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path: root/modules/home-manager/personal/programs/devenv.nix
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{
  config,
  lib,
  pkgs,
  ...
}:
let
  cfg = config.personal.programs.devenv;
  importedDevenv = pkgs ? devenv;
  devenvUpdateScript = pkgs.callPackage (
    {
      bash,
      devenv,
      direnv,
      findutils,
      git,
      gnugrep,
      nix,
    }:
    pkgs.writeShellApplication {
      name = "devenv-update";

      runtimeInputs = [
        bash
        devenv
        direnv
        findutils
        git
        gnugrep
        nix
      ];

      text = ''
        find . -name '.envrc' -execdir bash -c '
            if [[ $(direnv status | grep "Found RC allowed 0") ]]
            then
              echo Updating shell $(pwd)...
              devenv update
              devenv shell echo Shell $(pwd) updated!
              echo
            fi
          ' \;
      '';
    }
  ) { devenv = pkgs.devenv; };
in
{
  options.personal.programs.devenv.enable = lib.mkEnableOption "devenv";

  config = lib.mkIf cfg.enable {
    assertions = [
      {
        assertion = importedDevenv;
        message = "package devenv missing: add it in a nixpkgs overlay, or set config.personal.devenv.enable to false";
      }
    ];
    home.packages = lib.optional importedDevenv pkgs.devenv;

    systemd.user = lib.mkMerge [
      (pkgs.lib.personal.services.home.serviceWithTimer "devenv-update" {
        Unit = {
          Description = "Update devenv shells";
          After = [
            "network-online.target"
          ];
        };
        Service = {
          Type = "oneshot";
          WorkingDirectory = "${config.home.homeDirectory}";
          ExecStart = "${devenvUpdateScript}/bin/devenv-update";
        };
        Timer = {
          Persistent = true;
          OnCalendar = "daily";
        };
        Install = {
          WantedBy = [ "default.target" ];
        };
      })
      ({
        services.devenv-update = pkgs.lib.personal.services.home.checkNetwork {
          hosts = [ "github.com" ];
          restart = true;
        };
      })
    ];
  };
}