Powershell script to start up BungeeCord servers

start-all.ps1

# BungeeCord Multi-Server Starter - 03/08/2023
# © 2023 WTFPL

#################
### Variables ###
#################

# The name of the script that starts the server
[string]$START = "start.ps1"

# The default name of each jar file.
# First BungeeCord, then in the order declared.
# If no value set for a server, default is the last value.
[string[]]$JARS = "BungeeCord.jar", "server.jar"

# The name of the BungeeCord and server folders.
# First BungeeCord, then in the order declared.
# Seperated by commas.
[string[]]$NAMES = "BungeeCord","lobby"

# If you want the server GUI to appear.
# False leads to greater performance.
[string]$GUI = "false"

# The Xmx value for the servers to use.
# First BungeeCord, then in the order declared.
# If no value set for a server, default is the last value.
# Seperated by commas.
[int[]]$XMX = 512,1024

# The Xms value for the servers to use, in the order declared.
# First BungeeCord, then in the order declared.
# If no value set for a server, default is the last value.
# Seperated by commas.
[int[]]$XMS = 512

# If the Xms values should be the same as the Xmx values.
[string]$COPY_XMX = "true"

#######################
### The Actual Code ###
#######################

# Tidying up input

# Checks to see if it says ".jar" at the end and puts it there
# if it's not
for ($i = 0; $i -lt $JARS.length; $i++) {
    $JAR = $JARS[$i]
    $JAR = [string[]]$JAR[($JAR.length - 4)..($JAR.length)]

    if (-join($JAR) -ne ".jar"){
        $JARS[$i] = $JARS[$i] + ".jar"
    }
}

if ([bool]::Parse($COPY_XMX)) { $XMS = $XMX }

if (-not ([bool]::Parse($GUI))){
    $GUI = " -nogui"
} else {
    $GUI = ""
}

$DIR = $PWD.ProviderPath

for ($i = 0; $i -lt $NAMES.length; $i++){
    $NAME = $NAMES[$i]

    $literallyJustForBungee = $GUI
    if ($i -eq 0){
        $literallyJustForBungee = ""
    }

    # Use the last Xms value for the rest of the servers if
    # more servers than values
    $bufferXMX = ""
    if ($i -gt $XMX.length){
        $bufferXMX = $XMX[$XMX.length - 1]
    } else {
        $bufferXMX = $XMX[$i]
    }

    # ^ Same thing but for Xmx
    $bufferXMS = ""
    if ($i -gt $XMS.length){
        $bufferXMS = $XMS[$XMS.length - 1]
    } else {
        $bufferXMS = $XMS[$i]
    }

    # ^ Same thing but for jar file
    $bufferJar = ""
    if ($i -gt $JARS.length){
        $bufferJar = $JARS[$JARS.length - 1]
    } else {
        $bufferJar = $JARS[$i]
    }

    # Configuring the command to start the server
    $second = "java -jar -Xmx$($bufferXMX)M -Xms$($bufferXMS)M $($bufferJar)$literallyJustForBungee"
    if (Test-Path -Path (Join-Path -Path $NAME -ChildPath $START) -PathType Leaf){
        $second = ".\" + $START
    }

    # IDEK if you even need to correct for Windows vs Unix file paths
    # in powershell
    # I hate Microsoft
    $dirConcat = Join-Path -Path $DIR -ChildPath $NAME

    #Start another powershell instance with the server
    Start-Process powershell.exe "-noexit -c Set-Location -LiteralPath `"$dirConcat`"; $second; exit"
}