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

ROOT_DIR=$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)
SPEC_FILE="$ROOT_DIR/packaging/prem2resolve.spec"

if ! command -v rpmspec >/dev/null 2>&1; then
  echo "rpmspec not found. Install rpm-build." >&2
  exit 1
fi

VERSION=$(rpmspec -q --qf '%{version}\n' "$SPEC_FILE" | head -n1)
NAME=$(rpmspec -q --qf '%{name}\n' "$SPEC_FILE" | head -n1)

DIST_DIR="$ROOT_DIR/dist"
TOPDIR="$ROOT_DIR/rpmbuild"
TARBALL="$DIST_DIR/${NAME}-${VERSION}.tar.gz"

mkdir -p "$DIST_DIR" "$TOPDIR/BUILD" "$TOPDIR/RPMS" "$TOPDIR/SOURCES" "$TOPDIR/SPECS" "$TOPDIR/SRPMS"

if ! git -C "$ROOT_DIR" rev-parse --is-inside-work-tree >/dev/null 2>&1; then
  echo "Not a git repository; cannot create source archive." >&2
  exit 1
fi

git -C "$ROOT_DIR" archive --format=tar --prefix="${NAME}-${VERSION}/" HEAD | gzip -n > "$TARBALL"

cp "$SPEC_FILE" "$TOPDIR/SPECS/"
cp "$TARBALL" "$TOPDIR/SOURCES/"

rpmbuild --define "_topdir $TOPDIR" -ba "$TOPDIR/SPECS/$(basename "$SPEC_FILE")"

echo "Built RPM(s) in: $TOPDIR/RPMS"