FROM --platform=$BUILDPLATFORM alpine:latest AS builder

ARG PROJECT

# Install ccache along with other dependencies
RUN apk add --no-cache \
    build-base \
    cmake \
    git \
    musl-dev \
    curl \
    bash \
    musl \
    g++ \
    ninja \
    linux-headers \
    mold \
    zlib-static \
    ccache \
    pkgconf \
    pkgconfig \
    libunwind \
    libunwind-dev \
    libunwind-static \
    zlib-dev \
    zlib-static \
    xz \
    xz-dev \
    xz-static \
    xz-libs \
    libdwarf \
    libdwarf-dev \
    elfutils \
    elfutils-dev \
    elfutils-libelf

#RUN apk add --no-cache --update --repository=https://dl-cdn.alpinelinux.org/alpine/v3.16/main/ libexecinfo-dev

# Set working directory
WORKDIR /app

COPY . .

# Configure and build with ccache
RUN  --mount=type=cache,target=/build \
    mkdir -p /build && \
    cmake -G Ninja -S /app -B /build \
    -DCMAKE_BUILD_TYPE=${CMAKE_BUILD_TYPE} \
    -DCMAKE_CXX_COMPILER_LAUNCHER=ccache \
    -DCMAKE_C_COMPILER_LAUNCHER=ccache \
    -DCMAKE_EXE_LINKER_FLAGS="-fuse-ld=mold -static" \
    -DCMAKE_FIND_LIBRARY_SUFFIXES=".a" \
    -DZLIB_BUILD_SHARED=OFF \
    -DZLIB_BUILD_STATIC=ON \
    -DBUILD_SHARED_LIBS=OFF \
    -DPROJECT_NAME="${PROJECT}" \
    -DCMAKE_STRIP=OFF \
    -DIGNORE_DYNAMIC_LOADING=ON \
    ${CMAKE_TOOLCHAIN_FILE:+-DCMAKE_TOOLCHAIN_FILE=$CMAKE_TOOLCHAIN_FILE}


# Explicitly build dependencies first (cached separately)
RUN --mount=type=cache,target=/build cmake --build /build --target run_prebuild_script

RUN --mount=type=cache,target=/build cmake --build /build

# Copy the built executable to a regular directory for the final stage
RUN --mount=type=cache,target=/build mkdir -p /output && \
    find /build -type f -executable -name "*${PROJECT}*" -exec cp {} /output/${PROJECT} \; || \
    find /build -type f -executable -exec cp {} /output/${PROJECT} \;

# Final stage that only contains the binary
FROM scratch AS project

ARG PROJECT

# Copy the actual binary from the regular directory
COPY --from=builder /output/${PROJECT} /${PROJECT}