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#!/bin/bash

# Forge Installation Script

# Server Files: /mnt/server

apt update

apt install -y curl jq

if [ ! -d /mnt/server ]; then

if [[ ! -d /mnt/server ]]; then

mkdir /mnt/server

cd /mnt/server

# Remove spaces from the version number to avoid issues with curl

FORGE_VERSION="$(echo "$FORGE_VERSION" | tr -d ' ')"

MC_VERSION="$(echo "$MC_VERSION" | tr -d ' ')"

if [ ! -z ${FORGE_VERSION} ]; then

if [[ ! -z ${FORGE_VERSION} ]]; then

DOWNLOAD_LINK=https://maven.minecraftforge.net/net/minecraftforge/forge/${FORGE_VERSION}/forge-${FORGE_VERSION}

FORGE_JAR=forge-${FORGE_VERSION}*.jar

else

JSON_DATA=$(curl -sSL https://files.minecraftforge.net/maven/net/minecraftforge/forge/promotions_slim.json)

if [ "${MC_VERSION}" == "latest" ] || [ "${MC_VERSION}" == "" ] ; then

if [[ "${MC_VERSION}" == "latest" ]] || [[ "${MC_VERSION}" == "" ]]; then

echo -e "getting latest version of forge."

MC_VERSION=$(echo -e ${JSON_DATA} | jq -r '.promos | del(."latest-1.7.10") | del(."1.7.10-latest-1.7.10") | to_entries[] | .key | select(contains("recommended")) | split("-")[0]' | sort -t. -k 1,1n -k 2,2n -k 3,3n -k 4,4n | tail -1)

MC_VERSION=$(echo -e ${JSON_DATA} | jq -r '.promos | del(."latest-1.7.10") | del(."1.7.10-latest-1.7.10") | to_entries[] | .key | select(contains("latest")) | split("-")[0]' | sort -t. -k 1,1n -k 2,2n -k 3,3n -k 4,4n | tail -1)

BUILD_TYPE=latest

if [ "${BUILD_TYPE}" != "recommended" ] && [ "${BUILD_TYPE}" != "latest" ]; then

if [[ "${BUILD_TYPE}" != "recommended" ]] && [[ "${BUILD_TYPE}" != "latest" ]]; then

BUILD_TYPE=recommended

echo -e "minecraft version: ${MC_VERSION}"

echo -e "build type: ${BUILD_TYPE}"

## some variables for getting versions and things

FILE_SITE=https://maven.minecraftforge.net/net/minecraftforge/forge/

VERSION_KEY=$(echo -e ${JSON_DATA} | jq -r --arg MC_VERSION "${MC_VERSION}" --arg BUILD_TYPE "${BUILD_TYPE}" '.promos | del(."latest-1.7.10") | del(."1.7.10-latest-1.7.10") | to_entries[] | .key | select(contains($MC_VERSION)) | select(contains($BUILD_TYPE))')

## locating the forge version

if [ "${VERSION_KEY}" == "" ] && [ "${BUILD_TYPE}" == "recommended" ]; then

if [[ "${VERSION_KEY}" == "" ]] && [[ "${BUILD_TYPE}" == "recommended" ]]; then

echo -e "dropping back to latest from recommended due to there not being a recommended version of forge for the mc version requested."

VERSION_KEY=$(echo -e ${JSON_DATA} | jq -r --arg MC_VERSION "${MC_VERSION}" '.promos | del(."latest-1.7.10") | del(."1.7.10-latest-1.7.10") | to_entries[] | .key | select(contains($MC_VERSION)) | select(contains("recommended"))')

## Error if the mc version set wasn't valid.

if [ "${VERSION_KEY}" == "" ] || [ "${VERSION_KEY}" == "null" ]; then

echo -e "The install failed because there is no valid version of forge for the version of minecraft selected."

exit 1

FORGE_VERSION=$(echo -e ${JSON_DATA} | jq -r --arg VERSION_KEY "$VERSION_KEY" '.promos | .[$VERSION_KEY]')

if [ "${MC_VERSION}" == "1.7.10" ] || [ "${MC_VERSION}" == "1.8.9" ]; then

if [[ "${MC_VERSION}" == "1.7.10" ]] || [[ "${MC_VERSION}" == "1.8.9" ]]; then

DOWNLOAD_LINK=${FILE_SITE}${MC_VERSION}-${FORGE_VERSION}-${MC_VERSION}/forge-${MC_VERSION}-${FORGE_VERSION}-${MC_VERSION}

FORGE_JAR=forge-${MC_VERSION}-${FORGE_VERSION}-${MC_VERSION}.jar

if [ "${MC_VERSION}" == "1.7.10" ]; then

if [[ "${MC_VERSION}" == "1.7.10" ]]; then

FORGE_JAR=forge-${MC_VERSION}-${FORGE_VERSION}-${MC_VERSION}-universal.jar

else

DOWNLOAD_LINK=${FILE_SITE}${MC_VERSION}-${FORGE_VERSION}/forge-${MC_VERSION}-${FORGE_VERSION}

FORGE_JAR=forge-${MC_VERSION}-${FORGE_VERSION}.jar

else

DOWNLOAD_LINK=${FILE_SITE}${MC_VERSION}-${FORGE_VERSION}/forge-${MC_VERSION}-${FORGE_VERSION}

FORGE_JAR=forge-${MC_VERSION}-${FORGE_VERSION}.jar

#Adding .jar when not eding by SERVER_JARFILE

if [[ ! $SERVER_JARFILE = *\.jar ]]; then

SERVER_JARFILE="$SERVER_JARFILE.jar"

#Downloading jars

echo -e "Downloading forge version ${FORGE_VERSION}"

echo -e "Download link is ${DOWNLOAD_LINK}"

if [ ! -z "${DOWNLOAD_LINK}" ]; then

if [[ ! -z "${DOWNLOAD_LINK}" ]]; then

if curl --output /dev/null --silent --head --fail ${DOWNLOAD_LINK}-installer.jar; then

echo -e "installer jar download link is valid."

else

echo -e "link is invalid. Exiting now"

exit 2

else

echo -e "no download link provided. Exiting now"

exit 3

curl -s -o installer.jar -sS ${DOWNLOAD_LINK}-installer.jar

#Checking if downloaded jars exist

if [ ! -f ./installer.jar ]; then

if [[ ! -f ./installer.jar ]]; then

echo "!!! Error by downloading forge version ${FORGE_VERSION} !!!"

echo "!!! Error downloading forge version ${FORGE_VERSION} !!!"

exit

# Delete args file to support downgrading to versions below 1.17

function unix_args {

if [ -f unix_args.txt ]; then

echo -e "Detected Forge 1.17 or newer version. Setting up forge unix args."

rm unix_args.txt

ln -sf libraries/net/minecraftforge/forge/*/unix_args.txt unix_args.txt

exit

}

# Delete args to support downgrading/upgrading

rm -rf libraries/net/minecraftforge/forge

rm unix_args.txt

#Installing server

echo -e "Installing forge server.\n"

java -jar installer.jar --installServer || { echo -e "install failed"; exit 4; }

java -jar installer.jar --installServer || { echo -e "install failed using Forge version ${FORGE_VERSION} and Minecraft version ${MINECRAFT_VERSION}"; exit 4; }

if [[ $MC_VERSION == *"1.17."* || $MC_VERSION == *"1.18."* || $FORGE_VERSION == *"1.17."* || $FORGE_VERSION == *"1.18."* ]]; then

# Check if we need a symlink for 1.17+ Forge JPMS args

# Create a symlink for 1.17+ Forge args

if [[ $MC_VERSION =~ ^1\.(17|18|19|20|21|22|23) || $FORGE_VERSION =~ ^1\.(17|18|19|20|21|22|23) ]]; then

ln -sf libraries/net/minecraftforge/forge/*/unix_args.txt unix_args.txt

unix_args

else

# For versions below 1.17 that ship with jar delete installer.jar

# Check if someone has set MC to latest but overwrote it with older Forge version, otherwise we would have false positives

mv $FORGE_JAR $SERVER_JARFILE

elif [[ $MC_VERSION == "latest" && $FORGE_VERSION =~ ^1\.(17|18|19|20|21|22|23) ]]; then

echo -e "Deleting installer.jar file.\n"

unix_args

rm -rf installer.jar

else

# For versions below 1.17 that ship with jar

mv $FORGE_JAR $SERVER_JARFILE

echo -e "Deleting installer.jar file.\n"

rm -rf installer.jar

Saved diffs

Original text

Open file

#!/bin/bash
# Forge Installation Script
#
# Server Files: /mnt/server
apt update
apt install -y curl jq

if [ ! -d /mnt/server ]; then
    mkdir /mnt/server
fi

cd /mnt/server

# Remove spaces from the version number to avoid issues with curl
FORGE_VERSION="$(echo "$FORGE_VERSION" | tr -d ' ')"
MC_VERSION="$(echo "$MC_VERSION" | tr -d ' ')"

if [ ! -z ${FORGE_VERSION} ]; then
    DOWNLOAD_LINK=https://maven.minecraftforge.net/net/minecraftforge/forge/${FORGE_VERSION}/forge-${FORGE_VERSION}
    FORGE_JAR=forge-${FORGE_VERSION}*.jar
else
    JSON_DATA=$(curl -sSL https://files.minecraftforge.net/maven/net/minecraftforge/forge/promotions_slim.json)

if [ "${MC_VERSION}" == "latest" ] || [ "${MC_VERSION}" == "" ] ; then
        echo -e "getting latest version of forge."
        MC_VERSION=$(echo -e ${JSON_DATA} | jq -r '.promos | del(."latest-1.7.10") | del(."1.7.10-latest-1.7.10") | to_entries[] | .key | select(contains("recommended")) | split("-")[0]' | sort -t. -k 1,1n -k 2,2n -k 3,3n -k 4,4n | tail -1)
    	BUILD_TYPE=latest
    fi

if [ "${BUILD_TYPE}" != "recommended" ] && [ "${BUILD_TYPE}" != "latest" ]; then
        BUILD_TYPE=recommended
    fi

echo -e "minecraft version: ${MC_VERSION}"
    echo -e "build type: ${BUILD_TYPE}"

## some variables for getting versions and things
	FILE_SITE=https://maven.minecraftforge.net/net/minecraftforge/forge/
    VERSION_KEY=$(echo -e ${JSON_DATA} | jq -r --arg MC_VERSION "${MC_VERSION}" --arg BUILD_TYPE "${BUILD_TYPE}" '.promos | del(."latest-1.7.10") | del(."1.7.10-latest-1.7.10") | to_entries[] | .key | select(contains($MC_VERSION)) | select(contains($BUILD_TYPE))')

## locating the forge version
    if [ "${VERSION_KEY}" == "" ] && [ "${BUILD_TYPE}" == "recommended" ]; then
        echo -e "dropping back to latest from recommended due to there not being a recommended version of forge for the mc version requested."
        VERSION_KEY=$(echo -e ${JSON_DATA} | jq -r --arg MC_VERSION "${MC_VERSION}" '.promos | del(."latest-1.7.10") | del(."1.7.10-latest-1.7.10") | to_entries[] | .key | select(contains($MC_VERSION)) | select(contains("recommended"))')
    fi

## Error if the mc version set wasn't valid.
    if [ "${VERSION_KEY}" == "" ] || [ "${VERSION_KEY}" == "null" ]; then
    	echo -e "The install failed because there is no valid version of forge for the version of minecraft selected."
    	exit 1
    fi

FORGE_VERSION=$(echo -e ${JSON_DATA} | jq -r --arg VERSION_KEY "$VERSION_KEY" '.promos | .[$VERSION_KEY]')

if [ "${MC_VERSION}" == "1.7.10" ] || [ "${MC_VERSION}" == "1.8.9" ]; then
        DOWNLOAD_LINK=${FILE_SITE}${MC_VERSION}-${FORGE_VERSION}-${MC_VERSION}/forge-${MC_VERSION}-${FORGE_VERSION}-${MC_VERSION}
        FORGE_JAR=forge-${MC_VERSION}-${FORGE_VERSION}-${MC_VERSION}.jar
        if [ "${MC_VERSION}" == "1.7.10" ]; then
            FORGE_JAR=forge-${MC_VERSION}-${FORGE_VERSION}-${MC_VERSION}-universal.jar
        fi
    else
        DOWNLOAD_LINK=${FILE_SITE}${MC_VERSION}-${FORGE_VERSION}/forge-${MC_VERSION}-${FORGE_VERSION}
        FORGE_JAR=forge-${MC_VERSION}-${FORGE_VERSION}.jar
    fi
fi

#Adding .jar when not eding by SERVER_JARFILE
if [[ ! $SERVER_JARFILE = *\.jar ]]; then
  SERVER_JARFILE="$SERVER_JARFILE.jar"
fi

#Downloading jars
echo -e "Downloading forge version ${FORGE_VERSION}"
echo -e "Download link is ${DOWNLOAD_LINK}"

if [ ! -z "${DOWNLOAD_LINK}" ]; then
    if curl --output /dev/null --silent --head --fail ${DOWNLOAD_LINK}-installer.jar; then
        echo -e "installer jar download link is valid."
    else
        echo -e "link is invalid. Exiting now"
        exit 2
    fi
else
    echo -e "no download link provided. Exiting now"
    exit 3
fi

curl -s -o installer.jar -sS ${DOWNLOAD_LINK}-installer.jar

#Checking if downloaded jars exist
if [ ! -f ./installer.jar ]; then
    echo "!!! Error by downloading forge version ${FORGE_VERSION} !!!"
    exit
fi

# Delete args file to support downgrading to versions below 1.17
if [ -f unix_args.txt ]; then
    rm unix_args.txt
    exit
fi

#Installing server
echo -e "Installing forge server.\n"
java -jar installer.jar --installServer || { echo -e "install failed"; exit 4; }

if [[ $MC_VERSION == *"1.17."* || $MC_VERSION == *"1.18."*  || $FORGE_VERSION == *"1.17."* || $FORGE_VERSION == *"1.18."* ]]; then
    # Create a symlink for 1.17+ Forge args
    ln -sf libraries/net/minecraftforge/forge/*/unix_args.txt unix_args.txt
    else
    # For versions below 1.17 that ship with jar delete installer.jar
    mv $FORGE_JAR $SERVER_JARFILE
    echo -e "Deleting installer.jar file.\n"
    rm -rf installer.jar
fi

Changed text

Open file

#!/bin/bash
# Forge Installation Script
#
# Server Files: /mnt/server
apt update
apt install -y curl jq

if [[ ! -d /mnt/server ]]; then
  mkdir /mnt/server
fi

cd /mnt/server

# Remove spaces from the version number to avoid issues with curl
FORGE_VERSION="$(echo "$FORGE_VERSION" | tr -d ' ')"
MC_VERSION="$(echo "$MC_VERSION" | tr -d ' ')"

if [[ ! -z ${FORGE_VERSION} ]]; then
  DOWNLOAD_LINK=https://maven.minecraftforge.net/net/minecraftforge/forge/${FORGE_VERSION}/forge-${FORGE_VERSION}
  FORGE_JAR=forge-${FORGE_VERSION}*.jar
else
  JSON_DATA=$(curl -sSL https://files.minecraftforge.net/maven/net/minecraftforge/forge/promotions_slim.json)

if [[ "${MC_VERSION}" == "latest" ]] || [[ "${MC_VERSION}" == "" ]]; then
    echo -e "getting latest version of forge."
    MC_VERSION=$(echo -e ${JSON_DATA} | jq -r '.promos | del(."latest-1.7.10") | del(."1.7.10-latest-1.7.10") | to_entries[] | .key | select(contains("latest")) | split("-")[0]' | sort -t. -k 1,1n -k 2,2n -k 3,3n -k 4,4n | tail -1)
    BUILD_TYPE=latest
  fi

if [[ "${BUILD_TYPE}" != "recommended" ]] && [[ "${BUILD_TYPE}" != "latest" ]]; then
    BUILD_TYPE=recommended
  fi

echo -e "minecraft version: ${MC_VERSION}"
  echo -e "build type: ${BUILD_TYPE}"

## some variables for getting versions and things
  FILE_SITE=https://maven.minecraftforge.net/net/minecraftforge/forge/
  VERSION_KEY=$(echo -e ${JSON_DATA} | jq -r --arg MC_VERSION "${MC_VERSION}" --arg BUILD_TYPE "${BUILD_TYPE}" '.promos | del(."latest-1.7.10") | del(."1.7.10-latest-1.7.10") | to_entries[] | .key | select(contains($MC_VERSION)) | select(contains($BUILD_TYPE))')

## locating the forge version
  if [[ "${VERSION_KEY}" == "" ]] && [[ "${BUILD_TYPE}" == "recommended" ]]; then
    echo -e "dropping back to latest from recommended due to there not being a recommended version of forge for the mc version requested."
    VERSION_KEY=$(echo -e ${JSON_DATA} | jq -r --arg MC_VERSION "${MC_VERSION}" '.promos | del(."latest-1.7.10") | del(."1.7.10-latest-1.7.10") | to_entries[] | .key | select(contains($MC_VERSION)) | select(contains("latest"))')
  fi

## Error if the mc version set wasn't valid.
  if [ "${VERSION_KEY}" == "" ] || [ "${VERSION_KEY}" == "null" ]; then
    echo -e "The install failed because there is no valid version of forge for the version of minecraft selected."
    exit 1
  fi

FORGE_VERSION=$(echo -e ${JSON_DATA} | jq -r --arg VERSION_KEY "$VERSION_KEY" '.promos | .[$VERSION_KEY]')

if [[ "${MC_VERSION}" == "1.7.10" ]] || [[ "${MC_VERSION}" == "1.8.9" ]]; then
    DOWNLOAD_LINK=${FILE_SITE}${MC_VERSION}-${FORGE_VERSION}-${MC_VERSION}/forge-${MC_VERSION}-${FORGE_VERSION}-${MC_VERSION}
    FORGE_JAR=forge-${MC_VERSION}-${FORGE_VERSION}-${MC_VERSION}.jar
    if [[ "${MC_VERSION}" == "1.7.10" ]]; then
      FORGE_JAR=forge-${MC_VERSION}-${FORGE_VERSION}-${MC_VERSION}-universal.jar
    fi
  else
    DOWNLOAD_LINK=${FILE_SITE}${MC_VERSION}-${FORGE_VERSION}/forge-${MC_VERSION}-${FORGE_VERSION}
    FORGE_JAR=forge-${MC_VERSION}-${FORGE_VERSION}.jar
  fi
fi

#Adding .jar when not eding by SERVER_JARFILE
if [[ ! $SERVER_JARFILE = *\.jar ]]; then
  SERVER_JARFILE="$SERVER_JARFILE.jar"
fi

#Downloading jars
echo -e "Downloading forge version ${FORGE_VERSION}"
echo -e "Download link is ${DOWNLOAD_LINK}"

if [[ ! -z "${DOWNLOAD_LINK}" ]]; then
  if curl --output /dev/null --silent --head --fail ${DOWNLOAD_LINK}-installer.jar; then
    echo -e "installer jar download link is valid."
  else
    echo -e "link is invalid. Exiting now"
    exit 2
  fi
else
  echo -e "no download link provided. Exiting now"
  exit 3
fi

curl -s -o installer.jar -sS ${DOWNLOAD_LINK}-installer.jar

#Checking if downloaded jars exist
if [[ ! -f ./installer.jar ]]; then
  echo "!!! Error downloading forge version ${FORGE_VERSION} !!!"
  exit
fi

function  unix_args {
  echo -e "Detected Forge 1.17 or newer version. Setting up forge unix args."
  ln -sf libraries/net/minecraftforge/forge/*/unix_args.txt unix_args.txt
}

# Delete args to support downgrading/upgrading
rm -rf libraries/net/minecraftforge/forge
rm unix_args.txt

#Installing server
echo -e "Installing forge server.\n"
java -jar installer.jar --installServer || { echo -e "install failed using Forge version ${FORGE_VERSION} and Minecraft version ${MINECRAFT_VERSION}"; exit 4; }

# Check if we need a symlink for 1.17+ Forge JPMS args
if [[ $MC_VERSION =~ ^1\.(17|18|19|20|21|22|23) || $FORGE_VERSION =~ ^1\.(17|18|19|20|21|22|23) ]]; then
  unix_args

# Check if someone has set MC to latest but overwrote it with older Forge version, otherwise we would have false positives
elif [[ $MC_VERSION == "latest" && $FORGE_VERSION =~ ^1\.(17|18|19|20|21|22|23) ]]; then
  unix_args
else
  # For versions below 1.17 that ship with jar
  mv $FORGE_JAR $SERVER_JARFILE
fi

echo -e "Deleting installer.jar file.\n"
rm -rf installer.jar