#!/bin/bash
# Build sic-agent_<ver>_<arch>.deb using dpkg-deb (Go cross-build of the client
# plus the agent skills).
#
# Usage: ./build-deb.sh [amd64|arm64]     (default: host dpkg architecture)
# Needs: go, dpkg-deb, curl.
set -euo pipefail

PKGVER=0.2.0
PKGREL=1
SIC_TARBALL_SHA256=fe0569013da5bfa248743cd04bc2f09da8217b04432aa69827ed5287a133a37c
HERE=$(dirname "$(readlink -f "$0")")

DEB_ARCH="${1:-$(dpkg --print-architecture)}"
case "$DEB_ARCH" in
    amd64) GOARCH=amd64 ;;
    arm64) GOARCH=arm64 ;;
    *) echo "unsupported arch: $DEB_ARCH (use amd64 or arm64)" >&2; exit 1 ;;
esac

export SOURCE_DATE_EPOCH=1784808000

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

curl -sSLfo sic.tar.gz \
    "https://git.reauktion.de/marfrit/sic/archive/v${PKGVER}.tar.gz"
echo "$SIC_TARBALL_SHA256  sic.tar.gz" | sha256sum -c
tar xzf sic.tar.gz

( cd sic && GOOS=linux GOARCH="$GOARCH" CGO_ENABLED=0 \
    GOFLAGS='-buildvcs=false -trimpath' go build -ldflags='-s -w' -o sic ./cmd/sic )

ROOT="$work/pkgroot"
mkdir -p "$ROOT/DEBIAN" "$ROOT/usr/bin" \
         "$ROOT/usr/share/sic-agent/skills/sic" \
         "$ROOT/usr/share/sic-agent/skills/sic-bg" \
         "$ROOT/usr/share/doc/sic-agent"
install -m755 sic/sic          "$ROOT/usr/bin/sic"
install -m644 sic/SKILL.md     "$ROOT/usr/share/sic-agent/skills/sic/SKILL.md"
install -m644 sic/SKILL-bg.md  "$ROOT/usr/share/sic-agent/skills/sic-bg/SKILL.md"
install -m644 sic/README.md    "$ROOT/usr/share/doc/sic-agent/README.md"
install -m644 "$HERE/debian/copyright" "$ROOT/usr/share/doc/sic-agent/copyright"

{
    echo "Package: sic-agent"
    echo "Version: ${PKGVER}-${PKGREL}"
    echo "Architecture: ${DEB_ARCH}"
    echo "Maintainer: Markus Fritsche <mfritsche@reauktion.de>"
    echo "Section: net"
    echo "Priority: optional"
    echo "Depends: openssh-client"
    echo "Homepage: https://git.reauktion.de/marfrit/sic"
    echo "Description: sic client and agent skills for remote command execution"
    echo " The sic client frames argv as netstrings and pipes it over ssh to"
    echo " sicd on a remote host. Installs /usr/bin/sic and foreground/background"
    echo " agent skills under /usr/share/sic-agent/skills/; link them into the"
    echo " agent's skills directory to activate. Targets need the sicd package."
} > "$ROOT/DEBIAN/control"

OUT="$HERE/sic-agent_${PKGVER}-${PKGREL}_${DEB_ARCH}.deb"
rm -f "$OUT"
dpkg-deb --root-owner-group --build "$ROOT" "$OUT"
echo "built $OUT"