#!/bin/bash
# SPDX-License-Identifier: Apache-2.0
# Build the ctool Debian package for one architecture.
# Usage: build-deb.sh ctool <amd64|arm64> <version>
#
# The commit hash and build date are baked into the binary at link time
# via -ldflags in the Makefile, so `ctool version` is the source of truth
# for "which build". The .deb itself carries only the release version.
set -euo pipefail

PACKAGE="${1:?usage: build-deb.sh ctool <amd64|arm64> <version>}"
ARCH="${2:?usage: build-deb.sh ctool <amd64|arm64> <version>}"
VERSION="${3:?usage: build-deb.sh ctool <amd64|arm64> <version>}"

REPO_ROOT="$(cd "$(dirname "$0")/.." && pwd)"
PKG="${PACKAGE}_${VERSION}_${ARCH}"
STAGING="$(mktemp -d)"
trap 'rm -rf "$STAGING"' EXIT

echo "Building ${PKG}.deb"

if [ "$PACKAGE" != "ctool" ]; then
    echo "error: unknown package '${PACKAGE}' (expected ctool)" >&2
    exit 2
fi

install -d "$STAGING/DEBIAN"
install -d "$STAGING/usr/bin"
install -d "$STAGING/usr/share/man/man1"

# Binary. ctool is an interactive tool, not a daemon, so it lives in
# /usr/bin and is on every login shell's PATH by default.
install -m 755 "$REPO_ROOT/build/${ARCH}/ctool" "$STAGING/usr/bin/ctool"

# ctfetch and ctail are busybox-style aliases: the binary dispatches on
# argv[0], so a symlink is all it takes for `ctfetch ...` to mean
# `ctool fetch ...` and `ctail ...` to mean `ctool tail ...`.
ln -s ctool "$STAGING/usr/bin/ctfetch"
ln -s ctool "$STAGING/usr/bin/ctail"

# Manpages — one overview (ctool) plus one detailed page per subcommand.
gzip -9 -c "$REPO_ROOT/docs/ctool.1"   > "$STAGING/usr/share/man/man1/ctool.1.gz"
gzip -9 -c "$REPO_ROOT/docs/ctfetch.1" > "$STAGING/usr/share/man/man1/ctfetch.1.gz"
gzip -9 -c "$REPO_ROOT/docs/ctail.1"   > "$STAGING/usr/share/man/man1/ctail.1.gz"

# DEBIAN metadata. No conffiles and no maintainer scripts — the package
# ships a single binary, two symlinks, and three manpages.
sed "s/@VERSION@/${VERSION}/;s/@ARCH@/${ARCH}/" \
    "$REPO_ROOT/debian/${PACKAGE}.control.in" > "$STAGING/DEBIAN/control"

# Emit package into build/
mkdir -p "$REPO_ROOT/build"
OUT="$REPO_ROOT/build/${PKG}.deb"
dpkg-deb --build --root-owner-group "$STAGING" "$OUT"
echo "Built: $OUT"