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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 | this.orderedModules = this.sort();
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97 | this.deconflict();
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98 | });
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99 | }
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100 |
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101 | deconflict () {
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102 | let used = blank();
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103 |
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104 |
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105 | keys( this.assumedGlobals ).forEach( name => used[ name ] = 1 );
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106 |
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107 | function getSafeName ( name ) {
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108 | while ( used[ name ] ) {
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109 | name += `$${used[name]++}`;
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110 | }
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111 |
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112 | used[ name ] = 1;
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113 | return name;
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114 | }
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115 |
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116 | this.externalModules.forEach( module => {
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117 | module.name = getSafeName( module.name );
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118 | });
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119 |
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120 | this.modules.forEach( module => {
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121 | keys( module.declarations ).forEach( originalName => {
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122 | const declaration = module.declarations[ originalName ];
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123 |
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124 | if ( originalName === 'default' ) {
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125 | if ( declaration.original && !declaration.original.isReassigned ) return;
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126 | }
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127 |
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128 | declaration.name = getSafeName( declaration.name );
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129 | });
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130 | });
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131 | }
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132 |
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133 | fetchModule ( id, importer ) {
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134 |
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135 | if ( id in this.moduleById ) return null;
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136 | this.moduleById[ id ] = null;
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137 |
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138 | return Promise.resolve( this.load( id ) )
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139 | .catch( err => {
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140 | let msg = `Could not load ${id}`;
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141 | if ( importer ) msg += ` (imported by ${importer})`;
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142 |
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143 | msg += `: ${err.message}`;
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144 | throw new Error( msg );
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145 | })
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146 | .then( source => transform( source, id, this.transformers ) )
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147 | .then( source => {
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148 | const { code, originalCode, ast, sourceMapChain } = source;
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149 |
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150 | const module = new Module({ id, code, originalCode, ast, sourceMapChain, bundle: this });
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151 |
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152 | this.modules.push( module );
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153 | this.moduleById[ id ] = module;
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154 |
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155 | return this.fetchAllDependencies( module ).then( () => module );
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156 | });
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157 | }
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158 |
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159 | fetchAllDependencies ( module ) {
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160 | const promises = module.dependencies.map( source => {
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161 | return Promise.resolve( this.resolveId( source, module.id ) )
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162 | .then( resolvedId => {
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163 | if ( !resolvedId ) {
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164 | if ( !~this.external.indexOf( source ) ) this.onwarn( `Treating '${source}' as external dependency` );
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165 | module.resolvedIds[ source ] = source;
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166 |
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167 | if ( !this.moduleById[ source ] ) {
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168 | const module = new ExternalModule( source );
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169 | this.externalModules.push( module );
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170 | this.moduleById[ source ] = module;
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171 | }
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172 | }
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173 |
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174 | else {
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175 | if ( resolvedId === module.id ) {
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176 | throw new Error( `A module cannot import itself (${resolvedId})` );
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177 | }
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178 |
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179 | module.resolvedIds[ source ] = resolvedId;
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180 | return this.fetchModule( resolvedId, module.id );
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181 | }
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182 | });
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183 | });
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184 |
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185 | return Promise.all( promises );
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186 | }
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187 |
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188 | render ( options = {} ) {
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189 | const format = options.format || 'es6';
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190 |
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191 |
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192 | const exportMode = getExportMode( this, options.exports );
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193 |
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194 | let magicString = new MagicString.Bundle({ separator: '\n\n' });
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195 | let usedModules = [];
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196 |
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197 | this.orderedModules.forEach( module => {
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198 | const source = module.render( format === 'es6' );
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199 | if ( source.toString().length ) {
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200 | magicString.addSource( source );
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201 | usedModules.push( module );
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202 | }
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203 | });
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204 |
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205 | const intro = [ options.intro ]
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206 | .concat(
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207 | this.plugins.map( plugin => plugin.intro && plugin.intro() )
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208 | )
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209 | .filter( Boolean )
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210 | .join( '\n\n' );
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211 |
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212 | if ( intro ) magicString.prepend( intro + '\n' );
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213 | if ( options.outro ) magicString.append( '\n' + options.outro );
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214 |
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215 | const indentString = getIndentString( magicString, options );
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216 |
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217 | const finalise = finalisers[ format ];
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218 | if ( !finalise ) throw new Error( `You must specify an output type - valid options are ${keys( finalisers ).join( ', ' )}` );
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219 |
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220 | magicString = finalise( this, magicString.trim(), { exportMode, indentString }, options );
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221 |
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222 | const banner = [ options.banner ]
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223 | .concat( this.plugins.map( plugin => plugin.banner ) )
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224 | .map( callIfFunction )
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225 | .filter( Boolean )
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226 | .join( '\n' );
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227 |
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228 | const footer = [ options.footer ]
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229 | .concat( this.plugins.map( plugin => plugin.footer ) )
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230 | .map( callIfFunction )
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231 | .filter( Boolean )
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232 | .join( '\n' );
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233 |
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234 | if ( banner ) magicString.prepend( banner + '\n' );
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235 | if ( footer ) magicString.append( '\n' + footer );
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236 |
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237 | const code = magicString.toString();
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238 | let map = null;
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239 |
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240 | if ( options.sourceMap ) {
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241 | const file = options.sourceMapFile || options.dest;
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242 | map = magicString.generateMap({
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243 | includeContent: true,
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244 | file
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245 |
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246 | });
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247 |
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248 | if ( this.transformers.length ) map = collapseSourcemaps( map, usedModules );
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249 | map.sources = map.sources.map( unixizePath );
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250 | }
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251 |
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252 | return { code, map };
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253 | }
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254 |
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255 | sort () {
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256 | let seen = {};
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257 | let ordered = [];
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258 | let hasCycles;
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259 |
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260 | let strongDeps = {};
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261 | let stronglyDependsOn = {};
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262 |
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263 | function visit ( module ) {
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264 | if ( seen[ module.id ] ) return;
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265 | seen[ module.id ] = true;
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266 |
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267 | const { strongDependencies, weakDependencies } = module.consolidateDependencies();
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268 |
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269 | strongDeps[ module.id ] = [];
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270 | stronglyDependsOn[ module.id ] = {};
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271 |
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272 | strongDependencies.forEach( imported => {
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273 | strongDeps[ module.id ].push( imported );
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274 |
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275 | if ( seen[ imported.id ] ) {
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276 |
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277 |
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278 | hasCycles = true;
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279 | return;
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280 | }
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281 |
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282 | visit( imported );
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283 | });
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284 |
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285 | weakDependencies.forEach( imported => {
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286 | if ( seen[ imported.id ] ) {
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287 |
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288 |
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289 | hasCycles = true;
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290 | return;
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291 | }
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292 |
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293 | visit( imported );
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294 | });
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295 |
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296 |
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297 | function addStrongDependencies ( dependency ) {
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298 | if ( stronglyDependsOn[ module.id ][ dependency.id ] ) return;
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299 |
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300 | stronglyDependsOn[ module.id ][ dependency.id ] = true;
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301 | strongDeps[ dependency.id ].forEach( addStrongDependencies );
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302 | }
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303 |
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304 | strongDeps[ module.id ].forEach( addStrongDependencies );
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305 |
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306 | ordered.push( module );
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307 | }
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308 |
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309 | this.modules.forEach( visit );
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310 |
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311 | if ( hasCycles ) {
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312 | let unordered = ordered;
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313 | ordered = [];
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314 |
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315 |
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316 | unordered.forEach( module => {
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317 |
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318 | strongDeps[ module.id ].forEach( place );
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319 |
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320 | function place ( dep ) {
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321 | if ( !stronglyDependsOn[ dep.id ][ module.id ] && !~ordered.indexOf( dep ) ) {
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322 | strongDeps[ dep.id ].forEach( place );
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323 | ordered.push( dep );
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324 | }
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325 | }
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326 |
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327 | if ( !~ordered.indexOf( module ) ) {
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328 | ordered.push( module );
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329 | }
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330 | });
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331 | }
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332 |
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333 | return ordered;
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334 | }
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335 | }
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