1 |
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5 |
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6 | "use strict";
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7 |
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8 | const { ConcatSource } = require("webpack-sources");
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9 | const Template = require("./Template");
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10 |
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11 |
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12 |
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13 |
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14 |
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15 |
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16 |
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17 |
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18 | class SystemMainTemplatePlugin {
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19 | |
20 |
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21 |
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22 | constructor(options) {
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23 | this.name = options.name;
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24 | }
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25 |
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26 | |
27 |
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28 |
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29 |
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30 | apply(compilation) {
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31 | const { mainTemplate, chunkTemplate } = compilation;
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32 |
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33 | const onRenderWithEntry = (source, chunk, hash) => {
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34 | const externals = chunk.getModules().filter(m => m.external);
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35 |
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36 |
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37 | const name = this.name
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38 | ? `${JSON.stringify(
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39 | mainTemplate.getAssetPath(this.name, { hash, chunk })
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40 | )}, `
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41 | : "";
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42 |
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43 |
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44 | const systemDependencies = JSON.stringify(
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45 | externals.map(m =>
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46 | typeof m.request === "object" ? m.request.amd : m.request
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47 | )
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48 | );
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49 |
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50 |
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51 | const dynamicExport = "__WEBPACK_DYNAMIC_EXPORT__";
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52 |
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53 |
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54 | const externalWebpackNames = externals.map(
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55 | m => `__WEBPACK_EXTERNAL_MODULE_${Template.toIdentifier(`${m.id}`)}__`
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56 | );
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57 |
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58 |
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59 | const externalVarDeclarations =
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60 | externalWebpackNames.length > 0
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61 | ? `var ${externalWebpackNames.join(", ")};`
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62 | : "";
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63 |
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64 |
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65 | const setters =
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66 | externalWebpackNames.length === 0
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67 | ? ""
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68 | : Template.asString([
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69 | "setters: [",
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70 | Template.indent(
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71 | externalWebpackNames
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72 | .map(external =>
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73 | Template.asString([
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74 | "function(module) {",
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75 | Template.indent(`${external} = module;`),
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76 | "}"
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77 | ])
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78 | )
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79 | .join(",\n")
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80 | ),
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81 | "],"
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82 | ]);
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83 |
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84 | return new ConcatSource(
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85 | Template.asString([
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86 | `System.register(${name}${systemDependencies}, function(${dynamicExport}) {`,
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87 | Template.indent([
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88 | externalVarDeclarations,
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89 | "return {",
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90 | Template.indent([
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91 | setters,
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92 | "execute: function() {",
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93 | Template.indent(`${dynamicExport}(`)
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94 | ])
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95 | ])
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96 | ]) + "\n",
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97 | source,
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98 | "\n" +
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99 | Template.asString([
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100 | Template.indent([
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101 | Template.indent([Template.indent([");"]), "}"]),
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102 | "};"
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103 | ]),
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104 | "})"
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105 | ])
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106 | );
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107 | };
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108 |
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109 | for (const template of [mainTemplate, chunkTemplate]) {
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110 | template.hooks.renderWithEntry.tap(
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111 | "SystemMainTemplatePlugin",
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112 | onRenderWithEntry
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113 | );
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114 | }
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115 |
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116 | mainTemplate.hooks.globalHashPaths.tap(
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117 | "SystemMainTemplatePlugin",
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118 | paths => {
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119 | if (this.name) {
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120 | paths.push(this.name);
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121 | }
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122 | return paths;
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123 | }
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124 | );
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125 |
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126 | mainTemplate.hooks.hash.tap("SystemMainTemplatePlugin", hash => {
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127 | hash.update("exports system");
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128 | if (this.name) {
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129 | hash.update(this.name);
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130 | }
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131 | });
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132 | }
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133 | }
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134 |
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135 | module.exports = SystemMainTemplatePlugin;
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