#!/usr/bin/env bash
# Builds OVRAS for the Steam Frame inside a Debian container (Qt 6.8, the
# series of the Frame's system Qt). Result: build/steamframe-<mode>/Release/,
# packaged by package-release.sh. Adapted from the vrdashboard template.
#
#   build_scripts/steamframe/container-build.sh cross   x86_64 host -> aarch64
#   build_scripts/steamframe/container-build.sh native  for the host's own
#                                     architecture (on the Frame: native arm64)
#   build_scripts/steamframe/container-build.sh <mode> shell
#                                     interactive shell in that container
#
# Uses podman if available, else docker (override with CONTAINER_ENGINE).
set -euo pipefail

here="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
root="$(cd "$here/../.." && pwd)"
mode="${1:-}"
case "$mode" in
    cross)  dockerfile=cross-arm64.Dockerfile
            toolchain="-DCMAKE_TOOLCHAIN_FILE=build_scripts/steamframe/aarch64-linux-gnu.cmake" ;;
    native) dockerfile=native.Dockerfile; toolchain="" ;;
    *) echo "usage: $0 cross|native [shell]" >&2; exit 2 ;;
esac
image="ovras-steamframe-${dockerfile%.Dockerfile}"
engine="${CONTAINER_ENGINE:-$(command -v podman || command -v docker)}"
build="build/steamframe-$mode"

"$engine" build -q -t "$image" -f "$here/$dockerfile" "$here" >/dev/null

# Run as the calling user, so the build tree isn't owned by root.
run=("$engine" run --rm -v "$root:$root:z" -w "$root")
if [[ "$(basename "$engine")" == docker ]]; then
    run+=(--user "$(id -u):$(id -g)")
else
    run+=(--userns=keep-id)
fi
[[ -t 0 ]] && run+=(-it)

if [[ "${2:-}" == shell ]]; then
    exec "${run[@]}" "$image" bash
fi

# OVRAS_STEAM_FRAME: Frame capabilities and defaults
# (src/utils/platform_capabilities.h).
"${run[@]}" "$image" bash -c "
    set -e
    cmake -S . -B $build -G Ninja -DCMAKE_BUILD_TYPE=Release \
          -DOVRAS_STEAM_FRAME=ON $toolchain
    cmake --build $build
"
echo "Built: $root/$build/Release"