Add a basic build workflow to the repository.

.github/workflows/build.yaml

@@ -0,0 +1,42 @@
+name: Build OSM
+
+on:
+  pull_request:
+    branches: [ master ]
+  workflow_dispatch:
+
+jobs:
+  build:
+    strategy:
+      matrix:
+        os:
+          - ubuntu-22.04
+          - ubuntu-24.04
+        arch:
+          - ""
+          - "-arm"
+
+    runs-on: ${{ matrix.os }}${{ matrix.arch }}
+
+    steps:
+      - name: Checkout the repository on the runner
+        uses: actions/checkout@v4
+
+      - name: Install dependencies
+        run: |
+          sudo apt update
+          sudo apt -y upgrade
+          sudo apt -y install build-essential qt5-qmake-bin qt5-qmake libqt5opengl5-dev \
+            qtbase5-dev libqt5opengl5-dev qtquickcontrols2-5-dev qtdeclarative5-dev \
+            libasound2-dev
+
+      - name: Configure the tree with qmake
+        run: |
+          mkdir -p _build
+          cd _build
+          qmake OSM_BUILD_APPIMAGE=false ..
+          cd ..
+
+      - name: Build the source
+        run: make -C _build -j4
+

OpenSoundMeter.pro

@@ -7,6 +7,12 @@ CONFIG += qmltypes
 QML_IMPORT_NAME = OpenSoundMeterModule
 QML_IMPORT_MAJOR_VERSION = 1
 
+# Set this to false in the qmake command to avoid building
+# the appimage. Useful for Github workflows and Debian packaging.
+!defined(OSM_BUILD_APPIMAGE, var) {
+  OSM_BUILD_APPIMAGE = true
+}
+
 SOURCES += src/main.cpp \
     src/abstract/data.cpp \
     src/abstract/levelsdata.cpp \
@@ -522,7 +528,7 @@ isEqual(GRAPH, "OPENGL") {
 #}
 
 # Special rules for deployment on Linux for AppImage
-unix:!macx:!ios:CONFIG(release, debug|release) {
+unix:!macx:!ios:CONFIG(release, debug|release):equals(OSM_BUILD_APPIMAGE, "true") {
     QMAKE_POST_LINK += $$QMAKE_COPY $$PWD/OpenSoundMeter.desktop $$OUT_PWD/OpenSoundMeter_\\"$$APP_GIT_VERSION\\".desktop
     QMAKE_POST_LINK += && $$QMAKE_COPY $$PWD/icons/white.png $$OUT_PWD
     QMAKE_POST_LINK += && $$QMAKE_COPY $$PWD/linuxdeployosm.sh $$OUT_PWD