Home Managerでfishの環境変数を更新する

-

概要

Home Managerでhome.sessionVariablesを更新しても環境変数が反映されない。

解決方法

home.sessionVariables はログアウト後に反映

Environment variables to always set at login.

  1. home.sessionVariables を編集
  2. home-manager switch を実行
  3. ログアウトして再ログイン

シェル起動時に環境変数を更新

programs.fish.shellInit で set -gx を直接設定する。

疑似コード

let
  env = with xdg; {
    IDRIS2_PREFIX = "${XDG_DATA_HOME}/idris2";
    PACK_DIR = "${XDG_DATA_HOME}/pack";
    # ...
  };
  sessionVariables = builtins.concatStringsSep "\n"
    (map (k: "set -gx ${k} ${env.${k}}") (builtins.attrNames env));
in
{
  # ...
  programs = {
    fish = {
      enable = true;
      shellInit = ''
        ${sessionVariables}
        # ...
      ''
      # ...
    };
  };
}

実行結果

$ head -12 $HOME/.config/fish/config.fish
# ~/.config/fish/config.fish: DO NOT EDIT -- this file has been generated
# automatically by home-manager.

# Only execute this file once per shell.
set -q __fish_home_manager_config_sourced; and exit
set -g __fish_home_manager_config_sourced 1

source /nix/store/lkjzs012wpynhf3x2hnmcrm1im24ilcf-hm-session-vars.fish

set -gx ANDROID_HOME /home/scarf/.local/share/android
set -gx ASDF_CONFIG_FILE /home/scarf/.config/asdf/asdfrc
set -gx ASDF_DATA_DIR /home/scarf/.local/share/asdf

参考