#!/usr/bin/env bash
set -euo pipefail

# Lists "knobs" that easily cause benchmark drift:
# - bench_profile defaults (core/bench_profile.h)
# - getenv-based gates (core/**)
# - cleanenv forced OFF/ON (scripts/*cleanenv*.sh + allocator matrix scripts)
#
# Usage:
#   scripts/list_hakmem_knobs.sh

root_dir="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
cd "${root_dir}"

if ! command -v rg >/dev/null 2>&1; then
  echo "[list_hakmem_knobs] ripgrep (rg) not found" >&2
  exit 1
fi

print_block() {
  local title="$1"
  echo ""
  echo "== ${title} =="
}

uniq_sort() {
  sort -u | sed '/^$/d'
}

print_block "bench_profile defaults (core/bench_profile.h)"
rg -n 'bench_setenv_default\("HAKMEM_[A-Z0-9_]+",' core/bench_profile.h \
  | rg -o 'HAKMEM_[A-Z0-9_]+' \
  | uniq_sort

print_block "getenv gates (core/**)"
rg -n 'getenv\("HAKMEM_[A-Z0-9_]+"\)' core \
  | rg -o 'HAKMEM_[A-Z0-9_]+' \
  | uniq_sort

print_block "cleanenv forced exports (scripts/*cleanenv*.sh)"
rg -n 'export HAKMEM_[A-Z0-9_]+=|unset HAKMEM_[A-Z0-9_]+' scripts \
  | rg -o 'HAKMEM_[A-Z0-9_]+' \
  | uniq_sort

print_block "allocator matrix scripts (scripts/run_allocator_*matrix*.sh)"
rg -n 'export HAKMEM_[A-Z0-9_]+=|HAKMEM_PROFILE=|LD_PRELOAD=' scripts/run_allocator_*matrix*.sh \
  | rg -o 'HAKMEM_[A-Z0-9_]+' \
  | uniq_sort

echo ""
echo "Done."