# syntax=docker/dockerfile:1.4
FROM --platform=$BUILDPLATFORM alpine:3.19 AS deps

# Install build dependencies
RUN apk add --no-cache \
    build-base \
    cmake \
    git \
    linux-headers \
    musl-dev \
    zlib \
    zlib-dev \
    zlib-static \
    bzip2-static \
    xz-static \
    zstd-static \
    curl \
    bash \
    gcc \
    g++ \
    libstdc++ \
    ccache \
    ninja \
    pkgconfig

FROM deps AS build

ARG TARGETARCH
WORKDIR /source
COPY . .

# Create and run build script
RUN printf '#!/bin/bash\n\
set -e\n\
echo "Setting up build directory..."\n\
mkdir -p /build/ccache\n\
mkdir -p /build/build_${TARGETARCH}\n\
\n\
echo "Checking static libraries..."\n\
ls -la /usr/lib/libz.a /usr/lib/libstdc++.a /usr/lib/libc.a || true\n\
\n\
echo "Setting up ccache..."\n\
export CCACHE_DIR=/build/ccache\n\
export CCACHE_MAXSIZE=2G\n\
export PATH="/usr/lib/ccache/bin:$PATH"\n\
\n\
echo "Running CMake configuration..."\n\
cd /build/build_${TARGETARCH}\n\
cmake /source -G Ninja -DCMAKE_BUILD_TYPE=Release \
    -DCMAKE_FIND_LIBRARY_SUFFIXES=".a" \
    -DBUILD_SHARED_LIBS=OFF \
    -DCMAKE_C_COMPILER_LAUNCHER=ccache \
    -DCMAKE_CXX_COMPILER_LAUNCHER=ccache \
    -DCMAKE_POLICY_DEFAULT_CMP0074=NEW \
    -DZLIB_INCLUDE_DIR=/usr/include \
    -DZLIB_USE_STATIC_LIBS=TRUE \
    -DCMAKE_EXE_LINKER_FLAGS="-Wl,-Bstatic -lz -lstdc++ -static-libgcc" \
    -DCMAKE_C_FLAGS="-fPIC" \
    -DCMAKE_CXX_FLAGS="-fPIC" \
    -DCMAKE_FIND_LIBRARY_CUSTOM_LIB_SUFFIX=".a" 2>&1 | tee cmake.log\n\
\n\
echo "Starting build..."\n\
ninja -v -j$(nproc) 2>&1 | tee build.log\n\
\n\
echo "Build complete. Checking for binary..."\n\
if [ ! -f dropshell ]; then\n\
    echo "Build failed. Directory contents:"\n\
    ls -la\n\
    echo "CMake log:"\n\
    cat cmake.log\n\
    echo "Build log:"\n\
    cat build.log\n\
    exit 1\n\
fi\n\
\n\
echo "ccache stats:"\n\
ccache -s\n' > /source/docker_build.sh && chmod +x /source/docker_build.sh && /source/docker_build.sh

# Final stage: copy out the binary
FROM scratch AS export-stage
ARG TARGETARCH
COPY --from=build /build/build_${TARGETARCH}/dropshell /dropshell