57 lines
1.7 KiB
JavaScript
57 lines
1.7 KiB
JavaScript
/*
|
|
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();
|
|
});
|
|
}
|
|
};
|