Function createWatchProgram

test/fixtures/snapshot/typescript.js:123344–124014

(host)

    }
    ts.createWatchCompilerHost = createWatchCompilerHost;
    function createWatchProgram(host) {
        var builderProgram;
        var reloadLevel; // level to indicate if the program needs to be reloaded from config file/just filenames etc
        var missingFilesMap; // Map of file watchers for the missing files
        var packageJsonMap; // map of watchers for package json files used in module resolution
        var watchedWildcardDirectories; // map of watchers for the wild card directories in the config file
        var timerToUpdateProgram; // timer callback to recompile the program
        var timerToInvalidateFailedLookupResolutions; // timer callback to invalidate resolutions for changes in failed lookup locations
        var parsedConfigs; // Parsed commandline and watching cached for referenced projects
        var sharedExtendedConfigFileWatchers; // Map of file watchers for extended files, shared between different referenced projects
        var extendedConfigCache = host.extendedConfigCache; // Cache for extended config evaluation
        var changesAffectResolution = false; // Flag for indicating non-config changes affect module resolution
        var reportFileChangeDetectedOnCreateProgram = false; // True if synchronizeProgram should report "File change detected..." when a new program is created
        var sourceFilesCache = new ts.Map(); // Cache that stores the source file and version info
        var missingFilePathsRequestedForRelease; // These paths are held temporarily so that we can remove the entry from source file cache if the file is not tracked by missing files
        var hasChangedCompilerOptions = false; // True if the compiler options have changed between compilations
        var useCaseSensitiveFileNames = host.useCaseSensitiveFileNames();
        var currentDirectory = host.getCurrentDirectory();
        var configFileName = host.configFileName, _a = host.optionsToExtend, optionsToExtendForConfigFile = _a === void 0 ? {} : _a, watchOptionsToExtend = host.watchOptionsToExtend, extraFileExtensions = host.extraFileExtensions, createProgram = host.createProgram;
        var rootFileNames = host.rootFiles, compilerOptions = host.options, watchOptions = host.watchOptions, projectReferences = host.projectReferences;
        var wildcardDirectories;
        var configFileParsingDiagnostics;
        var canConfigFileJsonReportNoInputFiles = false;
        var hasChangedConfigFileParsingErrors = false;
        var cachedDirectoryStructureHost = configFileName === undefined ? undefined : ts.createCachedDirectoryStructureHost(host, currentDirectory, useCaseSensitiveFileNames);
        var directoryStructureHost = cachedDirectoryStructureHost || host;
        var parseConfigFileHost = ts.parseConfigHostFromCompilerHostLike(host, directoryStructureHost);
        // From tsc we want to get already parsed result and hence check for rootFileNames
        var newLine = updateNewLine();
        if (configFileName && host.configFileParsingResult) {
            setConfigFileParsingResult(host.configFileParsingResult);
            newLine = updateNewLine();
        }
        reportWatchDiagnostic(ts.Diagnostics.Starting_compilation_in_watch_mode);
        if (configFileName && !host.configFileParsingResult) {
            newLine = ts.getNewLineCharacter(optionsToExtendForConfigFile, function () { return host.getNewLine(); });
            ts.Debug.assert(!rootFileNames);
            parseConfigFile();
            newLine = updateNewLine();
        }
        var _b = ts.createWatchFactory(host, compilerOptions), watchFile = _b.watchFile, watchDirectory = _b.watchDirectory, writeLog = _b.writeLog;
        var getCanonicalFileName = ts.createGetCanonicalFileName(useCaseSensitiveFileNames);
        writeLog("Current directory: ".concat(currentDirectory, " CaseSensitiveFileNames: ").concat(useCaseSensitiveFileNames));
        var configFileWatcher;
        if (configFileName) {
            configFileWatcher = watchFile(configFileName, scheduleProgramReload, ts.PollingInterval.High, watchOptions, ts.WatchType.ConfigFile);
        }
        var compilerHost = ts.createCompilerHostFromProgramHost(host, function () { return compilerOptions; }, directoryStructureHost);
        ts.setGetSourceFileAsHashVersioned(compilerHost, host);
        // Members for CompilerHost
        var getNewSourceFile = compilerHost.getSourceFile;
        compilerHost.getSourceFile = function (fileName) {
            var args = [];
            for (var _i = 1; _i < arguments.length; _i++) {
                args[_i - 1] = arguments[_i];
            }
            return getVersionedSourceFileByPath.apply(void 0, __spreadArray([fileName, toPath(fileName)], args, false));
        };