# This module provides JAVA_HOME, with a different way to install java # system-wide. { config, lib, pkgs, ... }: with lib; let cfg = config.programs.java; in { options = { programs.java = { enable = mkEnableOption "java" // { description = '' Install and setup the Java development kit. <note> <para>This adds JAVA_HOME to the global environment, by sourcing the jdk's setup-hook on shell init. It is equivalent to starting a shell through 'nix-shell -p jdk', or roughly the following system-wide configuration: </para> <programlisting> environment.variables.JAVA_HOME = ''${pkgs.jdk.home}/lib/openjdk; environment.systemPackages = [ pkgs.jdk ]; </programlisting> </note> ''; }; package = mkOption { default = pkgs.jdk; defaultText = literalExpression "pkgs.jdk"; description = '' Java package to install. Typical values are pkgs.jdk or pkgs.jre. ''; type = types.package; }; }; }; config = mkIf cfg.enable { environment.systemPackages = [ cfg.package ]; environment.shellInit = '' test -e ${cfg.package}/nix-support/setup-hook && source ${cfg.package}/nix-support/setup-hook ''; }; }