From 49e9bff013a27b30ef512e1e195feb9d3b3d6cd7 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ji=C5=99=C3=AD=20=C5=A0tefka?= <jiri.stefka@atlas.cz>
Date: Sat, 25 Feb 2023 10:24:18 +0100
Subject: [PATCH] Add OenJDK JRE download Downloads the correct OpenJDK JRE if
 the wrong (or no) version of Java is installed

---
 .ms-manager/java.sh | 206 +++++++++++++++++++++++++++++++++++---------
 msman.sh            |   3 +-
 2 files changed, 168 insertions(+), 41 deletions(-)

diff --git a/.ms-manager/java.sh b/.ms-manager/java.sh
index d5fa6a4..5c9b788 100644
--- a/.ms-manager/java.sh
+++ b/.ms-manager/java.sh
@@ -1,66 +1,192 @@
 #!/bin/bash
 
-# Check if the correct version of Java is installed
+# Setup Java
+function setup_java {
+  # Get the required Java version for the Minecraft version
+  get_required_java
+
+  # Check if java was downloaded by the script
+  check_script_java
+
+  # Check if java is installed
+  if [[ $java_version == false ]]; then
+    check_java_exec
+    if [[ $java_version != false ]]; then
+      echo "System Java $java_version will be used."
+    fi
+  fi
+
+  if [[ $java_version == false ]]; then
+    >&2 echo "Java $required_java is not installed."
+    >&2 echo "Java $required_java is required to run Minecraft $version."
+    # Ask the user if they want to download Adoptium JRE
+    ask_jre
+  fi
+  echo
+  echo
+}
+
+# Ask the user if they want to download Adoptium JRE
+function ask_jre {
+  echo "This script can download the correct Adoptium JRE into '$(echo $HOME)/.adoptium_java' for you."
+  echo "You have 15 seconds to confirm or the script will exit."
+  read -t 12 -p "Do you want to download Adoptium JRE? (y/N)" download_java
+
+  if [[ $download_java == "y" ]] || [[ $download_java == "Y" ]]; then
+    get_os_arch
+    download_jre
+    check_script_java
+    if [[ $java_version == false ]]; then
+      >&2 echo "Java $required_java was not downloaded correctly."
+      >&2 echo "Please install Java $required_java manually."
+      exit 4
+    fi
+  else
+    >&2 echo "Please install Java $required_java and run this script again."
+    exit 12
+  fi
+}
+
+# Check if java was downloaded by the script
+function check_script_java {
+  if [[ -d "$(echo $HOME)/.adoptium_java" ]]; then
+    if [[ $required_java == "8" ]]; then
+      if [[ -d "$(echo $HOME)/.adoptium_java/jre8" ]]; then
+        java_version=8
+        if [[ -f "$(echo $HOME).adoptium_java/jre8/bin/java" ]]; then
+          PATH="$(echo $HOME)/.adoptium_java/jre8/bin:$PATH"
+        fi
+      fi
+    elif [[ $required_java == "11" ]]; then
+      if [[ -d "$(echo $HOME)/.adoptium_java/jre11" ]]; then
+        java_version=11
+        PATH="$(echo $HOME)/.adoptium_java/jre11/bin:$PATH"
+      fi
+    elif [[ $required_java == "16" ]]; then
+      if [[ -d "$(echo $HOME)/.adoptium_java/jre16" ]]; then
+        java_version=16
+        PATH="$(echo $HOME)/.adoptium_java/jre16/bin:$PATH"
+      fi
+    elif [[ $required_java == "17" ]]; then
+      if [[ -d "$(echo $HOME)/.adoptium_java/jre17" ]]; then
+        java_version=17
+        PATH="$(echo $HOME)/.adoptium_java/jre17/bin:$PATH"
+      fi
+    fi
+    check_java_exec
+    if [[ $java_version == $required_java ]]; then
+      echo "Java $java_version detected in '$(echo $HOME)/.adoptium_java/jre$(echo $java_version)/bin/java.' will be used."
+    else
+      java_version=false
+    fi
+  else
+    java_version=false
+  fi
+}
+
+# Get the system Java version
+function check_java_exec {
+# Check if java is installed
+  if ! command -v java &> /dev/null
+  then
+      java_version=false
+  fi
+
+  # If java is installed, get the version (the java_version won't be 0)
+  if [[ $java_version != false ]]; then
+    # Get the current Java version and extract the build number
+    java_version=$(java -version 2>&1 | awk -F '"' '/version/ {print $2}' | awk -F '.' '{print $1}')
+  fi
+}
+
+# Get the required Java version for the Minecraft version
 # For version 1.8 to 1.11 use java 8
 # For version 1.12 to 1.16.4 use java 11
 # For version 1.16.5 use java 16
 # For version 1.17.1 to 1.18.1+ use java 17
-function check_java {
-# Check if java is installed
-  if ! command -v java &> /dev/null
-  then
-      >&2 echo "Error: Java is not installed"
-      java_version="0"
-  fi
-
+function get_required_java {
   # Extract the middle number of the Minecraft version
   minecraft_middle=$(echo "$version" | awk -F '.' '{print $2}')
 
-  # If java is installed, get the version (the java_version won't be 0)
-  if [[ $java_version != "0" ]]; then
-    # Get the current Java version and extract the build number
-    java_version=$(java -version 2>&1 | awk -F '"' '/version/ {print $2}' | awk -F '.' '{print $1}')
-    echo "Java $java_version is installed."
-  fi
 
-  # Check if the correct version of java is installed
+  # Get the java version for the defined server version
   if (( 8 <= minecraft_middle && minecraft_middle <= 11 )); then
     if ! [[ $java_version -eq 8 ]]; then
-      >&2 echo "Java 8 is required for Minecraft version $select_version. Please install Java 8."
-      if [[ $java_version == 0 ]]; then
-        exit 3
-      fi
-      ask_continue
+      required_java=8
     fi
   elif (( 12 <= minecraft_middle && minecraft_middle <= 16 )); then
     if ! [[ $java_version -eq 11 ]]; then
-      >&2 echo "Java 11 is required for Minecraft version $select_version. Please install Java 11."
-      if [[ $java_version == 0 ]]; then
-        exit 3
-      fi
-      ask_continue
+      required_java=11
     fi
   elif (( minecraft_middle == 17 )); then
     if ! [[ $java_version -eq 16 ]]; then
-      >&2 echo "Java 16 is required for Minecraft version $select_version. Please install Java 16."
-      if [[ $java_version == 0 ]]; then
-        exit 3
-      fi
-      ask_continue
+      required_java=16
     fi
   elif (( 18 <= minecraft_middle )); then
     if ! [[ $java_version -eq 17 ]]; then
-      >&2 echo "Java 17 is required for Minecraft version $select_version. Please install Java 17."
-      if [[ $java_version == 0 ]]; then
-        exit 3
-      fi
-      ask_continue
+      required_java=17
     fi
   else
     >&2 echo "Unsupported Minecraft version $select_version."
-    if [[ $java_version == 0 ]]; then
-      exit 3
-    fi
-    ask_continue
+  fi
+}
+
+# Check host architecture
+function get_os_arch {
+  if [[ $(uname -m) == "x86_64" ]]; then
+    arch="x64"
+  elif [[ $(uname -m) == "aarch64" ]]; then
+    arch="aarch64"
+  else
+    >&2 echo "Unsupported architecture $(uname -m)."
+    >&2 echo "Please install Java $required_java manually."
+    exit 3
+  fi
+}
+
+# Download openjdk jre
+function download_jre {
+  # Check if .java folder exists
+  if ! [[ -d "$(echo $HOME)/.adoptium_java" ]]; then
+    echo "Creating $(echo $HOME)/.adoptium_java folder"
+    mkdir "$(echo $HOME)/.adoptium_java"
+  fi
+  # Download the correct version of Java
+  if [[ $required_java == "8" ]]; then
+    echo "Downloading Adoptium JRE 8"
+    curl -L -o java.tar.gz "https://github.com/adoptium/temurin8-binaries/releases/download/jdk8u362-b09/OpenJDK8U-jre_$(echo $arch)_linux_hotspot_8u362b09.tar.gz"
+    echo "Extracting Java 8"
+    tar -xzf java.tar.gz
+    echo "Moving Java 8 to $(echo $HOME)/.adoptium_java/jre8"
+    mv jdk8u362-b09-jre "$(echo $HOME)/.adoptium_java/jre8"
+    echo "Removing temporary files"
+    rm java.tar.gz
+  elif [[ $required_java == "11" ]]; then
+    echo "Downloading Adoptium JRE 11"
+    curl -L -o java.tar.gz "https://github.com/adoptium/temurin11-binaries/releases/download/jdk-11.0.18%2B10/OpenJDK11U-jre_$(echo $arch)_linux_hotspot_11.0.18_10.tar.gz"
+    echo "Extracting Java 11"
+    tar -xzf java.tar.gz
+    echo "Moving Java 11 to $(echo $HOME)/.adoptium_java/jre11"
+    mv jdk-11.0.18+10-jre "$(echo $HOME)/.adoptium_java/jre11"
+    echo "Removing temporary files"
+    rm java.tar.gz
+  elif [[ $required_java == "16" ]]; then
+    echo "Downloading Java 16"
+    curl -L -o java.tar.gz "https://github.com/adoptium/temurin11-binaries/releases/download/jdk-11.0.18%2B10/OpenJDK11U-jre_$(echo $arch)_linux_hotspot_16.0.2_7.tar.gz"
+    echo "Extracting Java 16"
+    tar -xzf java.tar.gz
+    echo "Moving Java 16 to $(echo $HOME)/.adoptium_java/jre16"
+    mv jdk-16.0.2+7-jre "$(echo $HOME)/.adoptium_java/jre16"
+    echo "Removing temporary files"
+    rm java.tar.gz
+  elif [[ $required_java == "17" ]]; then
+    echo "Downloading Java 17"
+    curl -L -o java.tar.gz "https://github.com/adoptium/temurin17-binaries/releases/download/jdk-17.0.6%2B10/OpenJDK17U-jre_$(echo $arch)_linux_hotspot_17.0.6_10.tar.gz"
+    echo "Extracting Java 17"
+    tar -xzf java.tar.gz
+    echo "Moving Java 17 to $(echo $HOME)/.adoptium_java/jre17"
+    mv jdk-17.0.6+10-jre "$(echo $HOME)/.adoptium_java/jre17"
+    echo "Removing temporary files"
+    rm java.tar.gz
   fi
 }
diff --git a/msman.sh b/msman.sh
index c242b2f..f2e9788 100755
--- a/msman.sh
+++ b/msman.sh
@@ -1,4 +1,5 @@
 #!/bin/bash
+set -e
 #############################################################################################################
 #                                Auto Update & Run PaperMC server script                                    #
 #                                              by jiriks74                                                  #
@@ -385,7 +386,7 @@ function main {
   check_version_valid
 
   # Check if the correct java version is installed
-  check_java
+  setup_java
 
   # Check if the server is up to date and if not, update it
   check_and_update