Linux icons issue

• Version: 20.0.4
• Target: deb, AppImage

No matter what I try I cannot set an icon on Linux. Building from a macOS Sierra. I have dir’s customized:

"directories": {
      "buildResources": "./build_res",
      "output": "./build",
      "app": "./dist"
    }

I’ve tried setting

"linux": {
      "icon": "..."
}

to all imaginable values, copying all icon folders to different locations in the root and build_res and I still get a question mark icon in Ubuntu 16.04.

I have an .icns file in ./build_res/icon.icns.

Is there a workaround? Or a fix?

[nukeop]

I can’t set an icon on Linux either, using any of the methods listed in the docs. Implicit conversion from .icns, setting it explicitly as icon.png or 1024x1024.png, or setting buildResources, or providing icon names, or copying the icons to all imaginable locations, all these methods just don’t work. I’m using 20.0.4 now.

[yuya-oc]

Investigation

I investigated with my simplest config.

• Ubuntu: 16.04
• electron-builder: 20.8.2
• app-builder-bin-linux: 1.8.3 (app-builder --version shows 1.8.2)

/home/yuya-oc/git/electron-scaffold
├── build
│   ├── icon.icns
│   ├── icon.ico
│   └── icon.png
├── index.html
├── main.js
└── package.json

electron-builder --config.linux.target=deb --arch=x64

In this case, internally app-builder is executed with following args:

icon --format set --root /home/yuya-oc/git/electron-scaffold/build --root /home/yuya-oc/git/electron-scaffold --out /home/yuya-oc/git/electron-scaffold/dist/.icon-set --input icons --input icon.icns --input /home/yuya-oc/git/electron-builder/packages/electron-builder-lib/templates/linux/electron-icons

Then rawResult indicates the icon size is 0x0.

{"icons":[{"file":"/home/yuya-oc/git/electron-scaffold/build/icon.png","size":0}]}

https://github.com/electron-userland/electron-builder/blob/37014be76e2ea8e5183a68cc4a56ffca31c08df5/packages/electron-builder-lib/src/platformPackager.ts#L609

So the icon.png is included into .deb as /usr/share/icons/hicolor/0x0/apps/${packager.executableName}.png. I think this is the reason why the linux icon did not appear for me. https://github.com/electron-userland/electron-builder/blob/37014be76e2ea8e5183a68cc4a56ffca31c08df5/packages/electron-builder-lib/src/targets/fpm.ts#L204-L206

Workaround

icns

When I remove build/icon.png, dist/.icon-set is correctly generated from build/icon.icns. However we can’t use different icon from macOS.

png

By following the guide, I renamed build/icon.png to build/icons/512.png. The icon is included as /usr/share/icons/hicolor/512x512/apps/${packager.executableName}.png and I can see it on Linux.

Expected

As mentioned at previous comment, need to clarify recommended way and how icon is chosen.