build-AppImage.sh

#! /bin/bash

set -x
set -e

# this AppImage Building script for TexasSolverGui is small modification of example
# from https://docs.appimage.org/packaging-guide/from-source/native-binaries.html#using-qmake-and-make-install


EXECUTABLE=TexasSolverGui

# building in temporary directory to keep system clean
# use RAM disk if possible (as in: not building on CI system like Travis, and RAM disk is available)
if [ "$CI" == "" ] && [ -d /dev/shm ]; then
    TEMP_BASE=/dev/shm
else
    TEMP_BASE=/tmp
fi


BUILD_DIR=$(mktemp -d -p "$TEMP_BASE" appimage-build-XXXXXX)

# make sure to clean up build dir, even if errors occur
cleanup () {
    if [ -d "$BUILD_DIR" ]; then
        rm -rf "$BUILD_DIR"
    fi
}
trap cleanup EXIT

# store repo root as variable
REPO_ROOT=$(readlink -f $(dirname $(dirname $0)))
OLD_CWD=$(readlink -f .)

# switch to build dir
pushd "$BUILD_DIR"

# configure build files with qmake
# we need to explicitly set the install prefix, as CMake's default is /usr/local for some reason...
qmake "$REPO_ROOT"

# build project and install files into AppDir
if [ "$CI" == "" ];  then
    make -j
else
	# concurent build jobs takes too much of RAM on github-actions 
	make
fi
make install INSTALL_ROOT=AppDir

# now, build AppImage using linuxdeploy and linuxdeploy-plugin-qt
# download linuxdeploy and its Qt plugin
wget https://github.com/linuxdeploy/linuxdeploy/releases/download/continuous/linuxdeploy-x86_64.AppImage
wget https://github.com/linuxdeploy/linuxdeploy-plugin-qt/releases/download/continuous/linuxdeploy-plugin-qt-x86_64.AppImage

# make them executable
chmod +x linuxdeploy*.AppImage

# make sure Qt plugin finds QML sources so it can deploy the imported files
export QML_SOURCES_PATHS="$REPO_ROOT"/src

# QtQuickApp does support "make install", but we don't use it because we want to show the manual packaging approach in this example
# initialize AppDir, bundle shared libraries, add desktop file and icon, use Qt plugin to bundle additional resources, and build AppImage, all in one command
./linuxdeploy-x86_64.AppImage --appdir AppDir -e ${EXECUTABLE} -i "$REPO_ROOT"/imgs/texassolver_logo.png -d "$REPO_ROOT"/resources/desktop/TexasSolverGui.desktop --plugin qt --output appimage

# move built AppImage back into original CWD
mv ${EXECUTABLE}*.AppImage "$OLD_CWD"