build_app_linux.sh

#!/bin/bash

#
# Copyright (c) 2021 by Gerrit Grunwald
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#

# ------ ENVIRONMENT --------------------------------------------------------
# The script depends on various environment variables to exist in order to
# run properly. The java version we want to use, the location of the java
# binaries (java home), and the project version as defined inside the pom.xml
# file, e.g. 1.0-SNAPSHOT.
#
# PROJECT_VERSION: version used in pom.xml, e.g. 1.0-SNAPSHOT
# APP_VERSION: the application version, e.g. 1.0.0, shown in "about" dialog

JAVA_VERSION=17
MAIN_JAR="SpaceFX-17.0.0.jar"
APP_VERSION=17.0.0

echo "java home: $JAVA_HOME"
echo "project version: $PROJECT_VERSION"
echo "app version: $APP_VERSION"
echo "main JAR file: $MAIN_JAR"

# ------ SETUP DIRECTORIES AND FILES ----------------------------------------
# Remove previously generated java runtime and installers. Copy all required
# jar files into the input/libs folder.

rm -rfd ./build/java-runtime/
rm -rfd build/installer/

mkdir -p build/installer/input/libs/

cp build/libs/* build/installer/input/libs/
cp build/libs/${MAIN_JAR} build/installer/input/libs/

# ------ REQUIRED MODULES ---------------------------------------------------
# Use jlink to detect all modules that are required to run the application.
# Starting point for the jdep analysis is the set of jars being used by the
# application.

echo "detecting required modules"
detected_modules=`$JAVA_HOME/bin/jdeps \
  --multi-release ${JAVA_VERSION} \
  --ignore-missing-deps \
  --print-module-deps \
  --class-path "build/installer/input/libs/*" \
    build/classes/java/main/eu/hansolo/spacefx/SpaceFX.class`
echo "detected modules: ${detected_modules}"


# ------ MANUAL MODULES -----------------------------------------------------
# jdk.crypto.ec has to be added manually bound via --bind-services or
# otherwise HTTPS does not work.
#
# See: https://bugs.openjdk.java.net/browse/JDK-8221674
#
# In addition we need jdk.localedata if the application is localized.
# This can be reduced to the actually needed locales via a jlink paramter,
# e.g., --include-locales=en,de.

manual_modules=jdk.crypto.ec,jdk.localedata
echo "manual modules: ${manual_modules}"

# ------ RUNTIME IMAGE ------------------------------------------------------
# Use the jlink tool to create a runtime image for our application. We are
# doing this is a separate step instead of letting jlink do the work as part
# of the jpackage tool. This approach allows for finer configuration and also
# works with dependencies that are not fully modularized, yet.

echo "creating java runtime image"
$JAVA_HOME/bin/jlink \
  --no-header-files \
  --no-man-pages  \
  --compress=2  \
  --strip-debug \
  --add-modules "${detected_modules},${manual_modules}" \
  --include-locales=en,de \
  --output build/java-runtime

# ------ PACKAGING ----------------------------------------------------------
# A loop iterates over the various packaging types supported by jpackage. In
# the end we will find all packages inside the build/installer directory.

for type in "deb" "rpm"
do
  echo "Creating installer of type ... $type"

  $JAVA_HOME/bin/jpackage \
  --type $type \
  --dest build/installer \
  --input build/installer/input/libs \
  --name SpaceFX \
  --main-class eu.hansolo.spacefx.Launcher \
  --main-jar ${MAIN_JAR} \
  --java-options -Xmx2048m \
  --java-options '--enable-preview' \
  --java-options '-Djdk.gtk.version=2' \
  --runtime-image build/java-runtime \
  --icon src/main/resources/eu/hansolo/spacefx/icon128x128.png \
  --app-version ${APP_VERSION} \
  --linux-shortcut \
  --linux-menu-group "SpaceFX" \
  --vendor "Gerrit Grunwald" \
  --copyright "Copyright © 2021 Gerrit Grunwald" \
  --description "A little Space shooter" \

done