From eb5815048f1be578e72ece4a4fd8d5525e00d467 Mon Sep 17 00:00:00 2001
From: Tom Alexander <tom@fizz.buzz>
Date: Sat, 9 Aug 2025 20:27:27 -0400
Subject: [PATCH] Add a check and uninstall phase.

---
 .../util/install_files/default.nix            | 68 ++++++++++++-------
 1 file changed, 42 insertions(+), 26 deletions(-)

diff --git a/nix/configuration/util/install_files/default.nix b/nix/configuration/util/install_files/default.nix
index 486a74a..ecdee39 100644
--- a/nix/configuration/util/install_files/default.nix
+++ b/nix/configuration/util/install_files/default.nix
@@ -14,6 +14,14 @@ let
     ;
 
   install_user_file =
+    let
+      constructors = {
+        "overwrite" = install_user_file_overwrite;
+        "symlink" = install_user_file_symlink;
+      };
+    in
+    stage: target: (constructors."${target.method}"."${stage}" target);
+  old_install_user_file =
     let
       constructors = {
         "overwrite" = install_user_file_overwrite;
@@ -21,27 +29,35 @@ let
       };
     in
     (target: (constructors."${target.method}" target));
-  install_user_file_overwrite =
-    target:
-    let
-      source = lib.strings.escapeShellArg "${target.source}";
-      destination = lib.strings.escapeShellArg "${target.target}";
-      mode = lib.strings.escapeShellArg "${target.mode}";
-    in
-    # $DRY_RUN_CMD ${pkgs.toyboy}/bin/install $VERBOSE_ARG -D -m ${mode} ${source} ${destination}
-    ''
-      $DRY_RUN_CMD install $VERBOSE_ARG -D --compare -m ${mode} ${source} ${destination}
-    '';
-  install_user_file_symlink =
-    target:
-    let
-      source = lib.strings.escapeShellArg "${target.source}";
-      destination = lib.strings.escapeShellArg "${target.target}";
-      mode = lib.strings.escapeShellArg "${target.mode}";
-    in
-    ''
-      $DRY_RUN_CMD ln $VERBOSE_ARG -s ${source} ${destination}
-    '';
+  install_user_file_overwrite = {
+    "check" = (target: "");
+    "install" = (
+      target:
+      let
+        source = lib.strings.escapeShellArg "${target.source}";
+        destination = lib.strings.escapeShellArg "${target.target}";
+        mode = lib.strings.escapeShellArg "${target.mode}";
+      in
+      ''
+        $DRY_RUN_CMD install $VERBOSE_ARG -D --compare -m ${mode} ${source} ${destination}
+      ''
+    );
+    "uninstall" = (target: "");
+  };
+  install_user_file_symlink = {
+    "check" = (target: "");
+    "install" = (
+      target:
+      let
+        source = lib.strings.escapeShellArg "${target.source}";
+        destination = lib.strings.escapeShellArg "${target.target}";
+      in
+      ''
+        $DRY_RUN_CMD ln $VERBOSE_ARG -s ${source} ${destination}
+      ''
+    );
+    "uninstall" = (target: "");
+  };
 in
 {
   imports = [ ];
@@ -141,7 +157,9 @@ in
         builtins.map (user: (builtins.map (path: user.file."${path}") (attrNames user.file))) enabled_users
       );
       enabled_file_targets = filter (target: target.enable) all_file_targets;
-      install_commands = builtins.map install_user_file enabled_file_targets;
+      check_commands = builtins.map (install_user_file "check") enabled_file_targets;
+      install_commands = builtins.map (install_user_file "install") enabled_file_targets;
+      uninstall_commands = builtins.map (install_user_file "uninstall") enabled_file_targets;
     in
     {
       systemd.services.me-install-file = {
@@ -158,10 +176,8 @@ in
           Type = "oneshot";
           RemainAfterExit = "yes";
         };
-        script = (lib.strings.concatStringsSep "\n" install_commands);
-        # preStop = ''
-        #   rm -f /home/talexander/.docker/config.json
-        # '';
+        script = (lib.strings.concatStringsSep "\n" (check_commands ++ install_commands));
+        preStop = (lib.strings.concatStringsSep "\n" uninstall_commands);
       };
 
       environment.etc."install_out".text = config.systemd.services.me-install-file.script;