#!/bin/bash
# Build lmcp_<ver>_all.deb from this directory using dpkg-deb directly.
# Run from inside the runner container, which has dpkg installed.
#
# This avoids dh/debhelper to keep the build simple and runnable on a
# non-Debian builder. The resulting .deb is structurally a normal apt
# package (Architecture: all, depends on lua + lua-socket).
set -euo pipefail

# Debian-conventional pre-release notation: 1.0.0~rc1 sorts BEFORE 1.0.0.
# Upstream tag is v1.0.0-rc1 (with dash); UPSTREAM_TAG drives the source URL,
# PKGVER feeds the Debian package version field.
PKGVER=1.0.0~rc1
UPSTREAM_TAG=v1.0.0-rc1
PKGREL=1
LMCP_TARBALL_SHA256=81f9222264371735c196664382460261ef60a259348766bbd6fd2f49ea9d1e7e
HERE=$(dirname "$(readlink -f "$0")")

# Reproducible build: pin all file mtimes + ar member timestamps to a fixed
# epoch tied to this packaging release (lmcp v0.3.0 — 2026-04-14 22:00 UTC).
# Without this, repeat builds produce different byte streams and reprepro
# refuses re-includes with "size expected: X, got: Y".
export SOURCE_DATE_EPOCH=1776677688

work=$(mktemp -d)
trap "rm -rf $work" EXIT

cd "$work"
curl -sSLfo lmcp.tar.gz "https://git.reauktion.de/marfrit/lmcp/archive/${UPSTREAM_TAG}.tar.gz"
echo "$LMCP_TARBALL_SHA256  lmcp.tar.gz" | sha256sum -c
tar xzf lmcp.tar.gz

ROOT="$work/pkgroot"
mkdir -p "$ROOT/DEBIAN" \
         "$ROOT/usr/share/lua/5.4" \
         "$ROOT/usr/bin" \
         "$ROOT/usr/share/doc/lmcp"

cp lmcp/lmcp.lua   "$ROOT/usr/share/lua/5.4/"
cp lmcp/json.lua   "$ROOT/usr/share/lua/5.4/"
cp lmcp/server.lua "$ROOT/usr/share/lua/5.4/"
cp lmcp/hub.lua    "$ROOT/usr/share/lua/5.4/"
mkdir -p "$ROOT/usr/share/doc/lmcp/examples"
cp lmcp/examples/lmcp-hub.service          "$ROOT/usr/share/doc/lmcp/examples/"
    cp lmcp/examples/lmcp.service              "$ROOT/usr/share/doc/lmcp/examples/"
cp lmcp/examples/hub-backends.conf.example "$ROOT/usr/share/doc/lmcp/examples/"
install -m 755 lmcp/example_server.lua "$ROOT/usr/bin/lmcp-example"
cp lmcp/README.md  "$ROOT/usr/share/doc/lmcp/"
cp "$HERE/debian/copyright" "$ROOT/usr/share/doc/lmcp/copyright"
cp "$HERE/debian/changelog" "$ROOT/usr/share/doc/lmcp/changelog.Debian"
gzip -9 -n "$ROOT/usr/share/doc/lmcp/changelog.Debian"

cat > "$ROOT/DEBIAN/control" <<EOF
Package: lmcp
Version: ${PKGVER}-${PKGREL}
Section: net
Priority: optional
Architecture: all
Depends: lua5.4 | lua5.3 | lua, lua-socket
Maintainer: Markus Fritsche <mfritsche@reauktion.de>
Homepage: https://git.reauktion.de/marfrit/lmcp
Description: Lightweight MCP server in pure Lua
 lmcp is a small Model Context Protocol server written in Lua. It exposes
 user-defined tools over HTTP for use by AI agents.
 .
 Library files install to /usr/share/lua/5.4/. The example server is
 available as /usr/bin/lmcp-example.
EOF

# Build the .deb. Output to current dir of the caller.
DEB_OUT=lmcp_${PKGVER}-${PKGREL}_all.deb
dpkg-deb --root-owner-group --build "$ROOT" "$HERE/$DEB_OUT"
echo "built: $HERE/$DEB_OUT"