fix(linux): Improve detection of Gnome environment

[ermshiperete]

This change improves the way we detect if we're running a Gnome based UI that needs it's keyboards installed under org.gnome.desktop.input-sources. We use the environment variable XDG_CURRENT_DESKTOP and check if it contains the word gnome. Additionally this change renames is_gnome_shell() to is_gnome_desktop().

Fixes #11225.

User Testing

Preparations

• The tests should be run on these Linux platforms:

  • GROUP_FOCAL: Ubuntu 20.04 Focal with Gnome Shell and X11
  • GROUP_NOBLE_WAYLAND: Ubuntu 24.04 Noble with Gnome Shell and Wayland
  • GROUP_WASTA: Wasta 22.04 with Cinnamon

• Install build artifacts of this PR

• Reboot

Tests

TEST_INSTALL:

• open Keyman Configuration
• install a Keyman keyboard
• verify that the keyboard appears in Keyboard/language dropdown list in the task bar

[keymanapp-test-bot[bot]]

User Test Results

Test specification and instructions

• ✅ GROUP_FOCAL: Ubuntu 20.04 Focal with Gnome Shell and X11

  1 tests PASSED

  - ✅ **TEST_INSTALL ([PASSED](https://github.com/keymanapp/keyman/pull/11292#issuecomment-2077246746))**: 1. Tested with the attached PR build (Keyman 18.0.21-alpha (package version 18.0.21-1~PR-11292-2776.1+focal1) on Ubuntu Focal 20.04 Linux OS (VM) and here is my observation: 1. Opened Keyman Configuration. 2. Installed the Keyman Keyboard. 3. Verified that the installed keyboard appeared on the Keyboard / language dropdown list in the task bar. ([notes](https://github.com/keymanapp/keyman/pull/11292#issuecomment-2077246746))

• ✅ GROUP_NOBLE_WAYLAND: Ubuntu 24.04 Noble with Gnome Shell and Wayland

  1 tests PASSED

  - ✅ **TEST_INSTALL ([PASSED](https://github.com/keymanapp/keyman/pull/11292#issuecomment-2085377546))**: 1. Tested with the attached PR build (Keyman 18.0.21-alpha (package version 18.0.21-1~PR-11292-2776.1+noble1) on Ubuntu Noble 24.04 Linux OS (VM) and here is my observation: 1. Opened Keyman Configuration. 2. Installed the Keyman Keyboard. 3. Verified that the installed keyboard appeared on the Keyboard/language dropdown list in the taskbar. ([notes](https://github.com/keymanapp/keyman/pull/11292#issuecomment-2085377546))

• ✅ GROUP_WASTA: Wasta 22.04 with Cinnamon

  1 tests PASSED

  - ✅ **TEST_INSTALL ([PASSED](https://github.com/keymanapp/keyman/pull/11292#issuecomment-2077359999))**: 1. Tested with the attached PR build (Keyman 18.0.21-alpha (package version 18.0.21-1~PR-11292-2776.1+focal1) on Wasta 22.04 with Cinnamon Linux OS (VM) and here is my observation: 1. Opened Keyman Configuration. 2. Installed the Keyman Keyboard. 3. Verified that the installed keyboard appeared on the Keyboard/language dropdown list in the taskbar.

Test Artifacts

• Linux
  • Keyman for Linux: focal
  • Keyman for Linux: jammy
  • Keyman for Linux: mantic
  • Keyman for Linux: noble

[bharanidharanj]

Test Results

GROUP_FOCAL: Ubuntu 20.04 Focal with Gnome Shell and X11

• TEST_INSTALL (PASSED): 1. Tested with the attached PR build (Keyman 18.0.21-alpha (package version 18.0.21-1~PR-11292-2776.1+focal1) on Ubuntu Focal 20.04 Linux OS (VM) and here is my observation: 1. Opened Keyman Configuration. 2. Installed the Keyman Keyboard. 3. Verified that the installed keyboard appeared on the Keyboard / language dropdown list in the task bar.

  

[bharanidharanj]

Test Results

GROUP_NOBLE_WAYLAND: Ubuntu 24.04 Noble with Gnome Shell and Wayland

• TEST_INSTALL (BLOCKED): 1. Got an error message while installed the attached PR build on Ubuntu Noble_Wayland Linux OS. 2. This error prevents further testing on this test.

  

[bharanidharanj]

Test Results

GROUP_WASTA: Wasta 22.04 with Cinnamon

• TEST_INSTALL (PASSED): 1. Tested with the attached PR build (Keyman 18.0.21-alpha (package version 18.0.21-1~PR-11292-2776.1+focal1) on Wasta 22.04 with Cinnamon Linux OS (VM) and here is my observation: 1. Opened Keyman Configuration. 2. Installed the Keyman Keyboard. 3. Verified that the installed keyboard appeared on the Keyboard/language dropdown list in the taskbar.

[ermshiperete]

@bharanidharanj Please run:

sudo apt update
sudo apt upgrade
sudo apt dist-upgrade

then try the installation again.

@keymanapp-test-bot retest GROUP_NOBLE_WAYLAND TEST_INSTALL

[bharanidharanj]

Test Results

GROUP_NOBLE_WAYLAND: Ubuntu 24.04 Noble with Gnome Shell and Wayland

• TEST_INSTALL (PASSED): 1. Tested with the attached PR build (Keyman 18.0.21-alpha (package version 18.0.21-1~PR-11292-2776.1+noble1) on Ubuntu Noble 24.04 Linux OS (VM) and here is my observation: 1. Opened Keyman Configuration. 2. Installed the Keyman Keyboard. 3. Verified that the installed keyboard appeared on the Keyboard/language dropdown list in the taskbar.

  

[keyman-server]

Changes in this pull request will be available for download in Keyman version 18.0.25-alpha