1 |
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2 |
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3 |
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4 |
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5 | "use strict";
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6 |
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7 | const asyncLib = require("neo-async");
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8 | const path = require("path");
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9 |
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10 | const {
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11 | Tapable,
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12 | AsyncSeriesWaterfallHook,
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13 | SyncWaterfallHook
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14 | } = require("tapable");
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15 | const ContextModule = require("./ContextModule");
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16 | const ContextElementDependency = require("./dependencies/ContextElementDependency");
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17 |
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18 |
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19 |
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20 | const EMPTY_RESOLVE_OPTIONS = {};
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21 |
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22 | module.exports = class ContextModuleFactory extends Tapable {
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23 | constructor(resolverFactory) {
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24 | super();
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25 | this.hooks = {
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26 |
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27 | beforeResolve: new AsyncSeriesWaterfallHook(["data"]),
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28 |
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29 | afterResolve: new AsyncSeriesWaterfallHook(["data"]),
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30 |
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31 | contextModuleFiles: new SyncWaterfallHook(["files"]),
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32 |
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33 | alternatives: new AsyncSeriesWaterfallHook(["modules"])
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34 | };
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35 | this._pluginCompat.tap("ContextModuleFactory", options => {
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36 | switch (options.name) {
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37 | case "before-resolve":
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38 | case "after-resolve":
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39 | case "alternatives":
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40 | options.async = true;
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41 | break;
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42 | }
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43 | });
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44 | this.resolverFactory = resolverFactory;
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45 | }
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46 |
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47 | create(data, callback) {
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48 | const context = data.context;
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49 | const dependencies = data.dependencies;
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50 | const resolveOptions = data.resolveOptions;
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51 | const dependency = dependencies[0];
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52 | this.hooks.beforeResolve.callAsync(
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53 | Object.assign(
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54 | {
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55 | context: context,
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56 | dependencies: dependencies,
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57 | resolveOptions
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58 | },
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59 | dependency.options
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60 | ),
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61 | (err, beforeResolveResult) => {
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62 | if (err) return callback(err);
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63 |
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64 |
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65 | if (!beforeResolveResult) return callback();
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66 |
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67 | const context = beforeResolveResult.context;
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68 | const request = beforeResolveResult.request;
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69 | const resolveOptions = beforeResolveResult.resolveOptions;
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70 |
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71 | let loaders,
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72 | resource,
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73 | loadersPrefix = "";
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74 | const idx = request.lastIndexOf("!");
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75 | if (idx >= 0) {
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76 | let loadersRequest = request.substr(0, idx + 1);
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77 | let i;
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78 | for (
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79 | i = 0;
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80 | i < loadersRequest.length && loadersRequest[i] === "!";
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81 | i++
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82 | ) {
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83 | loadersPrefix += "!";
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84 | }
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85 | loadersRequest = loadersRequest
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86 | .substr(i)
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87 | .replace(/!+$/, "")
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88 | .replace(/!!+/g, "!");
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89 | if (loadersRequest === "") {
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90 | loaders = [];
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91 | } else {
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92 | loaders = loadersRequest.split("!");
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93 | }
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94 | resource = request.substr(idx + 1);
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95 | } else {
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96 | loaders = [];
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97 | resource = request;
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98 | }
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99 |
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100 | const contextResolver = this.resolverFactory.get(
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101 | "context",
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102 | resolveOptions || EMPTY_RESOLVE_OPTIONS
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103 | );
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104 | const loaderResolver = this.resolverFactory.get(
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105 | "loader",
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106 | EMPTY_RESOLVE_OPTIONS
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107 | );
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108 |
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109 | asyncLib.parallel(
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110 | [
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111 | callback => {
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112 | contextResolver.resolve(
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113 | {},
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114 | context,
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115 | resource,
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116 | {},
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117 | (err, result) => {
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118 | if (err) return callback(err);
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119 | callback(null, result);
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120 | }
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121 | );
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122 | },
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123 | callback => {
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124 | asyncLib.map(
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125 | loaders,
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126 | (loader, callback) => {
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127 | loaderResolver.resolve(
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128 | {},
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129 | context,
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130 | loader,
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131 | {},
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132 | (err, result) => {
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133 | if (err) return callback(err);
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134 | callback(null, result);
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135 | }
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136 | );
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137 | },
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138 | callback
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139 | );
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140 | }
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141 | ],
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142 | (err, result) => {
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143 | if (err) return callback(err);
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144 |
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145 | this.hooks.afterResolve.callAsync(
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146 | Object.assign(
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147 | {
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148 | addon:
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149 | loadersPrefix +
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150 | result[1].join("!") +
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151 | (result[1].length > 0 ? "!" : ""),
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152 | resource: result[0],
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153 | resolveDependencies: this.resolveDependencies.bind(this)
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154 | },
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155 | beforeResolveResult
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156 | ),
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157 | (err, result) => {
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158 | if (err) return callback(err);
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159 |
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160 |
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161 | if (!result) return callback();
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162 |
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163 | return callback(
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164 | null,
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165 | new ContextModule(result.resolveDependencies, result)
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166 | );
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167 | }
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168 | );
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169 | }
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170 | );
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171 | }
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172 | );
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173 | }
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174 |
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175 | resolveDependencies(fs, options, callback) {
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176 | const cmf = this;
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177 | let resource = options.resource;
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178 | let resourceQuery = options.resourceQuery;
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179 | let recursive = options.recursive;
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180 | let regExp = options.regExp;
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181 | let include = options.include;
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182 | let exclude = options.exclude;
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183 | if (!regExp || !resource) return callback(null, []);
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184 |
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185 | const addDirectory = (directory, callback) => {
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186 | fs.readdir(directory, (err, files) => {
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187 | if (err) return callback(err);
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188 | files = cmf.hooks.contextModuleFiles.call(files);
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189 | if (!files || files.length === 0) return callback(null, []);
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190 | asyncLib.map(
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191 | files.filter(p => p.indexOf(".") !== 0),
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192 | (segment, callback) => {
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193 | const subResource = path.join(directory, segment);
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194 |
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195 | if (!exclude || !subResource.match(exclude)) {
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196 | fs.stat(subResource, (err, stat) => {
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197 | if (err) {
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198 | if (err.code === "ENOENT") {
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199 |
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200 |
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201 | return callback();
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202 | } else {
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203 | return callback(err);
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204 | }
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205 | }
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206 |
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207 | if (stat.isDirectory()) {
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208 | if (!recursive) return callback();
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209 | addDirectory.call(this, subResource, callback);
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210 | } else if (
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211 | stat.isFile() &&
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212 | (!include || subResource.match(include))
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213 | ) {
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214 | const obj = {
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215 | context: resource,
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216 | request:
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217 | "." +
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218 | subResource.substr(resource.length).replace(/\\/g, "/")
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219 | };
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220 |
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221 | this.hooks.alternatives.callAsync(
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222 | [obj],
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223 | (err, alternatives) => {
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224 | if (err) return callback(err);
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225 | alternatives = alternatives
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226 | .filter(obj => regExp.test(obj.request))
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227 | .map(obj => {
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228 | const dep = new ContextElementDependency(
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229 | obj.request + resourceQuery,
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230 | obj.request
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231 | );
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232 | dep.optional = true;
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233 | return dep;
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234 | });
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235 | callback(null, alternatives);
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236 | }
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237 | );
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238 | } else {
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239 | callback();
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240 | }
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241 | });
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242 | } else {
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243 | callback();
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244 | }
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245 | },
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246 | (err, result) => {
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247 | if (err) return callback(err);
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248 |
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249 | if (!result) return callback(null, []);
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250 |
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251 | callback(
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252 | null,
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253 | result.filter(Boolean).reduce((a, i) => a.concat(i), [])
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254 | );
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255 | }
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256 | );
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257 | });
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258 | };
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259 |
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260 | addDirectory(resource, callback);
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261 | }
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262 | };
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