Function getVersionedSourceFileByPath

test/fixtures/snapshot/typescript.js:123606–123647

(fileName, path, languageVersionOrOptions, onError, shouldCreateNewSourceFile)

            return directoryStructureHost.fileExists(fileName);
        }
        function getVersionedSourceFileByPath(fileName, path, languageVersionOrOptions, onError, shouldCreateNewSourceFile) {
            var hostSourceFile = sourceFilesCache.get(path);
            // No source file on the host
            if (isFileMissingOnHost(hostSourceFile)) {
                return undefined;
            }
            // Create new source file if requested or the versions dont match
            if (hostSourceFile === undefined || shouldCreateNewSourceFile || isFilePresenceUnknownOnHost(hostSourceFile)) {
                var sourceFile = getNewSourceFile(fileName, languageVersionOrOptions, onError);
                if (hostSourceFile) {
                    if (sourceFile) {
                        // Set the source file and create file watcher now that file was present on the disk
                        hostSourceFile.sourceFile = sourceFile;
                        hostSourceFile.version = sourceFile.version;
                        if (!hostSourceFile.fileWatcher) {
                            hostSourceFile.fileWatcher = watchFilePath(path, fileName, onSourceFileChange, ts.PollingInterval.Low, watchOptions, ts.WatchType.SourceFile);
                        }
                    }
                    else {
                        // There is no source file on host any more, close the watch, missing file paths will track it
                        if (hostSourceFile.fileWatcher) {
                            hostSourceFile.fileWatcher.close();
                        }
                        sourceFilesCache.set(path, false);
                    }
                }
                else {
                    if (sourceFile) {
                        var fileWatcher = watchFilePath(path, fileName, onSourceFileChange, ts.PollingInterval.Low, watchOptions, ts.WatchType.SourceFile);
                        sourceFilesCache.set(path, { sourceFile: sourceFile, version: sourceFile.version, fileWatcher: fileWatcher });
                    }
                    else {
                        sourceFilesCache.set(path, false);
                    }
                }
                if (sourceFile) {
                    sourceFile.impliedNodeFormat = ts.getImpliedNodeFormatForFile(path, resolutionCache.getModuleResolutionCache().getPackageJsonInfoCache(), compilerHost, compilerHost.getCompilationSettings());
                }
                return sourceFile;
            }
            return hostSourceFile.sourceFile;
        }
        function nextSourceFileVersion(path) {
            var hostSourceFile = sourceFilesCache.get(path);
            if (hostSourceFile !== undefined) {