kuyin-webpack-plugins/lib/utils/shared.js

custom webpack, enhanced-resolve plugins

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
const tslib_1 = require("tslib");
const fs_1 = tslib_1.__importDefault(require("fs"));
function cached(fn) {
    const cache = Object.create(null);
    return function (str) {
        const hit = cache[str];
        // eslint-disable-next-line no-return-assign
        return hit || (cache[str] = fn(str));
    };
}
exports.cached = cached;
exports.existsSync = cached(function (filePath) {
    return fs_1.default.existsSync(filePath);
});
function startsWith(source, searchString) {
    const stringLength = source.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 (source.charCodeAt(index) !== searchString.charCodeAt(index)) {
            return false;
        }
    }
    return true;
}
exports.startsWith = startsWith;
const extensionPattern = /\.(\w+)(?:$|\?.*)/;
exports.getExtension = cached(function (path) {
    const result = path.match(extensionPattern);
    if (result && result[1]) {
        return result[1];
    }
    return '';
});