home: devenv: update envs when nixos-upgrading

1 files changed, 55 insertions, 0 deletions

diff --git a/modules/home-manager/personal/programs/devenv.nix b/modules/home-manager/personal/programs/devenv.nix
index dbe5aab..29494f9 100644
--- a/modules/home-manager/personal/programs/devenv.nix
+++ b/modules/home-manager/personal/programs/devenv.nix
@@ -7,6 +7,40 @@
 let
   cfg = config.personal.programs.devenv;
   importedDevenv = pkgs ? devenv;
+  devenvUpdateScript = pkgs.callPackage (
+    {
+      bash,
+      devenv,
+      direnv,
+      findutils,
+      git,
+      gnugrep,
+    }:
+    pkgs.writeShellApplication {
+      name = "devenv-update";
+
+      runtimeInputs = [
+        bash
+        devenv
+        direnv
+        findutils
+        git
+        gnugrep
+      ];
+
+      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 $(pwd) updated!
+              echo
+            fi
+          ' \;
+      '';
+    }
+  ) { devenv = pkgs.devenv; };
 in
 {
   options.personal.programs.devenv.enable = lib.mkEnableOption "devenv";
@@ -19,5 +53,26 @@ in
       }
     ];
     home.packages = lib.optional importedDevenv pkgs.devenv;
+
+    systemd.user = pkgs.personal.lib.homeManager.serviceWithTimer "devenv-update" {
+      Unit = {
+        Description = "Update devenv shells";
+        After = [
+          "network-online.target"
+        ];
+      };
+      Service = {
+        Type = "oneshot";
+        WorkingDirectory = "${config.home.homeDirectory}";
+        ExecStart = "${devenvUpdateScript}/bin/devenv-update";
+      };
+      Timer = {
+        Persistent = true;
+        OnCalendar = "daily";
+      };
+      Install = {
+        WantedBy = [ "default.target" ];
+      };
+    };
   };
 }