Function tryGetModuleNameFromExports

test/fixtures/snapshot/typescript.js:122410–122475

(options, targetFilePath, packageDirectory, packageName, exports, conditions, mode)

            MatchingMode[MatchingMode["Pattern"] = 2] = "Pattern";
        })(MatchingMode || (MatchingMode = {}));
        function tryGetModuleNameFromExports(options, targetFilePath, packageDirectory, packageName, exports, conditions, mode) {
            if (mode === void 0) { mode = 0 /* MatchingMode.Exact */; }
            if (typeof exports === "string") {
                var pathOrPattern = ts.getNormalizedAbsolutePath(ts.combinePaths(packageDirectory, exports), /*currentDirectory*/ undefined);
                var extensionSwappedTarget = ts.hasTSFileExtension(targetFilePath) ? ts.removeFileExtension(targetFilePath) + tryGetJSExtensionForFile(targetFilePath, options) : undefined;
                switch (mode) {
                    case 0 /* MatchingMode.Exact */:
                        if (ts.comparePaths(targetFilePath, pathOrPattern) === 0 /* Comparison.EqualTo */ || (extensionSwappedTarget && ts.comparePaths(extensionSwappedTarget, pathOrPattern) === 0 /* Comparison.EqualTo */)) {
                            return { moduleFileToTry: packageName };
                        }
                        break;
                    case 1 /* MatchingMode.Directory */:
                        if (ts.containsPath(pathOrPattern, targetFilePath)) {
                            var fragment = ts.getRelativePathFromDirectory(pathOrPattern, targetFilePath, /*ignoreCase*/ false);
                            return { moduleFileToTry: ts.getNormalizedAbsolutePath(ts.combinePaths(ts.combinePaths(packageName, exports), fragment), /*currentDirectory*/ undefined) };
                        }
                        break;
                    case 2 /* MatchingMode.Pattern */:
                        var starPos = pathOrPattern.indexOf("*");
                        var leadingSlice = pathOrPattern.slice(0, starPos);
                        var trailingSlice = pathOrPattern.slice(starPos + 1);
                        if (ts.startsWith(targetFilePath, leadingSlice) && ts.endsWith(targetFilePath, trailingSlice)) {
                            var starReplacement = targetFilePath.slice(leadingSlice.length, targetFilePath.length - trailingSlice.length);
                            return { moduleFileToTry: packageName.replace("*", starReplacement) };
                        }
                        if (extensionSwappedTarget && ts.startsWith(extensionSwappedTarget, leadingSlice) && ts.endsWith(extensionSwappedTarget, trailingSlice)) {
                            var starReplacement = extensionSwappedTarget.slice(leadingSlice.length, extensionSwappedTarget.length - trailingSlice.length);
                            return { moduleFileToTry: packageName.replace("*", starReplacement) };
                        }
                        break;
                }
            }
            else if (Array.isArray(exports)) {
                return ts.forEach(exports, function (e) { return tryGetModuleNameFromExports(options, targetFilePath, packageDirectory, packageName, e, conditions); });
            }
            else if (typeof exports === "object" && exports !== null) { // eslint-disable-line no-null/no-null
                if (ts.allKeysStartWithDot(exports)) {
                    // sub-mappings
                    // 3 cases:
                    // * directory mappings (legacyish, key ends with / (technically allows index/extension resolution under cjs mode))
                    // * pattern mappings (contains a *)
                    // * exact mappings (no *, does not end with /)
                    return ts.forEach(ts.getOwnKeys(exports), function (k) {
                        var subPackageName = ts.getNormalizedAbsolutePath(ts.combinePaths(packageName, k), /*currentDirectory*/ undefined);
                        var mode = ts.endsWith(k, "/") ? 1 /* MatchingMode.Directory */
                            : ts.stringContains(k, "*") ? 2 /* MatchingMode.Pattern */
                                : 0 /* MatchingMode.Exact */;
                        return tryGetModuleNameFromExports(options, targetFilePath, packageDirectory, subPackageName, exports[k], conditions, mode);
                    });
                }
                else {
                    // conditional mapping
                    for (var _i = 0, _a = ts.getOwnKeys(exports); _i < _a.length; _i++) {
                        var key = _a[_i];
                        if (key === "default" || conditions.indexOf(key) >= 0 || ts.isApplicableVersionedTypesKey(conditions, key)) {
                            var subTarget = exports[key];
                            var result = tryGetModuleNameFromExports(options, targetFilePath, packageDirectory, packageName, subTarget, conditions);
                            if (result) {