Expected Behaviour

An installation method that doesn't require an X server for no reason.

Actual Behaviour

While attempting to create a window on a machine with no screen, the installer crashes with the error 'No X11 DISPLAY variable was set' - since there is no X server installed.

Log

java -jar forge-1.18.2-40.1.31-installer.jar
JVM info: Debian - 17.0.2 - 17.0.2+8-Debian-1deb11u1
java.net.preferIPv4Stack=true
Found java version 17.0.2
Exception in thread "main"
java.awt.HeadlessException:
No X11 DISPLAY variable was set,
but this program performed an operation which requires it.
        at java.desktop/java.awt.GraphicsEnvironment.checkHeadless(GraphicsEnvironment.java:166)
        at java.desktop/java.awt.Window.<init>(Window.java:553)
        at java.desktop/java.awt.Frame.<init>(Frame.java:428)
        at java.desktop/java.awt.Frame.<init>(Frame.java:393)
        at java.desktop/javax.swing.SwingUtilities$SharedOwnerFrame.<init>(SwingUtilities.java:1919)
        at java.desktop/javax.swing.SwingUtilities.getSharedOwnerFrame(SwingUtilities.java:1995)
        at java.desktop/javax.swing.JOptionPane.getRootFrame(JOptionPane.java:1695)
        at java.desktop/javax.swing.JOptionPane.showOptionDialog(JOptionPane.java:874)
        at java.desktop/javax.swing.JOptionPane.showMessageDialog(JOptionPane.java:676)
        at java.desktop/javax.swing.JOptionPane.showMessageDialog(JOptionPane.java:647)
        at net.minecraftforge.installer.SimpleInstaller.launchGui(SimpleInstaller.java:177)
        at net.minecraftforge.installer.SimpleInstaller.main(SimpleInstaller.java:147)

 

Edited June 8, 20223 yr by radj307
resolved

It should also be noted that the `nogui` option I've seen some people using has no effect; the output is identical.

Ah, works great, many thanks!

 

Full command for anyone that stumbles across this later:

    java -jar forge-*-installer.jar --installServer

You can run with --help to get a list of possible command line arguments.

But to be explicit you can see them here: <https://github.com/MinecraftForge/Installer/blob/2.0/src/main/java/net/minecraftforge/installer/SimpleInstaller.java#L82>