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

# Queso bundles the BEAM runtime and uses Zig to cross-compile its native
# launcher. Install both tools before running this script.
export PATH="$HOME/.cargo/bin:$PATH"
QUESO="${QUESO:-$(command -v queso || true)}"
if [ -z "$QUESO" ] && [ -x "$HOME/.cargo/bin/queso" ]; then
  QUESO="$HOME/.cargo/bin/queso"
fi
if [ -z "$QUESO" ]; then
  echo "queso is required: cargo install --locked queso" >&2
  exit 1
fi
if ! command -v cargo-zigbuild >/dev/null 2>&1; then
  echo "cargo-zigbuild is required: cargo install cargo-zigbuild" >&2
  exit 1
fi
if ! command -v zig >/dev/null 2>&1; then
  echo "zig is required: https://ziglang.org/download/" >&2
  exit 1
fi
if ! command -v rustup >/dev/null 2>&1; then
  echo "rustup is required to install the Linux cross-compilation targets" >&2
  exit 1
fi

# Queso uses cargo-zigbuild for the native launcher. Keep this setup in the
# build command so a fresh build machine does not fail halfway through.
rustup target add x86_64-unknown-linux-musl aarch64-unknown-linux-musl

rm -rf build/queso
# zstd (used by Queso's launcher) uses cc-rs directly. Point it at Zig so the
# build does not require separate *-linux-musl-gcc packages on the host.
mkdir -p build/luma-cross
cat > build/luma-cross/x86_64-cc <<'EOF'
#!/usr/bin/env bash
args=()
for arg in "$@"; do
  [[ "$arg" == --target=* ]] || args+=("$arg")
done
exec zig cc -target x86_64-linux-musl "${args[@]}"
EOF
cat > build/luma-cross/aarch64-cc <<'EOF'
#!/usr/bin/env bash
args=()
for arg in "$@"; do
  [[ "$arg" == --target=* ]] || args+=("$arg")
done
exec zig cc -target aarch64-linux-musl "${args[@]}"
EOF
chmod +x build/luma-cross/*-cc
export CC_x86_64_unknown_linux_musl="$PWD/build/luma-cross/x86_64-cc"
export CC_aarch64_unknown_linux_musl="$PWD/build/luma-cross/aarch64-cc"

"$QUESO" build \
  --target x86_64-linux-static \
  --target aarch64-linux-static

find build/queso -type f -name '*x86_64*' -perm -u+x -exec cp {} luma_markdown-linux-x86_64 \;
find build/queso -type f -name '*aarch64*' -perm -u+x -exec cp {} luma_markdown-linux-arm64 \;

chmod +x luma_markdown-linux-x86_64 luma_markdown-linux-arm64
echo "Built luma_markdown-linux-x86_64 and luma_markdown-linux-arm64"