Terrarum/how_to_build_jre_with_jlink.md

Preparation

Download and unzip the JDK for the appropriate operation systems first! JDKs can be downloaded on https://jdk.java.net/archive/.

Then, on the terminal, run following commands:

jlink --add-modules java.base,java.desktop,java.logging,jdk.unsupported --output ~/Documents/Terrarum/out/runtime-linux-amd64 --no-header-files --no-man-pages --strip-debug --compress=2

jlink --module-path ~/Documents/openjdk/jdk-17.0.1-aarch64/jmods:mods --add-modules java.base,java.desktop,java.logging,jdk.unsupported --output ~/Documents/Terrarum/out/runtime-linux-aarch64 --no-header-files --no-man-pages --strip-debug --compress=2 jlink --module-path ~/Documents/openjdk/jdk-17.0.1-windows/jmods:mods --add-modules java.base,java.desktop,java.logging,jdk.unsupported --output ~/Documents/Terrarum/out/runtime-windows-amd64 --no-header-files --no-man-pages --strip-debug --compress=2 jlink --module-path ~/Documents/openjdk/jdk-17.0.1.jdk-aarch64/Contents/Home/jmods:mods --add-modules java.base,java.desktop,java.logging,jdk.unsupported --output ~/Documents/Terrarum/out/runtime-osx-aarch64 --no-header-files --no-man-pages --strip-debug --compress=2 jlink --module-path ~/Documents/openjdk/jdk-17.0.1.jdk-amd64/Contents/Home/jmods:mods --add-modules java.base,java.desktop,java.logging,jdk.unsupported --output ~/Documents/Terrarum/out/runtime-osx-amd64 --no-header-files --no-man-pages --strip-debug --compress=2

This process assumes that the game does NOT use the Java 9+ modules and every single required libraries are fat-jar'd (their contents extracted right into the Jar)

Packaging

Create an output directory; its contents shall be:

+assets
+runtime-linux-aarch64
+runtime-linux-amd64
+runtime-osx-amd64
+runtime-osx-aarch64
+runtime-windows-amd64
start_game_linux.sh
start_game_mac.sh
start_game_windows.bat
TerrarumBuild.jar

whereas runtime-* are runtime directories generated from the commands above, TerrarumBuild.jar is the artifact built using the TerrarumBuild.

start_game_* files are on the root directory of the project; you only need to simply copy them over.