[source]
# Local overlay recipe. Firmware sources are fetched during the custom build step into a shared
# cache, then staged into /lib/firmware.
path = "source"
upstream = "https://gitlab.com/kernel-firmware/linux-firmware.git"

[build]
template = "custom"
script = """
FIRMWARE_URL="https://gitlab.com/kernel-firmware/linux-firmware/-/archive/main/linux-firmware-main.tar.gz"
CACHE_DIR="${COOKBOOK_ROOT}/build/redbear-firmware-cache"
ARCHIVE="${CACHE_DIR}/linux-firmware-main.tar.gz"
EXTRACTED="${CACHE_DIR}/linux-firmware-main"

mkdir -p "${CACHE_DIR}"

if [ ! -f "${ARCHIVE}" ]; then
    wget -O "${ARCHIVE}" "${FIRMWARE_URL}"
fi

rm -rf "${EXTRACTED}"
mkdir -p "${EXTRACTED}"
tar -xf "${ARCHIVE}" -C "${EXTRACTED}" --strip-components=1

mkdir -p "${COOKBOOK_STAGE}/lib/firmware"
mkdir -p "${COOKBOOK_STAGE}/lib/firmware/LICENSES"

# Install all firmware payloads from linux-firmware while keeping license metadata separate.
while IFS= read -r -d '' file; do
    rel="${file#${EXTRACTED}/}"
    case "$(basename "$rel")" in
        README|README.md|Makefile|check_whence.py)
            continue
            ;;
        LICENCE*|LICENSE*)
            install -Dm0644 "$file" "${COOKBOOK_STAGE}/lib/firmware/LICENSES/$(basename "$rel")"
            continue
            ;;
        WHENCE)
            install -Dm0644 "$file" "${COOKBOOK_STAGE}/lib/firmware/LICENSES/WHENCE"
            continue
            ;;
    esac
    install -Dm0644 "$file" "${COOKBOOK_STAGE}/lib/firmware/${rel}"
done < <(find "${EXTRACTED}" -type f -print0)

cat > "${COOKBOOK_STAGE}/lib/firmware/LICENSES/index.txt" <<'EOF'
Red Bear firmware bundle
========================

Firmware under /lib/firmware is third-party upstream firmware from linux-firmware.
Licenses vary by vendor and artifact.

See:
- /lib/firmware/LICENSES/WHENCE
- /lib/firmware/LICENSES/LICENCE.*
- /lib/firmware/LICENSES/LICENSE*

Firmware is redistributed unmodified and remains under its own licenses.
EOF
"""