Function createCompilerHostWorker

test/fixtures/snapshot/typescript.js:115778–115880

(options, setParentNodes, system)

    /*@internal*/
    // TODO(shkamat): update this after reworking ts build API
    function createCompilerHostWorker(options, setParentNodes, system) {
        if (system === void 0) { system = ts.sys; }
        var existingDirectories = new ts.Map();
        var getCanonicalFileName = ts.createGetCanonicalFileName(system.useCaseSensitiveFileNames);
        var computeHash = ts.maybeBind(system, system.createHash) || ts.generateDjb2Hash;
        function getSourceFile(fileName, languageVersionOrOptions, onError) {
            var text;
            try {
                ts.performance.mark("beforeIORead");
                text = compilerHost.readFile(fileName);
                ts.performance.mark("afterIORead");
                ts.performance.measure("I/O Read", "beforeIORead", "afterIORead");
            }
            catch (e) {
                if (onError) {
                    onError(e.message);
                }
                text = "";
            }
            return text !== undefined ? ts.createSourceFile(fileName, text, languageVersionOrOptions, setParentNodes) : undefined;
        }
        function directoryExists(directoryPath) {
            if (existingDirectories.has(directoryPath)) {
                return true;
            }
            if ((compilerHost.directoryExists || system.directoryExists)(directoryPath)) {
                existingDirectories.set(directoryPath, true);
                return true;
            }
            return false;
        }
        function writeFile(fileName, data, writeByteOrderMark, onError) {
            try {
                ts.performance.mark("beforeIOWrite");
                // NOTE: If patchWriteFileEnsuringDirectory has been called,
                // the system.writeFile will do its own directory creation and
                // the ensureDirectoriesExist call will always be redundant.
                ts.writeFileEnsuringDirectories(fileName, data, writeByteOrderMark, function (path, data, writeByteOrderMark) { return writeFileWorker(path, data, writeByteOrderMark); }, function (path) { return (compilerHost.createDirectory || system.createDirectory)(path); }, function (path) { return directoryExists(path); });
                ts.performance.mark("afterIOWrite");
                ts.performance.measure("I/O Write", "beforeIOWrite", "afterIOWrite");
            }
            catch (e) {
                if (onError) {
                    onError(e.message);
                }
            }
        }
        var outputFingerprints;
        function writeFileWorker(fileName, data, writeByteOrderMark) {
            if (!ts.isWatchSet(options) || !system.getModifiedTime) {
                system.writeFile(fileName, data, writeByteOrderMark);
                return;
            }
            if (!outputFingerprints) {
                outputFingerprints = new ts.Map();
            }
            var hash = computeHash(data);
            var mtimeBefore = system.getModifiedTime(fileName);