You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
 
 
 

83 lines
2.6 KiB

/*
MIT License http://www.opensource.org/licenses/mit-license.php
Author Tobias Koppers @sokra
*/
"use strict";
const path = require("path");
const NORMALIZE_SLASH_DIRECTION_REGEXP = /\\/g;
const PATH_CHARS_REGEXP = /[-[\]{}()*+?.,\\^$|#\s]/g;
const SEPARATOR_REGEXP = /[/\\]$/;
const FRONT_OR_BACK_BANG_REGEXP = /^!|!$/g;
const INDEX_JS_REGEXP = /\/index.js(!|\?|\(query\))/g;
const MATCH_RESOURCE_REGEXP = /!=!/;
const normalizeBackSlashDirection = request => {
return request.replace(NORMALIZE_SLASH_DIRECTION_REGEXP, "/");
};
const createRegExpForPath = path => {
const regexpTypePartial = path.replace(PATH_CHARS_REGEXP, "\\$&");
return new RegExp(`(^|!)${regexpTypePartial}`, "g");
};
class RequestShortener {
constructor(directory) {
directory = normalizeBackSlashDirection(directory);
if (SEPARATOR_REGEXP.test(directory)) {
directory = directory.substr(0, directory.length - 1);
}
if (directory) {
this.currentDirectoryRegExp = createRegExpForPath(directory);
}
const dirname = path.dirname(directory);
const endsWithSeparator = SEPARATOR_REGEXP.test(dirname);
const parentDirectory = endsWithSeparator
? dirname.substr(0, dirname.length - 1)
: dirname;
if (parentDirectory && parentDirectory !== directory) {
this.parentDirectoryRegExp = createRegExpForPath(`${parentDirectory}/`);
}
if (__dirname.length >= 2) {
const buildins = normalizeBackSlashDirection(path.join(__dirname, ".."));
const buildinsAsModule =
this.currentDirectoryRegExp &&
this.currentDirectoryRegExp.test(buildins);
this.buildinsAsModule = buildinsAsModule;
this.buildinsRegExp = createRegExpForPath(buildins);
}
this.cache = new Map();
}
shorten(request) {
if (!request) return request;
const cacheEntry = this.cache.get(request);
if (cacheEntry !== undefined) {
return cacheEntry;
}
let result = normalizeBackSlashDirection(request);
if (this.buildinsAsModule && this.buildinsRegExp) {
result = result.replace(this.buildinsRegExp, "!(webpack)");
}
if (this.currentDirectoryRegExp) {
result = result.replace(this.currentDirectoryRegExp, "!.");
}
if (this.parentDirectoryRegExp) {
result = result.replace(this.parentDirectoryRegExp, "!../");
}
if (!this.buildinsAsModule && this.buildinsRegExp) {
result = result.replace(this.buildinsRegExp, "!(webpack)");
}
result = result.replace(INDEX_JS_REGEXP, "$1");
result = result.replace(FRONT_OR_BACK_BANG_REGEXP, "");
result = result.replace(MATCH_RESOURCE_REGEXP, " = ");
this.cache.set(request, result);
return result;
}
}
module.exports = RequestShortener;