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- "use strict";
- Object.defineProperty(exports, "__esModule", { value: true });
- exports.matchFromAbsolutePathsAsync = exports.createMatchPathAsync = void 0;
- var path = require("path");
- var TryPath = require("./try-path");
- var MappingEntry = require("./mapping-entry");
- var Filesystem = require("./filesystem");
- /**
- * See the sync version for docs.
- */
- function createMatchPathAsync(absoluteBaseUrl, paths, mainFields, addMatchAll) {
- if (mainFields === void 0) { mainFields = ["main"]; }
- if (addMatchAll === void 0) { addMatchAll = true; }
- var absolutePaths = MappingEntry.getAbsoluteMappingEntries(absoluteBaseUrl, paths, addMatchAll);
- return function (requestedModule, readJson, fileExists, extensions, callback) {
- return matchFromAbsolutePathsAsync(absolutePaths, requestedModule, readJson, fileExists, extensions, callback, mainFields);
- };
- }
- exports.createMatchPathAsync = createMatchPathAsync;
- /**
- * See the sync version for docs.
- */
- function matchFromAbsolutePathsAsync(absolutePathMappings, requestedModule, readJson, fileExists, extensions, callback, mainFields) {
- if (readJson === void 0) { readJson = Filesystem.readJsonFromDiskAsync; }
- if (fileExists === void 0) { fileExists = Filesystem.fileExistsAsync; }
- if (extensions === void 0) { extensions = Object.keys(require.extensions); }
- if (mainFields === void 0) { mainFields = ["main"]; }
- var tryPaths = TryPath.getPathsToTry(extensions, absolutePathMappings, requestedModule);
- if (!tryPaths) {
- return callback();
- }
- findFirstExistingPath(tryPaths, readJson, fileExists, callback, 0, mainFields);
- }
- exports.matchFromAbsolutePathsAsync = matchFromAbsolutePathsAsync;
- function findFirstExistingMainFieldMappedFile(packageJson, mainFields, packageJsonPath, fileExistsAsync, doneCallback, index) {
- if (index === void 0) { index = 0; }
- if (index >= mainFields.length) {
- return doneCallback(undefined, undefined);
- }
- var tryNext = function () {
- return findFirstExistingMainFieldMappedFile(packageJson, mainFields, packageJsonPath, fileExistsAsync, doneCallback, index + 1);
- };
- var mainFieldMapping = packageJson[mainFields[index]];
- if (typeof mainFieldMapping !== "string") {
- // Skip mappings that are not pointers to replacement files
- return tryNext();
- }
- var mappedFilePath = path.join(path.dirname(packageJsonPath), mainFieldMapping);
- fileExistsAsync(mappedFilePath, function (err, exists) {
- if (err) {
- return doneCallback(err);
- }
- if (exists) {
- return doneCallback(undefined, mappedFilePath);
- }
- return tryNext();
- });
- }
- // Recursive loop to probe for physical files
- function findFirstExistingPath(tryPaths, readJson, fileExists, doneCallback, index, mainFields) {
- if (index === void 0) { index = 0; }
- if (mainFields === void 0) { mainFields = ["main"]; }
- var tryPath = tryPaths[index];
- if (tryPath.type === "file" ||
- tryPath.type === "extension" ||
- tryPath.type === "index") {
- fileExists(tryPath.path, function (err, exists) {
- if (err) {
- return doneCallback(err);
- }
- if (exists) {
- return doneCallback(undefined, TryPath.getStrippedPath(tryPath));
- }
- if (index === tryPaths.length - 1) {
- return doneCallback();
- }
- // Continue with the next path
- return findFirstExistingPath(tryPaths, readJson, fileExists, doneCallback, index + 1, mainFields);
- });
- }
- else if (tryPath.type === "package") {
- readJson(tryPath.path, function (err, packageJson) {
- if (err) {
- return doneCallback(err);
- }
- if (packageJson) {
- return findFirstExistingMainFieldMappedFile(packageJson, mainFields, tryPath.path, fileExists, function (mainFieldErr, mainFieldMappedFile) {
- if (mainFieldErr) {
- return doneCallback(mainFieldErr);
- }
- if (mainFieldMappedFile) {
- return doneCallback(undefined, mainFieldMappedFile);
- }
- // No field in package json was a valid option. Continue with the next path.
- return findFirstExistingPath(tryPaths, readJson, fileExists, doneCallback, index + 1, mainFields);
- });
- }
- // This is async code, we need to return unconditionally, otherwise the code still falls
- // through and keeps recursing. While this might work in general, libraries that use neo-async
- // like Webpack will actually not allow you to call the same callback twice.
- //
- // An example of where this caused issues:
- // https://github.com/dividab/tsconfig-paths-webpack-plugin/issues/11
- //
- // Continue with the next path
- return findFirstExistingPath(tryPaths, readJson, fileExists, doneCallback, index + 1, mainFields);
- });
- }
- else {
- TryPath.exhaustiveTypeException(tryPath.type);
- }
- }
- //# sourceMappingURL=match-path-async.js.map
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