#!/command/with-contenv sh
# shellcheck shell=sh
# Toggle the dashboard s6-rc service slot based on HERMES_DASHBOARD.
#
# Runs as root in cont-init.d, after 01-hermes-setup (stage2) and
# 02-reconcile-profiles, BEFORE s6-rc starts user services.
#
# Background (PR #30136 review item I3): the dashboard service was
# always declared as an s6-rc longrun, with its run script checking
# HERMES_DASHBOARD and `exec sleep infinity` when unset. Trouble:
# s6-svstat then reports the dashboard slot as "up" (because sleep
# IS running) even though no dashboard process exists. `hermes
# doctor` and any other s6-svstat-based health check sees a
# false-positive up-state.
#
# Fix: write a `down` marker file into the live service-dir when
# HERMES_DASHBOARD is unset / falsy. s6-supervise honors `down` by
# not starting the service at all, so s6-svstat reports `down` —
# matching reality.
#
# The run script's HERMES_DASHBOARD case-statement stays in place
# as a belt-and-suspenders guard: even if the down marker is
# removed at runtime and the service is brought up, the run script
# still bails when HERMES_DASHBOARD is unset. Both layers agree.

set -eu

# Live service directory for the dashboard longrun. s6-overlay
# compiles /etc/s6-overlay/s6-rc.d/dashboard/ into this location
# at boot, before cont-init.d scripts run.
DASHBOARD_LIVE_DIR="/run/service/dashboard"

# If the live directory hasn't materialized yet (e.g. running in a
# stripped-down test image), nothing to do — the run script's env
# check still keeps things safe.
if [ ! -d "$DASHBOARD_LIVE_DIR" ]; then
    echo "[dashboard-toggle] $DASHBOARD_LIVE_DIR not present; skipping"
    exit 0
fi

case "${HERMES_DASHBOARD:-}" in
    1|true|TRUE|True|yes|YES|Yes)
        # Enabled — remove any leftover down marker from a previous boot.
        if [ -e "$DASHBOARD_LIVE_DIR/down" ]; then
            rm -f "$DASHBOARD_LIVE_DIR/down"
            echo "[dashboard-toggle] HERMES_DASHBOARD enabled; removed down marker"
        fi
        ;;
    *)
        # Disabled — write a down marker so s6-supervise won't start
        # the service. s6-svstat will report it as down, matching reality.
        touch "$DASHBOARD_LIVE_DIR/down"
        echo "[dashboard-toggle] HERMES_DASHBOARD unset; marked dashboard slot down"
        ;;
esac