53 lines
2.0 KiB
JavaScript
53 lines
2.0 KiB
JavaScript
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"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.getAbsoluteMappingEntries = void 0;
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var path = require("path");
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/**
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* Converts an absolute baseUrl and paths to an array of absolute mapping entries.
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* The array is sorted by longest prefix.
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* Having an array with entries allows us to keep a sorting order rather than
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* sort by keys each time we use the mappings.
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* @param absoluteBaseUrl
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* @param paths
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* @param addMatchAll
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*/
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function getAbsoluteMappingEntries(absoluteBaseUrl, paths, addMatchAll) {
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// Resolve all paths to absolute form once here, and sort them by
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// longest prefix once here, this saves time on each request later.
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// We need to put them in an array to preserve the sorting order.
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var sortedKeys = sortByLongestPrefix(Object.keys(paths));
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var absolutePaths = [];
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for (var _i = 0, sortedKeys_1 = sortedKeys; _i < sortedKeys_1.length; _i++) {
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var key = sortedKeys_1[_i];
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absolutePaths.push({
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pattern: key,
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paths: paths[key].map(function (pathToResolve) {
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return path.join(absoluteBaseUrl, pathToResolve);
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}),
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});
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}
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// If there is no match-all path specified in the paths section of tsconfig, then try to match
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// all paths relative to baseUrl, this is how typescript works.
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if (!paths["*"] && addMatchAll) {
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absolutePaths.push({
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pattern: "*",
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paths: ["".concat(absoluteBaseUrl.replace(/\/$/, ""), "/*")],
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});
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}
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return absolutePaths;
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}
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exports.getAbsoluteMappingEntries = getAbsoluteMappingEntries;
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/**
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* Sort path patterns.
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* If a module name can be matched with multiple patterns then pattern with the longest prefix will be picked.
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*/
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function sortByLongestPrefix(arr) {
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return arr
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.concat()
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.sort(function (a, b) { return getPrefixLength(b) - getPrefixLength(a); });
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}
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function getPrefixLength(pattern) {
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var prefixLength = pattern.indexOf("*");
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return pattern.substr(0, prefixLength).length;
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}
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//# sourceMappingURL=mapping-entry.js.map
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