#!/usr/bin/env sh
# Regenerate the committed SPIR-V blobs under shaders/generated/.
#
# The build embeds the .spv files directly (see CMakeLists.txt), so no shader
# compiler is needed to build OpenRA3. Run this only after editing a .vert/.frag.
#
# Needs one of: glslc (shaderc) or glslangValidator (glslang-tools). On a host
# without either, use a throwaway container:
#   docker run --rm -v "$PWD/shaders:/s" ubuntu:26.04 bash -c \
#     "apt-get update -qq && apt-get install -y -qq glslang-tools && \
#      cd /s && sh ./compile.sh"
set -eu

DIR="$(cd "$(dirname "$0")" && pwd)"
OUT="$DIR/generated"
mkdir -p "$OUT"

compile() {
    src="$1"
    dst="$2"
    if command -v glslc >/dev/null 2>&1; then
        glslc "$src" -o "$dst"
    else
        glslangValidator -V "$src" -o "$dst"
    fi
}

for name in scene terrain object; do
    compile "$DIR/$name.vert" "$OUT/$name.vert.spv"
    compile "$DIR/$name.frag" "$OUT/$name.frag.spv"
done

echo "wrote $OUT/{scene,terrain,object}.{vert,frag}.spv"