Firebase-tools: firebase emulators:start --only functions,hosting not working

[GorvGoyl]

[REQUIRED] Environment info

firebase-tools:
7.12.1

Platform:
win 10

[REQUIRED] Test case

firebase emulators:start --only functions,hosting

[REQUIRED] Steps to reproduce

execute firebase emulators:start --only functions,hosting

[REQUIRED] Expected behavior

both emulators should start

[REQUIRED] Actual behavior

i  emulators: Starting emulators:
!  Not starting the functions hosting emulator, make sure you have run firebase init.
+  All emulators started, it is now safe to connect.

it works if i run functions and hosting emulator seperately

Related SO question https://stackoverflow.com/questions/59774625/not-able-to-exclude-firestore-from-firebase-emulatorsstart/59774650

[bkendall]

Can you provide your firebase.json file? You need either:

1. a hosting key set in the top level (easy, typical), or
2. a emulators.hosting entry (which I'm not confident of the form of that off the top of my head)

[GorvGoyl]

Can you provide your firebase.json file? You need either:

1. a hosting key set in the top level (easy, typical), or
2. a emulators.hosting entry (which I'm not confident of the form of that off the top of my head)

but it works when i run them seperately.

{
  "hosting": {
    "public": "_site",
    "ignore": ["firebase.json", "**/.*", "**/node_modules/**"],
    "rewrites": [
      {
        "source": "/bigben",
        "function": "bigben"
      },
      {
        "source": "**",
        "destination": "/index.html"
      }
    ],
    "cleanUrls": true
  },
  "firestore": {
    "rules": "firestore.rules",
    "indexes": "firestore.indexes.json"
  },
  "functions": {
    "predeploy": [
      "npm --prefix \"$RESOURCE_DIR\" run lint",
      "npm --prefix \"$RESOURCE_DIR\" run build"
    ]
  },
  "emulators": {
    "functions": {
      "port": 5001
    },
    "hosting": {
      "port": 5000
    }
  }
}

[samtstern]

Hmm so this warning is interesting:

!  Not starting the functions hosting emulator, make sure you have run firebase init.

That warning comes from this code in controller.ts:

  if (options.only) {
    const requested: string[] = options.only.split(",");
    const ignored = _.difference(requested, targets);
    for (const name of ignored) {
      utils.logWarning(
        `Not starting the ${clc.bold(name)} emulator, make sure you have run ${clc.bold(
          "firebase init"
        )}.`
      );
    }
  }

It's trying to start an emulator called functions hosting when it should see functions and hosting separately.

[samtstern]

@JerryGoyal can you try running this command and showing the logs:

firebase --debug emulators:start --only functions,hosting

[GorvGoyl]

@samtstern

PS C:\Users\1gour\Github\app> firebase --debug emulators:start --only functions,hosting
[2020-01-26T14:06:42.995Z] ----------------------------------------------------------------------
[2020-01-26T14:06:42.998Z] Command:       C:\Program Files\nodejs\node.exe C:\Users\1gour\AppData\Roaming\npm\node_modules\firebase-tools\lib\bin\firebase.js --debug emulators:start --only functions hosting
[2020-01-26T14:06:42.998Z] CLI Version:   7.12.1
[2020-01-26T14:06:42.999Z] Platform:      win32
[2020-01-26T14:06:42.999Z] Node Version:  v10.16.3
[2020-01-26T14:06:42.999Z] Time:          Sun Jan 26 2020 19:36:42 GMT+0530 (India Standard Time)
[2020-01-26T14:06:43.000Z] ----------------------------------------------------------------------
[2020-01-26T14:06:42.998Z] CLI Version:   7.12.1
[2020-01-26T14:06:42.999Z] Platform:      win32
[2020-01-26T14:06:42.999Z] Node Version:  v10.16.3
[2020-01-26T14:06:42.999Z] Time:          Sun Jan 26 2020 19:36:42 GMT+0530 (India Standard Time)
[2020-01-26T14:06:43.000Z] ----------------------------------------------------------------------
[2020-01-26T14:06:43.000Z]
[2020-01-26T14:06:43.000Z]
[2020-01-26T14:06:43.021Z] > command requires scopes: ["email","openid","https://www.googleapis.com/auth/cloudplatformprojects.readonly","https://www.googleapis.com/auth/firebase","https://www.googleapis.com/auth/cloud-platform"]
[2020-01-26T14:06:43.027Z] > authorizing via signed-in user
i  emulators: Starting emulators:
!  Not starting the functions hosting emulator, make sure you have run firebase init.
+  All emulators started, it is now safe to connect.

[samtstern]

@JerryGoyal hmm what shell are you using on Windows? It seems to be messing up the command parsing:

PS C:\Users\1gour\Github\app> firebase --debug emulators:start --only functions,hosting
[2020-01-26T14:06:42.995Z] ----------------------------------------------------------------------
[2020-01-26T14:06:42.998Z] Command:       C:\Program Files\nodejs\node.exe C:\Users\1gour\AppData\Roaming\npm\node_modules\firebase-tools\lib\bin\firebase.js --debug emulators:start --only functions hosting

You can see the first line says --only functions,hosting but the second line says --only functions hosting. Since we split the argument on commas it thinks you're trying to start the functions hosting emulator for some reason...

[GorvGoyl]

@samtstern I see, that shouldn't be happening.
I am using PowerShell 6.2.3 (https://aka.ms/pscore6-docs) in VSCode.
so, should I file the bug in PS repo?

[samtstern]

@JerryGoyal maybe ... do you have another shell you can try to see if that's part of the issue?

[samtstern]

@JerryGoyal turns out that commas are special in PowerShell:
https://stackoverflow.com/questions/11990688/powershell-is-removing-comma-from-program-argument

So you need to add quotes:

# This WILL NOT work
firebase emulators:start --only functions,hosting

# This will work
firebase emulators:start --only "functions,hosting"

[GorvGoyl]

@samtstern that was exactly the issue with commas. It worked when added the quotes around that. Thanks for the extra efforts to pinpoint the issue and resolution.