add charging watchdog

user/.chezmoiscripts/run_onchange_after_battery-charge-watchdog.sh.tmpl

@@ -0,0 +1,33 @@
+{{- if eq .chezmoi.os "linux" -}}
+#!/usr/bin/env bash
+#
+# Enable the battery charge-controller watchdog.
+#
+# Re-runs whenever the unit or the watchdog script changes, so that an
+# already-running instance picks up the new version.
+
+set -e
+[ "${CHEZMOI}" -eq 1 ] || exit 1
+
+# unit hash:   {{ include (joinPath .chezmoi.sourceDir "dot_config/systemd/user/battery-charge-watchdog.service") | sha256sum }}
+# script hash: {{ include (joinPath .chezmoi.sourceDir "dot_config/scripts/executable_battery-charge-watchdog.sh") | sha256sum }}
+
+# Applying from a TTY or a container has no user bus; skip rather than
+# aborting the whole apply.
+if ! systemctl --user show-environment > /dev/null 2>&1; then
+	echo "No systemd user session, skipping battery-charge-watchdog activation"
+	exit 0
+fi
+
+systemctl --user daemon-reload
+
+# The unit carries ConditionPathExists on the battery, so enabling it on a
+# machine without one is harmless: it simply never starts.
+systemctl --user enable --now battery-charge-watchdog.service
+
+# enable --now will not restart an instance that is already running, so an
+# updated script or unit would otherwise not take effect until next login.
+systemctl --user try-restart battery-charge-watchdog.service
+
+# vim: syntax=bash ft=template
+{{- end -}}