#!/usr/bin/env bash
# Summarize sound/soc diffs between ChromiumOS 5.15 tree and Ubuntu HWE 6.17 source tree.
set -euo pipefail
SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
REPO_ROOT="$(cd "$SCRIPT_DIR/.." && pwd)"
CH="${CH:-$REPO_ROOT/chromiumos_kernel/v5.15}"
UB="${UB:-$REPO_ROOT/kernel-src/linux-hwe-6.17-6.17.0}"

if [[ ! -d "$CH/sound/soc" || ! -d "$UB/sound/soc" ]]; then
  echo "ERROR: need both trees:" >&2
  echo "  CH=$CH" >&2
  echo "  UB=$UB" >&2
  exit 1
fi

echo "=== Git shallow check (ChromeOS tree) ==="
if [[ -d "$CH/.git" ]]; then
  (cd "$CH" && echo "HEAD: $(git rev-parse --short HEAD)" && echo "commits reachable: $(git rev-list --count HEAD 2>/dev/null || echo '?')")
else
  echo "(no .git under CH)"
fi

echo ""
echo "=== diff -rq file-level counts ==="
echo -n "sound/soc/sof/intel: "
( diff -rq "$CH/sound/soc/sof/intel" "$UB/sound/soc/sof/intel" 2>/dev/null || true ) | wc -l
echo -n "sound/soc/intel/boards: "
( diff -rq "$CH/sound/soc/intel/boards" "$UB/sound/soc/intel/boards" 2>/dev/null || true ) | wc -l

echo ""
echo "=== diff -u line counts (Kaisa / HDMI / IPC focus) ==="
FILES=(
  sound/soc/intel/boards/sof_board_helpers.c
  sound/soc/intel/boards/sof_rt5682.c
  sound/soc/sof/intel/cnl.c
  sound/soc/sof/intel/hda-ipc.c
  sound/soc/sof/intel/hda-dai.c
  sound/soc/sof/intel/hda-dsp.c
  sound/soc/sof/pcm.c
  sound/soc/sof/ipc3.c
)
for f in "${FILES[@]}"; do
  if [[ -f "$CH/$f" && -f "$UB/$f" ]]; then
    n=$( ( diff -u "$CH/$f" "$UB/$f" || true ) | wc -l )
    printf '%6s  %s\n' "$n" "$f"
  else
    printf '%6s  %s (missing)\n' "-" "$f"
  fi
done

echo ""
echo "Done. Full unified diffs: diff -u \"\$CH/<path>\" \"\$UB/<path>\" | less"