tauri::generate_context!() complains about missing icons

[WhyNotHugo]

I'm starting work on a new project, but I'm stuck very early in the build stage.

Basically, my build fails with:

error: proc macro panicked
  --> src/main.rs:27:14
   |
27 |         .run(tauri::generate_context!())
   |              ^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = help: message: failed to open icon /home/hugo/src/git.sr.ht/~whynothugo/pocketmail/backend/icons/icon.png: No such file or directory (os error 2)

But my tauri.conf.json doesn't specify any icons:

  "bundle": {
    "icon": []
  }

I don't have any icons. I'm very early in the development phase, there is no artwork, but I also don't care about this at this time. I won't be shipping to any platform where icons are mandatory, and it working on something like this is a complete distraction at this time.

How do I stop tauri from trying to use icons/icon.png?

[FabianLars]

How do I stop tauri from trying to use icons/icon.png?

You currently can't. You're honestly the first one to ever complain about that (probably because there are default icons) so we never thought about this.

[FabianLars]

I honestly don't understand why Tauri is even trying to parse icons at this stage; I'm trying to compile a program which renders a window. An icon is not required for this.

Even if optional on an OS level Tauri tries to set a window icon and whoever implemented it didn't expect your situation (i assume because of the default icons in our templates).

They're not being used; Tauri is trying to read some inexistent file instead.

Yeah not internally but when you create the app via create-tauri-app or tauri init it will come with default icons. Did you create your app in another way? If so, how.

[WhyNotHugo]

Maybe I'm an outlier for your typical audience: I'm working solo on a project and want to write a proof of concept at this time. I don't have team working by my side and definitely don't have designer with me to produce artwork for me. Even if I did, I'd have them focus on some finished project.

That having an icon is a blocker for even rendering a window really inverts priorities: I'd have to focus on public relations before I've even written code that compiles?

Maybe I'm hitting a bug where this "default icon" is not being picked up by default.

[WhyNotHugo]

Even if optional on an OS level Tauri tries to set a window icon

You mean that Tauri will set an icon via xdg-toplevel-icon-v1?

If that were the case, it would be ideal if the icon can be specified at runtime, since the icon can be changed at any time by a client.

whoever implemented it didn't expect your situation (i assume because of the default icons in our templates).

I guess that the problem in this case is the default icons are not being used, and also, when I explicitly specify "no icons", it's still trying to use the inexistent icons.

[WhyNotHugo]

Look like the issue is that Tauri uses a Vec<String> for icons, and can't distinguish between "icon setting not defined" and "icon setting defined as empty list".

Replacing that with Option<Vec<String>> should cover this. I'll try and produce a patch.

[Legend-Master]

To be fair, I have had this problem before when setting up test projects, but I assumed that the icon was required and just copied in the icons in the tauri repo manually

Will check if that's the case, if it's not required, we would definitely want to allow that to compile 🙃

The documentation around this is kinda bad though (the schema just says The app's icons 😂, and the doc https://v2.tauri.app/develop/icons/ isn't clear about this either), it's not obvious where are the icons defined here are being used, like they're being used in all sorts of different places, and the order and staff actually matters, ...

[WhyNotHugo]

I tried putting an empty file there, but it looks like Tauri tries to parse the icons anyway. This is a red herring for me, since it's completely unrelated to what I'm trying to do.