build: add linuxbuild.sh to generate an AppImage file for portable distribution

.github/workflows/linuxbuild.yml

@@ -0,0 +1,38 @@
+name: Linux CI
+
+on:
+  push:
+    branches:
+      - '*'
+  pull_request:
+    branches:
+      - '*'
+
+jobs:
+  build:
+    runs-on: ubuntu-22.04
+
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v4
+      with:
+        fetch-depth: 0
+
+    - name: Set up Python
+      uses: actions/setup-python@v5
+      with:
+        python-version: '3.10'
+
+    - name: Install dependencies
+      run: |
+        sudo apt-get update
+        sudo apt-get install -y fuse file
+
+    - name: Build Linux AppImage
+      run: bash linuxbuild.sh
+
+    - name: Upload build artifacts
+      uses: actions/upload-artifact@v4
+      with:
+        name: AppImage Package
+        path: dist/*.AppImage

.gitignore

@@ -65,3 +65,7 @@ target/
 .idea/
 
 venv/
+
+# AppImage build
+AppDir/
+appimagetool-x86_64.AppImage

linuxbuild.sh

@@ -0,0 +1,76 @@
+#!/bin/bash
+# Linux AppImage build script for DroneCAN GUI Tool
+# Produces an AppImage in the dist/ folder.
+
+set -e
+
+# Note: If APPIMAGETOOL_RELEASE is updated to a newer version, you MUST also
+# update APPIMAGETOOL_SHA256 to match the checksum of the new binary.
+APPIMAGETOOL_RELEASE="1.9.1"
+APPIMAGETOOL_SHA256="ed4ce84f0d9caff66f50bcca6ff6f35aae54ce8135408b3fa33abfc3cb384eb0"
+
+echo "Building DroneCAN GUI Tool AppImage..."
+
+python3 --version
+
+# Create and activate a clean virtual environment
+python3 -m venv --clear venv
+source venv/bin/activate
+
+# Install pyinstaller and other dependencies
+python3 -m pip install -U pip pyinstaller
+python3 -m pip install -U pymavlink
+python3 -m pip install -U python-can
+python3 -m pip install -U .
+
+# Clean previous build artifacts
+rm -rf build dist/DroneCAN_GUI_Tool dist/*.AppImage AppDir
+
+# Build the binary folder with PyInstaller
+echo "Running PyInstaller..."
+pyinstaller -y --name "DroneCAN_GUI_Tool" --windowed --icon icons/logo.ico \
+    --collect-all dronecan \
+    --collect-all dronecan_gui_tool \
+    --collect-all pymavlink \
+    --collect-all debugpy \
+    bin/dronecan_gui_tool
+
+echo "Setting up AppDir..."
+mkdir -p AppDir/usr/bin
+cp -r dist/DroneCAN_GUI_Tool/* AppDir/usr/bin/
+cp dronecan_gui_tool/icons/dronecan_gui_tool.png AppDir/dronecan_gui_tool.png
+
+# Create AppRun
+cat << 'EOF' > AppDir/AppRun
+#!/bin/bash
+HERE="$(dirname "$(readlink -f "${0}")")"
+export PATH="${HERE}/usr/bin:${PATH}"
+export LD_LIBRARY_PATH="${HERE}/usr/bin:${LD_LIBRARY_PATH}"
+exec "${HERE}/usr/bin/DroneCAN_GUI_Tool" "$@"
+EOF
+chmod +x AppDir/AppRun
+
+# Create Desktop file
+cat << 'EOF' > AppDir/dronecan_gui_tool.desktop
+[Desktop Entry]
+Name=DroneCAN GUI Tool
+Exec=AppRun
+Icon=dronecan_gui_tool
+Type=Application
+Categories=Development;Utility;
+EOF
+
+# Download appimagetool if not exists
+if [ ! -f "appimagetool-x86_64.AppImage" ]; then
+    echo "Downloading appimagetool..."
+    wget -q "https://github.com/AppImage/appimagetool/releases/download/${APPIMAGETOOL_RELEASE}/appimagetool-x86_64.AppImage"
+    echo "${APPIMAGETOOL_SHA256}  appimagetool-x86_64.AppImage" | sha256sum -c -
+    chmod +x appimagetool-x86_64.AppImage
+fi
+
+echo "Packaging AppImage..."
+# Create the AppImage
+./appimagetool-x86_64.AppImage --appimage-extract-and-run AppDir dist/DroneCAN_GUI_Tool-x86_64.AppImage
+
+echo "Build complete. Artifact: dist/DroneCAN_GUI_Tool-x86_64.AppImage"
+ls -lh dist/