1 files changed, 33 insertions, 0 deletions
diff --git a/nix/switch.sh b/nix/switch.sh
new file mode 100644
index 0000000..ce63855
--- /dev/null
+++ b/nix/switch.sh
@@ -0,0 +1,33 @@
+#!/usr/bin/env bash
+set -euo pipefail
+root=$(cd "$(dirname "$0")/.." && pwd)
+cd "$root"
+source "$root/just-lib.sh"
+profile=$(_machine_role)
+if ! command -v nix >/dev/null 2>&1; then
+  [[ $profile != canonical ]] || {
+    echo 'Install upstream Nix first.' >&2
+    exit 1
+  }
+  echo 'Nix is not installed; skipping Home-Manager.' >&2
+  exit 0
+fi
+if [[ -n ${1:-} && $profile != "$1" ]]; then
+  echo "error: expected role $1, got $profile" >&2
+  exit 1
+fi
+export USER="${USER:-$(id -un)}"
+export HOME="${HOME:?HOME must be set}"
+generation=$(sh "$root/nix/with-github-auth.sh" \
+  nix --extra-experimental-features 'nix-command flakes' build --impure \
+  --no-link --print-out-paths "$root/nix#homeConfigurations.$profile.activationPackage")
+HOME_MANAGER_BACKUP_EXT=backup "$generation/activate"
+if [[ $profile != canonical ]]; then
+  shell="$HOME/.nix-profile/bin/zsh"
+  if ! grep -qxF "$shell" /etc/shells; then
+    printf '%s\n' "$shell" | sudo tee -a /etc/shells >/dev/null
+  fi
+  if [[ $(getent passwd "$USER" | cut -d: -f7) != "$shell" ]]; then
+    sudo chsh -s "$shell" "$USER"
+  fi
+fi