graphql-code-generator/dist/utils/watcher.js

"use strict";
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
    return new (P || (P = Promise))(function (resolve, reject) {
        function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
        function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
        function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }
        step((generator = generator.apply(thisArg, _arguments || [])).next());
    });
};
var __generator = (this && this.__generator) || function (thisArg, body) {
    var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;
    return g = { next: verb(0), "throw": verb(1), "return": verb(2) }, typeof Symbol === "function" && (g[Symbol.iterator] = function() { return this; }), g;
    function verb(n) { return function (v) { return step([n, v]); }; }
    function step(op) {
        if (f) throw new TypeError("Generator is already executing.");
        while (_) try {
            if (f = 1, y && (t = op[0] & 2 ? y["return"] : op[0] ? y["throw"] || ((t = y["return"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t;
            if (y = 0, t) op = [op[0] & 2, t.value];
            switch (op[0]) {
                case 0: case 1: t = op; break;
                case 4: _.label++; return { value: op[1], done: false };
                case 5: _.label++; y = op[1]; op = [0]; continue;
                case 7: op = _.ops.pop(); _.trys.pop(); continue;
                default:
                    if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }
                    if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }
                    if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }
                    if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }
                    if (t[2]) _.ops.pop();
                    _.trys.pop(); continue;
            }
            op = body.call(thisArg, _);
        } catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }
        if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };
    }
};
var _this = this;
Object.defineProperty(exports, "__esModule", { value: true });
var codegen_1 = require("../codegen");
var graphql_codegen_core_1 = require("graphql-codegen-core");
var watchman = require("fb-watchman");
var pify = require("pify");
var helpers_1 = require("../helpers");
var isValidPath = require("is-valid-path");
var isGlob = require("is-glob");
var getMatch = function (doc) {
    // strip leading `./` from pattern, it doesn't work with that
    return ['match', doc.replace(/^\.\//, ''), 'wholename'];
};
exports.createWatcher = function (config, onNext) {
    var files = [];
    var documents = helpers_1.normalizeInstanceOrArray(config.documents);
    var schemas = helpers_1.normalizeInstanceOrArray(config.schema);
    // Add schemas and documents from "generates"
    Object.keys(config.generates)
        .map(function (filename) { return helpers_1.normalizeOutputParam(config.generates[filename]); })
        .forEach(function (conf) {
        schemas.push.apply(schemas, helpers_1.normalizeInstanceOrArray(conf.schema));
        documents.push.apply(documents, helpers_1.normalizeInstanceOrArray(conf.documents));
    });
    if (documents) {
        files.push.apply(files, documents);
    }
    schemas.forEach(function (schema) {
        if (isGlob(schema) || isValidPath(schema)) {
            files.push(schema);
        }
    });
    var client = pify(new watchman.Client());
    var runWatcher = function () { return __awaiter(_this, void 0, void 0, function () {
        var version, _a, warning, watch, _b, relative_path, clock, sub, subscribe, isShutdown, shutdown;
        var _this = this;
        return __generator(this, function (_c) {
            switch (_c.label) {
                case 0: return [4 /*yield*/, client.capabilityCheck({
                        optional: [],
                        required: ['relative_root', 'wildmatch']
                    })];
                case 1:
                    version = (_c.sent()).version;
                    graphql_codegen_core_1.getLogger().info("Watching for changes with watchman v" + version + "...");
                    return [4 /*yield*/, client.command(['watch-project', process.cwd()])];
                case 2:
                    _a = _c.sent(), warning = _a.warning, watch = _a.watch, _b = _a.relative_path, relative_path = _b === void 0 ? '' : _b;
                    if (warning) {
                        graphql_codegen_core_1.getLogger().warn(warning);
                    }
                    return [4 /*yield*/, client.command(['clock', watch])];
                case 3:
                    clock = (_c.sent()).clock;
                    sub = {
                        relative_root: relative_path,
                        expression: ['allof', ['anyof'].concat(files.map(getMatch)), ['not', 'empty'], ['type', 'f']],
                        fields: ['name', 'size', 'mtime_ms', 'exists'],
                        since: clock
                    };
                    return [4 /*yield*/, client.command(['subscribe', watch, 'codegen', sub])];
                case 4:
                    subscribe = (_c.sent()).subscribe;
                    isShutdown = false;
                    shutdown = function () { return __awaiter(_this, void 0, void 0, function () {
                        return __generator(this, function (_a) {
                            switch (_a.label) {
                                case 0:
                                    isShutdown = true;
                                    graphql_codegen_core_1.getLogger().info('Shutting down watch...');
                                    return [4 /*yield*/, client.command(['unsubscribe', watch, subscribe])];
                                case 1:
                                    _a.sent();
                                    client.end();
                                    return [2 /*return*/];
                            }
                        });
                    }); };
                    // it doesn't matter what has changed, need to run whole process anyway
                    client.on('subscription', function () {
                        if (!isShutdown) {
                            codegen_1.executeCodegen(config).then(onNext, function () { return Promise.resolve(); });
                        }
                    });
                    process.once('SIGINT', shutdown);
                    process.once('SIGTERM', shutdown);
                    return [2 /*return*/];
            }
        });
    }); };
    // the promise never resolves to keep process running
    return new Promise(function (_, reject) {
        codegen_1.executeCodegen(config)
            .then(onNext, function () { return Promise.resolve(); })
            .then(runWatcher)
            .catch(function (err) {
            client.end();
            reject(err);
        });
    });
};
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