From a2d2812bd2414796ad2df734e43a52b1824ac4b3 Mon Sep 17 00:00:00 2001
From: Abhinav Sarkar <abhinav@abhinavsarkar.net>
Date: Thu, 27 Oct 2022 11:31:08 +0530
Subject: [PATCH] Adds report-hm-changes script

---
 home.nix                      |  2 +-
 justfile                      |  1 +
 scripts/default.nix           |  7 +++++++
 scripts/report-hm-changes.nix | 13 +++++++++++++
 4 files changed, 22 insertions(+), 1 deletion(-)
 create mode 100644 scripts/default.nix
 create mode 100644 scripts/report-hm-changes.nix

diff --git a/home.nix b/home.nix
index f4b41a8..d92f0a1 100644
--- a/home.nix
+++ b/home.nix
@@ -1,7 +1,7 @@
 { config, pkgs, ... }:
 
 {
-  imports = [ ./programs ./launchd.nix ./nix.nix ];
+  imports = [ ./programs ./scripts ./launchd.nix ./nix.nix ];
 
   home.username = "abhinav";
   home.homeDirectory = "/Users/abhinav";
diff --git a/justfile b/justfile
index 59df00d..03372d0 100644
--- a/justfile
+++ b/justfile
@@ -25,6 +25,7 @@ build: (_run "_build")
 
 _switch:
     home-manager -v switch --flake "{{ root_dir }}#abhinav"
+    report-hm-changes
 
 # switch to latest home-manager generation
 switch: (_run "_switch")
diff --git a/scripts/default.nix b/scripts/default.nix
new file mode 100644
index 0000000..e6716f9
--- /dev/null
+++ b/scripts/default.nix
@@ -0,0 +1,7 @@
+{ config, lib, pkgs, ... }:
+
+let
+  rc = pkgs.callPackage ./report-hm-changes.nix { inherit config pkgs; };
+in {
+  home.packages = [ rc ];
+}
diff --git a/scripts/report-hm-changes.nix b/scripts/report-hm-changes.nix
new file mode 100644
index 0000000..ec4d3b0
--- /dev/null
+++ b/scripts/report-hm-changes.nix
@@ -0,0 +1,13 @@
+{ config, pkgs, ... }:
+
+let
+  profiles = "/nix/var/nix/profiles/per-user/${config.home.username}/home-manager-*-link";
+in
+pkgs.writeShellScriptBin "report-hm-changes" ''
+  # Disable nvd if there are less than 2 hm profiles.
+  if [ $(ls -d1v ${profiles} 2>/dev/null | wc -l) -lt 2 ]; then
+    echo "Skipping changes report..."
+  else
+    ${pkgs.nvd}/bin/nvd diff $(ls -d1v ${profiles} | tail -2)
+  fi
+''