#!/bin/sh
# bump-build.sh - Increment the MontaukOS kernel build number.
#
# Reads the current MONTAUK_BUILD_NUMBER from the given header, increments it,
# and rewrites the header in place. Invoked by kernel/GNUmakefile whenever the
# kernel or userspace sources change, so the build number reflects real builds.
#
# Usage: ./scripts/bump-build.sh <path-to-BuildNo.hpp>

set -e

HDR="$1"
if [ -z "$HDR" ] || [ ! -f "$HDR" ]; then
    echo "bump-build.sh: header not found: $HDR" >&2
    exit 1
fi

cur=$(sed -n 's/^#define MONTAUK_BUILD_NUMBER \([0-9][0-9]*\).*/\1/p' "$HDR")
if [ -z "$cur" ]; then
    echo "bump-build.sh: could not parse MONTAUK_BUILD_NUMBER in $HDR" >&2
    exit 1
fi

next=$((cur + 1))

cat > "$HDR" <<EOF
/*
    * BuildNo.hpp
    * Monotonic kernel build number.
    *
    * This file is the source of truth for the build number. It is regenerated
    * (incremented) by scripts/bump-build.sh whenever the kernel or userspace
    * sources change, via a rule in kernel/GNUmakefile. Do not edit the number
    * by hand; the build system manages it.
    *
    * Copyright (c) 2026 Daniel Hammer
*/

#pragma once

#define MONTAUK_BUILD_NUMBER $next
EOF

echo "  BUILD   $cur -> $next"