Added an experimental JDK wrapper

.gitignore

@@ -6,6 +6,7 @@
 /.project
 
 # Ignore IDEA project files
+/.idea
 /*/.idea
 
 *.log
@@ -16,4 +17,5 @@
 .gradle
 
 # Ignore Gradle build output directory
-build
+/build
+/*/build

build.gradle

@@ -1,5 +1,15 @@
 import org.gradle.internal.os.OperatingSystem
 
+plugins {
+    id "me.filippov.gradle.jvm.wrapper" version "0.9.3"
+}
+
+jvmWrapper {
+    linuxJvmUrl = "https://corretto.aws/downloads/latest/amazon-corretto-11-x64-linux-jdk.tar.gz"
+    macJvmUrl = "https://corretto.aws/downloads/latest/amazon-corretto-11-x64-macos-jdk.tar.gz"
+    windowsJvmUrl = "https://corretto.aws/downloads/latest/amazon-corretto-11-x64-windows-jdk.zip"
+}
+
 wrapper {
     distributionType = Wrapper.DistributionType.ALL
 }
@@ -13,8 +23,15 @@ project.ext.isPrerelease = true
 project.ext.prereleaseName = "alpha"
 project.ext.prerealeaseUpdate = 2
 
-allprojects {
+subprojects {
     apply plugin: 'java'
+    apply plugin: 'maven-publish'
+
+    project.ext.lwjglVersion = "3.2.3"
+
+    project.ext.jomlVersion = "1.9.25"
+    project.ext.steamworks4jVersion = "1.8.0"
+    project.ext.steamworks4jServerVersion = "1.8.0"
 
     group = "cz.tefek"
     version = isPrerelease ?
@@ -30,16 +47,6 @@ allprojects {
         sourceCompatibility = JavaVersion.VERSION_11
         targetCompatibility = JavaVersion.VERSION_11
     }
-}
-
-subprojects {
-    apply plugin: 'maven-publish'
-
-    project.ext.lwjglVersion = "3.2.3"
-
-    project.ext.jomlVersion = "1.9.25"
-    project.ext.steamworks4jVersion = "1.8.0"
-    project.ext.steamworks4jServerVersion = "1.8.0"
 
     publishing {
         publications {

gradlew

@@ -83,6 +83,76 @@ esac
 CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
 
 
+# GRADLE JVM WRAPPER START MARKER
+BUILD_DIR=$APP_HOME/build
+
+if [ "$darwin" = "true" ]; then
+    JVM_TEMP_FILE=$BUILD_DIR/jvm-macosx-x64.tar.gz
+    JVM_URL=https://corretto.aws/downloads/latest/amazon-corretto-11-x64-macos-jdk.tar.gz
+    JVM_TARGET_DIR=$BUILD_DIR/gradle-jvm/amazon-corretto-11-x64-macos-jdk-378f50
+elif [ "$cygwin" = "true" ] || [ "$msys" = "true" ]; then
+    JVM_TEMP_FILE=$BUILD_DIR/jvm-windows-x64.zip
+    JVM_URL=https://d3pxv6yz143wms.cloudfront.net/11.0.4.11.1/amazon-corretto-11.0.4.11.1-windows-x64.zip
+    JVM_TARGET_DIR=$BUILD_DIR/amazon-corretto-11-x64-windows-jdk-f3b61a
+else
+    JVM_TEMP_FILE=$BUILD_DIR/jvm-linux-x64.tar.gz
+    JVM_URL=https://corretto.aws/downloads/latest/amazon-corretto-11-x64-linux-jdk.tar.gz
+    JVM_TARGET_DIR=$BUILD_DIR/gradle-jvm/amazon-corretto-11-x64-linux-jdk-e264c4
+fi
+
+set -e
+
+if [ -e "$JVM_TARGET_DIR/.flag" ] && [ -n "$(ls "$JVM_TARGET_DIR")" ] && [ "x$(cat "$JVM_TARGET_DIR/.flag")" = "x${JVM_URL}" ]; then
+    # Everything is up-to-date in $JVM_TARGET_DIR, do nothing
+    true
+else
+  warn "Downloading $JVM_URL to $JVM_TEMP_FILE"
+
+  rm -f "$JVM_TEMP_FILE"
+  mkdir -p "$BUILD_DIR"
+  if command -v curl >/dev/null 2>&1; then
+      if [ -t 1 ]; then CURL_PROGRESS="--progress-bar"; else CURL_PROGRESS="--silent --show-error"; fi
+      # shellcheck disable=SC2086
+      curl $CURL_PROGRESS --output "${JVM_TEMP_FILE}" "$JVM_URL"
+  elif command -v wget >/dev/null 2>&1; then
+      if [ -t 1 ]; then WGET_PROGRESS=""; else WGET_PROGRESS="-nv"; fi
+      wget $WGET_PROGRESS -O "${JVM_TEMP_FILE}" "$JVM_URL"
+  else
+      die "ERROR: Please install wget or curl"
+  fi
+
+  warn "Extracting $JVM_TEMP_FILE to $JVM_TARGET_DIR"
+  rm -rf "$JVM_TARGET_DIR"
+  mkdir -p "$JVM_TARGET_DIR"
+
+  if [ "$cygwin" = "true" ] || [ "$msys" = "true" ]; then
+      unzip "$JVM_TEMP_FILE" -d "$JVM_TARGET_DIR"
+  else
+      tar -x -f "$JVM_TEMP_FILE" -C "$JVM_TARGET_DIR"
+  fi
+  rm -f "$JVM_TEMP_FILE"
+
+  echo "$JVM_URL" >"$JVM_TARGET_DIR/.flag"
+fi
+
+JAVA_HOME=
+for d in "$JVM_TARGET_DIR" "$JVM_TARGET_DIR"/* "$JVM_TARGET_DIR"/Contents/Home "$JVM_TARGET_DIR"/*/Contents/Home; do
+  if [ -e "$d/bin/java" ]; then
+    JAVA_HOME="$d"
+  fi
+done
+
+if [ '!' -e "$JAVA_HOME/bin/java" ]; then
+  die "Unable to find bin/java under $JVM_TARGET_DIR"
+fi
+
+# Make it available for child processes
+export JAVA_HOME
+
+set +e
+
+# GRADLE JVM WRAPPER END MARKER
+
 # Determine the Java command to use to start the JVM.
 if [ -n "$JAVA_HOME" ] ; then
     if [ -x "$JAVA_HOME/jre/sh/java" ] ; then

gradlew.bat

@@ -35,6 +35,67 @@ for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
 @rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
 set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
 
+@rem GRADLE JVM WRAPPER START MARKER
+
+setlocal
+
+set BUILD_DIR=%APP_HOME%build\
+set JVM_TARGET_DIR=%BUILD_DIR%gradle-jvm\amazon-corretto-11-x64-windows-jdk-f3b61a\
+
+set JVM_TEMP_FILE=jvm-windows-x64.zip
+set JVM_URL=https://corretto.aws/downloads/latest/amazon-corretto-11-x64-windows-jdk.zip
+
+set POWERSHELL=%SystemRoot%\system32\WindowsPowerShell\v1.0\powershell.exe
+
+if not exist "%JVM_TARGET_DIR%" MD "%JVM_TARGET_DIR%"
+
+if not exist "%JVM_TARGET_DIR%.flag" goto downloadAndExtractJvm
+
+set /p CURRENT_FLAG=<"%JVM_TARGET_DIR%.flag"
+if "%CURRENT_FLAG%" == "%JVM_URL%" goto continueWithJvm
+
+:downloadAndExtractJvm
+
+CD "%BUILD_DIR%"
+if errorlevel 1 goto fail
+
+echo Downloading %JVM_URL% to %BUILD_DIR%%JVM_TEMP_FILE%
+if exist "%JVM_TEMP_FILE%" DEL /F "%JVM_TEMP_FILE%"
+"%POWERSHELL%" -nologo -noprofile -Command "Set-StrictMode -Version 3.0; $ErrorActionPreference = \"Stop\"; (New-Object Net.WebClient).DownloadFile('%JVM_URL%', '%JVM_TEMP_FILE%')"
+if errorlevel 1 goto fail
+
+RMDIR /S /Q "%JVM_TARGET_DIR%"
+if errorlevel 1 goto fail
+
+MKDIR "%JVM_TARGET_DIR%"
+if errorlevel 1 goto fail
+
+CD "%JVM_TARGET_DIR%"
+if errorlevel 1 goto fail
+
+echo Extracting %BUILD_DIR%%JVM_TEMP_FILE% to %JVM_TARGET_DIR%
+"%POWERSHELL%" -nologo -noprofile -command "Set-StrictMode -Version 3.0; $ErrorActionPreference = \"Stop\"; Add-Type -A 'System.IO.Compression.FileSystem'; [IO.Compression.ZipFile]::ExtractToDirectory('..\\..\\%JVM_TEMP_FILE%', '.');"
+if errorlevel 1 goto fail
+
+DEL /F "..\..\%JVM_TEMP_FILE%"
+if errorlevel 1 goto fail
+
+echo %JVM_URL%>"%JVM_TARGET_DIR%.flag"
+if errorlevel 1 goto fail
+
+:continueWithJvm
+
+set JAVA_HOME=
+for /d %%d in ("%JVM_TARGET_DIR%"*) do if exist "%%d\bin\java.exe" set JAVA_HOME=%%d
+if not exist "%JAVA_HOME%\bin\java.exe" (
+  echo Unable to find java.exe under %JVM_TARGET_DIR%
+  goto fail
+)
+
+endlocal & set JAVA_HOME=%JAVA_HOME%
+
+@rem GRADLE JVM WRAPPER END MARKER
+
 @rem Find java.exe
 if defined JAVA_HOME goto findJavaFromJavaHome