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home-manager/modules/programs/java.nix
Jacob Birkett e716961d78
modules: java: fix setting JAVA_HOME (#3638)
Some JVMs pass through `home` as a derivation rather than as a string, as `openjdk` does. Since the module option for session variables expects a string, this is a type error. I suspect that this incorrect, and have changed the assignment here to coerce the `cfg.package.home` attribute to a string to be safe.

After discussing with @NobbZ, we have decided it is best to mitigate this problem in HM rather than to make potentially breaking changes to Nixpkgs.

Please do mention if you think we ought to propose a change to Nixpkgs instead.
2023-02-05 11:02:57 +01:00

43 lines
1.1 KiB
Nix

# This module provides JAVA_HOME, with a different way to install java locally.
# This module is modified from the NixOS module `programs.java`
{ config, lib, pkgs, ... }:
with lib;
let
cfg = config.programs.java;
in {
meta.maintainers = with maintainers; [ ShamrockLee ];
options = {
programs.java = {
enable = mkEnableOption "" // {
description = ''
Install the Java development kit and set the <envar>JAVA_HOME</envar>
variable.
'';
};
package = mkOption {
type = types.package;
default = pkgs.jdk;
defaultText = "pkgs.jdk";
description = ''
Java package to install. Typical values are
<literal>pkgs.jdk</literal> or <literal>pkgs.jre</literal>.
'';
};
};
};
config = mkIf cfg.enable {
home.packages = [ cfg.package ];
# some instances of `jdk-linux-base.nix` pass through `result` without turning it onto a path-string.
# while I suspect this is incorrect, the documentation is unclear.
home.sessionVariables.JAVA_HOME = "${cfg.package.home}";
};
}