Cannot read property 'commandLine' of undefined

[zeke]

https://github.com/Jam3/devtool/blob/dab319eef616f995d3c6d497c4afee2ae891cf54/server.js#L20

❯ node -v 
v6.2.0

❯ npm i -g devtool
/usr/local/bin/devtool -> /usr/local/lib/node_modules/devtool/bin/index.js
/usr/local/lib
└── devtool@1.11.2 

❯ devtool
App threw an error when running [TypeError: Cannot read property 'commandLine' of undefined]
/usr/local/lib/node_modules/devtool/node_modules/electron-prebuilt/dist/Electron.app/Contents/Resources/default_app.asar/main.js:267
      throw e
      ^

TypeError: Cannot read property 'commandLine' of undefined
    at Object.<anonymous> (/usr/local/lib/node_modules/devtool/server.js:20:4)
    at Module._compile (module.js:413:34)
    at Object.Module._extensions..js (module.js:422:10)
    at Module.load (module.js:357:32)
    at Function.Module._load (module.js:314:12)
    at loadApplicationPackage (/usr/local/lib/node_modules/devtool/node_modules/electron-prebuilt/dist/Electron.app/Contents/Resources/default_app.asar/main.js:253:23)
    at Object.<anonymous> (/usr/local/lib/node_modules/devtool/node_modules/electron-prebuilt/dist/Electron.app/Contents/Resources/default_app.asar/main.js:293:5)
    at Module._compile (module.js:413:34)
    at Object.Module._extensions..js (module.js:422:10)
    at Module.load (module.js:357:32)

[mattdesl]

Hmm probably Electron APIs have changed. The package json here should maybe just lock to a specific version of electron.

[mattdesl]

I just used nvm install 6.2 with npm@3.8.9 and npm install devtool -g, can't seem to reproduce this. What OS?

[PaulBGD]

Running on mac with node v6.2 and npm v3.8.9 and I get the same error.

App threw an error when running TypeError: Cannot read property 'commandLine' of undefined
    at Object.<anonymous> (/usr/local/lib/node_modules/devtool/server.js:20:4)
    at Module._compile (module.js:541:32)
    at Object.Module._extensions..js (module.js:550:10)
    at Module.load (module.js:456:32)
    at tryModuleLoad (module.js:415:12)
    at Function.Module._load (module.js:407:3)
    at loadApplicationPackage (/usr/local/lib/node_modules/devtool/node_modules/electron-prebuilt/dist/Electron.app/Contents/Resources/default_app.asar/main.js:252:23)
    at Object.<anonymous> (/usr/local/lib/node_modules/devtool/node_modules/electron-prebuilt/dist/Electron.app/Contents/Resources/default_app.asar/main.js:292:5)
    at Module._compile (module.js:541:32)
    at Object.Module._extensions..js (module.js:550:10)
/usr/local/lib/node_modules/devtool/node_modules/electron-prebuilt/dist/Electron.app/Contents/Resources/default_app.asar/main.js:266
      throw e
      ^

TypeError: Cannot read property 'commandLine' of undefined
    at Object.<anonymous> (/usr/local/lib/node_modules/devtool/server.js:20:4)
    at Module._compile (module.js:541:32)
    at Object.Module._extensions..js (module.js:550:10)
    at Module.load (module.js:456:32)
    at tryModuleLoad (module.js:415:12)
    at Function.Module._load (module.js:407:3)
    at loadApplicationPackage (/usr/local/lib/node_modules/devtool/node_modules/electron-prebuilt/dist/Electron.app/Contents/Resources/default_app.asar/main.js:252:23)
    at Object.<anonymous> (/usr/local/lib/node_modules/devtool/node_modules/electron-prebuilt/dist/Electron.app/Contents/Resources/default_app.asar/main.js:292:5)
    at Module._compile (module.js:541:32)
    at Object.Module._extensions..js (module.js:550:10)

[zeke]

OS X 10.11.4 El Capitan

[mattdesl]

Hmm, have you guys tried devtool@2.0.1? I am on the same setup as you but I can't reproduce with npm i devtool -g.

[Synvox]

I was getting the same error this morning. I think I've pinned down the problem, and it isn't a problem with devtool or electron. It happens when electron is installed globally, so remove it and install devtool again.

Here's what I did and it's up and running.

npm remove electron -g
npm remove devtool -g
npm install devtool -g

[mattdesl]

I think it's because of the electron module which some devs have accidentally installed globally (thinking it is related to Atom's Electron). It seems like Electron should guard against this somehow.

[zeke]

That was it! Cheers.