language-service.js

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
var bs_logger_1 = require("bs-logger");
var memoize = require("lodash.memoize");
var path_1 = require("path");
var messages_1 = require("../util/messages");
var hasOwn = Object.prototype.hasOwnProperty;
exports.compileUsingLanguageService = function (configs, logger, memoryCache) {
    var _a;
    logger.debug('compileUsingLanguageService(): create typescript compiler');
    var ts = configs.compilerModule, cwd = configs.cwd, options = configs.typescript.options, serviceHostTraceCtx = (_a = {
            namespace: 'ts:serviceHost',
            call: null
        },
        _a[bs_logger_1.LogContexts.logLevel] = bs_logger_1.LogLevels.trace,
        _a);
    var projectVersion = 1;
    var updateMemoryCache = function (code, fileName) {
        var _a;
        logger.debug({ fileName: fileName }, "updateMemoryCache(): update memory cache for language service");
        var fileVersion = (_a = memoryCache.versions[fileName]) !== null && _a !== void 0 ? _a : 0, isFileInCache = fileVersion !== 0;
        if (!isFileInCache) {
            memoryCache.versions[fileName] = 1;
        }
        if (memoryCache.contents[fileName] !== code) {
            memoryCache.contents[fileName] = code;
            memoryCache.versions[fileName] = fileVersion + 1;
            projectVersion++;
        }
    };
    var serviceHost = {
        getProjectVersion: function () { return String(projectVersion); },
        getScriptFileNames: function () { return Object.keys(memoryCache.versions); },
        getScriptVersion: function (fileName) {
            var normalizedFileName = path_1.normalize(fileName), version = memoryCache.versions[normalizedFileName];
            return version === undefined ? undefined : String(version);
        },
        getScriptSnapshot: function (fileName) {
            var normalizedFileName = path_1.normalize(fileName), hit = hasOwn.call(memoryCache.contents, normalizedFileName);
            logger.trace({ normalizedFileName: normalizedFileName, cacheHit: hit }, "getScriptSnapshot():", 'cache', hit ? 'hit' : 'miss');
            if (!hit) {
                memoryCache.contents[normalizedFileName] = ts.sys.readFile(normalizedFileName);
            }
            var contents = memoryCache.contents[normalizedFileName];
            if (contents === undefined) {
                return;
            }
            return ts.ScriptSnapshot.fromString(contents);
        },
        fileExists: memoize(ts.sys.fileExists),
        readFile: logger.wrap(serviceHostTraceCtx, 'readFile', memoize(ts.sys.readFile)),
        readDirectory: memoize(ts.sys.readDirectory),
        getDirectories: memoize(ts.sys.getDirectories),
        directoryExists: memoize(ts.sys.directoryExists),
        realpath: memoize(ts.sys.realpath),
        getNewLine: function () { return '\n'; },
        getCurrentDirectory: function () { return cwd; },
        getCompilationSettings: function () { return options; },
        getDefaultLibFileName: function () { return ts.getDefaultLibFilePath(options); },
        getCustomTransformers: function () { return configs.tsCustomTransformers; },
    };
    logger.debug('compileUsingLanguageService(): creating language service');
    var service = ts.createLanguageService(serviceHost);
    return {
        compileFn: function (code, fileName) {
            var normalizedFileName = path_1.normalize(fileName);
            logger.debug({ normalizedFileName: normalizedFileName }, 'compileFn(): compiling using language service');
            updateMemoryCache(code, normalizedFileName);
            var output = service.getEmitOutput(normalizedFileName);
            if (output.emitSkipped) {
                throw new TypeError(path_1.relative(cwd, normalizedFileName) + ": Emit skipped for language service");
            }
            if (!output.outputFiles.length) {
                throw new TypeError(messages_1.interpolate("Unable to require `.d.ts` file for file: {{file}}.\nThis is usually the result of a faulty configuration or import. Make sure there is a `.js`, `.json` or another executable extension available alongside `{{file}}`.", {
                    file: path_1.basename(normalizedFileName),
                }));
            }
            return [output.outputFiles[1].text, output.outputFiles[0].text];
        },
        diagnoseFn: function (code, filePath) {
            var normalizedFileName = path_1.normalize(filePath);
            updateMemoryCache(code, normalizedFileName);
            if (configs.shouldReportDiagnostic(normalizedFileName)) {
                logger.debug({ normalizedFileName: normalizedFileName }, 'compileFn(): computing diagnostics for language service');
                var diagnostics = service
                    .getCompilerOptionsDiagnostics()
                    .concat(service.getSyntacticDiagnostics(normalizedFileName))
                    .concat(service.getSemanticDiagnostics(normalizedFileName));
                configs.raiseDiagnostics(diagnostics, normalizedFileName, logger);
            }
        },
        program: service.getProgram(),
    };
};