# Enforce XDG directory spec for configuration files
{ pkgs }:
{
  XDG_CACHE_HOME = "$HOME/.cache";
  XDG_CONFIG_HOME = "$HOME/.config";
  XDG_DATA_HOME = "$HOME/.local/share";
  XDG_STATE_HOME = "$HOME/.local/state";

  XDG_DATA_DIRS = [
    "${pkgs.gsettings-desktop-schemas}/share/gsettings-schemas/${pkgs.gsettings-desktop-schemas.name}"
    "${pkgs.gtk3}/share/gsettings-schemas/${pkgs.gtk3.name}"
  ];

  # Android
  ANDROID_USER_HOME = "$XDG_DATA_HOME/android";

  # Azure
  AZURE_CONFIG_DIR = "$XDG_DATA_HOME/azure";

  # NodeJS / npm
  NPM_CONFIG_INIT_MODULE = "$XDG_CONFIG_HOME/npm/config/npm-init.js";
  NPM_CONFIG_CACHE = "$XDG_CACHE_HOME/npm";
  NPM_CONFIG_TMP = "$XDG_RUNTIME_DIR/npm";

  # Java
  _JAVA_OPTIONS = "-Djava.util.prefs.userRoot=$XDG_CONFIG_HOME/java";

  # Python
  PYTHON_HISTORY = "$XDG_STATE_HOME/python_history";

  # BASH
  HISTFILE = "$XDG_STATE_HOME/bash/history";

  # .NET
  DOTNET_ROOT = "${pkgs.dotnet-sdk}/share/dotnet";
  DOTNET_CLI_HOME = "$XDG_DATA_HOME/dotnet";

  # GTK
  GTK2_RC_FILES = "$XDG_CONFIG_HOME/gtk-2.0/gtkrc";
}