mirror of
https://github.com/node-red/node-red.git
synced 2023-10-10 13:36:53 +02:00
258 lines
8.3 KiB
JavaScript
258 lines
8.3 KiB
JavaScript
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/**
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* Copyright 2014 IBM Corp.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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**/
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var util = require("util");
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var when = require("when");
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var whenNode = require('when/node');
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var fs = require("fs");
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var path = require("path");
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var events = require("../events");
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var Node;
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var settings;
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var node_types = {};
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var node_configs = [];
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function loadTemplate(templateFilename) {
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return when.promise(function(resolve,reject) {
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whenNode.call(fs.readFile,templateFilename,'utf8').done(function(content) {
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typeRegistry.registerConfig(content);
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resolve();
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}, function(err) {
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reject("missing template file");
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});
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});
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}
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function loadNode(nodeDir, nodeFn) {
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return when.promise(function(resolve,reject) {
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if (settings.nodesExcludes) {
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for (var i=0;i<settings.nodesExcludes.length;i++) {
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if (settings.nodesExcludes[i] == nodeFn) {
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resolve();
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return;
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}
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}
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}
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var nodeFilename = path.join(nodeDir,nodeFn);
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var templateFilename = nodeFilename.replace(/\.js$/,".html");
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var r = require(nodeFilename);
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if (typeof r === "function") {
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try {
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var promise = r(RED);
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if (promise != null && typeof promise.then === "function") {
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promise.then(function() {
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resolve(loadTemplate(templateFilename));
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},function(err) {
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reject(err);
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});
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} else {
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resolve(loadTemplate(templateFilename));
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}
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} catch(err) {
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reject(err);
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}
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} else {
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resolve(loadTemplate(templateFilename));
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}
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});
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}
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function loadNodesFromModule(moduleDir,pkg) {
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var nodes = pkg['node-red'].nodes||{};
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var promises = [];
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for (var n in nodes) {
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promises.push(when.promise(function(resolve) {
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loadNode(moduleDir,nodes[n]).then(resolve, function(err) {
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resolve({'fn':pkg.name+":"+n,err:err});
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});
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}));
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}
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return when.promise(function(resolve,reject) {
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var errors = [];
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when.settle(promises).then(function(results) {
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var errors = [];
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results.forEach(function(result) {
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if (result.state == 'fulfilled' && result.value) {
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errors = errors.concat(result.value);
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}
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});
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resolve(errors);
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});
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});
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}
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function scanForNodes(dir) {
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return when.promise(function(resolve,reject) {
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var pm = path.join(dir,"node_modules");
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var promises = [];
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promises.push(when.promise(function(resolve,reject) {
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whenNode.call(fs.readdir,pm).then(function(files) {
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var promises = [];
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files.forEach(function(fn) {
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var pkgfn = path.join(pm,fn,"package.json");
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try {
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var pkg = require(pkgfn);
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if (pkg['node-red']) {
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var moduleDir = path.join(pm,fn);
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promises.push(loadNodesFromModule(moduleDir,pkg));
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}
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} catch(err) {
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if (err.code != "MODULE_NOT_FOUND") {
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// TODO: handle unexpected error
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}
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}
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});
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when.settle(promises).then(function(results) {
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var errors = [];
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results.forEach(function(result) {
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if (result.state == 'fulfilled' && result.value) {
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errors = errors.concat(result.value);
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}
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});
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resolve(errors);
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});
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},function(err) {
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resolve([]);
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})
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}));
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var up = path.resolve(path.join(dir,".."));
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if (up !== dir) {
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promises.push(scanForNodes(up))
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}
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when.settle(promises).then(function(results) {
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var errors = [];
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results.forEach(function(result) {
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if (result.state == 'fulfilled' && result.value) {
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errors = errors.concat(result.value);
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}
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});
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resolve(errors);
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});
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});
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}
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function loadNodes(dir) {
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return when.promise(function(resolve,reject) {
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var promises = [];
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whenNode.call(fs.readdir,dir).done(function(files) {
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files = files.sort();
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files.forEach(function(fn) {
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var stats = fs.statSync(path.join(dir,fn));
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if (stats.isFile()) {
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if (/\.js$/.test(fn)) {
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promises.push(when.promise(function(resolve,reject) {
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loadNode(dir,fn).then(resolve, function(err) {
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resolve({'fn':fn,err:err});
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});
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}));
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}
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} else if (stats.isDirectory()) {
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// Ignore /.dirs/, /lib/ /node_modules/
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if (!/^(\..*|lib|icons|node_modules|test)$/.test(fn)) {
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promises.push(when.promise(function(resolve,reject) {
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loadNodes(path.join(dir,fn)).then(function(errs) {
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resolve(errs);
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});
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}));
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} else if (fn === "icons") {
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events.emit("node-icon-dir",path.join(dir,fn));
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}
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}
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});
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when.settle(promises).then(function(results) {
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var errors = [];
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results.forEach(function(result) {
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if (result.state == 'fulfilled' && result.value) {
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errors = errors.concat(result.value);
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}
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});
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resolve(errors);
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});
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}, function(err) {
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resolve([]);
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// non-existant dir
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});
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});
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}
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function init(_settings) {
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settings = _settings;
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}
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function load() {
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Node = require("./Node");
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return when.promise(function(resolve,reject) {
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var RED = require("../red.js");
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loadNodes(__dirname+"/../../nodes").then(function(errors) {
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var promises = [];
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promises.push(scanForNodes(__dirname+"/../../nodes"));
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if (settings.nodesDir) {
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var dir = settings.nodesDir;
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if (typeof settings.nodesDir == "string") {
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dir = [dir];
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}
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for (var i=0;i<dir.length;i++) {
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promises.push(loadNodes(dir[i]));
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}
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}
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when.settle(promises).then(function(results) {
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results.forEach(function(result) {
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if (result.state == 'fulfilled' && result.value) {
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errors = errors.concat(result.value);
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}
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});
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resolve(errors);
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});
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});
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});
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}
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var typeRegistry = module.exports = {
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init:init,
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load:load,
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registerType: function(type,node) {
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util.inherits(node,Node);
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node_types[type] = node;
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events.emit("type-registered",type);
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},
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registerConfig: function(config) {
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node_configs.push(config);
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},
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get: function(type) {
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return node_types[type];
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},
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getNodeConfigs: function() {
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var result = "";
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for (var i=0;i<node_configs.length;i++) {
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result += node_configs[i];
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}
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return result;
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}
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}
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