Franz: Suppress opening multiple instances of Franz

[avatarkava]

Feature Description

When attempting to open an instance of Franz, check to see if Franz is already running to prevent opening additional copies.

Motivation and Context

• Unable to think of a use case where multiple instances of Franz being open is desired or beneficial
• Most prevalent when "Minimize Franz to system tray" is toggled on - easy to accidentally open multiple instances
• Additional open copies consume more resources, etc.
• Can cause multiple session issues with some online providers (ala YouTube/Google Play)

[adlk]

I assume you are on Windows?
Also, this happens when you have the app minimized to system tray and click on the taskbar/desktop/start menu icon?

[avatarkava]

Correct on both counts. Admittedly it's mostly user error there :)

[adlk]

That might be true but it shouldn't happen anyway! But I'm ok with you taking the blame 😄

[nsudds]

This happens to me more often because I have the icon pinned to the task bar, for convenience -- but I still want the minimize to tray feature so it keeps the app running even if close with the X so there's no delay next time having to reload from scratch.

Thanks!

[rutgerkra]

The beta.11 has indeed fixed the issue of opening multiple windows, but Franz is not opened when running in the background and a shortcut is clicked. It seems to simply suppress instantiating a new instance but not opens the current instance's window.

[protoEvangelion]

@adlk Reporting that on Ubuntu Linux I have to comment out this line in /src/index.js for the application to start (I have no other instances running):

if (isSecondInstance) {
  console.log("An instance of Franz is already running. Exiting...")
  // app.exit()
}

which was added in this commit: https://github.com/meetfranz/franz/pull/78/commits/2ae409e1f2622b509703ed814d3aa8f4e136d09a

It looks like it is related to this issue: https://github.com/electron/electron/issues/9880

And it seems like it should have been fixed in electron v1.7.8.

Please let me know if you need any other info to help resolve this.