<>: Adding build script to switch configs

1 files changed, 29 insertions, 0 deletions

diff --git a/build b/build
new file mode 100755
index 00000000000..9432a802d13
--- /dev/null
+++ b/build
@@ -0,0 +1,29 @@
+#!/bin/sh
+
+set -eo pipefail
+
+DIR=$(dirname $0)
+D=$(mktemp -du)
+ROOT="$DIR/roots/$(hostname).nix"
+
+function build {
+    NIXPKGS_ALLOW_UNFREE=1 \
+            nix build -f '<nixpkgs/nixos>' config.system.build \
+            -I nixos-config="$ROOT" \
+            -I "nixpkgs=$DIR/nixpkgs" \
+            -I "nixpkgs-overlays=$DIR/overlays" \
+            -I "home-manager=$DIR/home-manager" \
+            --out-link "$D"
+}
+
+function switch {
+    build $ROOT
+    $D-18/activate
+}
+
+case "$1" in
+    -s* | --switch*) switch ;;
+    *)               build ;;
+esac
+
+rm -rf $D*