feat: build CouchOS Melee appliance

scripts/configure_display_audio.sh

@@ -0,0 +1,85 @@
+#!/usr/bin/env bash
+set -Eeuo pipefail
+
+log() {
+  printf '[display-audio] %s\n' "$*"
+}
+
+warn() {
+  printf '[display-audio] WARN: %s\n' "$*" >&2
+  logger -t couch-display-audio -- "$*" 2>/dev/null || true
+}
+
+pick_hdmi_refresh() {
+  awk '
+    $1 == "HDMI-1" && $2 == "connected" { in_hdmi=1; next }
+    in_hdmi && $0 !~ /^[[:space:]]/ { exit }
+    in_hdmi && $1 == "1920x1080" {
+      for (i = 2; i <= NF; i++) {
+        gsub(/[+*]/, "", $i)
+        if ($i ~ /^[0-9]+(\.[0-9]+)?$/) {
+          value = $i + 0
+          if (value > best) {
+            best = value
+            best_text = $i
+          }
+        }
+      }
+    }
+    END {
+      if (best_text != "") {
+        print best_text
+      }
+    }
+  '
+}
+
+choose_hdmi_profile() {
+  pactl list cards | awk '
+    /^Card #[0-9]+/ { card="" }
+    /^\tName: / { sub(/^\tName: /, "", $0); card=$0 }
+    /^\t\toutput:hdmi/ && /available: yes/ {
+      profile=$1
+      sub(/:$/, "", profile)
+      print card "\t" profile
+      exit
+    }
+  '
+}
+
+choose_hdmi_sink() {
+  pactl list short sinks | awk '$2 ~ /\.hdmi/ { print $2; exit }'
+}
+
+xrandr_output="$(xrandr --query)"
+if ! grep -q '^HDMI-1 connected' <<<"${xrandr_output}"; then
+  warn "HDMI-1 is not connected; deferring display/audio switch"
+  exit 0
+fi
+
+refresh="$(printf '%s\n' "${xrandr_output}" | pick_hdmi_refresh)"
+if [[ -z "${refresh}" ]]; then
+  warn "HDMI-1 is connected but no 1920x1080 refresh was discovered"
+  exit 0
+fi
+
+log "setting HDMI-1 primary at 1920x1080@${refresh} and disabling eDP-1"
+xrandr --output HDMI-1 --primary --mode 1920x1080 --rate "${refresh}" --output eDP-1 --off
+
+profile_line="$(choose_hdmi_profile || true)"
+if [[ -z "${profile_line}" ]]; then
+  warn "HDMI audio sink/profile not available yet; display configured and audio switch deferred"
+  exit 0
+fi
+
+card_name="${profile_line%%$'\t'*}"
+profile_name="${profile_line#*$'\t'}"
+log "selecting HDMI audio profile ${profile_name} on ${card_name}"
+pactl set-card-profile "${card_name}" "${profile_name}"
+pactl list short sinks >/dev/null 2>&1 || true
+sink_name="$(choose_hdmi_sink || true)"
+if [[ -z "${sink_name}" ]]; then
+  warn "HDMI sink still unavailable after profile switch; audio switch deferred"
+  exit 0
+fi
+pactl set-default-sink "${sink_name}"