liminix

commit 2a93f24a58da6c70c8e803a6e8eb1397a24c8e71
parent 64898eada866a1ce173edb37686b3564876d3fcb
Author: Daniel Barlow <dan@telent.net>
Date:   Fri,  5 Jan 2024 00:07:01 +0000

add turris "schnapps" tool

in its current state this is useful for turris omnia only, but will
allow us to do installs and rollback to turris os if needed.

Diffstat:
A
modules/schnapps/default.nix
 | 
19
+++++++++++++++++++
M
pkgs/default.nix
 | 
7
+++++++
A
pkgs/schnapps/default.nix
 | 
27
+++++++++++++++++++++++++++

3 files changed, 53 insertions(+), 0 deletions(-)
diff --git a/modules/schnapps/default.nix b/modules/schnapps/default.nix
@@ -0,0 +1,19 @@
+{ config, pkgs, lib, ... } :
+{
+  config = {
+    programs.busybox = {
+      options = {
+        # schnapps is a shell script that needs
+        # [ command
+        # find -maxdepth  -mindepth
+        # head -c
+        # echo -n
+        ASH_TEST = "y";
+        FEATURE_FIND_MAXDEPTH = "y";
+        FEATURE_FANCY_HEAD = "y";
+        FEATURE_FANCY_ECHO = "y";
+      };
+    };
+    defaultProfile.packages = [ pkgs.schnapps ] ;
+  };
+}
diff --git a/pkgs/default.nix b/pkgs/default.nix
@@ -92,6 +92,13 @@ in {
   run-liminix-vm = callPackage ./run-liminix-vm {};
   s6-init-bin =  callPackage ./s6-init-bin {};
   s6-rc-database = callPackage ./s6-rc-database {};
+
+  # schnapps is written by Turris and provides a high-level interface
+  # to btrfs snapshots. It may be useful on the Turris Omnia to
+  # install Liminix while retaining the ability to rollback to the
+  # vendor OS, or even to derisk Liminix updates on that device
+  schnapps = callPackage ./schnapps {};
+
   serviceFns = callPackage ./service-fns {};
   swconfig = callPackage ./swconfig {};
   systemconfig = callPackage ./systemconfig {};
diff --git a/pkgs/schnapps/default.nix b/pkgs/schnapps/default.nix
@@ -0,0 +1,27 @@
+{
+  stdenv
+, fetchFromGitLab
+, makeWrapper
+, btrfs-progs
+, lib
+}:
+let search_path = lib.makeBinPath [btrfs-progs];
+in stdenv.mkDerivation {
+  pname = "schnapps";
+  version = "2.13.0";
+
+  src =fetchFromGitLab {
+    domain = "gitlab.nic.cz";
+    owner = "turris";
+    repo = "schnapps";
+    rev = "53ac92c765d670be4b98dba2c948859a9ac7607f";
+    hash = "sha256-yVgXK+V2wrcOPLB6X6qm3hyBcWcyzNhfJjFF7YRk5Lc=";
+  };
+
+  nativeBuildInputs = [ makeWrapper ];
+  buildPhase = ":";
+  installPhase = ''
+    install -D schnapps.sh $out/bin/schnapps
+    wrapProgram $out/bin/schnapps --prefix PATH : "${search_path}"
+  '';
+}