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authorruki <waruqi@gmail.com>2018-11-08 00:38:48 +0800
committerruki <waruqi@gmail.com>2018-11-07 21:53:09 +0800
commit26105034da4fcce7ac883c899d781f016559310d (patch)
treec459a5dc4e3aa0972d9919033ece511ce76dd129 /node_modules/enhanced-resolve/lib/AliasPlugin.js
parent2c77f00f1a7ecb6c8192f9c16d3b2001b254a107 (diff)
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Diffstat (limited to 'node_modules/enhanced-resolve/lib/AliasPlugin.js')
-rw-r--r--node_modules/enhanced-resolve/lib/AliasPlugin.js56
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diff --git a/node_modules/enhanced-resolve/lib/AliasPlugin.js b/node_modules/enhanced-resolve/lib/AliasPlugin.js
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+/*
+ MIT License http://www.opensource.org/licenses/mit-license.php
+ Author Tobias Koppers @sokra
+*/
+"use strict";
+
+function startsWith(string, searchString) {
+ const stringLength = string.length;
+ const searchLength = searchString.length;
+
+ // early out if the search length is greater than the search string
+ if(searchLength > stringLength) {
+ return false;
+ }
+ let index = -1;
+ while(++index < searchLength) {
+ if(string.charCodeAt(index) !== searchString.charCodeAt(index)) {
+ return false;
+ }
+ }
+ return true;
+}
+
+module.exports = class AliasPlugin {
+ constructor(source, options, target) {
+ this.source = source;
+ this.options = Array.isArray(options) ? options : [options];
+ this.target = target;
+ }
+
+ apply(resolver) {
+ const target = resolver.ensureHook(this.target);
+ resolver.getHook(this.source).tapAsync("AliasPlugin", (request, resolveContext, callback) => {
+ const innerRequest = request.request || request.path;
+ if(!innerRequest) return callback();
+ for(const item of this.options) {
+ if(innerRequest === item.name || (!item.onlyModule && startsWith(innerRequest, item.name + "/"))) {
+ if(innerRequest !== item.alias && !startsWith(innerRequest, item.alias + "/")) {
+ const newRequestStr = item.alias + innerRequest.substr(item.name.length);
+ const obj = Object.assign({}, request, {
+ request: newRequestStr
+ });
+ return resolver.doResolve(target, obj, "aliased with mapping '" + item.name + "': '" + item.alias + "' to '" + newRequestStr + "'", resolveContext, (err, result) => {
+ if(err) return callback(err);
+
+ // Don't allow other aliasing or raw request
+ if(result === undefined) return callback(null, null);
+ callback(null, result);
+ });
+ }
+ }
+ }
+ return callback();
+ });
+ }
+};