Build Ubuntu packages with the unix folder layout, search config in /usr/share/${PROJECT_NAME}

Author: tstenner

.github/workflows/cppcmake.yml

@@ -30,7 +30,7 @@ jobs:
       matrix:
         config:
         - name: "ubuntu-22.04"
-          os: "ubuntu-latest"
+          os: "ubuntu-22.04"
         - name: "ubuntu-20.04"
           os: "ubuntu-20.04"
         - name: "ubuntu-18.04"
@@ -51,7 +51,7 @@ jobs:
         - name: "macOS-10"
           os: "macos-10.15"
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3
 
     - name: Install liblsl (Ubuntu)
       if: startsWith(matrix.config.os, 'ubuntu-')
@@ -72,7 +72,7 @@ jobs:
 
     - name: Install Qt (Window and Ubuntu bionic)
       if: (matrix.config.os == 'windows-latest') || (matrix.config.os == 'ubuntu-18.04')
-      uses: jurplel/install-qt-action@v2.14.0
+      uses: jurplel/install-qt-action@v3.0.0
       with:
          version: ${{ matrix.config.qt_ver }}
          arch: ${{ matrix.config.qt_arch }}
@@ -99,6 +99,9 @@ jobs:
                 -DLSL_INSTALL_ROOT=$PWD/LSL/ \
                 -DCPACK_DEBIAN_PACKAGE_SHLIBDEPS=ON \
                 ${{ matrix.config.cmake_extra }}
+           if [[ "${{ matrix.config.name }}" = ubuntu-* ]]; then
+               cmake -DLSL_UNIXFOLDERS=ON build
+           fi
 
     - name: make
       run: cmake --build build --config Release -j --target install
@@ -110,7 +113,7 @@ jobs:
            cmake -E remove_directory package/_CPack_Packages
 
     - name: Upload Artifacts
-      uses: actions/upload-artifact@v2
+      uses: actions/upload-artifact@v3
       with:
         name: pkg-${{ matrix.config.name }}
         path: package

src/mainwindow.cpp

@@ -585,9 +585,12 @@ QString MainWindow::find_config_file(const char *filename) {
 	qInfo() << defaultCfgFilename;
 	QStringList cfgpaths;
 	cfgpaths << QDir::currentPath()
-			 << QStandardPaths::standardLocations(QStandardPaths::ConfigLocation) << exeInfo.path();
+			 << QStandardPaths::standardLocations(QStandardPaths::AppConfigLocation)
+			 << QStandardPaths::standardLocations(QStandardPaths::AppDataLocation)
+			 << exeInfo.path();
 	for (const auto &path : qAsConst(cfgpaths)) {
 		QString cfgfilepath = path + QDir::separator() + defaultCfgFilename;
+		qInfo() << cfgfilepath;
 		if (QFileInfo::exists(cfgfilepath)) return cfgfilepath;
 	}
 	QMessageBox::warning(this, "No config file not found",