Develop Reference

Debug Error with log4js appender when starting npm

When starting npm I am facing an error. The error states that "Error: log4js configuration problem for { type: 'log4js-syslog-appender'," Essentially seems like the format for the log4js config might be wrong. I am a complete newbie to node and would appreciate any pointers on what may be a good next step here.
I have inherited a bunch of code that was written with Node 4.2 and npm 3.x I have had to compile openssl fips binaries and then recompile and reinstall node (6.11.1) and npm with it (3.10.10). I am now simply trying to do npm start and running into an error.
Config.js looks like this for the log4js part:
/*
|--------------------------------------------------
| Logging
|--------------------------------------------------
*/
var log4js = require('log4js');
var use_syslog = process.env.LOG_SYSLOG == "true";
var appenders = [ { type: 'console' } ];
if (use_syslog) {
appenders.push({ type: 'log4js-syslog-appender',
tag: 'API',
facility: 'local0',
path: '/dev/log',
transport: 'socket' });
}
log4js.configure({
appenders: appenders
});
config.logger = use_syslog ? log4js.getLogger('syslog') : log4js.getLogger('console') ;
config.logger.setLevel(process.env.DEBUG_LEVEL);
I would like to find a way to solve this error but cannot figure out what exact change I need to make in the config.js file. If any direction can be provided it'll be great.
The exact error is as below:
==========================================================================
oi#oi01:~/api$ npm start
> oi-api#2.0.0 start /home/oi/api
> babel-node server.js --presets es2015
/home/oi/api/node_modules/log4js/lib/log4js.js:316
throw new Error(
^
Error: Problem reading log4js config { appenders:
[ { type: 'console', makers: [Object] },
{ type: 'log4js-syslog-appender',
tag: 'API',
facility: 'local0',
path: '/dev/log',
transport: 'socket',
makers: [Object] } ] }. Error was "log4js configuration problem for { type: 'log4js-syslog-appender',
tag: 'API',
facility: 'local0',
path: '/dev/log',
transport: 'socket',
makers:
{ console: [Function: bound configure],
'log4js-syslog-appender': [Function: bound configure] } }" (Error: log4js configuration problem for { type: 'log4js-syslog-appender',
tag: 'API',
facility: 'local0',
path: '/dev/log',
transport: 'socket',
makers:
{ console: [Function: bound configure],
'log4js-syslog-appender': [Function: bound configure] } }
at /home/oi/api/node_modules/log4js/lib/log4js.js:256:15
at Array.forEach (native)
at configureAppenders (/home/oi/api/node_modules/log4js/lib/log4js.js:248:18)
at configureOnceOff (/home/oi/api/node_modules/log4js/lib/log4js.js:308:7)
at Object.configure (/home/oi/api/node_modules/log4js/lib/log4js.js:371:3)
at Object.<anonymous> (/home/oi/api/config/config.js:92:8)
at Module._compile (module.js:570:32)
at loader (/home/oi/api/node_modules/babel-register/lib/node.js:144:5)
at Object.require.extensions.(anonymous function) [as .js] (/home/oi/api/node_modules/babel-register/lib/node.js:154:7)
at Module.load (module.js:487:32))
at configureOnceOff (/home/oi/api/node_modules/log4js/lib/log4js.js:316:13)
at Object.configure (/home/oi/api/node_modules/log4js/lib/log4js.js:371:3)
at Object.<anonymous> (/home/oi/api/config/config.js:92:8)
at Module._compile (module.js:570:32)
at loader (/home/oi/api/node_modules/babel-register/lib/node.js:144:5)
at Object.require.extensions.(anonymous function) [as .js] (/home/oi/api/node_modules/babel-register/lib/node.js:154:7)
at Module.load (module.js:487:32)
at tryModuleLoad (module.js:446:12)
at Function.Module._load (module.js:438:3)
at Module.require (module.js:497:17)
npm ERR! Linux 4.4.0-1002-fips
npm ERR! argv "/usr/local/bin/node" "/usr/local/bin/npm" "start"
npm ERR! node v6.11.1
npm ERR! npm v3.10.10
npm ERR! code ELIFECYCLE
npm ERR! oi-api#2.0.0 start: `babel-node server.js --presets es2015`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the oi-api#2.0.0 start script 'babel-node server.js --presets es2015'.
npm ERR! Make sure you have the latest version of node.js and npm installed.
npm ERR! If you do, this is most likely a problem with the oi-api package,
npm ERR! not with npm itself.
npm ERR! Tell the author that this fails on your system:
npm ERR! babel-node server.js --presets es2015
npm ERR! You can get information on how to open an issue for this project with:
npm ERR! npm bugs oi-api
npm ERR! Or if that isn't available, you can get their info via:
npm ERR! npm owner ls oi-api
npm ERR! There is likely additional logging output above.
npm ERR! Please include the following file with any support request:
npm ERR! /home/oi/api/npm-debug.log
===============================================================

sequelize is not defined (nodejs)

I'm new to nodejs, trying to make an API by walking through the guide, but got an issue I can't resolve even with google tho.
Here's my command line text.
consign v0.1.2 Initialized in d:\Jinn\API
+ .\libs\config.js
+ .\db.js
+ .\libs\middlewares.js
+ .\routes\index.js
+ .\routes\tasks.js
+ .\libs\boot.js
d:\Jinn\API\db.js:22
sequelize = new _sequelize2.default(config.database, config.username, config
.password, config.params);
^
ReferenceError: sequelize is not defined
at Function.module.exports (d:/Jinn/API/db.js:10:5)
at Consign.into (d:\Jinn\API\node_modules\consign\lib\consign.js:239
:17)
at Object.<anonymous> (d:/Jinn/API/index.js:13:4)
at Module._compile (module.js:570:32)
at loader (d:\Jinn\API\node_modules\babel-register\lib\node.js:144:5
)
at Object.require.extensions.(anonymous function) [as .js] (d:\Jinn\API\node_modules\babel-register\lib\node.js:154:7)
at Module.load (module.js:487:32)
at tryModuleLoad (module.js:446:12)
at Function.Module._load (module.js:438:3)
at Function.Module.runMain (module.js:604:10)
at d:\Jinn\API\node_modules\babel-cli\lib\_babel-node.js:161:27
at Object.<anonymous> (d:\Jinn\API\node_modules\babel-cli\lib\_babel
-node.js:162:7)
at Module._compile (module.js:570:32)
at Object.Module._extensions..js (module.js:579:10)
at Module.load (module.js:487:32)
at tryModuleLoad (module.js:446:12)
npm ERR! Windows_NT 6.3.9600
npm ERR! argv "C:\\Program Files\\nodejs\\node.exe" "C:\\Program Files\\nodejs\\
node_modules\\npm\\bin\\npm-cli.js" "start"
npm ERR! node v6.11.2
npm ERR! npm v3.10.10
npm ERR! code ELIFECYCLE
npm ERR! api#1.0.0 start: `babel-node index.js`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the api#1.0.0 start script 'babel-node index.js'.
npm ERR! Make sure you have the latest version of node.js and npm installed.
npm ERR! If you do, this is most likely a problem with the bitskinsapi package,
npm ERR! not with npm itself.
npm ERR! Tell the author that this fails on your system:
npm ERR! babel-node index.js
npm ERR! You can get information on how to open an issue for this project with:
npm ERR! npm bugs api
npm ERR! Or if that isn't available, you can get their info via:
npm ERR! npm owner ls api
npm ERR! There is likely additional logging output above.
npm ERR! Please include the following file with any support request:
npm ERR! d:\Jinn\API\npm-debug.log
Seems that troubles are somewhere in db.js file so here is the code of it:
import fs from "fs";
import path from "path";
import Sequelize from "sequelize";
let db = null;
module.exports = app => {
if (!db) {
const config = app.libs.config;
sequelize = new Sequelize(
config.database,
config.username,
config.password,
config.params
);
db = {
sequelize,
Sequelize,
models: {}
};
// Загрузка моделей
const dir = path.join(__dirname, "models");
fs.readdirSync(dir).forEach(file => {
const modelDir = path.join(dir, file);
const model = sequelize.import(modelDir);
db.models[model.name] = model;
});
Object.keys(db.models).forEach(key => {
db.models[key].associate(db.models);
});
}
return db;
};
To tell the truth I mostly followed instructions and copy-pasted code fragments that's why I'm frustrated because it should work. Any thoughts?

npm start gives Error: `output.path` needs to be an absolute path or `/`

When i run my first react app using npm start command some error is displayed. Please some one help me to resolve this issue.­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­
C:\Users\ankit\Desktop\r3\node_modules\webpack-dev-server\bin\webpack-dev-server.js:386
throw e;
^
Error: `output.path` needs to be an absolute path or `/`.
at Object.setFs (C:\Users\ankit\Desktop\r3\node_modules\webpack-dev-middleware\lib\Shared.js:88:11)
at Shared (C:\Users\ankit\Desktop\r3\node_modules\webpack-dev-middleware\lib\Shared.js:214:8)
at module.exports (C:\Users\ankit\Desktop\r3\node_modules\webpack-dev-middleware\middleware.js:22:15)
at new Server (C:\Users\ankit\Desktop\r3\node_modules\webpack-dev-server\lib\Server.js:56:20)
at startDevServer (C:\Users\ankit\Desktop\r3\node_modules\webpack-dev-server\bin\webpack-dev-server.js:379:12)
at processOptions (C:\Users\ankit\Desktop\r3\node_modules\webpack-dev-server\bin\webpack-dev-server.js:317:3)
at Object.<anonymous> (C:\Users\ankit\Desktop\r3\node_modules\webpack-dev-server\bin\webpack-dev-server.js:441:1)
at Module._compile (module.js:571:32)
at Object.Module._extensions..js (module.js:580:10)
at Module.load (module.js:488:32)
npm ERR! Windows_NT 6.2.9200
npm ERR! argv "C:\\Program Files\\nodejs\\node.exe" "C:\\Program Files\\nodejs\\node_modules\\npm\\bin\\npm-cli.js" "start"
npm ERR! node v7.5.0
npm ERR! npm v4.1.2
npm ERR! code ELIFECYCLE
npm ERR! r3#1.0.0 start: `webpack-dev-server`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the r3#1.0.0 start script 'webpack-dev-server'.
npm ERR! Make sure you have the latest version of node.js and npm installed.
npm ERR! If you do, this is most likely a problem with the r3 package,
npm ERR! not with npm itself.
npm ERR! Tell the author that this fails on your system:
npm ERR! webpack-dev-server
npm ERR! You can get information on how to open an issue for this project with:
npm ERR! npm bugs r3
npm ERR! Or if that isn't available, you can get their info via:
npm ERR! npm owner ls r3
npm ERR! There is likely additional logging output above.
npm ERR! Please include the following file with any support request:
npm ERR! C:\Users\ankit\Desktop\r3\npm-debug.log

The error message is clear： output.path needs to be an absolute path or /
Your output.path should write like this：
var path = require('path');
output: {
path: path.join( __dirname, './dist/'),
}

Error when running "npm start"?

I have started with electron today and followed a guide to create a simple application browser window and I ran npm start in the command window and it displayed a lot of errors after I had entered it, I have posted the information below and my code.
Console error:
C:\Users\Administrator\Desktop\electron>npm start
> breef#1.0.0 start C:\Users\Administrator\Desktop\electron
> node index.js
module.js:471
throw err;
^
Error: Cannot find module 'app'
at Function.Module._resolveFilename (module.js:469:15)
at Function.Module._load (module.js:417:25)
at Module.require (module.js:497:17)
at require (internal/module.js:20:19)
at Object.<anonymous> (C:\Users\Administrator\Desktop\electron\index.js:1:73)
at Module._compile (module.js:570:32)
at Object.Module._extensions..js (module.js:579:10)
at Module.load (module.js:487:32)
at tryModuleLoad (module.js:446:12)
at Function.Module._load (module.js:438:3)
npm ERR! Windows_NT 10.0.14393
npm ERR! argv "C:\\Program Files\\nodejs\\node.exe" "C:\\Program Files\\nodejs\\node_modules\\npm\\bin\\npm-cli.js" "start"
npm ERR! node v6.9.2
npm ERR! npm v3.10.9
npm ERR! code ELIFECYCLE
npm ERR! breef#1.0.0 start: `node index.js`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the breef#1.0.0 start script 'node index.js'.
npm ERR! Make sure you have the latest version of node.js and npm installed.
npm ERR! If you do, this is most likely a problem with the breef package,
npm ERR! not with npm itself.
npm ERR! Tell the author that this fails on your system:
npm ERR! node index.js
npm ERR! You can get information on how to open an issue for this project with:
npm ERR! npm bugs breef
npm ERR! Or if that isn't available, you can get their info via:
npm ERR! npm owner ls breef
npm ERR! There is likely additional logging output above.
npm ERR! Please include the following file with any support request:
npm ERR! C:\Users\Administrator\Desktop\electron\npm-debug.log
Here is my package.json:
{
"name": "breef",
"version": "1.0.0",
"description": "A simple chat application.",
"main": "index.js",
"dependencies": {
"electron": "^1.4.12"
},
"devDependencies": {},
"scripts": {
"test": "breeftestcmd",
"start": "node index.js"
},
"keywords": [
"breef"
],
"author": "Sage & Sh4wn",
"license": "ISC"
}
Here is my index.js:
var app = require("app")
var browserWindow = require("browser-window")
app.on('ready', function() {
var mainWindow = new browserWindow({
width: 800,
height: 600
})
mainWindow.loadUrl('http://google.com');
})

If app is a module, it's missing in your package.json. If not, you should use a path to require it
var app = require('./app');

The guide you followed is out of date, as of Electron v1.0.0 the way built-in Electron modules are imported has changed. This is the correct way:
const {app, BrowserWindow} = require("electron")
You may also find it beneficial to read the previous question that covered this topic: What's the proper way to require in Node.js?

Import using absolute path using Webpack and Electron

I am trying to import a file with an absolute path into my main electron thread.
Import code in the main electron thread:
import * as Test2 from 'app/main/tray.js';
I have added the resolve.root to the webpack.config:
{
module: {
loaders: [{
test: /\.jsx?$/,
loaders: ['babel-loader'],
exclude: /node_modules/,
}, {
test: /\.json$/,
loader: 'json-loader',
}],
},
output: {
path: path.join(__dirname, 'dist'),
filename: '[name]/index.js',
libraryTarget: 'commonjs2',
},
resolve: {
root: [
path.resolve('./')
],
extensions: ['', '.js', '.jsx'],
packageMains: ['webpack', 'browser', 'web', 'browserify', ['jam', 'main'], 'main'],
},
plugins: [
],
externals: [
// put your node 3rd party libraries which can't be built with webpack here
// (mysql, mongodb, and so on..)
],
};
No errors are thrown when I run the webpack server (webpack finds the files just fine) but an error is thrown when I run electron.
App threw an error during load
Error: Cannot find module 'app/main/tray.js'
at Module._resolveFilename (module.js:440:15)
at Function.Module._resolveFilename (C:\Git\stemn-electron-2\node_modules\electron-prebuilt\dist\resources\electron.asar\common\reset-search-paths.js:35:12)
at Function.Module._load (module.js:388:25)
at Module.require (module.js:468:17)
at require (internal/module.js:20:19)
at Object.<anonymous> (index.js:22:15)
at Module._compile (module.js:541:32)
at loader (C:\Git\stemn-electron-2\node_modules\babel-register\lib\node.js:158:5)
at Object.require.extensions.(anonymous function) [as .js] (C:\Git\stemn-electron-2\node_modules\babel-register\lib\node.js:168:7)
at Module.load (module.js:458:32)
at tryModuleLoad (module.js:417:12)
at Function.Module._load (module.js:409:3)
at loadApplicationPackage (C:\Git\stemn-electron-2\node_modules\electron-prebuilt\dist\resources\default_app.asar\main.js:288:12)
at Object.<anonymous> (C:\Git\stemn-electron-2\node_modules\electron-prebuilt\dist\resources\default_app.asar\main.js:330:5)
at Module._compile (module.js:541:32)
at Object.Module._extensions..js (module.js:550:10)
npm ERR! Windows_NT 10.0.10586
npm ERR! argv "C:\\Program Files\\nodejs\\node.exe" "C:\\Users\\david\\AppData\\Roaming\\npm\\node_modules\\npm\\bin\\npm-cli.js" "run" "start-hot"
npm ERR! node v6.2.1
npm ERR! npm v3.10.6
npm ERR! code ELIFECYCLE
npm ERR! STEMN#0.0.1 start-hot: `cross-env HOT=1 NODE_ENV=development electron -r babel-register -r babel-polyfill ./app/main/index`
npm ERR! Exit status 7
npm ERR!
npm ERR! Failed at the STEMN#0.0.1 start-hot script 'cross-env HOT=1 NODE_ENV=development electron -r babel-register -r babel-polyfill ./app/main/index'.
npm ERR! Make sure you have the latest version of node.js and npm installed.
npm ERR! If you do, this is most likely a problem with the STEMN package,
npm ERR! not with npm itself.
npm ERR! Tell the author that this fails on your system:
npm ERR! cross-env HOT=1 NODE_ENV=development electron -r babel-register -r babel-polyfill ./app/main/index
npm ERR! You can get information on how to open an issue for this project with:
npm ERR! npm bugs STEMN
npm ERR! Or if that isn't available, you can get their info via:
npm ERR! npm owner ls STEMN
npm ERR! There is likely additional logging output above.
npm ERR! Please include the following file with any support request:
npm ERR! C:\Git\stemn-electron-2\npm-debug.log
It looks like electron is changing the webpack import behavior? These files are imported properly in the renderer windows, just not the main thread...

Have you tried this:
root: [
path.resolve(__dirname)
]

My issue was the I was using webpack to build the electron renderers but not using webpack to build the electron main-thread.
I added a new webpack.config specifically for the main thread - now I can use webpack.root (but all the code must compile now which is a bit of a shame...)