From 878dc5f386668f453332a2bfe195ca52ffd52224 Mon Sep 17 00:00:00 2001
From: Harald Hoyer <harald@hoyer.xyz>
Date: Thu, 21 Mar 2024 14:32:53 +0100
Subject: [PATCH] rot8000

Signed-off-by: Harald Hoyer <harald@hoyer.xyz>
---
 .gitattributes                          |  1 +
 modules/home/tools/git/default.nix      |  4 ++
 modules/nixos/services/base/default.nix | 21 ++++++++--
 packages/rot8000/Cargo.lock             | 54 +++++++++++++++++++++++++
 packages/rot8000/default.nix            | 28 +++++++++++++
 5 files changed, 105 insertions(+), 3 deletions(-)
 create mode 100644 .gitattributes
 create mode 100644 packages/rot8000/Cargo.lock
 create mode 100644 packages/rot8000/default.nix

diff --git a/.gitattributes b/.gitattributes
new file mode 100644
index 0000000..b5040d3
--- /dev/null
+++ b/.gitattributes
@@ -0,0 +1 @@
+systems/x86_64-linux/mx/mailserver.nix text filter=rot8000
diff --git a/modules/home/tools/git/default.nix b/modules/home/tools/git/default.nix
index e72d040..b48c5a5 100644
--- a/modules/home/tools/git/default.nix
+++ b/modules/home/tools/git/default.nix
@@ -56,6 +56,10 @@ in
         interactive.diffFilter = "${pkgs.delta}/bin/delta --color-only";
         merge.conflictStyle = "diff3";
         diff.colorMoved = "default";
+        filter.rot8000 = {
+          clean = "${pkgs.metacfg.rot8000}/bin/rot8000";
+          smudge = "${pkgs.metacfg.rot8000}/bin/rot8000";
+        };
       };
     };
   };
diff --git a/modules/nixos/services/base/default.nix b/modules/nixos/services/base/default.nix
index f892988..18493d3 100644
--- a/modules/nixos/services/base/default.nix
+++ b/modules/nixos/services/base/default.nix
@@ -1,8 +1,18 @@
-{ options, config, lib, pkgs, ... }:
-
+{ options
+, config
+, lib
+, pkgs
+, ...
+}:
 with lib;
 with lib.metacfg;
-let cfg = config.metacfg.base;
+let
+  cfg = config.metacfg.base;
+  gitconfig = pkgs.writeText "gitconfig" ''
+    [filter "rot8000"]
+        smudge = ${pkgs.metacfg.rot8000}/bin/rot8000
+        clean = ${pkgs.metacfg.rot8000}/bin/rot8000
+  '';
 in
 {
   options.metacfg.base = with types; {
@@ -38,6 +48,7 @@ in
         delta
         efibootmgr
         git
+        git-crypt
         git-delete-merged-branches
         home-manager
         htop
@@ -137,6 +148,10 @@ in
       ];
       flake = "git+https://git.hoyer.xyz/harald/nixcfg";
     };
+    systemd.services.nixos-upgrade = {
+      path = [ pkgs.metacfg.rot8000 ];
+      environment.GIT_CONFIG_GLOBAL = toString gitconfig;
+    };
 
     virtualisation.libvirtd.enable = true;
 
diff --git a/packages/rot8000/Cargo.lock b/packages/rot8000/Cargo.lock
new file mode 100644
index 0000000..9fc021d
--- /dev/null
+++ b/packages/rot8000/Cargo.lock
@@ -0,0 +1,54 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "aho-corasick"
+version = "1.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8e60d3430d3a69478ad0993f19238d2df97c507009a52b3c10addcd7f6bcb916"
+dependencies = [
+ "memchr",
+]
+
+[[package]]
+name = "memchr"
+version = "2.7.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "523dc4f511e55ab87b694dc30d0f820d60906ef06413f93d4d7a1385599cc149"
+
+[[package]]
+name = "regex"
+version = "1.10.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b62dbe01f0b06f9d8dc7d49e05a0785f153b00b2c227856282f671e0318c9b15"
+dependencies = [
+ "aho-corasick",
+ "memchr",
+ "regex-automata",
+ "regex-syntax",
+]
+
+[[package]]
+name = "regex-automata"
+version = "0.4.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "86b83b8b9847f9bf95ef68afb0b8e6cdb80f498442f5179a29fad448fcc1eaea"
+dependencies = [
+ "aho-corasick",
+ "memchr",
+ "regex-syntax",
+]
+
+[[package]]
+name = "regex-syntax"
+version = "0.8.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c08c74e62047bb2de4ff487b251e4a92e24f48745648451635cec7d591162d9f"
+
+[[package]]
+name = "rot8000"
+version = "0.1.0"
+dependencies = [
+ "regex",
+]
diff --git a/packages/rot8000/default.nix b/packages/rot8000/default.nix
new file mode 100644
index 0000000..b4483b2
--- /dev/null
+++ b/packages/rot8000/default.nix
@@ -0,0 +1,28 @@
+{ lib
+, stdenv
+, rustPlatform
+, fetchFromGitHub
+, ...
+}:
+rustPlatform.buildRustPackage rec {
+  pname = "rot8000";
+  version = "0.0.1";
+
+  src = fetchFromGitHub {
+    owner = "haraldh";
+    rev = "3e3c4e4d6ed5b572ca2b09c8dc7f5bc3bd86e554";
+    repo = "mailsmudge";
+    sha256 = "sha256-4cG4Mn94lewxj1qstor8R0xLWIBFxf0rOHTMxzgHyFQ=";
+  };
+
+  cargoLock = {
+    lockFile = ./Cargo.lock;
+  };
+
+  meta = with lib; {
+    description = "mailsmudge";
+    homepage = "https://github.com/haraldh/mailsmudge";
+    license = licenses.unlicense;
+    maintainers = [ maintainers.tailhook ];
+  };
+}