fix(linux): Fix app icon not showing on Gnome+Wayland (#5258)

[martpie]

closes #5258

Spinned off a Fedora VM to test Museeks, and realized the icon would never show in dock, nor the installer. Modern Fedora uses Wayland. This also applied to Ubuntu. Forcing x11 shown the correct icon.

For whatever reasons, setting StartupWMClass to the name of the app fixes it. See the discussion linked above. I don't know if this is just Gnome, or Freedesktop or whatever, but this fixes it.

Before:

After:

Icon is still not showing on installer:

but is showing correctly in dock + grid view:

I tested that locally with a local template, I know, not perfect. If I can test it using the real tauri repo.

[martpie]

mmmh I cannot reproduce the fix on the official repo with the hello world example:

cargo install --path . # from crates/tauri-bundler
cd ../..
cargo run --example helloworld

What am I doing wrong?

[FabianLars]

cargo run --example helloworld doesn't use tauri's cli/bundler. To test what you installed with cargo install --path . you need to run cargo tauri build (if you want with the --debug flag). That doesn't work with the helloworld example though. The api example should work.

[github-actions]

Package Changes Through d306eff

There are 8 changes which include tauri-bundler with minor, tauri-cli with minor, tauri-codegen with minor, tauri-utils with minor, @tauri-apps/cli with minor, tauri with minor, @tauri-apps/api with minor, tauri-runtime-wry with patch

Planned Package Versions

The following package releases are the planned based on the context of changes in this pull request.

package	current	next
@tauri-apps/api	2.5.0	2.6.0
tauri-utils	2.4.0	2.5.0
tauri-bundler	2.4.0	2.5.0
tauri-runtime	2.6.0	2.6.1
tauri-runtime-wry	2.6.0	2.6.1
tauri-codegen	2.2.0	2.3.0
tauri-macros	2.2.0	2.2.1
tauri-plugin	2.2.0	2.2.1
tauri-build	2.2.0	2.2.1
tauri	2.5.1	2.6.0
@tauri-apps/cli	2.5.0	2.6.0
tauri-cli	2.5.0	2.6.0

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[FabianLars]

this has a very slim chance that its side effect is unwanted but in that case the dev can provide a custom template. anyway, thanks for the PR!