Pause backup scheduling and atomically deploy workstation updates

scripts/install.sh

@@ -20,9 +20,6 @@ EXISTING_CONFIG=false
 
 mkdir -p "${HOME}/.local/libexec" "$BIN_DIR" "$CONFIG_DIR" "$STATE_DIR/logs" "$SYSTEMD_USER_DIR"
 
-install -m 0750 "$ROOT_DIR/scripts/nextcloud-borg-runner.py" "${HOME}/.local/libexec/nextcloud-borg-runner.py"
-install -m 0750 "$ROOT_DIR/scripts/nextcloud-borg-backup" "$BIN_DIR/nextcloud-borg-backup"
-
 if [[ ! -f "$CONFIG_DIR/config" ]]; then
   install -m 0600 "$ROOT_DIR/etc/config.example" "$CONFIG_DIR/config"
   printf 'Installed config: %s\n' "$CONFIG_DIR/config"
@@ -60,8 +57,19 @@ if [[ ! -f "$KEY_PATH" ]]; then
   printf 'Store a copy of this passphrase somewhere safe for disaster recovery.\n'
 fi
 
+# Prevent a pending timer event from starting between replacing wrapper and runner.
+if systemctl --user cat nextcloud-borg-backup.service >/dev/null 2>&1; then
+  systemctl --user stop nextcloud-borg-backup.service nextcloud-borg-backup.timer
+fi
+atomic_install() {
+  install -m "$3" "$1" "$2.new"
+  mv -f "$2.new" "$2"
+}
+atomic_install "$ROOT_DIR/scripts/nextcloud-borg-runner.py" "${HOME}/.local/libexec/nextcloud-borg-runner.py" 0750
+atomic_install "$ROOT_DIR/scripts/nextcloud-borg-backup" "$BIN_DIR/nextcloud-borg-backup" 0750
+
 for unit in nextcloud-borg-backup.service nextcloud-borg-backup.timer nextcloud-borg-health.service nextcloud-borg-health.timer; do
-  install -m 0644 "$ROOT_DIR/systemd/user/$unit" "$SYSTEMD_USER_DIR/$unit"
+  atomic_install "$ROOT_DIR/systemd/user/$unit" "$SYSTEMD_USER_DIR/$unit" 0644
 done
 systemctl --user daemon-reload
 systemctl --user enable nextcloud-borg-backup.timer nextcloud-borg-health.timer