XDG Directories and QStandardPaths

[hmaarrfk]

Comment:

This is a 2-in-1 question:

Qt defines standard interfaces for paths
https://doc.qt.io/qt-6/qstandardpaths.html#details

The code can be found
https://github.com/qt/qtbase/blob/dev/src/corelib/io/qstandardpaths_unix.cpp#L395

However:

1. Conda packages do not install there
2. Therefore, packages that rely on "system" files in those location cannot find them. eg. Theming not quite right qgnomeplatform-feedstock#4

should we:

Option 1

Create an XDG package that sets the environment variables correctly.

• I really don't like adding to the environment variables, but it seems like a good idea....

Option 2

Patch Qt to also include some of the Qt installation directories???

I feel like we almost need both....

[hmaarrfk]

PS. A few other packages struggle with this in their recipes:

• https://github.com/conda-forge/gdk-pixbuf-feedstock/blob/main/recipe/build.sh#L35
• https://github.com/conda-forge/gtk3-feedstock/blob/main/recipe/build.sh#L17
• https://github.com/conda-forge/gtk4-feedstock/blob/main/recipe/build.sh#L7

Other relevant discussions:
conda-forge/conda-forge.github.io#1539