Simple base nix container, which interacts with the host nix daemon (CI/CD?)

docker/nix/default.nix

@@ -0,0 +1,24 @@
+{ pkgs, system, nixpkgs, ... }:
+let
+  bashLib = ../bash-lib;
+  init = pkgs.writeShellScriptBin "init" (builtins.readFile ./init);
+  conf = pkgs.writeText "conf" ''
+    _prog_busybox="${pkgs.busybox}"
+    _prog_bashlib="${bashLib}"
+    _prog_bash="${pkgs.bash}"
+    _prog_nix="${pkgs.nixFlakes}"
+
+    _conf_nixpkgs="${nixpkgs}"
+    _conf_cacert="${pkgs.cacert}"
+    _conf_user_uid="1000"
+    _conf_user_gid="1000"
+  '';
+in
+pkgs.dockerTools.buildLayeredImage {
+  name = "nix";
+  tag = "latest";
+
+  config = {
+    Entrypoint = [ "${init}/bin/init" "${conf}" ];
+  };
+}

docker/nix/init

@@ -0,0 +1,45 @@
+# -*- mode: shell-script; -*-
+
+conf=$1 ; shift 1
+source $conf
+
+source $_prog_bashlib/main.bash
+
+$_prog_busybox/bin/cat << EOF
+### Nix Image Manual
+# You may place a \`main.bash\` file at \`/main.bash\`, if it's there it will be executed, otherwise an interactive shell will be spawned
+
+/nix/var/nix/db
+/nix/var/nix/daemon-socket
+/nix/store-host
+
+EOF
+
+(
+    set -e
+    echo "root:x:0:0:Nix:/:$_prog_bash/bin/bash" > /etc/passwd
+    echo "root:x:0:" > /etc/group
+) || echo_exit "Failed to create user and group!"
+
+mkdir_chown /tmp 0 0
+
+if [[ -d "/nix/store-host" ]]
+then
+    $_prog_busybox/bin/mount -t overlay overlay -o lowerdir=/nix/store:/nix/store-host /nix/store
+    export NIX_REMOTE=daemon
+else
+    echo_exit "You must link the host nix store"
+fi
+
+export PATH=$_prog_bash/bin:$_prog_nix/bin:$_prog_busybox/bin \
+       NIX_PATH=nixpkgs=$_conf_nixpkgs \
+       NIX_SSL_CERT_FILE=$_conf_cacert/etc/ssl/certs/ca-bundle.crt
+
+if [[ -f /main.bash ]]
+then
+    $_prog_bash/bin/bash /main.bash $@
+else
+    $_prog_bash/bin/bash
+fi
+
+# nix --experimental-features 'nix-command flakes' build github:edolstra/dwarffs

flake.nix

@@ -31,7 +31,6 @@
         "klippy"
         "mainsail"
         "moonraker"
-        "rust-runner"
       ];
       pkgs = rlib.pkgsWithFlakes flakes;