Using Prism Launcher via the Command Line
Usage: prismlauncher [-h] [-v] [-d <dir>] [-l <launch>] [-s <server>] [-a <profile>] [-I <import>] [--show <show>] [--alive] [--help-all]
Options:
-d, --dir <directory> Use a custom path as application root (use '.' for current directory)
-l, --launch <instance> Launch the specified instance (by instance ID)
-s, --server <address> Join the specified server on launch (only valid in combination with --launch)
-a, --profile <profile> Use the account specified by its profile name (only valid in combination with --launch)
--alive Write a small 'live.check' file after the launcher starts
-I, --import <file> Import instance from specified zip (local path or URL)
--show <show> Opens the window for the specified instance (by instance ID)
-h, --help Displays help on commandline options.
--help-all Displays help, including generic Qt options.
-v, --version Displays version information.What is an instance ID, and where do I find it?
The instance ID is the name of the folder where your instance is contained.
To find it, right-click on the instance you want to know the ID of, and then click on Instance Folder within the context menu.
Now, just copy the name of the folder that opened.
Prism Launcher is still opening after I close Minecraft
Currently, the Close Prism Launcher after game window opens option opens Prism Launcher after closing Minecraft, even when launched from the CLI.
To disable this, open Settings, then select Minecraft, and finally, un-check Close Prism Launcher after game window opens or check Quit the launcher after game window closes.