build.sh

#!/bin/bash
PWD=$(pwd)
find_path() {
    local name=$1
    if command -v $name > /dev/null 2>&1; then
        command -v $name
        return 0
    fi
    if command -v $name-14 > /dev/null 2>&1; then
        command -v "$name-14"
        return 0
    fi
    echo ""
    return 1
}

CLANG_C=$(find_path "clang")
CLANG_CXX=$(find_path "clang++")

if [ -z "$CLANG_C" ] || [ -z "$CLANG_CXX" ]; then
    echo "clang or clang++ not found"
    exit 1
fi

echo "Found C compiler path: $CLANG_C"
echo "Found C++ compiler path: $CLANG_CXX"

# Check if LLVM needs to be built
LLVM_BUILD_HASH_FILE="3rdparty/llvm-project/LLVM_build_hash"
CURRENT_HASH=$(cd 3rdparty/llvm-project && git rev-parse HEAD)
REBUILD_LLVM=true

if [ -f "$LLVM_BUILD_HASH_FILE" ]; then
    SAVED_HASH=$(cat "$LLVM_BUILD_HASH_FILE")
    if [ "$CURRENT_HASH" = "$SAVED_HASH" ]; then
        echo "LLVM already built with current hash: $CURRENT_HASH"
        REBUILD_LLVM=false
    else
        echo "LLVM hash changed from $SAVED_HASH to $CURRENT_HASH, rebuilding..."
    fi
else
    echo "No previous LLVM build found, building..."
fi

if [ "$REBUILD_LLVM" = true ]; then
    cd 3rdparty/llvm-project && bash build.sh $CLANG_C $CLANG_CXX && cd -
    echo "$CURRENT_HASH" > "$LLVM_BUILD_HASH_FILE"
fi

cmake -B build -G Ninja -DCMAKE_BUILD_TYPE=Debug -DCMAKE_C_COMPILER=$CLANG_C -DCMAKE_CXX_COMPILER=$CLANG_CXX -DCMAKE_EXE_LINKER_FLAGS="-fuse-ld=lld" -DLLVM_DIR=${PWD}/3rdparty/llvm-project/build/lib/cmake/llvm -DPython3_EXECUTABLE=${PWD}/../.pixi/envs/aps/bin/python3 &&
cmake --build build